diff --git a/test/expressions/zero_init/array/bool.wgsl b/test/expressions/zero_init/array/bool.wgsl
new file mode 100644
index 0000000..7df85e7
--- /dev/null
+++ b/test/expressions/zero_init/array/bool.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+    var v = array<bool, 4>();
+}
diff --git a/test/expressions/zero_init/array/bool.wgsl.expected.hlsl b/test/expressions/zero_init/array/bool.wgsl.expected.hlsl
new file mode 100644
index 0000000..eedc606
--- /dev/null
+++ b/test/expressions/zero_init/array/bool.wgsl.expected.hlsl
@@ -0,0 +1,12 @@
+[numthreads(1, 1, 1)]
+void unused_entry_point() {
+  return;
+}
+
+struct tint_array_wrapper {
+  bool arr[4];
+};
+
+void f() {
+  tint_array_wrapper v = {{false, false, false, false}};
+}
diff --git a/test/expressions/zero_init/array/bool.wgsl.expected.msl b/test/expressions/zero_init/array/bool.wgsl.expected.msl
new file mode 100644
index 0000000..ead82c7
--- /dev/null
+++ b/test/expressions/zero_init/array/bool.wgsl.expected.msl
@@ -0,0 +1,11 @@
+#include <metal_stdlib>
+
+using namespace metal;
+struct tint_array_wrapper {
+  bool arr[4];
+};
+
+void f() {
+  tint_array_wrapper v = {.arr={}};
+}
+
diff --git a/test/expressions/zero_init/array/bool.wgsl.expected.spvasm b/test/expressions/zero_init/array/bool.wgsl.expected.spvasm
new file mode 100644
index 0000000..dd9ecff
--- /dev/null
+++ b/test/expressions/zero_init/array/bool.wgsl.expected.spvasm
@@ -0,0 +1,31 @@
+; SPIR-V
+; Version: 1.3
+; Generator: Google Tint Compiler; 0
+; Bound: 14
+; Schema: 0
+               OpCapability Shader
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint GLCompute %unused_entry_point "unused_entry_point"
+               OpExecutionMode %unused_entry_point LocalSize 1 1 1
+               OpName %unused_entry_point "unused_entry_point"
+               OpName %f "f"
+               OpName %v "v"
+               OpDecorate %_arr_bool_uint_4 ArrayStride 4
+       %void = OpTypeVoid
+          %1 = OpTypeFunction %void
+       %bool = OpTypeBool
+       %uint = OpTypeInt 32 0
+     %uint_4 = OpConstant %uint 4
+%_arr_bool_uint_4 = OpTypeArray %bool %uint_4
+         %11 = OpConstantNull %_arr_bool_uint_4
+%_ptr_Function__arr_bool_uint_4 = OpTypePointer Function %_arr_bool_uint_4
+%unused_entry_point = OpFunction %void None %1
+          %4 = OpLabel
+               OpReturn
+               OpFunctionEnd
+          %f = OpFunction %void None %1
+          %6 = OpLabel
+          %v = OpVariable %_ptr_Function__arr_bool_uint_4 Function %11
+               OpStore %v %11
+               OpReturn
+               OpFunctionEnd
diff --git a/test/expressions/zero_init/array/bool.wgsl.expected.wgsl b/test/expressions/zero_init/array/bool.wgsl.expected.wgsl
new file mode 100644
index 0000000..c058d58
--- /dev/null
+++ b/test/expressions/zero_init/array/bool.wgsl.expected.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+  var v = array<bool, 4>();
+}
diff --git a/test/expressions/zero_init/array/f32.wgsl b/test/expressions/zero_init/array/f32.wgsl
new file mode 100644
index 0000000..1e6816b
--- /dev/null
+++ b/test/expressions/zero_init/array/f32.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+    var v = array<f32, 4>();
+}
diff --git a/test/expressions/zero_init/array/f32.wgsl.expected.hlsl b/test/expressions/zero_init/array/f32.wgsl.expected.hlsl
new file mode 100644
index 0000000..652c835
--- /dev/null
+++ b/test/expressions/zero_init/array/f32.wgsl.expected.hlsl
@@ -0,0 +1,12 @@
+[numthreads(1, 1, 1)]
+void unused_entry_point() {
+  return;
+}
+
+struct tint_array_wrapper {
+  float arr[4];
+};
+
+void f() {
+  tint_array_wrapper v = {{0.0f, 0.0f, 0.0f, 0.0f}};
+}
diff --git a/test/expressions/zero_init/array/f32.wgsl.expected.msl b/test/expressions/zero_init/array/f32.wgsl.expected.msl
new file mode 100644
index 0000000..7a8df6c
--- /dev/null
+++ b/test/expressions/zero_init/array/f32.wgsl.expected.msl
@@ -0,0 +1,11 @@
+#include <metal_stdlib>
+
+using namespace metal;
+struct tint_array_wrapper {
+  float arr[4];
+};
+
+void f() {
+  tint_array_wrapper v = {.arr={}};
+}
+
diff --git a/test/expressions/zero_init/array/f32.wgsl.expected.spvasm b/test/expressions/zero_init/array/f32.wgsl.expected.spvasm
new file mode 100644
index 0000000..c44704b
--- /dev/null
+++ b/test/expressions/zero_init/array/f32.wgsl.expected.spvasm
@@ -0,0 +1,31 @@
+; SPIR-V
+; Version: 1.3
+; Generator: Google Tint Compiler; 0
+; Bound: 14
+; Schema: 0
+               OpCapability Shader
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint GLCompute %unused_entry_point "unused_entry_point"
+               OpExecutionMode %unused_entry_point LocalSize 1 1 1
+               OpName %unused_entry_point "unused_entry_point"
+               OpName %f "f"
+               OpName %v "v"
+               OpDecorate %_arr_float_uint_4 ArrayStride 4
+       %void = OpTypeVoid
+          %1 = OpTypeFunction %void
+      %float = OpTypeFloat 32
+       %uint = OpTypeInt 32 0
+     %uint_4 = OpConstant %uint 4
+%_arr_float_uint_4 = OpTypeArray %float %uint_4
+         %11 = OpConstantNull %_arr_float_uint_4
+%_ptr_Function__arr_float_uint_4 = OpTypePointer Function %_arr_float_uint_4
+%unused_entry_point = OpFunction %void None %1
+          %4 = OpLabel
+               OpReturn
+               OpFunctionEnd
+          %f = OpFunction %void None %1
+          %6 = OpLabel
+          %v = OpVariable %_ptr_Function__arr_float_uint_4 Function %11
+               OpStore %v %11
+               OpReturn
+               OpFunctionEnd
diff --git a/test/expressions/zero_init/array/f32.wgsl.expected.wgsl b/test/expressions/zero_init/array/f32.wgsl.expected.wgsl
new file mode 100644
index 0000000..a60e712
--- /dev/null
+++ b/test/expressions/zero_init/array/f32.wgsl.expected.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+  var v = array<f32, 4>();
+}
diff --git a/test/expressions/zero_init/array/i32.wgsl b/test/expressions/zero_init/array/i32.wgsl
new file mode 100644
index 0000000..a6c69cb
--- /dev/null
+++ b/test/expressions/zero_init/array/i32.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+    var v = array<i32, 4>();
+}
diff --git a/test/expressions/zero_init/array/i32.wgsl.expected.hlsl b/test/expressions/zero_init/array/i32.wgsl.expected.hlsl
new file mode 100644
index 0000000..94a6069
--- /dev/null
+++ b/test/expressions/zero_init/array/i32.wgsl.expected.hlsl
@@ -0,0 +1,12 @@
+[numthreads(1, 1, 1)]
+void unused_entry_point() {
+  return;
+}
+
+struct tint_array_wrapper {
+  int arr[4];
+};
+
+void f() {
+  tint_array_wrapper v = {{0, 0, 0, 0}};
+}
diff --git a/test/expressions/zero_init/array/i32.wgsl.expected.msl b/test/expressions/zero_init/array/i32.wgsl.expected.msl
new file mode 100644
index 0000000..e8cd266
--- /dev/null
+++ b/test/expressions/zero_init/array/i32.wgsl.expected.msl
@@ -0,0 +1,11 @@
+#include <metal_stdlib>
+
+using namespace metal;
+struct tint_array_wrapper {
+  int arr[4];
+};
+
+void f() {
+  tint_array_wrapper v = {.arr={}};
+}
+
diff --git a/test/expressions/zero_init/array/i32.wgsl.expected.spvasm b/test/expressions/zero_init/array/i32.wgsl.expected.spvasm
new file mode 100644
index 0000000..1fe83f3
--- /dev/null
+++ b/test/expressions/zero_init/array/i32.wgsl.expected.spvasm
@@ -0,0 +1,31 @@
+; SPIR-V
+; Version: 1.3
+; Generator: Google Tint Compiler; 0
+; Bound: 14
+; Schema: 0
+               OpCapability Shader
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint GLCompute %unused_entry_point "unused_entry_point"
+               OpExecutionMode %unused_entry_point LocalSize 1 1 1
+               OpName %unused_entry_point "unused_entry_point"
+               OpName %f "f"
+               OpName %v "v"
+               OpDecorate %_arr_int_uint_4 ArrayStride 4
+       %void = OpTypeVoid
+          %1 = OpTypeFunction %void
+        %int = OpTypeInt 32 1
+       %uint = OpTypeInt 32 0
+     %uint_4 = OpConstant %uint 4
+%_arr_int_uint_4 = OpTypeArray %int %uint_4
+         %11 = OpConstantNull %_arr_int_uint_4
+%_ptr_Function__arr_int_uint_4 = OpTypePointer Function %_arr_int_uint_4
+%unused_entry_point = OpFunction %void None %1
+          %4 = OpLabel
+               OpReturn
+               OpFunctionEnd
+          %f = OpFunction %void None %1
+          %6 = OpLabel
+          %v = OpVariable %_ptr_Function__arr_int_uint_4 Function %11
+               OpStore %v %11
+               OpReturn
+               OpFunctionEnd
diff --git a/test/expressions/zero_init/array/i32.wgsl.expected.wgsl b/test/expressions/zero_init/array/i32.wgsl.expected.wgsl
new file mode 100644
index 0000000..0983f63
--- /dev/null
+++ b/test/expressions/zero_init/array/i32.wgsl.expected.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+  var v = array<i32, 4>();
+}
diff --git a/test/expressions/zero_init/array/struct.wgsl b/test/expressions/zero_init/array/struct.wgsl
new file mode 100644
index 0000000..e563640
--- /dev/null
+++ b/test/expressions/zero_init/array/struct.wgsl
@@ -0,0 +1,10 @@
+struct S {
+    i : i32;
+    u : u32;
+    f : f32;
+    b : bool;
+};
+
+fn f() {
+    var v = array<S, 4>();
+}
diff --git a/test/expressions/zero_init/array/struct.wgsl.expected.hlsl b/test/expressions/zero_init/array/struct.wgsl.expected.hlsl
new file mode 100644
index 0000000..dbe7bdf
--- /dev/null
+++ b/test/expressions/zero_init/array/struct.wgsl.expected.hlsl
@@ -0,0 +1,18 @@
+[numthreads(1, 1, 1)]
+void unused_entry_point() {
+  return;
+}
+
+struct S {
+  int i;
+  uint u;
+  float f;
+  bool b;
+};
+struct tint_array_wrapper {
+  S arr[4];
+};
+
+void f() {
+  tint_array_wrapper v = {{{0, 0u, 0.0f, false}, {0, 0u, 0.0f, false}, {0, 0u, 0.0f, false}, {0, 0u, 0.0f, false}}};
+}
diff --git a/test/expressions/zero_init/array/struct.wgsl.expected.msl b/test/expressions/zero_init/array/struct.wgsl.expected.msl
new file mode 100644
index 0000000..8dc9f2e
--- /dev/null
+++ b/test/expressions/zero_init/array/struct.wgsl.expected.msl
@@ -0,0 +1,17 @@
+#include <metal_stdlib>
+
+using namespace metal;
+struct S {
+  int i;
+  uint u;
+  float f;
+  bool b;
+};
+struct tint_array_wrapper {
+  S arr[4];
+};
+
+void f() {
+  tint_array_wrapper v = {.arr={}};
+}
+
diff --git a/test/expressions/zero_init/array/struct.wgsl.expected.spvasm b/test/expressions/zero_init/array/struct.wgsl.expected.spvasm
new file mode 100644
index 0000000..7014af9
--- /dev/null
+++ b/test/expressions/zero_init/array/struct.wgsl.expected.spvasm
@@ -0,0 +1,43 @@
+; SPIR-V
+; Version: 1.3
+; Generator: Google Tint Compiler; 0
+; Bound: 17
+; Schema: 0
+               OpCapability Shader
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint GLCompute %unused_entry_point "unused_entry_point"
+               OpExecutionMode %unused_entry_point LocalSize 1 1 1
+               OpName %unused_entry_point "unused_entry_point"
+               OpName %f "f"
+               OpName %S "S"
+               OpMemberName %S 0 "i"
