Don't bother to call commonIntCastTransforms for bitcasts; int->int

bitcasts will always be eliminated anyway.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75495 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 3 insertions, 7 deletions

diff --git a/lib/Transforms/Scalar/InstructionCombining.cpp b/lib/Transforms/Scalar/InstructionCombining.cpp
index 39ad04f..99f315f 100644
--- a/lib/Transforms/Scalar/InstructionCombining.cpp
+++ b/lib/Transforms/Scalar/InstructionCombining.cpp
@@ -8257,9 +8257,8 @@ static bool isSafeIntegerType(const Type *Ty) {
   }
 }
 
-/// Only the TRUNC, ZEXT, SEXT, and BITCAST can both operand and result as
-/// integer types. This function implements the common transforms for all those
-/// cases.
+/// Only the TRUNC, ZEXT, SEXT. This function implements the common transforms
+/// for all those cases.
 /// @brief Implement the transforms common to CastInst with integer operands
 Instruction *InstCombiner::commonIntCastTransforms(CastInst &CI) {
   if (Instruction *Result = commonCastTransforms(CI))
@@ -9004,10 +9003,7 @@ Instruction *InstCombiner::visitBitCast(BitCastInst &CI) {
   const Type *SrcTy = Src->getType();
   const Type *DestTy = CI.getType();
 
-  if (SrcTy->isInteger() && DestTy->isInteger()) {
-    if (Instruction *Result = commonIntCastTransforms(CI))
-      return Result;
-  } else if (isa<PointerType>(SrcTy)) {
+  if (isa<PointerType>(SrcTy)) {
     if (Instruction *I = commonPointerCastTransforms(CI))
       return I;
   } else {