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* Finegrainify namespacification 

* Transform: free <ty>* (cast <ty2>* X to <ty>*) into free <ty2>* X

llvm-svn: 10303
This commit is contained in:
Chris Lattner 2003-12-07 01:24:23 +00:00
parent d1ea9cd345
commit 8427bffb9a
1 changed files with 17 additions and 4 deletions
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21
llvm/lib/Transforms/Scalar/InstructionCombining.cpp
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@ -48,8 +48,7 @@
#include "llvm/Support/CallSite.h"
#include "Support/Statistic.h"
#include <algorithm>
namespace llvm {
using namespace llvm;
namespace {
Statistic<> NumCombined ("instcombine", "Number of insts combined");
@ -104,6 +103,7 @@ namespace {
Instruction *visitPHINode(PHINode &PN);
Instruction *visitGetElementPtrInst(GetElementPtrInst &GEP);
Instruction *visitAllocationInst(AllocationInst &AI);
Instruction *visitFreeInst(FreeInst &FI);
Instruction *visitLoadInst(LoadInst &LI);
Instruction *visitBranchInst(BranchInst &BI);
@ -2044,6 +2044,20 @@ Instruction *InstCombiner::visitAllocationInst(AllocationInst &AI) {
return 0;
}
Instruction *InstCombiner::visitFreeInst(FreeInst &FI) {
Value *Op = FI.getOperand(0);
// Change free <ty>* (cast <ty2>* X to <ty>*) into free <ty2>* X
if (CastInst *CI = dyn_cast<CastInst>(Op))
if (isa<PointerType>(CI->getOperand(0)->getType())) {
FI.setOperand(0, CI->getOperand(0));
return &FI;
}
return 0;
}
/// GetGEPGlobalInitializer - Given a constant, and a getelementptr
/// constantexpr, return the constant value being addressed by the constant
/// expression, or null if something is funny.
@ -2196,8 +2210,7 @@ bool InstCombiner::runOnFunction(Function &F) {
return Changed;
}
Pass *createInstructionCombiningPass() {
Pass *llvm::createInstructionCombiningPass() {
return new InstCombiner();
}
} // End llvm namespace