Add test case for tint:219

The original problem appears to be fixed.

Fixed: tint:219
Change-Id: I8d16fbb715da3ca149769699c86f86a4bed85b4f
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/57703
Auto-Submit: Ben Clayton <bclayton@google.com>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>

test/bug/tint/219.spvasm

@@ -0,0 +1,30 @@
+           OpCapability Shader
+           OpMemoryModel Logical Simple
+           OpEntryPoint GLCompute %100 "main"
+           OpExecutionMode %100 LocalSize 1 1 1
+   %void = OpTypeVoid
+ %voidfn = OpTypeFunction %void
+   %uint = OpTypeInt 32 0
+ %uint_0 = OpConstant %uint 0
+  %float = OpTypeFloat 32
+%v2float = OpTypeVector %float 2
+%ptr_v2f = OpTypePointer Function %v2float
+  %ptr_f = OpTypePointer Function %float
+%floatfn = OpTypeFunction %float %ptr_v2f
+
+    %200 = OpFunction %float None %floatfn
+    %201 = OpFunctionParameter %ptr_v2f
+
+    %210 = OpLabel
+    %211 = OpAccessChain %ptr_f %201 %uint_0
+    %212 = OpLoad %float %211
+           OpReturnValue %212
+           OpFunctionEnd
+
+
+    %100 = OpFunction %void None %voidfn
+     %10 = OpLabel
+     %11 = OpVariable %ptr_v2f Function
+      %f = OpFunctionCall %float %200 %11
+           OpReturn
+           OpFunctionEnd

test/bug/tint/219.spvasm.expected.hlsl

@@ -0,0 +1,16 @@
+float x_200(inout float2 x_201) {
+  const float x_212 = x_201.x;
+  return x_212;
+}
+
+void main_1() {
+  float2 x_11 = float2(0.0f, 0.0f);
+  const float x_12 = x_200(x_11);
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void main() {
+  main_1();
+  return;
+}

test/bug/tint/219.spvasm.expected.msl

@@ -0,0 +1,19 @@
+#include <metal_stdlib>
+
+using namespace metal;
+float x_200(thread float2* const x_201) {
+  float const x_212 = (*(x_201)).x;
+  return x_212;
+}
+
+void main_1() {
+  float2 x_11 = 0.0f;
+  float const x_12 = x_200(&(x_11));
+  return;
+}
+
+kernel void tint_symbol() {
+  main_1();
+  return;
+}
+

test/bug/tint/219.spvasm.expected.spvasm

@@ -0,0 +1,42 @@
+; SPIR-V
+; Version: 1.3
+; Generator: Google Tint Compiler; 0
+; Bound: 25
+; Schema: 0
+               OpCapability Shader
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint GLCompute %main "main"
+               OpExecutionMode %main LocalSize 1 1 1
+               OpName %x_200 "x_200"
+               OpName %x_201 "x_201"
+               OpName %main_1 "main_1"
+               OpName %x_11 "x_11"
+               OpName %main "main"
+      %float = OpTypeFloat 32
+    %v2float = OpTypeVector %float 2
+%_ptr_Function_v2float = OpTypePointer Function %v2float
+          %1 = OpTypeFunction %float %_ptr_Function_v2float
+       %uint = OpTypeInt 32 0
+     %uint_0 = OpConstant %uint 0
+%_ptr_Function_float = OpTypePointer Function %float
+       %void = OpTypeVoid
+         %14 = OpTypeFunction %void
+         %19 = OpConstantNull %v2float
+      %x_200 = OpFunction %float None %1
+      %x_201 = OpFunctionParameter %_ptr_Function_v2float
+          %7 = OpLabel
+         %12 = OpAccessChain %_ptr_Function_float %x_201 %uint_0
+         %13 = OpLoad %float %12
+               OpReturnValue %13
+               OpFunctionEnd
+     %main_1 = OpFunction %void None %14
+         %17 = OpLabel
+       %x_11 = OpVariable %_ptr_Function_v2float Function %19
+         %20 = OpFunctionCall %float %x_200 %x_11
+               OpReturn
+               OpFunctionEnd
+       %main = OpFunction %void None %14
+         %23 = OpLabel
+         %24 = OpFunctionCall %void %main_1
+               OpReturn
+               OpFunctionEnd

test/bug/tint/219.spvasm.expected.wgsl

@@ -0,0 +1,15 @@
+fn x_200(x_201 : ptr<function, vec2<f32>>) -> f32 {
+  let x_212 : f32 = (*(x_201)).x;
+  return x_212;
+}
+
+fn main_1() {
+  var x_11 : vec2<f32>;
+  let x_12 : f32 = x_200(&(x_11));
+  return;
+}
+
+[[stage(compute), workgroup_size(1, 1, 1)]]
+fn main() {
+  main_1();
+}