[PATCH] D133852: [AMDGPU] Check for num elts in SelectVOP3PMods

[Piotr Sobczak via Phabricator via llvm-commits]

piotr created this revision.
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The rest of the code section assumes there are exactly two elements
in the vector (Lo, Hi), so add the check before entering the section.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D133852

Files:
  llvm/lib/Target/AMDGPU/AMDGPUISelDAGToDAG.cpp


Index: llvm/lib/Target/AMDGPU/AMDGPUISelDAGToDAG.cpp
===================================================================
--- llvm/lib/Target/AMDGPU/AMDGPUISelDAGToDAG.cpp
+++ llvm/lib/Target/AMDGPU/AMDGPUISelDAGToDAG.cpp
@@ -2704,7 +2704,7 @@
     Src = Src.getOperand(0);
   }
 
-  if (Src.getOpcode() == ISD::BUILD_VECTOR &&
+  if (Src.getOpcode() == ISD::BUILD_VECTOR && Src.getNumOperands() == 2 &&
       (!IsDOT || !Subtarget->hasDOTOpSelHazard())) {
     unsigned VecMods = Mods;
 


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