[llvm-branch-commits] [llvm] [AMDGPU] Disable VALU sinking and hoisting with WWM (PR #123124)

[Diana Picus via llvm-branch-commits]

================
@@ -2773,6 +2773,9 @@ void AMDGPUDAGToDAGISel::SelectINTRINSIC_WO_CHAIN(SDNode 
*N) {
   case Intrinsic::amdgcn_wwm:
   case Intrinsic::amdgcn_strict_wwm:
     Opcode = AMDGPU::STRICT_WWM;
+    CurDAG->getMachineFunction()
+        .getInfo<SIMachineFunctionInfo>()
+        ->setInitWholeWave();
----------------
rovka wrote:

I would not recommend using HasInitWholeWave for this. That has a very narrow 
meaning referring only to the use of the llvm.amdgcn.init.whole.wave intrinsic, 
not WWM in general. 

https://github.com/llvm/llvm-project/pull/123124
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