+               OpMemberName %S 1 "u"
+               OpMemberName %S 2 "f"
+               OpMemberName %S 3 "b"
+               OpName %v "v"
+               OpMemberDecorate %S 0 Offset 0
+               OpMemberDecorate %S 1 Offset 4
+               OpMemberDecorate %S 2 Offset 8
+               OpMemberDecorate %S 3 Offset 12
+               OpDecorate %_arr_S_uint_4 ArrayStride 16
+       %void = OpTypeVoid
+          %1 = OpTypeFunction %void
+        %int = OpTypeInt 32 1
+       %uint = OpTypeInt 32 0
+      %float = OpTypeFloat 32
+       %bool = OpTypeBool
+          %S = OpTypeStruct %int %uint %float %bool
+     %uint_4 = OpConstant %uint 4
+%_arr_S_uint_4 = OpTypeArray %S %uint_4
+         %14 = OpConstantNull %_arr_S_uint_4
+%_ptr_Function__arr_S_uint_4 = OpTypePointer Function %_arr_S_uint_4
+%unused_entry_point = OpFunction %void None %1
+          %4 = OpLabel
+               OpReturn
+               OpFunctionEnd
+          %f = OpFunction %void None %1
+          %6 = OpLabel
+          %v = OpVariable %_ptr_Function__arr_S_uint_4 Function %14
+               OpStore %v %14
+               OpReturn
+               OpFunctionEnd
diff --git a/test/expressions/zero_init/array/struct.wgsl.expected.wgsl b/test/expressions/zero_init/array/struct.wgsl.expected.wgsl
new file mode 100644
index 0000000..939e93b
--- /dev/null
+++ b/test/expressions/zero_init/array/struct.wgsl.expected.wgsl
@@ -0,0 +1,10 @@
+struct S {
+  i : i32;
+  u : u32;
+  f : f32;
+  b : bool;
+};
+
+fn f() {
+  var v = array<S, 4>();
+}
diff --git a/test/expressions/zero_init/array/u32.wgsl b/test/expressions/zero_init/array/u32.wgsl
new file mode 100644
index 0000000..2ad37e5
--- /dev/null
+++ b/test/expressions/zero_init/array/u32.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+    var v = array<u32, 4>();
+}
diff --git a/test/expressions/zero_init/array/u32.wgsl.expected.hlsl b/test/expressions/zero_init/array/u32.wgsl.expected.hlsl
new file mode 100644
index 0000000..6d036da
--- /dev/null
+++ b/test/expressions/zero_init/array/u32.wgsl.expected.hlsl
@@ -0,0 +1,12 @@
+[numthreads(1, 1, 1)]
+void unused_entry_point() {
+  return;
+}
+
+struct tint_array_wrapper {
+  uint arr[4];
+};
+
+void f() {
+  tint_array_wrapper v = {{0u, 0u, 0u, 0u}};
+}
diff --git a/test/expressions/zero_init/array/u32.wgsl.expected.msl b/test/expressions/zero_init/array/u32.wgsl.expected.msl
new file mode 100644
index 0000000..83dceb0
--- /dev/null
+++ b/test/expressions/zero_init/array/u32.wgsl.expected.msl
@@ -0,0 +1,11 @@
+#include <metal_stdlib>
+
+using namespace metal;
+struct tint_array_wrapper {
+  uint arr[4];
+};
+
+void f() {
+  tint_array_wrapper v = {.arr={}};
+}
+
diff --git a/test/expressions/zero_init/array/u32.wgsl.expected.spvasm b/test/expressions/zero_init/array/u32.wgsl.expected.spvasm
new file mode 100644
index 0000000..16e60e6
--- /dev/null
+++ b/test/expressions/zero_init/array/u32.wgsl.expected.spvasm
@@ -0,0 +1,30 @@
+; SPIR-V
+; Version: 1.3
+; Generator: Google Tint Compiler; 0
+; Bound: 13
+; Schema: 0
+               OpCapability Shader
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint GLCompute %unused_entry_point "unused_entry_point"
+               OpExecutionMode %unused_entry_point LocalSize 1 1 1
+               OpName %unused_entry_point "unused_entry_point"
+               OpName %f "f"
+               OpName %v "v"
+               OpDecorate %_arr_uint_uint_4 ArrayStride 4
+       %void = OpTypeVoid
+          %1 = OpTypeFunction %void
+       %uint = OpTypeInt 32 0
+     %uint_4 = OpConstant %uint 4
+%_arr_uint_uint_4 = OpTypeArray %uint %uint_4
+         %10 = OpConstantNull %_arr_uint_uint_4
+%_ptr_Function__arr_uint_uint_4 = OpTypePointer Function %_arr_uint_uint_4
+%unused_entry_point = OpFunction %void None %1
+          %4 = OpLabel
+               OpReturn
+               OpFunctionEnd
+          %f = OpFunction %void None %1
+          %6 = OpLabel
+          %v = OpVariable %_ptr_Function__arr_uint_uint_4 Function %10
+               OpStore %v %10
+               OpReturn
+               OpFunctionEnd
diff --git a/test/expressions/zero_init/array/u32.wgsl.expected.wgsl b/test/expressions/zero_init/array/u32.wgsl.expected.wgsl
new file mode 100644
index 0000000..36003ef
--- /dev/null
+++ b/test/expressions/zero_init/array/u32.wgsl.expected.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+  var v = array<u32, 4>();
+}
diff --git a/test/expressions/zero_init/mat2x2/f32.wgsl b/test/expressions/zero_init/mat2x2/f32.wgsl
new file mode 100644
index 0000000..a3349b1
--- /dev/null
+++ b/test/expressions/zero_init/mat2x2/f32.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+    var v = mat2x2<f32>();
+}
diff --git a/test/expressions/zero_init/mat2x2/f32.wgsl.expected.hlsl b/test/expressions/zero_init/mat2x2/f32.wgsl.expected.hlsl
new file mode 100644
index 0000000..d711f22
--- /dev/null
+++ b/test/expressions/zero_init/mat2x2/f32.wgsl.expected.hlsl
@@ -0,0 +1,8 @@
+[numthreads(1, 1, 1)]
+void unused_entry_point() {
+  return;
+}
+
+void f() {
+  float2x2 v = float2x2(0.0f, 0.0f, 0.0f, 0.0f);
+}
diff --git a/test/expressions/zero_init/mat2x2/f32.wgsl.expected.msl b/test/expressions/zero_init/mat2x2/f32.wgsl.expected.msl
new file mode 100644
index 0000000..323a16b
--- /dev/null
+++ b/test/expressions/zero_init/mat2x2/f32.wgsl.expected.msl
@@ -0,0 +1,7 @@
+#include <metal_stdlib>
+
+using namespace metal;
+void f() {
+  float2x2 v = float2x2();
+}
+
diff --git a/test/expressions/zero_init/mat2x2/f32.wgsl.expected.spvasm b/test/expressions/zero_init/mat2x2/f32.wgsl.expected.spvasm
new file mode 100644
index 0000000..7ad3d3b
--- /dev/null
+++ b/test/expressions/zero_init/mat2x2/f32.wgsl.expected.spvasm
@@ -0,0 +1,29 @@
+; SPIR-V
+; Version: 1.3
+; Generator: Google Tint Compiler; 0
+; Bound: 13
+; Schema: 0
+               OpCapability Shader
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint GLCompute %unused_entry_point "unused_entry_point"
+               OpExecutionMode %unused_entry_point LocalSize 1 1 1
+               OpName %unused_entry_point "unused_entry_point"
+               OpName %f "f"
+               OpName %v "v"
+       %void = OpTypeVoid
+          %1 = OpTypeFunction %void
+      %float = OpTypeFloat 32
+    %v2float = OpTypeVector %float 2
+%mat2v2float = OpTypeMatrix %v2float 2
+         %10 = OpConstantNull %mat2v2float
+%_ptr_Function_mat2v2float = OpTypePointer Function %mat2v2float
+%unused_entry_point = OpFunction %void None %1
+          %4 = OpLabel
+               OpReturn
+               OpFunctionEnd
+          %f = OpFunction %void None %1
+          %6 = OpLabel
+          %v = OpVariable %_ptr_Function_mat2v2float Function %10
+               OpStore %v %10
+               OpReturn
+               OpFunctionEnd
diff --git a/test/expressions/zero_init/mat2x2/f32.wgsl.expected.wgsl b/test/expressions/zero_init/mat2x2/f32.wgsl.expected.wgsl
new file mode 100644
index 0000000..8987148
--- /dev/null
+++ b/test/expressions/zero_init/mat2x2/f32.wgsl.expected.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+  var v = mat2x2<f32>();
+}
diff --git a/test/expressions/zero_init/mat2x3/f32.wgsl b/test/expressions/zero_init/mat2x3/f32.wgsl
new file mode 100644
index 0000000..070c6c6
--- /dev/null
+++ b/test/expressions/zero_init/mat2x3/f32.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+    var v = mat2x3<f32>();
+}
diff --git a/test/expressions/zero_init/mat2x3/f32.wgsl.expected.hlsl b/test/expressions/zero_init/mat2x3/f32.wgsl.expected.hlsl
new file mode 100644
index 0000000..7687274
--- /dev/null
+++ b/test/expressions/zero_init/mat2x3/f32.wgsl.expected.hlsl
@@ -0,0 +1,8 @@
+[numthreads(1, 1, 1)]
+void unused_entry_point() {
+  return;
+}
+
+void f() {
+  float2x3 v = float2x3(0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f);
+}
diff --git a/test/expressions/zero_init/mat2x3/f32.wgsl.expected.msl b/test/expressions/zero_init/mat2x3/f32.wgsl.expected.msl
new file mode 100644
index 0000000..6b1c1a6
--- /dev/null
+++ b/test/expressions/zero_init/mat2x3/f32.wgsl.expected.msl
@@ -0,0 +1,7 @@
+#include <metal_stdlib>
+
+using namespace metal;
+void f() {
+  float2x3 v = float2x3();
+}
+
diff --git a/test/expressions/zero_init/mat2x3/f32.wgsl.expected.spvasm b/test/expressions/zero_init/mat2x3/f32.wgsl.expected.spvasm
new file mode 100644
index 0000000..47a0aaa
--- /dev/null
+++ b/test/expressions/zero_init/mat2x3/f32.wgsl.expected.spvasm
@@ -0,0 +1,29 @@
+; SPIR-V
+; Version: 1.3
+; Generator: Google Tint Compiler; 0
+; Bound: 13
+; Schema: 0
+               OpCapability Shader
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint GLCompute %unused_entry_point "unused_entry_point"
+               OpExecutionMode %unused_entry_point LocalSize 1 1 1
+               OpName %unused_entry_point "unused_entry_point"
+               OpName %f "f"
+               OpName %v "v"
+       %void = OpTypeVoid
+          %1 = OpTypeFunction %void
+      %float = OpTypeFloat 32
+    %v3float = OpTypeVector %float 3
+%mat2v3float = OpTypeMatrix %v3float 2
+         %10 = OpConstantNull %mat2v3float
+%_ptr_Function_mat2v3float = OpTypePointer Function %mat2v3float
+%unused_entry_point = OpFunction %void None %1
+          %4 = OpLabel
+               OpReturn
+               OpFunctionEnd
+          %f = OpFunction %void None %1
+          %6 = OpLabel
+          %v = OpVariable %_ptr_Function_mat2v3float Function %10
+               OpStore %v %10
+               OpReturn
+               OpFunctionEnd
diff --git a/test/expressions/zero_init/mat2x3/f32.wgsl.expected.wgsl b/test/expressions/zero_init/mat2x3/f32.wgsl.expected.wgsl
new file mode 100644
index 0000000..8dcb021
--- /dev/null
+++ b/test/expressions/zero_init/mat2x3/f32.wgsl.expected.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+  var v = mat2x3<f32>();
+}
diff --git a/test/expressions/zero_init/mat2x4/f32.wgsl b/test/expressions/zero_init/mat2x4/f32.wgsl
new file mode 100644
index 0000000..69ceaf6
--- /dev/null
+++ b/test/expressions/zero_init/mat2x4/f32.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+    var v = mat2x4<f32>();
+}
diff --git a/test/expressions/zero_init/mat2x4/f32.wgsl.expected.hlsl b/test/expressions/zero_init/mat2x4/f32.wgsl.expected.hlsl
new file mode 100644
index 0000000..fee298a
--- /dev/null
+++ b/test/expressions/zero_init/mat2x4/f32.wgsl.expected.hlsl
@@ -0,0 +1,8 @@
+[numthreads(1, 1, 1)]
+void unused_entry_point() {
+  return;
+}
+
+void f() {
+  float2x4 v = float2x4(0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f);
+}
diff --git a/test/expressions/zero_init/mat2x4/f32.wgsl.expected.msl b/test/expressions/zero_init/mat2x4/f32.wgsl.expected.msl
new file mode 100644
index 0000000..07088be
--- /dev/null
+++ b/test/expressions/zero_init/mat2x4/f32.wgsl.expected.msl
@@ -0,0 +1,7 @@
+#include <metal_stdlib>
+
+using namespace metal;
+void f() {
+  float2x4 v = float2x4();
+}
+
