tint: Allow signed / unsigned texture builtin params

Bug: tint:1526
Change-Id: I301a9ba6e94b162a1ffb436be3e3212b723b7401
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/106682
Reviewed-by: Dan Sinclair <dsinclair@chromium.org>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
diff --git a/test/tint/builtins/gen/literal/textureSampleLevel/73e892.wgsl.expected.msl b/test/tint/builtins/gen/literal/textureSampleLevel/73e892.wgsl.expected.msl
new file mode 100644
index 0000000..4ab087d
--- /dev/null
+++ b/test/tint/builtins/gen/literal/textureSampleLevel/73e892.wgsl.expected.msl
@@ -0,0 +1,33 @@
+#include <metal_stdlib>
+
+using namespace metal;
+void textureSampleLevel_73e892(depth2d<float, access::sample> tint_symbol_1, sampler tint_symbol_2) {
+  float res = tint_symbol_1.sample(tint_symbol_2, float2(0.0f), level(1u));
+}
+
+struct tint_symbol {
+  float4 value [[position]];
+};
+
+float4 vertex_main_inner(depth2d<float, access::sample> tint_symbol_3, sampler tint_symbol_4) {
+  textureSampleLevel_73e892(tint_symbol_3, tint_symbol_4);
+  return float4(0.0f);
+}
+
+vertex tint_symbol vertex_main(depth2d<float, access::sample> tint_symbol_5 [[texture(0)]], sampler tint_symbol_6 [[sampler(0)]]) {
+  float4 const inner_result = vertex_main_inner(tint_symbol_5, tint_symbol_6);
+  tint_symbol wrapper_result = {};
+  wrapper_result.value = inner_result;
+  return wrapper_result;
+}
+
+fragment void fragment_main(depth2d<float, access::sample> tint_symbol_7 [[texture(0)]], sampler tint_symbol_8 [[sampler(0)]]) {
+  textureSampleLevel_73e892(tint_symbol_7, tint_symbol_8);
+  return;
+}
+
+kernel void compute_main(depth2d<float, access::sample> tint_symbol_9 [[texture(0)]], sampler tint_symbol_10 [[sampler(0)]]) {
+  textureSampleLevel_73e892(tint_symbol_9, tint_symbol_10);
+  return;
+}
+