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this xform is already done by the constant folder.

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llvm-svn: 40124
This commit is contained in:
Chris Lattner 2007-07-20 22:06:41 +00:00
parent cdb4e7949f
commit 9663eb4a5b
1 changed files with 1 additions and 6 deletions
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7
lib/Transforms/Scalar/InstructionCombining.cpp
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@ -6469,11 +6469,6 @@ Value *InstCombiner::EvaluateInDifferentType(Value *V, const Type *Ty,
Instruction *InstCombiner::commonCastTransforms(CastInst &CI) {
Value *Src = CI.getOperand(0);
// Casting undef to anything results in undef so might as just replace it and
// get rid of the cast.
if (isa<UndefValue>(Src)) // cast undef -> undef
return ReplaceInstUsesWith(CI, UndefValue::get(CI.getType()));
// Many cases of "cast of a cast" are eliminable. If it's eliminable we just
// eliminate it now.
if (CastInst *CSrc = dyn_cast<CastInst>(Src)) { // A->B->C cast
@ -9888,7 +9883,7 @@ static void AddReachableCodeToWorklist(BasicBlock *BB,
Inst->eraseFromParent();
continue;
}
IC.AddToWorkList(Inst);
}