diff --git a/test/expressions/zero_init/mat2x4/f32.wgsl.expected.spvasm b/test/expressions/zero_init/mat2x4/f32.wgsl.expected.spvasm
new file mode 100644
index 0000000..1f91357
--- /dev/null
+++ b/test/expressions/zero_init/mat2x4/f32.wgsl.expected.spvasm
@@ -0,0 +1,29 @@
+; SPIR-V
+; Version: 1.3
+; Generator: Google Tint Compiler; 0
+; Bound: 13
+; Schema: 0
+               OpCapability Shader
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint GLCompute %unused_entry_point "unused_entry_point"
+               OpExecutionMode %unused_entry_point LocalSize 1 1 1
+               OpName %unused_entry_point "unused_entry_point"
+               OpName %f "f"
+               OpName %v "v"
+       %void = OpTypeVoid
+          %1 = OpTypeFunction %void
+      %float = OpTypeFloat 32
+    %v4float = OpTypeVector %float 4
+%mat2v4float = OpTypeMatrix %v4float 2
+         %10 = OpConstantNull %mat2v4float
+%_ptr_Function_mat2v4float = OpTypePointer Function %mat2v4float
+%unused_entry_point = OpFunction %void None %1
+          %4 = OpLabel
+               OpReturn
+               OpFunctionEnd
+          %f = OpFunction %void None %1
+          %6 = OpLabel
+          %v = OpVariable %_ptr_Function_mat2v4float Function %10
+               OpStore %v %10
+               OpReturn
+               OpFunctionEnd
diff --git a/test/expressions/zero_init/mat2x4/f32.wgsl.expected.wgsl b/test/expressions/zero_init/mat2x4/f32.wgsl.expected.wgsl
new file mode 100644
index 0000000..16c89e0
--- /dev/null
+++ b/test/expressions/zero_init/mat2x4/f32.wgsl.expected.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+  var v = mat2x4<f32>();
+}
diff --git a/test/expressions/zero_init/mat3x2/f32.wgsl b/test/expressions/zero_init/mat3x2/f32.wgsl
new file mode 100644
index 0000000..8b5d3ab
--- /dev/null
+++ b/test/expressions/zero_init/mat3x2/f32.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+    var v = mat3x2<f32>();
+}
diff --git a/test/expressions/zero_init/mat3x2/f32.wgsl.expected.hlsl b/test/expressions/zero_init/mat3x2/f32.wgsl.expected.hlsl
new file mode 100644
index 0000000..69c6a43
--- /dev/null
+++ b/test/expressions/zero_init/mat3x2/f32.wgsl.expected.hlsl
@@ -0,0 +1,8 @@
+[numthreads(1, 1, 1)]
+void unused_entry_point() {
+  return;
+}
+
+void f() {
+  float3x2 v = float3x2(0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f);
+}
diff --git a/test/expressions/zero_init/mat3x2/f32.wgsl.expected.msl b/test/expressions/zero_init/mat3x2/f32.wgsl.expected.msl
new file mode 100644
index 0000000..8f611d2
--- /dev/null
+++ b/test/expressions/zero_init/mat3x2/f32.wgsl.expected.msl
@@ -0,0 +1,7 @@
+#include <metal_stdlib>
+
+using namespace metal;
+void f() {
+  float3x2 v = float3x2();
+}
+
diff --git a/test/expressions/zero_init/mat3x2/f32.wgsl.expected.spvasm b/test/expressions/zero_init/mat3x2/f32.wgsl.expected.spvasm
new file mode 100644
index 0000000..9e72aa8
--- /dev/null
+++ b/test/expressions/zero_init/mat3x2/f32.wgsl.expected.spvasm
@@ -0,0 +1,29 @@
+; SPIR-V
+; Version: 1.3
+; Generator: Google Tint Compiler; 0
+; Bound: 13
+; Schema: 0
+               OpCapability Shader
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint GLCompute %unused_entry_point "unused_entry_point"
+               OpExecutionMode %unused_entry_point LocalSize 1 1 1
+               OpName %unused_entry_point "unused_entry_point"
+               OpName %f "f"
+               OpName %v "v"
+       %void = OpTypeVoid
+          %1 = OpTypeFunction %void
+      %float = OpTypeFloat 32
+    %v2float = OpTypeVector %float 2
+%mat3v2float = OpTypeMatrix %v2float 3
+         %10 = OpConstantNull %mat3v2float
+%_ptr_Function_mat3v2float = OpTypePointer Function %mat3v2float
+%unused_entry_point = OpFunction %void None %1
+          %4 = OpLabel
+               OpReturn
+               OpFunctionEnd
+          %f = OpFunction %void None %1
+          %6 = OpLabel
+          %v = OpVariable %_ptr_Function_mat3v2float Function %10
+               OpStore %v %10
+               OpReturn
+               OpFunctionEnd
diff --git a/test/expressions/zero_init/mat3x2/f32.wgsl.expected.wgsl b/test/expressions/zero_init/mat3x2/f32.wgsl.expected.wgsl
new file mode 100644
index 0000000..4041b71
--- /dev/null
+++ b/test/expressions/zero_init/mat3x2/f32.wgsl.expected.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+  var v = mat3x2<f32>();
+}
diff --git a/test/expressions/zero_init/mat3x3/f32.wgsl b/test/expressions/zero_init/mat3x3/f32.wgsl
new file mode 100644
index 0000000..f0b2c70
--- /dev/null
+++ b/test/expressions/zero_init/mat3x3/f32.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+    var v = mat3x3<f32>();
+}
diff --git a/test/expressions/zero_init/mat3x3/f32.wgsl.expected.hlsl b/test/expressions/zero_init/mat3x3/f32.wgsl.expected.hlsl
new file mode 100644
index 0000000..a75039f
--- /dev/null
+++ b/test/expressions/zero_init/mat3x3/f32.wgsl.expected.hlsl
@@ -0,0 +1,8 @@
+[numthreads(1, 1, 1)]
+void unused_entry_point() {
+  return;
+}
+
+void f() {
+  float3x3 v = float3x3(0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f);
+}
diff --git a/test/expressions/zero_init/mat3x3/f32.wgsl.expected.msl b/test/expressions/zero_init/mat3x3/f32.wgsl.expected.msl
new file mode 100644
index 0000000..46aa385
--- /dev/null
+++ b/test/expressions/zero_init/mat3x3/f32.wgsl.expected.msl
@@ -0,0 +1,7 @@
+#include <metal_stdlib>
+
+using namespace metal;
+void f() {
+  float3x3 v = float3x3();
+}
+
diff --git a/test/expressions/zero_init/mat3x3/f32.wgsl.expected.spvasm b/test/expressions/zero_init/mat3x3/f32.wgsl.expected.spvasm
new file mode 100644
index 0000000..10c69db
--- /dev/null
+++ b/test/expressions/zero_init/mat3x3/f32.wgsl.expected.spvasm
@@ -0,0 +1,29 @@
+; SPIR-V
+; Version: 1.3
+; Generator: Google Tint Compiler; 0
+; Bound: 13
+; Schema: 0
+               OpCapability Shader
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint GLCompute %unused_entry_point "unused_entry_point"
+               OpExecutionMode %unused_entry_point LocalSize 1 1 1
+               OpName %unused_entry_point "unused_entry_point"
+               OpName %f "f"
+               OpName %v "v"
+       %void = OpTypeVoid
+          %1 = OpTypeFunction %void
+      %float = OpTypeFloat 32
+    %v3float = OpTypeVector %float 3
+%mat3v3float = OpTypeMatrix %v3float 3
+         %10 = OpConstantNull %mat3v3float
+%_ptr_Function_mat3v3float = OpTypePointer Function %mat3v3float
+%unused_entry_point = OpFunction %void None %1
+          %4 = OpLabel
+               OpReturn
+               OpFunctionEnd
+          %f = OpFunction %void None %1
+          %6 = OpLabel
+          %v = OpVariable %_ptr_Function_mat3v3float Function %10
+               OpStore %v %10
+               OpReturn
+               OpFunctionEnd
diff --git a/test/expressions/zero_init/mat3x3/f32.wgsl.expected.wgsl b/test/expressions/zero_init/mat3x3/f32.wgsl.expected.wgsl
new file mode 100644
index 0000000..366671c
--- /dev/null
+++ b/test/expressions/zero_init/mat3x3/f32.wgsl.expected.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+  var v = mat3x3<f32>();
+}
diff --git a/test/expressions/zero_init/mat3x4/f32.wgsl b/test/expressions/zero_init/mat3x4/f32.wgsl
new file mode 100644
index 0000000..8757041
--- /dev/null
+++ b/test/expressions/zero_init/mat3x4/f32.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+    var v = mat3x4<f32>();
+}
diff --git a/test/expressions/zero_init/mat3x4/f32.wgsl.expected.hlsl b/test/expressions/zero_init/mat3x4/f32.wgsl.expected.hlsl
new file mode 100644
index 0000000..2b08d5f
--- /dev/null
+++ b/test/expressions/zero_init/mat3x4/f32.wgsl.expected.hlsl
@@ -0,0 +1,8 @@
+[numthreads(1, 1, 1)]
+void unused_entry_point() {
+  return;
+}
+
+void f() {
+  float3x4 v = float3x4(0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f);
+}
diff --git a/test/expressions/zero_init/mat3x4/f32.wgsl.expected.msl b/test/expressions/zero_init/mat3x4/f32.wgsl.expected.msl
new file mode 100644
index 0000000..21f15d0
--- /dev/null
+++ b/test/expressions/zero_init/mat3x4/f32.wgsl.expected.msl
@@ -0,0 +1,7 @@
+#include <metal_stdlib>
+
+using namespace metal;
+void f() {
+  float3x4 v = float3x4();
+}
+
diff --git a/test/expressions/zero_init/mat3x4/f32.wgsl.expected.spvasm b/test/expressions/zero_init/mat3x4/f32.wgsl.expected.spvasm
new file mode 100644
index 0000000..8e00da5
--- /dev/null
+++ b/test/expressions/zero_init/mat3x4/f32.wgsl.expected.spvasm
@@ -0,0 +1,29 @@
+; SPIR-V
+; Version: 1.3
+; Generator: Google Tint Compiler; 0
+; Bound: 13
+; Schema: 0
+               OpCapability Shader
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint GLCompute %unused_entry_point "unused_entry_point"
+               OpExecutionMode %unused_entry_point LocalSize 1 1 1
+               OpName %unused_entry_point "unused_entry_point"
+               OpName %f "f"
+               OpName %v "v"
+       %void = OpTypeVoid
+          %1 = OpTypeFunction %void
+      %float = OpTypeFloat 32
+    %v4float = OpTypeVector %float 4
+%mat3v4float = OpTypeMatrix %v4float 3
+         %10 = OpConstantNull %mat3v4float
+%_ptr_Function_mat3v4float = OpTypePointer Function %mat3v4float
+%unused_entry_point = OpFunction %void None %1
+          %4 = OpLabel
+               OpReturn
+               OpFunctionEnd
+          %f = OpFunction %void None %1
+          %6 = OpLabel
+          %v = OpVariable %_ptr_Function_mat3v4float Function %10
+               OpStore %v %10
+               OpReturn
+               OpFunctionEnd
diff --git a/test/expressions/zero_init/mat3x4/f32.wgsl.expected.wgsl b/test/expressions/zero_init/mat3x4/f32.wgsl.expected.wgsl
new file mode 100644
index 0000000..d286020
--- /dev/null
+++ b/test/expressions/zero_init/mat3x4/f32.wgsl.expected.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+  var v = mat3x4<f32>();
+}
diff --git a/test/expressions/zero_init/mat4x2/f32.wgsl b/test/expressions/zero_init/mat4x2/f32.wgsl
new file mode 100644
index 0000000..0b47e40
--- /dev/null
+++ b/test/expressions/zero_init/mat4x2/f32.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+    var v = mat4x2<f32>();
+}
diff --git a/test/expressions/zero_init/mat4x2/f32.wgsl.expected.hlsl b/test/expressions/zero_init/mat4x2/f32.wgsl.expected.hlsl
new file mode 100644
index 0000000..ceba05a
--- /dev/null
+++ b/test/expressions/zero_init/mat4x2/f32.wgsl.expected.hlsl
@@ -0,0 +1,8 @@
+[numthreads(1, 1, 1)]
+void unused_entry_point() {
+  return;
+}
+
+void f() {
+  float4x2 v = float4x2(0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f);
+}
diff --git a/test/expressions/zero_init/mat4x2/f32.wgsl.expected.msl b/test/expressions/zero_init/mat4x2/f32.wgsl.expected.msl
new file mode 100644
index 0000000..5c2410f
--- /dev/null
+++ b/test/expressions/zero_init/mat4x2/f32.wgsl.expected.msl
@@ -0,0 +1,7 @@
+#include <metal_stdlib>
+
+using namespace metal;
+void f() {
+  float4x2 v = float4x2();
+}
+
