[PATCH] D121913: [VP] Fix VPintrinsic::getStaticVectorLength for vp.merge|select

[Simon Moll via Phabricator via llvm-commits]

simoll created this revision.
simoll added reviewers: kaz7, rogfer01, craig.topper, frasercrmck.
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VPIntrinsic::getStaticVectorLength infers the operational vector length of a VPIntrinsic instance from a type that is used with the intrinsic. The function used the mask operand before. Yet, vp.merge|select do not have a mask operand (in the predicating sense that the other VP intrinsics are using them - it is a selection mask for them). Fallback to the return type to fix this.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D121913

Files:
  llvm/lib/IR/IntrinsicInst.cpp


Index: llvm/lib/IR/IntrinsicInst.cpp
===================================================================
--- llvm/lib/IR/IntrinsicInst.cpp
+++ llvm/lib/IR/IntrinsicInst.cpp
@@ -299,7 +299,8 @@
   };
 
   Value *VPMask = getMaskParam();
-  assert(VPMask && "No mask param?");
+  if (!VPMask)
+    return GetVectorLengthOfType(getType());
   return GetVectorLengthOfType(VPMask->getType());
 }
 


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