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

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bitcasts will always be eliminated anyway.

llvm-svn: 75495
This commit is contained in:
Eli Friedman 2009-07-13 20:53:00 +00:00
parent bf3719359b
commit 832f33550c
1 changed files with 3 additions and 7 deletions
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10
lib/Transforms/Scalar/InstructionCombining.cpp
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@ -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 {