diff --git a/test/expressions/zero_init/mat4x2/f32.wgsl.expected.spvasm b/test/expressions/zero_init/mat4x2/f32.wgsl.expected.spvasm
new file mode 100644
index 0000000..bc0a3a3
--- /dev/null
+++ b/test/expressions/zero_init/mat4x2/f32.wgsl.expected.spvasm
@@ -0,0 +1,29 @@
+; SPIR-V
+; Version: 1.3
+; Generator: Google Tint Compiler; 0
+; Bound: 13
+; Schema: 0
+               OpCapability Shader
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint GLCompute %unused_entry_point "unused_entry_point"
+               OpExecutionMode %unused_entry_point LocalSize 1 1 1
+               OpName %unused_entry_point "unused_entry_point"
+               OpName %f "f"
+               OpName %v "v"
+       %void = OpTypeVoid
+          %1 = OpTypeFunction %void
+      %float = OpTypeFloat 32
+    %v2float = OpTypeVector %float 2
+%mat4v2float = OpTypeMatrix %v2float 4
+         %10 = OpConstantNull %mat4v2float
+%_ptr_Function_mat4v2float = OpTypePointer Function %mat4v2float
+%unused_entry_point = OpFunction %void None %1
+          %4 = OpLabel
+               OpReturn
+               OpFunctionEnd
+          %f = OpFunction %void None %1
+          %6 = OpLabel
+          %v = OpVariable %_ptr_Function_mat4v2float Function %10
+               OpStore %v %10
+               OpReturn
+               OpFunctionEnd
diff --git a/test/expressions/zero_init/mat4x2/f32.wgsl.expected.wgsl b/test/expressions/zero_init/mat4x2/f32.wgsl.expected.wgsl
new file mode 100644
index 0000000..c88d768
--- /dev/null
+++ b/test/expressions/zero_init/mat4x2/f32.wgsl.expected.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+  var v = mat4x2<f32>();
+}
diff --git a/test/expressions/zero_init/mat4x3/f32.wgsl b/test/expressions/zero_init/mat4x3/f32.wgsl
new file mode 100644
index 0000000..532ed37
--- /dev/null
+++ b/test/expressions/zero_init/mat4x3/f32.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+    var v = mat4x3<f32>();
+}
diff --git a/test/expressions/zero_init/mat4x3/f32.wgsl.expected.hlsl b/test/expressions/zero_init/mat4x3/f32.wgsl.expected.hlsl
new file mode 100644
index 0000000..6b43a16
--- /dev/null
+++ b/test/expressions/zero_init/mat4x3/f32.wgsl.expected.hlsl
@@ -0,0 +1,8 @@
+[numthreads(1, 1, 1)]
+void unused_entry_point() {
+  return;
+}
+
+void f() {
+  float4x3 v = float4x3(0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f);
+}
diff --git a/test/expressions/zero_init/mat4x3/f32.wgsl.expected.msl b/test/expressions/zero_init/mat4x3/f32.wgsl.expected.msl
new file mode 100644
index 0000000..80c8b94
--- /dev/null
+++ b/test/expressions/zero_init/mat4x3/f32.wgsl.expected.msl
@@ -0,0 +1,7 @@
+#include <metal_stdlib>
+
+using namespace metal;
+void f() {
+  float4x3 v = float4x3();
+}
+
diff --git a/test/expressions/zero_init/mat4x3/f32.wgsl.expected.spvasm b/test/expressions/zero_init/mat4x3/f32.wgsl.expected.spvasm
new file mode 100644
index 0000000..ca6300d
--- /dev/null
+++ b/test/expressions/zero_init/mat4x3/f32.wgsl.expected.spvasm
@@ -0,0 +1,29 @@
+; SPIR-V
+; Version: 1.3
+; Generator: Google Tint Compiler; 0
+; Bound: 13
+; Schema: 0
+               OpCapability Shader
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint GLCompute %unused_entry_point "unused_entry_point"
+               OpExecutionMode %unused_entry_point LocalSize 1 1 1
+               OpName %unused_entry_point "unused_entry_point"
+               OpName %f "f"
+               OpName %v "v"
+       %void = OpTypeVoid
+          %1 = OpTypeFunction %void
+      %float = OpTypeFloat 32
+    %v3float = OpTypeVector %float 3
+%mat4v3float = OpTypeMatrix %v3float 4
+         %10 = OpConstantNull %mat4v3float
+%_ptr_Function_mat4v3float = OpTypePointer Function %mat4v3float
+%unused_entry_point = OpFunction %void None %1
+          %4 = OpLabel
+               OpReturn
+               OpFunctionEnd
+          %f = OpFunction %void None %1
+          %6 = OpLabel
+          %v = OpVariable %_ptr_Function_mat4v3float Function %10
+               OpStore %v %10
+               OpReturn
+               OpFunctionEnd
diff --git a/test/expressions/zero_init/mat4x3/f32.wgsl.expected.wgsl b/test/expressions/zero_init/mat4x3/f32.wgsl.expected.wgsl
new file mode 100644
index 0000000..479de8e
--- /dev/null
+++ b/test/expressions/zero_init/mat4x3/f32.wgsl.expected.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+  var v = mat4x3<f32>();
+}
diff --git a/test/expressions/zero_init/mat4x4/f32.wgsl b/test/expressions/zero_init/mat4x4/f32.wgsl
new file mode 100644
index 0000000..158a927
--- /dev/null
+++ b/test/expressions/zero_init/mat4x4/f32.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+    var v = mat4x4<f32>();
+}
diff --git a/test/expressions/zero_init/mat4x4/f32.wgsl.expected.hlsl b/test/expressions/zero_init/mat4x4/f32.wgsl.expected.hlsl
new file mode 100644
index 0000000..72825c9
--- /dev/null
+++ b/test/expressions/zero_init/mat4x4/f32.wgsl.expected.hlsl
@@ -0,0 +1,8 @@
+[numthreads(1, 1, 1)]
+void unused_entry_point() {
+  return;
+}
+
+void f() {
+  float4x4 v = float4x4(0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f);
+}
diff --git a/test/expressions/zero_init/mat4x4/f32.wgsl.expected.msl b/test/expressions/zero_init/mat4x4/f32.wgsl.expected.msl
new file mode 100644
index 0000000..9b2c252
--- /dev/null
+++ b/test/expressions/zero_init/mat4x4/f32.wgsl.expected.msl
@@ -0,0 +1,7 @@
+#include <metal_stdlib>
+
+using namespace metal;
+void f() {
+  float4x4 v = float4x4();
+}
+
diff --git a/test/expressions/zero_init/mat4x4/f32.wgsl.expected.spvasm b/test/expressions/zero_init/mat4x4/f32.wgsl.expected.spvasm
new file mode 100644
index 0000000..f156dd2
--- /dev/null
+++ b/test/expressions/zero_init/mat4x4/f32.wgsl.expected.spvasm
@@ -0,0 +1,29 @@
+; SPIR-V
+; Version: 1.3
+; Generator: Google Tint Compiler; 0
+; Bound: 13
+; Schema: 0
+               OpCapability Shader
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint GLCompute %unused_entry_point "unused_entry_point"
+               OpExecutionMode %unused_entry_point LocalSize 1 1 1
+               OpName %unused_entry_point "unused_entry_point"
+               OpName %f "f"
+               OpName %v "v"
+       %void = OpTypeVoid
+          %1 = OpTypeFunction %void
+      %float = OpTypeFloat 32
+    %v4float = OpTypeVector %float 4
+%mat4v4float = OpTypeMatrix %v4float 4
+         %10 = OpConstantNull %mat4v4float
+%_ptr_Function_mat4v4float = OpTypePointer Function %mat4v4float
+%unused_entry_point = OpFunction %void None %1
+          %4 = OpLabel
+               OpReturn
+               OpFunctionEnd
+          %f = OpFunction %void None %1
+          %6 = OpLabel
+          %v = OpVariable %_ptr_Function_mat4v4float Function %10
+               OpStore %v %10
+               OpReturn
+               OpFunctionEnd
diff --git a/test/expressions/zero_init/mat4x4/f32.wgsl.expected.wgsl b/test/expressions/zero_init/mat4x4/f32.wgsl.expected.wgsl
new file mode 100644
index 0000000..b26a979
--- /dev/null
+++ b/test/expressions/zero_init/mat4x4/f32.wgsl.expected.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+  var v = mat4x4<f32>();
+}
diff --git a/test/expressions/zero_init/scalar/bool.wgsl b/test/expressions/zero_init/scalar/bool.wgsl
new file mode 100644
index 0000000..8766ac5
--- /dev/null
+++ b/test/expressions/zero_init/scalar/bool.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+    var v = bool();
+}
diff --git a/test/expressions/zero_init/scalar/bool.wgsl.expected.hlsl b/test/expressions/zero_init/scalar/bool.wgsl.expected.hlsl
new file mode 100644
index 0000000..e3a07b6
--- /dev/null
+++ b/test/expressions/zero_init/scalar/bool.wgsl.expected.hlsl
@@ -0,0 +1,8 @@
+[numthreads(1, 1, 1)]
+void unused_entry_point() {
+  return;
+}
+
+void f() {
+  bool v = false;
+}
diff --git a/test/expressions/zero_init/scalar/bool.wgsl.expected.msl b/test/expressions/zero_init/scalar/bool.wgsl.expected.msl
new file mode 100644
index 0000000..a68d88c
--- /dev/null
+++ b/test/expressions/zero_init/scalar/bool.wgsl.expected.msl
@@ -0,0 +1,7 @@
+#include <metal_stdlib>
+
+using namespace metal;
+void f() {
+  bool v = bool();
+}
+
diff --git a/test/expressions/zero_init/scalar/bool.wgsl.expected.spvasm b/test/expressions/zero_init/scalar/bool.wgsl.expected.spvasm
new file mode 100644
index 0000000..396811b
--- /dev/null
+++ b/test/expressions/zero_init/scalar/bool.wgsl.expected.spvasm
@@ -0,0 +1,27 @@
+; SPIR-V
+; Version: 1.3
+; Generator: Google Tint Compiler; 0
+; Bound: 11
+; Schema: 0
+               OpCapability Shader
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint GLCompute %unused_entry_point "unused_entry_point"
+               OpExecutionMode %unused_entry_point LocalSize 1 1 1
+               OpName %unused_entry_point "unused_entry_point"
+               OpName %f "f"
+               OpName %v "v"
+       %void = OpTypeVoid
+          %1 = OpTypeFunction %void
+       %bool = OpTypeBool
+          %8 = OpConstantNull %bool
+%_ptr_Function_bool = OpTypePointer Function %bool
+%unused_entry_point = OpFunction %void None %1
+          %4 = OpLabel
+               OpReturn
+               OpFunctionEnd
+          %f = OpFunction %void None %1
+          %6 = OpLabel
+          %v = OpVariable %_ptr_Function_bool Function %8
+               OpStore %v %8
+               OpReturn
+               OpFunctionEnd
diff --git a/test/expressions/zero_init/scalar/bool.wgsl.expected.wgsl b/test/expressions/zero_init/scalar/bool.wgsl.expected.wgsl
new file mode 100644
index 0000000..146584d
--- /dev/null
+++ b/test/expressions/zero_init/scalar/bool.wgsl.expected.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+  var v = bool();
+}
diff --git a/test/expressions/zero_init/scalar/f32.wgsl b/test/expressions/zero_init/scalar/f32.wgsl
new file mode 100644
index 0000000..e8ed35f
--- /dev/null
+++ b/test/expressions/zero_init/scalar/f32.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+    var v = f32();
+}
diff --git a/test/expressions/zero_init/scalar/f32.wgsl.expected.hlsl b/test/expressions/zero_init/scalar/f32.wgsl.expected.hlsl
new file mode 100644
index 0000000..ed23c73
--- /dev/null
+++ b/test/expressions/zero_init/scalar/f32.wgsl.expected.hlsl
@@ -0,0 +1,8 @@
+[numthreads(1, 1, 1)]
+void unused_entry_point() {
+  return;
+}
+
+void f() {
+  float v = 0.0f;
+}
diff --git a/test/expressions/zero_init/scalar/f32.wgsl.expected.msl b/test/expressions/zero_init/scalar/f32.wgsl.expected.msl
new file mode 100644
index 0000000..7e8266e
--- /dev/null
+++ b/test/expressions/zero_init/scalar/f32.wgsl.expected.msl
@@ -0,0 +1,7 @@
+#include <metal_stdlib>
+
+using namespace metal;
+void f() {
+  float v = float();
+}
+
diff --git a/test/expressions/zero_init/scalar/f32.wgsl.expected.spvasm b/test/expressions/zero_init/scalar/f32.wgsl.expected.spvasm
new file mode 100644
index 0000000..dac0101
--- /dev/null
+++ b/test/expressions/zero_init/scalar/f32.wgsl.expected.spvasm
@@ -0,0 +1,27 @@
+; SPIR-V
+; Version: 1.3
