[spirv] Fix issues of RWByteAddressBuffer in the InitList

[jiaolu]

RWByteAddressBuffer object in the initList should be handled like
OpaqueType RWBuffer or Texture2D.

[AppVeyorBot]

✅ Build DirectXShaderCompiler 1.0.3642 completed (commit 423ae96695 by @jiaolu)

[jaebaek]

Could you please add the following code?

diff --git a/tools/clang/unittests/SPIRV/CodeGenSpirvTest.cpp b/tools/clang/unittests/SPIRV/CodeGenSpirvTest.cpp
index 5baa27086..660d4243c 100644
--- a/tools/clang/unittests/SPIRV/CodeGenSpirvTest.cpp
+++ b/tools/clang/unittests/SPIRV/CodeGenSpirvTest.cpp
@@ -983,6 +983,11 @@ TEST_F(FileTest, RWByteAddressBufferAtomicMethods) {
   runFileTest("method.rw-byte-address-buffer.atomic.hlsl");
 }
 
+TEST_F(FileTest, InitializeListRWByteAddressBuffer) {
+  runFileTest("initializelist.rwbyteaddressbuffer.hlsl", Expect::Success,
+              /* runValidation */ false);
+}
+
 // For Buffer/RWBuffer methods
 TEST_F(FileTest, BufferLoad) { runFileTest("method.buffer.load.hlsl"); }
 TEST_F(FileTest, BufferGetDimensions) {

[jaebaek]

I think we have to use the following code for this unit test.

// Run: %dxc -T cs_6_0 -E main
RWBuffer<int> buffer1 : register(u1);
RWByteAddressBuffer buffer2 : register(u2);

// CHECK: [[Resource:%\w+]] = OpTypeStruct %type_RWByteAddressBuffer %uint
struct Resource {
  RWByteAddressBuffer rwbuffer;
  uint offset;
};

[numthreads(8, 1, 1)]
void main(uint globalId : SV_DispatchThreadID,
          uint localId  : SV_GroupThreadID,
          uint groupId  : SV_GroupID) {
// CHECK: [[buffer2:%\w+]] = OpVariable %_ptr_Uniform_type_RWByteAddressBuffer Uniform
  Resource resourceInfo2 = {buffer2, 2};
// CHECK: OpCompositeConstruct [[Resource]] [[buffer2]] %uint_2
  buffer1[0] = resourceInfo2.rwbuffer.Load(0);
}

[AppVeyorBot]

✅ Build DirectXShaderCompiler 1.0.3685 completed (commit ce4d343a17 by @jiaolu)