[PATCH] D123224: [x86] Replace getNodeIfExists to doesNodeExist when only check node exist

[chenglin.bi via Phabricator via llvm-commits]

bcl5980 created this revision.
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getNodeIfExists will clear original node flags, so if we only check node exist or not we should use doesNodeExist


https://reviews.llvm.org/D123224

Files:
  llvm/lib/Target/X86/X86ISelLowering.cpp


Index: llvm/lib/Target/X86/X86ISelLowering.cpp
===================================================================
--- llvm/lib/Target/X86/X86ISelLowering.cpp
+++ llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -23397,7 +23397,7 @@
     return true;
 
   // We never want to use both SQRT and RSQRT instructions for the same input.
-  if (DAG.getNodeIfExists(X86ISD::FRSQRT, DAG.getVTList(VT), Op))
+  if (DAG.doesNodeExist(X86ISD::FRSQRT, DAG.getVTList(VT), Op))
     return false;
 
   if (VT.isVector())


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