[PATCH] D104049: [AMDGPU] [CodeGen] Fold negate llvm.amdgcn.class into test mask

[Anshil Gandhi via Phabricator via llvm-commits]

gandhi21299 marked 6 inline comments as done.
gandhi21299 added inline comments.


================
Comment at: llvm/lib/Target/AMDGPU/AMDGPUCodeGenPrepare.cpp:1452-1463
+      if (isa<TruncInst>(ExtCall))
+        IntrinsicCall =
+            dyn_cast<CallInst>(cast<TruncInst>(ExtCall)->getOperand(0));
+      else if (isa<SExtInst>(ExtCall))
+        IntrinsicCall =
+            dyn_cast<CallInst>(cast<SExtInst>(ExtCall)->getOperand(0));
+      else if (isa<ZExtInst>(ExtCall))
----------------
arsenm wrote:
> I don't know why you are looking at all of these extensions. The xor should directly consume the call
I am considering the case where the result from the class intrinsic is extended/truncated for some reason. Is it possible to get the IntrinsicInst directly from the xor operand?


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  https://reviews.llvm.org/D104049/new/

https://reviews.llvm.org/D104049