+; Generator: Google Tint Compiler; 0
+; Bound: 11
+; Schema: 0
+               OpCapability Shader
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint GLCompute %unused_entry_point "unused_entry_point"
+               OpExecutionMode %unused_entry_point LocalSize 1 1 1
+               OpName %unused_entry_point "unused_entry_point"
+               OpName %f "f"
+               OpName %v "v"
+       %void = OpTypeVoid
+          %1 = OpTypeFunction %void
+      %float = OpTypeFloat 32
+          %8 = OpConstantNull %float
+%_ptr_Function_float = OpTypePointer Function %float
+%unused_entry_point = OpFunction %void None %1
+          %4 = OpLabel
+               OpReturn
+               OpFunctionEnd
+          %f = OpFunction %void None %1
+          %6 = OpLabel
+          %v = OpVariable %_ptr_Function_float Function %8
+               OpStore %v %8
+               OpReturn
+               OpFunctionEnd
diff --git a/test/expressions/zero_init/scalar/f32.wgsl.expected.wgsl b/test/expressions/zero_init/scalar/f32.wgsl.expected.wgsl
new file mode 100644
index 0000000..b72e28d
--- /dev/null
+++ b/test/expressions/zero_init/scalar/f32.wgsl.expected.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+  var v = f32();
+}
diff --git a/test/expressions/zero_init/scalar/i32.wgsl b/test/expressions/zero_init/scalar/i32.wgsl
new file mode 100644
index 0000000..de560ef
--- /dev/null
+++ b/test/expressions/zero_init/scalar/i32.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+    var v = i32();
+}
diff --git a/test/expressions/zero_init/scalar/i32.wgsl.expected.hlsl b/test/expressions/zero_init/scalar/i32.wgsl.expected.hlsl
new file mode 100644
index 0000000..dd9b566
--- /dev/null
+++ b/test/expressions/zero_init/scalar/i32.wgsl.expected.hlsl
@@ -0,0 +1,8 @@
+[numthreads(1, 1, 1)]
+void unused_entry_point() {
+  return;
+}
+
+void f() {
+  int v = 0;
+}
diff --git a/test/expressions/zero_init/scalar/i32.wgsl.expected.msl b/test/expressions/zero_init/scalar/i32.wgsl.expected.msl
new file mode 100644
index 0000000..222df20
--- /dev/null
+++ b/test/expressions/zero_init/scalar/i32.wgsl.expected.msl
@@ -0,0 +1,7 @@
+#include <metal_stdlib>
+
+using namespace metal;
+void f() {
+  int v = int();
+}
+
diff --git a/test/expressions/zero_init/scalar/i32.wgsl.expected.spvasm b/test/expressions/zero_init/scalar/i32.wgsl.expected.spvasm
new file mode 100644
index 0000000..f2b78bd
--- /dev/null
+++ b/test/expressions/zero_init/scalar/i32.wgsl.expected.spvasm
@@ -0,0 +1,27 @@
+; SPIR-V
+; Version: 1.3
+; Generator: Google Tint Compiler; 0
+; Bound: 11
+; Schema: 0
+               OpCapability Shader
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint GLCompute %unused_entry_point "unused_entry_point"
+               OpExecutionMode %unused_entry_point LocalSize 1 1 1
+               OpName %unused_entry_point "unused_entry_point"
+               OpName %f "f"
+               OpName %v "v"
+       %void = OpTypeVoid
+          %1 = OpTypeFunction %void
+        %int = OpTypeInt 32 1
+          %8 = OpConstantNull %int
+%_ptr_Function_int = OpTypePointer Function %int
+%unused_entry_point = OpFunction %void None %1
+          %4 = OpLabel
+               OpReturn
+               OpFunctionEnd
+          %f = OpFunction %void None %1
+          %6 = OpLabel
+          %v = OpVariable %_ptr_Function_int Function %8
+               OpStore %v %8
+               OpReturn
+               OpFunctionEnd
diff --git a/test/expressions/zero_init/scalar/i32.wgsl.expected.wgsl b/test/expressions/zero_init/scalar/i32.wgsl.expected.wgsl
new file mode 100644
index 0000000..6b5c0a0
--- /dev/null
+++ b/test/expressions/zero_init/scalar/i32.wgsl.expected.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+  var v = i32();
+}
diff --git a/test/expressions/zero_init/scalar/u32.wgsl b/test/expressions/zero_init/scalar/u32.wgsl
new file mode 100644
index 0000000..bec78d6
--- /dev/null
+++ b/test/expressions/zero_init/scalar/u32.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+    var v = u32();
+}
diff --git a/test/expressions/zero_init/scalar/u32.wgsl.expected.hlsl b/test/expressions/zero_init/scalar/u32.wgsl.expected.hlsl
new file mode 100644
index 0000000..58f3b9a
--- /dev/null
+++ b/test/expressions/zero_init/scalar/u32.wgsl.expected.hlsl
@@ -0,0 +1,8 @@
+[numthreads(1, 1, 1)]
+void unused_entry_point() {
+  return;
+}
+
+void f() {
+  uint v = 0u;
+}
diff --git a/test/expressions/zero_init/scalar/u32.wgsl.expected.msl b/test/expressions/zero_init/scalar/u32.wgsl.expected.msl
new file mode 100644
index 0000000..e11e857
--- /dev/null
+++ b/test/expressions/zero_init/scalar/u32.wgsl.expected.msl
@@ -0,0 +1,7 @@
+#include <metal_stdlib>
+
+using namespace metal;
+void f() {
+  uint v = uint();
+}
+
diff --git a/test/expressions/zero_init/scalar/u32.wgsl.expected.spvasm b/test/expressions/zero_init/scalar/u32.wgsl.expected.spvasm
new file mode 100644
index 0000000..83252c5
--- /dev/null
+++ b/test/expressions/zero_init/scalar/u32.wgsl.expected.spvasm
@@ -0,0 +1,27 @@
+; SPIR-V
+; Version: 1.3
+; Generator: Google Tint Compiler; 0
+; Bound: 11
+; Schema: 0
+               OpCapability Shader
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint GLCompute %unused_entry_point "unused_entry_point"
+               OpExecutionMode %unused_entry_point LocalSize 1 1 1
+               OpName %unused_entry_point "unused_entry_point"
+               OpName %f "f"
+               OpName %v "v"
+       %void = OpTypeVoid
+          %1 = OpTypeFunction %void
+       %uint = OpTypeInt 32 0
+          %8 = OpConstantNull %uint
+%_ptr_Function_uint = OpTypePointer Function %uint
+%unused_entry_point = OpFunction %void None %1
+          %4 = OpLabel
+               OpReturn
+               OpFunctionEnd
+          %f = OpFunction %void None %1
+          %6 = OpLabel
+          %v = OpVariable %_ptr_Function_uint Function %8
+               OpStore %v %8
+               OpReturn
+               OpFunctionEnd
diff --git a/test/expressions/zero_init/scalar/u32.wgsl.expected.wgsl b/test/expressions/zero_init/scalar/u32.wgsl.expected.wgsl
new file mode 100644
index 0000000..4e3fd82
--- /dev/null
+++ b/test/expressions/zero_init/scalar/u32.wgsl.expected.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+  var v = u32();
+}
diff --git a/test/expressions/zero_init/struct/array.wgsl b/test/expressions/zero_init/struct/array.wgsl
new file mode 100644
index 0000000..148b457
--- /dev/null
+++ b/test/expressions/zero_init/struct/array.wgsl
@@ -0,0 +1,7 @@
+struct S {
+    a : array<f32, 4>;
+};
+
+fn f() {
+    var v = S();
+}
diff --git a/test/expressions/zero_init/struct/array.wgsl.expected.hlsl b/test/expressions/zero_init/struct/array.wgsl.expected.hlsl
new file mode 100644
index 0000000..6bb77c6
--- /dev/null
+++ b/test/expressions/zero_init/struct/array.wgsl.expected.hlsl
@@ -0,0 +1,15 @@
+[numthreads(1, 1, 1)]
+void unused_entry_point() {
+  return;
+}
+
+struct tint_array_wrapper {
+  float arr[4];
+};
+struct S {
+  tint_array_wrapper a;
+};
+
+void f() {
+  S v = {{{0.0f, 0.0f, 0.0f, 0.0f}}};
+}
diff --git a/test/expressions/zero_init/struct/array.wgsl.expected.msl b/test/expressions/zero_init/struct/array.wgsl.expected.msl
new file mode 100644
index 0000000..61b9dc1
--- /dev/null
+++ b/test/expressions/zero_init/struct/array.wgsl.expected.msl
@@ -0,0 +1,14 @@
+#include <metal_stdlib>
+
+using namespace metal;
+struct tint_array_wrapper {
+  float arr[4];
+};
+struct S {
+  tint_array_wrapper a;
+};
+
+void f() {
+  S v = {};
+}
+
diff --git a/test/expressions/zero_init/struct/array.wgsl.expected.spvasm b/test/expressions/zero_init/struct/array.wgsl.expected.spvasm
new file mode 100644
index 0000000..bb96631
--- /dev/null
+++ b/test/expressions/zero_init/struct/array.wgsl.expected.spvasm
@@ -0,0 +1,35 @@
+; SPIR-V
+; Version: 1.3
+; Generator: Google Tint Compiler; 0
+; Bound: 15
+; Schema: 0
+               OpCapability Shader
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint GLCompute %unused_entry_point "unused_entry_point"
+               OpExecutionMode %unused_entry_point LocalSize 1 1 1
+               OpName %unused_entry_point "unused_entry_point"
+               OpName %f "f"
+               OpName %S "S"
+               OpMemberName %S 0 "a"
+               OpName %v "v"
+               OpMemberDecorate %S 0 Offset 0
+               OpDecorate %_arr_float_uint_4 ArrayStride 4
+       %void = OpTypeVoid
+          %1 = OpTypeFunction %void
+      %float = OpTypeFloat 32
+       %uint = OpTypeInt 32 0
+     %uint_4 = OpConstant %uint 4
+%_arr_float_uint_4 = OpTypeArray %float %uint_4
+          %S = OpTypeStruct %_arr_float_uint_4
+         %12 = OpConstantNull %S
+%_ptr_Function_S = OpTypePointer Function %S
+%unused_entry_point = OpFunction %void None %1
+          %4 = OpLabel
+               OpReturn
+               OpFunctionEnd
+          %f = OpFunction %void None %1
+          %6 = OpLabel
+          %v = OpVariable %_ptr_Function_S Function %12
+               OpStore %v %12
+               OpReturn
+               OpFunctionEnd
diff --git a/test/expressions/zero_init/struct/array.wgsl.expected.wgsl b/test/expressions/zero_init/struct/array.wgsl.expected.wgsl
new file mode 100644
index 0000000..522939f
--- /dev/null
+++ b/test/expressions/zero_init/struct/array.wgsl.expected.wgsl
@@ -0,0 +1,7 @@
+struct S {
+  a : array<f32, 4>;
+};
+
+fn f() {
+  var v = S();
+}
diff --git a/test/expressions/zero_init/struct/scalar.wgsl b/test/expressions/zero_init/struct/scalar.wgsl
new file mode 100644
index 0000000..a1c58b3
--- /dev/null
+++ b/test/expressions/zero_init/struct/scalar.wgsl
@@ -0,0 +1,10 @@
+struct S {
+    i : i32;
+    u : u32;
+    f : f32;
+    b : bool;
+};
+
+fn f() {
+    var v = S();
+}
diff --git a/test/expressions/zero_init/struct/scalar.wgsl.expected.hlsl b/test/expressions/zero_init/struct/scalar.wgsl.expected.hlsl
new file mode 100644
index 0000000..29925ff
--- /dev/null
+++ b/test/expressions/zero_init/struct/scalar.wgsl.expected.hlsl
@@ -0,0 +1,15 @@
+[numthreads(1, 1, 1)]
+void unused_entry_point() {
+  return;
+}
+
+struct S {
+  int i;
+  uint u;
+  float f;
+  bool b;
+};
+
+void f() {
+  S v = {0, 0u, 0.0f, false};
+}
diff --git a/test/expressions/zero_init/struct/scalar.wgsl.expected.msl b/test/expressions/zero_init/struct/scalar.wgsl.expected.msl
new file mode 100644
index 0000000..b72ea5e
--- /dev/null
+++ b/test/expressions/zero_init/struct/scalar.wgsl.expected.msl
@@ -0,0 +1,14 @@
+#include <metal_stdlib>
+
+using namespace metal;
+struct S {
+  int i;
+  uint u;
+  float f;
+  bool b;
+};
+
+void f() {
+  S v = {};
+}
+
diff --git a/test/expressions/zero_init/struct/scalar.wgsl.expected.spvasm b/test/expressions/zero_init/struct/scalar.wgsl.expected.spvasm
new file mode 100644
index 0000000..1990f38
--- /dev/null
+++ b/test/expressions/zero_init/struct/scalar.wgsl.expected.spvasm
@@ -0,0 +1,40 @@
+; SPIR-V
