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Just roll back the previous change to -mem2reg.

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Will re-think about this according to Chris's comments.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65126 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Zhou Sheng 2009-02-20 17:49:33 +00:00
parent a248c45e00
commit 3f315eb5e0
1 changed files with 0 additions and 26 deletions
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26
lib/Transforms/Utils/Mem2Reg.cpp
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@ -16,7 +16,6 @@
#include "llvm/Transforms/Scalar.h"
#include "llvm/Transforms/Utils/PromoteMemToReg.h"
#include "llvm/Transforms/Utils/UnifyFunctionExitNodes.h"
#include "llvm/IntrinsicInst.h"
#include "llvm/Analysis/Dominators.h"
#include "llvm/Instructions.h"
#include "llvm/Function.h"
@ -54,30 +53,6 @@ namespace {
char PromotePass::ID = 0;
static RegisterPass<PromotePass> X("mem2reg", "Promote Memory to Register");
/// Remove the invalid or redundant debug information.
static void CleanDbgInfo(Function& F) {
std::vector<Instruction*> DeadDbgs;
for (Function::iterator BBI = F.begin(), BBE = F.end(); BBI != BBE; ++BBI) {
if (BBI->size() <= 1)
continue;
for (BasicBlock::iterator I = BBI->begin(), E = BBI->getTerminator();
I != E; ++I) {
BasicBlock::iterator NextI = I;
++NextI;
if (isa<DbgStopPointInst>(I) && isa<DbgStopPointInst>(NextI))
DeadDbgs.push_back(I);
else if (isa<DbgStopPointInst>(I) && isa<BranchInst>(NextI))
DeadDbgs.push_back(I);
}
}
while (!DeadDbgs.empty()) {
Instruction *Inst = DeadDbgs.back();
DeadDbgs.pop_back();
Inst->eraseFromParent();
}
}
bool PromotePass::runOnFunction(Function &F) {
std::vector<AllocaInst*> Allocas;
@ -101,7 +76,6 @@ bool PromotePass::runOnFunction(Function &F) {
if (Allocas.empty()) break;
PromoteMemToReg(Allocas, DT, DF);
CleanDbgInfo(F);
NumPromoted += Allocas.size();
Changed = true;
}