[clang] [llvm] [AMDGPU] Adding the amdgpu-num-work-groups function attribute (PR #79035)

[Jun Wang via cfe-commits]

================
@@ -8069,6 +8069,25 @@ static void handleAMDGPUNumVGPRAttr(Sema &S, Decl *D, 
const ParsedAttr &AL) {
   D->addAttr(::new (S.Context) AMDGPUNumVGPRAttr(S.Context, AL, NumVGPR));
 }
 
+static void handleAMDGPUNumWorkGroupsAttr(Sema &S, Decl *D,
+                                          const ParsedAttr &AL) {
+  uint32_t NumWGX = 0;
+  uint32_t NumWGY = 0;
+  uint32_t NumWGZ = 0;
+  Expr *NumWGXExpr = AL.getArgAsExpr(0);
+  Expr *NumWGYExpr = AL.getArgAsExpr(1);
+  Expr *NumWGZExpr = AL.getArgAsExpr(2);
+  if (!checkUInt32Argument(S, AL, NumWGXExpr, NumWGX))
+    return;
+  if (!checkUInt32Argument(S, AL, NumWGYExpr, NumWGY))
+    return;
+  if (!checkUInt32Argument(S, AL, NumWGZExpr, NumWGZ))
+    return;
+
+  D->addAttr(::new (S.Context) AMDGPUNumWorkGroupsAttr(S.Context, AL, NumWGX,
----------------
jwanggit86 wrote:

Add check in this function to ensure `addAttr` is called only when none of the 
3 numbers are 0. The check in AMDGPU.cpp is removed.

https://github.com/llvm/llvm-project/pull/79035
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