+; Version: 1.3
+; Generator: Google Tint Compiler; 0
+; Bound: 15
+; Schema: 0
+               OpCapability Shader
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint GLCompute %unused_entry_point "unused_entry_point"
+               OpExecutionMode %unused_entry_point LocalSize 1 1 1
+               OpName %unused_entry_point "unused_entry_point"
+               OpName %f "f"
+               OpName %S "S"
+               OpMemberName %S 0 "i"
+               OpMemberName %S 1 "u"
+               OpMemberName %S 2 "f"
+               OpMemberName %S 3 "b"
+               OpName %v "v"
+               OpMemberDecorate %S 0 Offset 0
+               OpMemberDecorate %S 1 Offset 4
+               OpMemberDecorate %S 2 Offset 8
+               OpMemberDecorate %S 3 Offset 12
+       %void = OpTypeVoid
+          %1 = OpTypeFunction %void
+        %int = OpTypeInt 32 1
+       %uint = OpTypeInt 32 0
+      %float = OpTypeFloat 32
+       %bool = OpTypeBool
+          %S = OpTypeStruct %int %uint %float %bool
+         %12 = OpConstantNull %S
+%_ptr_Function_S = OpTypePointer Function %S
+%unused_entry_point = OpFunction %void None %1
+          %4 = OpLabel
+               OpReturn
+               OpFunctionEnd
+          %f = OpFunction %void None %1
+          %6 = OpLabel
+          %v = OpVariable %_ptr_Function_S Function %12
+               OpStore %v %12
+               OpReturn
+               OpFunctionEnd
diff --git a/test/expressions/zero_init/struct/scalar.wgsl.expected.wgsl b/test/expressions/zero_init/struct/scalar.wgsl.expected.wgsl
new file mode 100644
index 0000000..0da534f
--- /dev/null
+++ b/test/expressions/zero_init/struct/scalar.wgsl.expected.wgsl
@@ -0,0 +1,10 @@
+struct S {
+  i : i32;
+  u : u32;
+  f : f32;
+  b : bool;
+};
+
+fn f() {
+  var v = S();
+}
diff --git a/test/expressions/zero_init/vec2/bool.wgsl b/test/expressions/zero_init/vec2/bool.wgsl
new file mode 100644
index 0000000..3ae73b2
--- /dev/null
+++ b/test/expressions/zero_init/vec2/bool.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+    var v = vec2<bool>();
+}
diff --git a/test/expressions/zero_init/vec2/bool.wgsl.expected.hlsl b/test/expressions/zero_init/vec2/bool.wgsl.expected.hlsl
new file mode 100644
index 0000000..bad31eb
--- /dev/null
+++ b/test/expressions/zero_init/vec2/bool.wgsl.expected.hlsl
@@ -0,0 +1,8 @@
+[numthreads(1, 1, 1)]
+void unused_entry_point() {
+  return;
+}
+
+void f() {
+  bool2 v = bool2(false, false);
+}
diff --git a/test/expressions/zero_init/vec2/bool.wgsl.expected.msl b/test/expressions/zero_init/vec2/bool.wgsl.expected.msl
new file mode 100644
index 0000000..fd03aaf
--- /dev/null
+++ b/test/expressions/zero_init/vec2/bool.wgsl.expected.msl
@@ -0,0 +1,7 @@
+#include <metal_stdlib>
+
+using namespace metal;
+void f() {
+  bool2 v = bool2();
+}
+
diff --git a/test/expressions/zero_init/vec2/bool.wgsl.expected.spvasm b/test/expressions/zero_init/vec2/bool.wgsl.expected.spvasm
new file mode 100644
index 0000000..7ca8e25
--- /dev/null
+++ b/test/expressions/zero_init/vec2/bool.wgsl.expected.spvasm
@@ -0,0 +1,28 @@
+; SPIR-V
+; Version: 1.3
+; Generator: Google Tint Compiler; 0
+; Bound: 12
+; Schema: 0
+               OpCapability Shader
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint GLCompute %unused_entry_point "unused_entry_point"
+               OpExecutionMode %unused_entry_point LocalSize 1 1 1
+               OpName %unused_entry_point "unused_entry_point"
+               OpName %f "f"
+               OpName %v "v"
+       %void = OpTypeVoid
+          %1 = OpTypeFunction %void
+       %bool = OpTypeBool
+     %v2bool = OpTypeVector %bool 2
+          %9 = OpConstantNull %v2bool
+%_ptr_Function_v2bool = OpTypePointer Function %v2bool
+%unused_entry_point = OpFunction %void None %1
+          %4 = OpLabel
+               OpReturn
+               OpFunctionEnd
+          %f = OpFunction %void None %1
+          %6 = OpLabel
+          %v = OpVariable %_ptr_Function_v2bool Function %9
+               OpStore %v %9
+               OpReturn
+               OpFunctionEnd
diff --git a/test/expressions/zero_init/vec2/bool.wgsl.expected.wgsl b/test/expressions/zero_init/vec2/bool.wgsl.expected.wgsl
new file mode 100644
index 0000000..083160c
--- /dev/null
+++ b/test/expressions/zero_init/vec2/bool.wgsl.expected.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+  var v = vec2<bool>();
+}
diff --git a/test/expressions/zero_init/vec2/f32.wgsl b/test/expressions/zero_init/vec2/f32.wgsl
new file mode 100644
index 0000000..edb7398
--- /dev/null
+++ b/test/expressions/zero_init/vec2/f32.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+    var v = vec2<f32>();
+}
diff --git a/test/expressions/zero_init/vec2/f32.wgsl.expected.hlsl b/test/expressions/zero_init/vec2/f32.wgsl.expected.hlsl
new file mode 100644
index 0000000..45a2969d
--- /dev/null
+++ b/test/expressions/zero_init/vec2/f32.wgsl.expected.hlsl
@@ -0,0 +1,8 @@
+[numthreads(1, 1, 1)]
+void unused_entry_point() {
+  return;
+}
+
+void f() {
+  float2 v = float2(0.0f, 0.0f);
+}
diff --git a/test/expressions/zero_init/vec2/f32.wgsl.expected.msl b/test/expressions/zero_init/vec2/f32.wgsl.expected.msl
new file mode 100644
index 0000000..07013f1
--- /dev/null
+++ b/test/expressions/zero_init/vec2/f32.wgsl.expected.msl
@@ -0,0 +1,7 @@
+#include <metal_stdlib>
+
+using namespace metal;
+void f() {
+  float2 v = float2();
+}
+
diff --git a/test/expressions/zero_init/vec2/f32.wgsl.expected.spvasm b/test/expressions/zero_init/vec2/f32.wgsl.expected.spvasm
new file mode 100644
index 0000000..4c882b7
--- /dev/null
+++ b/test/expressions/zero_init/vec2/f32.wgsl.expected.spvasm
@@ -0,0 +1,28 @@
+; SPIR-V
+; Version: 1.3
+; Generator: Google Tint Compiler; 0
+; Bound: 12
+; Schema: 0
+               OpCapability Shader
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint GLCompute %unused_entry_point "unused_entry_point"
+               OpExecutionMode %unused_entry_point LocalSize 1 1 1
+               OpName %unused_entry_point "unused_entry_point"
+               OpName %f "f"
+               OpName %v "v"
+       %void = OpTypeVoid
+          %1 = OpTypeFunction %void
+      %float = OpTypeFloat 32
+    %v2float = OpTypeVector %float 2
+          %9 = OpConstantNull %v2float
+%_ptr_Function_v2float = OpTypePointer Function %v2float
+%unused_entry_point = OpFunction %void None %1
+          %4 = OpLabel
+               OpReturn
+               OpFunctionEnd
+          %f = OpFunction %void None %1
+          %6 = OpLabel
+          %v = OpVariable %_ptr_Function_v2float Function %9
+               OpStore %v %9
+               OpReturn
+               OpFunctionEnd
diff --git a/test/expressions/zero_init/vec2/f32.wgsl.expected.wgsl b/test/expressions/zero_init/vec2/f32.wgsl.expected.wgsl
new file mode 100644
index 0000000..fb17f6d
--- /dev/null
+++ b/test/expressions/zero_init/vec2/f32.wgsl.expected.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+  var v = vec2<f32>();
+}
diff --git a/test/expressions/zero_init/vec2/i32.wgsl b/test/expressions/zero_init/vec2/i32.wgsl
new file mode 100644
index 0000000..be800b3
--- /dev/null
+++ b/test/expressions/zero_init/vec2/i32.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+    var v = vec2<i32>();
+}
diff --git a/test/expressions/zero_init/vec2/i32.wgsl.expected.hlsl b/test/expressions/zero_init/vec2/i32.wgsl.expected.hlsl
new file mode 100644
index 0000000..8c92953
--- /dev/null
+++ b/test/expressions/zero_init/vec2/i32.wgsl.expected.hlsl
@@ -0,0 +1,8 @@
+[numthreads(1, 1, 1)]
+void unused_entry_point() {
+  return;
+}
+
+void f() {
+  int2 v = int2(0, 0);
+}
diff --git a/test/expressions/zero_init/vec2/i32.wgsl.expected.msl b/test/expressions/zero_init/vec2/i32.wgsl.expected.msl
new file mode 100644
index 0000000..d29f4d1
--- /dev/null
+++ b/test/expressions/zero_init/vec2/i32.wgsl.expected.msl
@@ -0,0 +1,7 @@
+#include <metal_stdlib>
+
+using namespace metal;
+void f() {
+  int2 v = int2();
+}
+
diff --git a/test/expressions/zero_init/vec2/i32.wgsl.expected.spvasm b/test/expressions/zero_init/vec2/i32.wgsl.expected.spvasm
new file mode 100644
index 0000000..c29deb5
--- /dev/null
+++ b/test/expressions/zero_init/vec2/i32.wgsl.expected.spvasm
@@ -0,0 +1,28 @@
+; SPIR-V
+; Version: 1.3
+; Generator: Google Tint Compiler; 0
+; Bound: 12
+; Schema: 0
+               OpCapability Shader
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint GLCompute %unused_entry_point "unused_entry_point"
+               OpExecutionMode %unused_entry_point LocalSize 1 1 1
+               OpName %unused_entry_point "unused_entry_point"
+               OpName %f "f"
+               OpName %v "v"
+       %void = OpTypeVoid
+          %1 = OpTypeFunction %void
+        %int = OpTypeInt 32 1
+      %v2int = OpTypeVector %int 2
+          %9 = OpConstantNull %v2int
+%_ptr_Function_v2int = OpTypePointer Function %v2int
+%unused_entry_point = OpFunction %void None %1
+          %4 = OpLabel
+               OpReturn
+               OpFunctionEnd
+          %f = OpFunction %void None %1
+          %6 = OpLabel
+          %v = OpVariable %_ptr_Function_v2int Function %9
+               OpStore %v %9
+               OpReturn
+               OpFunctionEnd
diff --git a/test/expressions/zero_init/vec2/i32.wgsl.expected.wgsl b/test/expressions/zero_init/vec2/i32.wgsl.expected.wgsl
new file mode 100644
index 0000000..ebf1dfa
--- /dev/null
+++ b/test/expressions/zero_init/vec2/i32.wgsl.expected.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+  var v = vec2<i32>();
+}
diff --git a/test/expressions/zero_init/vec2/u32.wgsl b/test/expressions/zero_init/vec2/u32.wgsl
new file mode 100644
index 0000000..47ad9d1
--- /dev/null
+++ b/test/expressions/zero_init/vec2/u32.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+    var v = vec2<u32>();
+}
diff --git a/test/expressions/zero_init/vec2/u32.wgsl.expected.hlsl b/test/expressions/zero_init/vec2/u32.wgsl.expected.hlsl
new file mode 100644
index 0000000..4b9581f
--- /dev/null
+++ b/test/expressions/zero_init/vec2/u32.wgsl.expected.hlsl
@@ -0,0 +1,8 @@
+[numthreads(1, 1, 1)]
+void unused_entry_point() {
+  return;
+}
+
+void f() {
+  uint2 v = uint2(0u, 0u);
+}
diff --git a/test/expressions/zero_init/vec2/u32.wgsl.expected.msl b/test/expressions/zero_init/vec2/u32.wgsl.expected.msl
new file mode 100644
index 0000000..9c0f70c
--- /dev/null
+++ b/test/expressions/zero_init/vec2/u32.wgsl.expected.msl
@@ -0,0 +1,7 @@
+#include <metal_stdlib>
+
+using namespace metal;
+void f() {
+  uint2 v = uint2();
+}
+
diff --git a/test/expressions/zero_init/vec2/u32.wgsl.expected.spvasm b/test/expressions/zero_init/vec2/u32.wgsl.expected.spvasm
new file mode 100644
index 0000000..b95fe04
--- /dev/null
+++ b/test/expressions/zero_init/vec2/u32.wgsl.expected.spvasm
@@ -0,0 +1,28 @@
+; SPIR-V
+; Version: 1.3
+; Generator: Google Tint Compiler; 0
+; Bound: 12
+; Schema: 0
+               OpCapability Shader
