Have a few places that want to simplify phi nodes use SimplifyInstruction
rather than calling hasConstantValue. No intended functionality change.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119352 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Utils/SSAUpdater.cpp b/lib/Transforms/Utils/SSAUpdater.cpp
index c855988..2b21fdf 100644
--- a/lib/Transforms/Utils/SSAUpdater.cpp
+++ b/lib/Transforms/Utils/SSAUpdater.cpp
@@ -14,6 +14,7 @@
#define DEBUG_TYPE "ssaupdater"
#include "llvm/Instructions.h"
#include "llvm/ADT/DenseMap.h"
+#include "llvm/Analysis/InstructionSimplify.h"
#include "llvm/Support/AlignOf.h"
#include "llvm/Support/Allocator.h"
#include "llvm/Support/CFG.h"
@@ -178,9 +179,9 @@
// See if the PHI node can be merged to a single value. This can happen in
// loop cases when we get a PHI of itself and one other value.
- if (Value *ConstVal = InsertedPHI->hasConstantValue()) {
+ if (Value *V = SimplifyInstruction(InsertedPHI)) {
InsertedPHI->eraseFromParent();
- return ConstVal;
+ return V;
}
// If the client wants to know about all new instructions, tell it.