[tint] Add read-only storage texture builtins
Most backends "just worked", except HLSL which uses a different
register space for read-only textures.
Bug: tint:2007
Change-Id: I7925b3bdf7389e3b429e0a570e988adde0443452
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/146961
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
diff --git a/test/tint/builtins/gen/literal/textureLoad/c02b74.wgsl.expected.spvasm b/test/tint/builtins/gen/literal/textureLoad/c02b74.wgsl.expected.spvasm
new file mode 100644
index 0000000..6618552
--- /dev/null
+++ b/test/tint/builtins/gen/literal/textureLoad/c02b74.wgsl.expected.spvasm
@@ -0,0 +1,91 @@
+; SPIR-V
+; Version: 1.3
+; Generator: Google Tint Compiler; 0
+; Bound: 44
+; Schema: 0
+ OpCapability Shader
+ OpCapability Image1D
+ OpMemoryModel Logical GLSL450
+ OpEntryPoint Vertex %vertex_main "vertex_main" %value %vertex_point_size
+ OpEntryPoint Fragment %fragment_main "fragment_main"
+ OpEntryPoint GLCompute %compute_main "compute_main"
+ OpExecutionMode %fragment_main OriginUpperLeft
+ OpExecutionMode %compute_main LocalSize 1 1 1
+ OpName %value "value"
+ OpName %vertex_point_size "vertex_point_size"
+ OpName %arg_0 "arg_0"
+ OpName %prevent_dce_block "prevent_dce_block"
+ OpMemberName %prevent_dce_block 0 "inner"
+ OpName %prevent_dce "prevent_dce"
+ OpName %textureLoad_c02b74 "textureLoad_c02b74"
+ OpName %res "res"
+ OpName %vertex_main_inner "vertex_main_inner"
+ OpName %vertex_main "vertex_main"
+ OpName %fragment_main "fragment_main"
+ OpName %compute_main "compute_main"
+ OpDecorate %value BuiltIn Position
+ OpDecorate %vertex_point_size BuiltIn PointSize
+ OpDecorate %arg_0 NonWritable
+ OpDecorate %arg_0 DescriptorSet 1
+ OpDecorate %arg_0 Binding 0
+ OpDecorate %prevent_dce_block Block
+ OpMemberDecorate %prevent_dce_block 0 Offset 0
+ OpDecorate %prevent_dce DescriptorSet 2
+ OpDecorate %prevent_dce Binding 0
+ %float = OpTypeFloat 32
+ %v4float = OpTypeVector %float 4
+%_ptr_Output_v4float = OpTypePointer Output %v4float
+ %5 = OpConstantNull %v4float
+ %value = OpVariable %_ptr_Output_v4float Output %5
+%_ptr_Output_float = OpTypePointer Output %float
+ %8 = OpConstantNull %float
+%vertex_point_size = OpVariable %_ptr_Output_float Output %8
+ %11 = OpTypeImage %float 1D 0 0 0 2 Rgba16f
+%_ptr_UniformConstant_11 = OpTypePointer UniformConstant %11
+ %arg_0 = OpVariable %_ptr_UniformConstant_11 UniformConstant
+%prevent_dce_block = OpTypeStruct %v4float
+%_ptr_StorageBuffer_prevent_dce_block = OpTypePointer StorageBuffer %prevent_dce_block
+%prevent_dce = OpVariable %_ptr_StorageBuffer_prevent_dce_block StorageBuffer
+ %void = OpTypeVoid
+ %15 = OpTypeFunction %void
+ %int = OpTypeInt 32 1
+ %int_1 = OpConstant %int 1
+%_ptr_Function_v4float = OpTypePointer Function %v4float
+ %uint = OpTypeInt 32 0
+ %uint_0 = OpConstant %uint 0
+%_ptr_StorageBuffer_v4float = OpTypePointer StorageBuffer %v4float
+ %30 = OpTypeFunction %v4float
+ %float_1 = OpConstant %float 1
+%textureLoad_c02b74 = OpFunction %void None %15
+ %18 = OpLabel
+ %res = OpVariable %_ptr_Function_v4float Function %5
+ %20 = OpLoad %11 %arg_0
+ %19 = OpImageRead %v4float %20 %int_1
+ OpStore %res %19
+ %28 = OpAccessChain %_ptr_StorageBuffer_v4float %prevent_dce %uint_0
+ %29 = OpLoad %v4float %res
+ OpStore %28 %29
+ OpReturn
+ OpFunctionEnd
+%vertex_main_inner = OpFunction %v4float None %30
+ %32 = OpLabel
+ %33 = OpFunctionCall %void %textureLoad_c02b74
+ OpReturnValue %5
+ OpFunctionEnd
+%vertex_main = OpFunction %void None %15
+ %35 = OpLabel
+ %36 = OpFunctionCall %v4float %vertex_main_inner
+ OpStore %value %36
+ OpStore %vertex_point_size %float_1
+ OpReturn
+ OpFunctionEnd
+%fragment_main = OpFunction %void None %15
+ %39 = OpLabel
+ %40 = OpFunctionCall %void %textureLoad_c02b74
+ OpReturn
+ OpFunctionEnd
+%compute_main = OpFunction %void None %15
+ %42 = OpLabel
+ %43 = OpFunctionCall %void %textureLoad_c02b74
+ OpReturn
+ OpFunctionEnd