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint GLCompute %unused_entry_point "unused_entry_point"
+               OpExecutionMode %unused_entry_point LocalSize 1 1 1
+               OpName %unused_entry_point "unused_entry_point"
+               OpName %f "f"
+               OpName %v "v"
+       %void = OpTypeVoid
+          %1 = OpTypeFunction %void
+       %uint = OpTypeInt 32 0
+     %v2uint = OpTypeVector %uint 2
+          %9 = OpConstantNull %v2uint
+%_ptr_Function_v2uint = OpTypePointer Function %v2uint
+%unused_entry_point = OpFunction %void None %1
+          %4 = OpLabel
+               OpReturn
+               OpFunctionEnd
+          %f = OpFunction %void None %1
+          %6 = OpLabel
+          %v = OpVariable %_ptr_Function_v2uint Function %9
+               OpStore %v %9
+               OpReturn
+               OpFunctionEnd
diff --git a/test/expressions/zero_init/vec2/u32.wgsl.expected.wgsl b/test/expressions/zero_init/vec2/u32.wgsl.expected.wgsl
new file mode 100644
index 0000000..996357d
--- /dev/null
+++ b/test/expressions/zero_init/vec2/u32.wgsl.expected.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+  var v = vec2<u32>();
+}
diff --git a/test/expressions/zero_init/vec3/bool.wgsl b/test/expressions/zero_init/vec3/bool.wgsl
new file mode 100644
index 0000000..17bf61f
--- /dev/null
+++ b/test/expressions/zero_init/vec3/bool.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+    var v = vec3<bool>();
+}
diff --git a/test/expressions/zero_init/vec3/bool.wgsl.expected.hlsl b/test/expressions/zero_init/vec3/bool.wgsl.expected.hlsl
new file mode 100644
index 0000000..5e6f7f7
--- /dev/null
+++ b/test/expressions/zero_init/vec3/bool.wgsl.expected.hlsl
@@ -0,0 +1,8 @@
+[numthreads(1, 1, 1)]
+void unused_entry_point() {
+  return;
+}
+
+void f() {
+  bool3 v = bool3(false, false, false);
+}
diff --git a/test/expressions/zero_init/vec3/bool.wgsl.expected.msl b/test/expressions/zero_init/vec3/bool.wgsl.expected.msl
new file mode 100644
index 0000000..fa8cb80
--- /dev/null
+++ b/test/expressions/zero_init/vec3/bool.wgsl.expected.msl
@@ -0,0 +1,7 @@
+#include <metal_stdlib>
+
+using namespace metal;
+void f() {
+  bool3 v = bool3();
+}
+
diff --git a/test/expressions/zero_init/vec3/bool.wgsl.expected.spvasm b/test/expressions/zero_init/vec3/bool.wgsl.expected.spvasm
new file mode 100644
index 0000000..ab82c2b
--- /dev/null
+++ b/test/expressions/zero_init/vec3/bool.wgsl.expected.spvasm
@@ -0,0 +1,28 @@
+; SPIR-V
+; Version: 1.3
+; Generator: Google Tint Compiler; 0
+; Bound: 12
+; Schema: 0
+               OpCapability Shader
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint GLCompute %unused_entry_point "unused_entry_point"
+               OpExecutionMode %unused_entry_point LocalSize 1 1 1
+               OpName %unused_entry_point "unused_entry_point"
+               OpName %f "f"
+               OpName %v "v"
+       %void = OpTypeVoid
+          %1 = OpTypeFunction %void
+       %bool = OpTypeBool
+     %v3bool = OpTypeVector %bool 3
+          %9 = OpConstantNull %v3bool
+%_ptr_Function_v3bool = OpTypePointer Function %v3bool
+%unused_entry_point = OpFunction %void None %1
+          %4 = OpLabel
+               OpReturn
+               OpFunctionEnd
+          %f = OpFunction %void None %1
+          %6 = OpLabel
+          %v = OpVariable %_ptr_Function_v3bool Function %9
+               OpStore %v %9
+               OpReturn
+               OpFunctionEnd
diff --git a/test/expressions/zero_init/vec3/bool.wgsl.expected.wgsl b/test/expressions/zero_init/vec3/bool.wgsl.expected.wgsl
new file mode 100644
index 0000000..b002ca9
--- /dev/null
+++ b/test/expressions/zero_init/vec3/bool.wgsl.expected.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+  var v = vec3<bool>();
+}
diff --git a/test/expressions/zero_init/vec3/f32.wgsl b/test/expressions/zero_init/vec3/f32.wgsl
new file mode 100644
index 0000000..08133af
--- /dev/null
+++ b/test/expressions/zero_init/vec3/f32.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+    var v = vec3<f32>();
+}
diff --git a/test/expressions/zero_init/vec3/f32.wgsl.expected.hlsl b/test/expressions/zero_init/vec3/f32.wgsl.expected.hlsl
new file mode 100644
index 0000000..6f4b969
--- /dev/null
+++ b/test/expressions/zero_init/vec3/f32.wgsl.expected.hlsl
@@ -0,0 +1,8 @@
+[numthreads(1, 1, 1)]
+void unused_entry_point() {
+  return;
+}
+
+void f() {
+  float3 v = float3(0.0f, 0.0f, 0.0f);
+}
diff --git a/test/expressions/zero_init/vec3/f32.wgsl.expected.msl b/test/expressions/zero_init/vec3/f32.wgsl.expected.msl
new file mode 100644
index 0000000..c40910c
--- /dev/null
+++ b/test/expressions/zero_init/vec3/f32.wgsl.expected.msl
@@ -0,0 +1,7 @@
+#include <metal_stdlib>
+
+using namespace metal;
+void f() {
+  float3 v = float3();
+}
+
diff --git a/test/expressions/zero_init/vec3/f32.wgsl.expected.spvasm b/test/expressions/zero_init/vec3/f32.wgsl.expected.spvasm
new file mode 100644
index 0000000..d38366c
--- /dev/null
+++ b/test/expressions/zero_init/vec3/f32.wgsl.expected.spvasm
@@ -0,0 +1,28 @@
+; SPIR-V
+; Version: 1.3
+; Generator: Google Tint Compiler; 0
+; Bound: 12
+; Schema: 0
+               OpCapability Shader
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint GLCompute %unused_entry_point "unused_entry_point"
+               OpExecutionMode %unused_entry_point LocalSize 1 1 1
+               OpName %unused_entry_point "unused_entry_point"
+               OpName %f "f"
+               OpName %v "v"
+       %void = OpTypeVoid
+          %1 = OpTypeFunction %void
+      %float = OpTypeFloat 32
+    %v3float = OpTypeVector %float 3
+          %9 = OpConstantNull %v3float
+%_ptr_Function_v3float = OpTypePointer Function %v3float
+%unused_entry_point = OpFunction %void None %1
+          %4 = OpLabel
+               OpReturn
+               OpFunctionEnd
+          %f = OpFunction %void None %1
+          %6 = OpLabel
+          %v = OpVariable %_ptr_Function_v3float Function %9
+               OpStore %v %9
+               OpReturn
+               OpFunctionEnd
diff --git a/test/expressions/zero_init/vec3/f32.wgsl.expected.wgsl b/test/expressions/zero_init/vec3/f32.wgsl.expected.wgsl
new file mode 100644
index 0000000..2448499
--- /dev/null
+++ b/test/expressions/zero_init/vec3/f32.wgsl.expected.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+  var v = vec3<f32>();
+}
diff --git a/test/expressions/zero_init/vec3/i32.wgsl b/test/expressions/zero_init/vec3/i32.wgsl
new file mode 100644
index 0000000..534b7f4
--- /dev/null
+++ b/test/expressions/zero_init/vec3/i32.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+    var v = vec3<i32>();
+}
diff --git a/test/expressions/zero_init/vec3/i32.wgsl.expected.hlsl b/test/expressions/zero_init/vec3/i32.wgsl.expected.hlsl
new file mode 100644
index 0000000..5f68dd8
--- /dev/null
+++ b/test/expressions/zero_init/vec3/i32.wgsl.expected.hlsl
@@ -0,0 +1,8 @@
+[numthreads(1, 1, 1)]
+void unused_entry_point() {
+  return;
+}
+
+void f() {
+  int3 v = int3(0, 0, 0);
+}
diff --git a/test/expressions/zero_init/vec3/i32.wgsl.expected.msl b/test/expressions/zero_init/vec3/i32.wgsl.expected.msl
new file mode 100644
index 0000000..8677766
--- /dev/null
+++ b/test/expressions/zero_init/vec3/i32.wgsl.expected.msl
@@ -0,0 +1,7 @@
+#include <metal_stdlib>
+
+using namespace metal;
+void f() {
+  int3 v = int3();
+}
+
diff --git a/test/expressions/zero_init/vec3/i32.wgsl.expected.spvasm b/test/expressions/zero_init/vec3/i32.wgsl.expected.spvasm
new file mode 100644
index 0000000..039a6f6
--- /dev/null
+++ b/test/expressions/zero_init/vec3/i32.wgsl.expected.spvasm
@@ -0,0 +1,28 @@
+; SPIR-V
+; Version: 1.3
+; Generator: Google Tint Compiler; 0
+; Bound: 12
+; Schema: 0
+               OpCapability Shader
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint GLCompute %unused_entry_point "unused_entry_point"
+               OpExecutionMode %unused_entry_point LocalSize 1 1 1
+               OpName %unused_entry_point "unused_entry_point"
+               OpName %f "f"
+               OpName %v "v"
+       %void = OpTypeVoid
+          %1 = OpTypeFunction %void
+        %int = OpTypeInt 32 1
+      %v3int = OpTypeVector %int 3
+          %9 = OpConstantNull %v3int
+%_ptr_Function_v3int = OpTypePointer Function %v3int
+%unused_entry_point = OpFunction %void None %1
+          %4 = OpLabel
+               OpReturn
+               OpFunctionEnd
+          %f = OpFunction %void None %1
+          %6 = OpLabel
+          %v = OpVariable %_ptr_Function_v3int Function %9
+               OpStore %v %9
+               OpReturn
+               OpFunctionEnd
diff --git a/test/expressions/zero_init/vec3/i32.wgsl.expected.wgsl b/test/expressions/zero_init/vec3/i32.wgsl.expected.wgsl
new file mode 100644
index 0000000..16d8dbb
--- /dev/null
+++ b/test/expressions/zero_init/vec3/i32.wgsl.expected.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+  var v = vec3<i32>();
+}
diff --git a/test/expressions/zero_init/vec3/u32.wgsl b/test/expressions/zero_init/vec3/u32.wgsl
new file mode 100644
index 0000000..b435bb1
--- /dev/null
+++ b/test/expressions/zero_init/vec3/u32.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+    var v = vec3<u32>();
+}
diff --git a/test/expressions/zero_init/vec3/u32.wgsl.expected.hlsl b/test/expressions/zero_init/vec3/u32.wgsl.expected.hlsl
new file mode 100644
index 0000000..01274d3
--- /dev/null
+++ b/test/expressions/zero_init/vec3/u32.wgsl.expected.hlsl
@@ -0,0 +1,8 @@
+[numthreads(1, 1, 1)]
+void unused_entry_point() {
+  return;
+}
+
+void f() {
+  uint3 v = uint3(0u, 0u, 0u);
+}
diff --git a/test/expressions/zero_init/vec3/u32.wgsl.expected.msl b/test/expressions/zero_init/vec3/u32.wgsl.expected.msl
new file mode 100644
index 0000000..bb2de04
--- /dev/null
+++ b/test/expressions/zero_init/vec3/u32.wgsl.expected.msl
@@ -0,0 +1,7 @@
+#include <metal_stdlib>
+
+using namespace metal;
+void f() {
+  uint3 v = uint3();
+}
+
diff --git a/test/expressions/zero_init/vec3/u32.wgsl.expected.spvasm b/test/expressions/zero_init/vec3/u32.wgsl.expected.spvasm
new file mode 100644
index 0000000..2950d7d
--- /dev/null
+++ b/test/expressions/zero_init/vec3/u32.wgsl.expected.spvasm
@@ -0,0 +1,28 @@
+; SPIR-V
+; Version: 1.3
+; Generator: Google Tint Compiler; 0
+; Bound: 12
+; Schema: 0
+               OpCapability Shader
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint GLCompute %unused_entry_point "unused_entry_point"
+               OpExecutionMode %unused_entry_point LocalSize 1 1 1
+               OpName %unused_entry_point "unused_entry_point"
+               OpName %f "f"
+               OpName %v "v"
+       %void = OpTypeVoid
+          %1 = OpTypeFunction %void
+       %uint = OpTypeInt 32 0
+     %v3uint = OpTypeVector %uint 3
+          %9 = OpConstantNull %v3uint
+%_ptr_Function_v3uint = OpTypePointer Function %v3uint
+%unused_entry_point = OpFunction %void None %1
