[HLSL][SPIR-V] Change SPV AS map for groupshared

[Keenuts]

The previous mapping we setting the hlsl_groupshared AS to 0, which translated to either Generic or Function.
Changing this to 3, which translated to Workgroup.

Related to #142804

[llvmbot]

@llvm/pr-subscribers-clang

@llvm/pr-subscribers-hlsl

Author: Nathan Gauër (Keenuts)

Changes

The previous mapping we setting the hlsl_groupshared AS to 0, which translated to either Generic or Function.
Changing this to 3, which translated to Workgroup.

Related to #142804

---

Full diff: https://github.com/llvm/llvm-project/pull/143519.diff

2 Files Affected:

• (modified) clang/lib/Basic/Targets/SPIR.h (+2-2)
• (modified) clang/test/CodeGenHLSL/group_shared.hlsl (+4)

diff --git a/clang/lib/Basic/Targets/SPIR.h b/clang/lib/Basic/Targets/SPIR.h
index 0eaf82eee756b..b416a01f0f374 100644
--- a/clang/lib/Basic/Targets/SPIR.h
+++ b/clang/lib/Basic/Targets/SPIR.h
@@ -46,7 +46,7 @@ static const unsigned SPIRDefIsPrivMap[] = {
     0,  // ptr32_sptr
     0,  // ptr32_uptr
     0,  // ptr64
-    0,  // hlsl_groupshared
+    3,  // hlsl_groupshared
     12, // hlsl_constant
     10, // hlsl_private
     11, // hlsl_device
@@ -82,7 +82,7 @@ static const unsigned SPIRDefIsGenMap[] = {
     0,  // ptr32_sptr
     0,  // ptr32_uptr
     0,  // ptr64
-    0,  // hlsl_groupshared
+    3,  // hlsl_groupshared
     0,  // hlsl_constant
     10, // hlsl_private
     11, // hlsl_device
diff --git a/clang/test/CodeGenHLSL/group_shared.hlsl b/clang/test/CodeGenHLSL/group_shared.hlsl
index 4b2e2beba4f12..a562e75b34881 100644
--- a/clang/test/CodeGenHLSL/group_shared.hlsl
+++ b/clang/test/CodeGenHLSL/group_shared.hlsl
@@ -3,6 +3,10 @@
 // RUN:   dxil-pc-shadermodel6.3-library %s \
 // RUN:   -emit-llvm -disable-llvm-passes -o - | FileCheck %s
 
+// RUN: %clang_cc1 -std=hlsl2021 -finclude-default-header -x hlsl -triple \
+// RUN:   spirv-unknown-vulkan1.3-compute %s \
+// RUN:   -emit-llvm -disable-llvm-passes -o - | FileCheck %s
+
 // Make sure groupshared translated into address space 3.
 // CHECK:@a = addrspace(3) global [10 x float]