+          %4 = OpLabel
+               OpReturn
+               OpFunctionEnd
+          %f = OpFunction %void None %1
+          %6 = OpLabel
+          %v = OpVariable %_ptr_Function_v3uint Function %9
+               OpStore %v %9
+               OpReturn
+               OpFunctionEnd
diff --git a/test/expressions/zero_init/vec3/u32.wgsl.expected.wgsl b/test/expressions/zero_init/vec3/u32.wgsl.expected.wgsl
new file mode 100644
index 0000000..b88a514
--- /dev/null
+++ b/test/expressions/zero_init/vec3/u32.wgsl.expected.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+  var v = vec3<u32>();
+}
diff --git a/test/expressions/zero_init/vec4/bool.wgsl b/test/expressions/zero_init/vec4/bool.wgsl
new file mode 100644
index 0000000..7c67074
--- /dev/null
+++ b/test/expressions/zero_init/vec4/bool.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+    var v = vec4<bool>();
+}
diff --git a/test/expressions/zero_init/vec4/bool.wgsl.expected.hlsl b/test/expressions/zero_init/vec4/bool.wgsl.expected.hlsl
new file mode 100644
index 0000000..af6543d
--- /dev/null
+++ b/test/expressions/zero_init/vec4/bool.wgsl.expected.hlsl
@@ -0,0 +1,8 @@
+[numthreads(1, 1, 1)]
+void unused_entry_point() {
+  return;
+}
+
+void f() {
+  bool4 v = bool4(false, false, false, false);
+}
diff --git a/test/expressions/zero_init/vec4/bool.wgsl.expected.msl b/test/expressions/zero_init/vec4/bool.wgsl.expected.msl
new file mode 100644
index 0000000..0d3be82
--- /dev/null
+++ b/test/expressions/zero_init/vec4/bool.wgsl.expected.msl
@@ -0,0 +1,7 @@
+#include <metal_stdlib>
+
+using namespace metal;
+void f() {
+  bool4 v = bool4();
+}
+
diff --git a/test/expressions/zero_init/vec4/bool.wgsl.expected.spvasm b/test/expressions/zero_init/vec4/bool.wgsl.expected.spvasm
new file mode 100644
index 0000000..b448567
--- /dev/null
+++ b/test/expressions/zero_init/vec4/bool.wgsl.expected.spvasm
@@ -0,0 +1,28 @@
+; SPIR-V
+; Version: 1.3
+; Generator: Google Tint Compiler; 0
+; Bound: 12
+; Schema: 0
+               OpCapability Shader
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint GLCompute %unused_entry_point "unused_entry_point"
+               OpExecutionMode %unused_entry_point LocalSize 1 1 1
+               OpName %unused_entry_point "unused_entry_point"
+               OpName %f "f"
+               OpName %v "v"
+       %void = OpTypeVoid
+          %1 = OpTypeFunction %void
+       %bool = OpTypeBool
+     %v4bool = OpTypeVector %bool 4
+          %9 = OpConstantNull %v4bool
+%_ptr_Function_v4bool = OpTypePointer Function %v4bool
+%unused_entry_point = OpFunction %void None %1
+          %4 = OpLabel
+               OpReturn
+               OpFunctionEnd
+          %f = OpFunction %void None %1
+          %6 = OpLabel
+          %v = OpVariable %_ptr_Function_v4bool Function %9
+               OpStore %v %9
+               OpReturn
+               OpFunctionEnd
diff --git a/test/expressions/zero_init/vec4/bool.wgsl.expected.wgsl b/test/expressions/zero_init/vec4/bool.wgsl.expected.wgsl
new file mode 100644
index 0000000..8cc421c
--- /dev/null
+++ b/test/expressions/zero_init/vec4/bool.wgsl.expected.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+  var v = vec4<bool>();
+}
diff --git a/test/expressions/zero_init/vec4/f32.wgsl b/test/expressions/zero_init/vec4/f32.wgsl
new file mode 100644
index 0000000..0251428
--- /dev/null
+++ b/test/expressions/zero_init/vec4/f32.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+    var v = vec4<f32>();
+}
diff --git a/test/expressions/zero_init/vec4/f32.wgsl.expected.hlsl b/test/expressions/zero_init/vec4/f32.wgsl.expected.hlsl
new file mode 100644
index 0000000..77c44c2
--- /dev/null
+++ b/test/expressions/zero_init/vec4/f32.wgsl.expected.hlsl
@@ -0,0 +1,8 @@
+[numthreads(1, 1, 1)]
+void unused_entry_point() {
+  return;
+}
+
+void f() {
+  float4 v = float4(0.0f, 0.0f, 0.0f, 0.0f);
+}
diff --git a/test/expressions/zero_init/vec4/f32.wgsl.expected.msl b/test/expressions/zero_init/vec4/f32.wgsl.expected.msl
new file mode 100644
index 0000000..76c2b77
--- /dev/null
+++ b/test/expressions/zero_init/vec4/f32.wgsl.expected.msl
@@ -0,0 +1,7 @@
+#include <metal_stdlib>
+
+using namespace metal;
+void f() {
+  float4 v = float4();
+}
+
diff --git a/test/expressions/zero_init/vec4/f32.wgsl.expected.spvasm b/test/expressions/zero_init/vec4/f32.wgsl.expected.spvasm
new file mode 100644
index 0000000..c81af8d
--- /dev/null
+++ b/test/expressions/zero_init/vec4/f32.wgsl.expected.spvasm
@@ -0,0 +1,28 @@
+; SPIR-V
+; Version: 1.3
+; Generator: Google Tint Compiler; 0
+; Bound: 12
+; Schema: 0
+               OpCapability Shader
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint GLCompute %unused_entry_point "unused_entry_point"
+               OpExecutionMode %unused_entry_point LocalSize 1 1 1
+               OpName %unused_entry_point "unused_entry_point"
+               OpName %f "f"
+               OpName %v "v"
+       %void = OpTypeVoid
+          %1 = OpTypeFunction %void
+      %float = OpTypeFloat 32
+    %v4float = OpTypeVector %float 4
+          %9 = OpConstantNull %v4float
+%_ptr_Function_v4float = OpTypePointer Function %v4float
+%unused_entry_point = OpFunction %void None %1
+          %4 = OpLabel
+               OpReturn
+               OpFunctionEnd
+          %f = OpFunction %void None %1
+          %6 = OpLabel
+          %v = OpVariable %_ptr_Function_v4float Function %9
+               OpStore %v %9
+               OpReturn
+               OpFunctionEnd
diff --git a/test/expressions/zero_init/vec4/f32.wgsl.expected.wgsl b/test/expressions/zero_init/vec4/f32.wgsl.expected.wgsl
new file mode 100644
index 0000000..f1652ac
--- /dev/null
+++ b/test/expressions/zero_init/vec4/f32.wgsl.expected.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+  var v = vec4<f32>();
+}
diff --git a/test/expressions/zero_init/vec4/i32.wgsl b/test/expressions/zero_init/vec4/i32.wgsl
new file mode 100644
index 0000000..908d349
--- /dev/null
+++ b/test/expressions/zero_init/vec4/i32.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+    var v = vec4<i32>();
+}
diff --git a/test/expressions/zero_init/vec4/i32.wgsl.expected.hlsl b/test/expressions/zero_init/vec4/i32.wgsl.expected.hlsl
new file mode 100644
index 0000000..5df8027
--- /dev/null
+++ b/test/expressions/zero_init/vec4/i32.wgsl.expected.hlsl
@@ -0,0 +1,8 @@
+[numthreads(1, 1, 1)]
+void unused_entry_point() {
+  return;
+}
+
+void f() {
+  int4 v = int4(0, 0, 0, 0);
+}
diff --git a/test/expressions/zero_init/vec4/i32.wgsl.expected.msl b/test/expressions/zero_init/vec4/i32.wgsl.expected.msl
new file mode 100644
index 0000000..78ebdab
--- /dev/null
+++ b/test/expressions/zero_init/vec4/i32.wgsl.expected.msl
@@ -0,0 +1,7 @@
+#include <metal_stdlib>
+
+using namespace metal;
+void f() {
+  int4 v = int4();
+}
+
diff --git a/test/expressions/zero_init/vec4/i32.wgsl.expected.spvasm b/test/expressions/zero_init/vec4/i32.wgsl.expected.spvasm
new file mode 100644
index 0000000..d2d1678
--- /dev/null
+++ b/test/expressions/zero_init/vec4/i32.wgsl.expected.spvasm
@@ -0,0 +1,28 @@
+; SPIR-V
+; Version: 1.3
+; Generator: Google Tint Compiler; 0
+; Bound: 12
+; Schema: 0
+               OpCapability Shader
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint GLCompute %unused_entry_point "unused_entry_point"
+               OpExecutionMode %unused_entry_point LocalSize 1 1 1
+               OpName %unused_entry_point "unused_entry_point"
+               OpName %f "f"
+               OpName %v "v"
+       %void = OpTypeVoid
+          %1 = OpTypeFunction %void
+        %int = OpTypeInt 32 1
+      %v4int = OpTypeVector %int 4
+          %9 = OpConstantNull %v4int
+%_ptr_Function_v4int = OpTypePointer Function %v4int
+%unused_entry_point = OpFunction %void None %1
+          %4 = OpLabel
+               OpReturn
+               OpFunctionEnd
+          %f = OpFunction %void None %1
+          %6 = OpLabel
+          %v = OpVariable %_ptr_Function_v4int Function %9
+               OpStore %v %9
+               OpReturn
+               OpFunctionEnd
diff --git a/test/expressions/zero_init/vec4/i32.wgsl.expected.wgsl b/test/expressions/zero_init/vec4/i32.wgsl.expected.wgsl
new file mode 100644
index 0000000..90705c6
--- /dev/null
+++ b/test/expressions/zero_init/vec4/i32.wgsl.expected.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+  var v = vec4<i32>();
+}
diff --git a/test/expressions/zero_init/vec4/u32.wgsl b/test/expressions/zero_init/vec4/u32.wgsl
new file mode 100644
index 0000000..71477cf
--- /dev/null
+++ b/test/expressions/zero_init/vec4/u32.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+    var v = vec4<u32>();
+}
diff --git a/test/expressions/zero_init/vec4/u32.wgsl.expected.hlsl b/test/expressions/zero_init/vec4/u32.wgsl.expected.hlsl
new file mode 100644
index 0000000..0a7eccd
--- /dev/null
+++ b/test/expressions/zero_init/vec4/u32.wgsl.expected.hlsl
@@ -0,0 +1,8 @@
+[numthreads(1, 1, 1)]
+void unused_entry_point() {
+  return;
+}
+
+void f() {
+  uint4 v = uint4(0u, 0u, 0u, 0u);
+}
diff --git a/test/expressions/zero_init/vec4/u32.wgsl.expected.msl b/test/expressions/zero_init/vec4/u32.wgsl.expected.msl
new file mode 100644
index 0000000..9d55361
--- /dev/null
+++ b/test/expressions/zero_init/vec4/u32.wgsl.expected.msl
@@ -0,0 +1,7 @@
+#include <metal_stdlib>
+
+using namespace metal;
+void f() {
+  uint4 v = uint4();
+}
+
diff --git a/test/expressions/zero_init/vec4/u32.wgsl.expected.spvasm b/test/expressions/zero_init/vec4/u32.wgsl.expected.spvasm
new file mode 100644
index 0000000..d8e0911
--- /dev/null
+++ b/test/expressions/zero_init/vec4/u32.wgsl.expected.spvasm
@@ -0,0 +1,28 @@
+; SPIR-V
+; Version: 1.3
+; Generator: Google Tint Compiler; 0
+; Bound: 12
+; Schema: 0
+               OpCapability Shader
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint GLCompute %unused_entry_point "unused_entry_point"
+               OpExecutionMode %unused_entry_point LocalSize 1 1 1
+               OpName %unused_entry_point "unused_entry_point"
+               OpName %f "f"
+               OpName %v "v"
+       %void = OpTypeVoid
+          %1 = OpTypeFunction %void
+       %uint = OpTypeInt 32 0
+     %v4uint = OpTypeVector %uint 4
+          %9 = OpConstantNull %v4uint
+%_ptr_Function_v4uint = OpTypePointer Function %v4uint
+%unused_entry_point = OpFunction %void None %1
+          %4 = OpLabel
+               OpReturn
+               OpFunctionEnd
+          %f = OpFunction %void None %1
+          %6 = OpLabel
+          %v = OpVariable %_ptr_Function_v4uint Function %9
+               OpStore %v %9
+               OpReturn
+               OpFunctionEnd
diff --git a/test/expressions/zero_init/vec4/u32.wgsl.expected.wgsl b/test/expressions/zero_init/vec4/u32.wgsl.expected.wgsl
new file mode 100644
index 0000000..697b5e4
--- /dev/null
+++ b/test/expressions/zero_init/vec4/u32.wgsl.expected.wgsl
@@ -0,0 +1,3 @@
+fn f() {
+  var v = vec4<u32>();
+}