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MEGAPATCH checkin.

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For details, See: docs/2002-06-25-MegaPatchInfo.txt


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2779 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2002-06-25 16:13:24 +00:00
parent 0b12b5f50e
commit 7e70829632
80 changed files with 2899 additions and 1730 deletions
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lib/Transforms/Scalar/DCE.cpp
+8 -11
View File
@@ -28,10 +28,9 @@ namespace {
struct DeadInstElimination : public BasicBlockPass {
const char *getPassName() const { return "Dead Instruction Elimination"; }
virtual bool runOnBasicBlock(BasicBlock *BB) {
BasicBlock::InstListType &Vals = BB->getInstList();
virtual bool runOnBasicBlock(BasicBlock &BB) {
bool Changed = false;
for (BasicBlock::iterator DI = Vals.begin(); DI != Vals.end(); )
for (BasicBlock::iterator DI = BB.begin(); DI != BB.end(); )
if (dceInstruction(DI)) {
Changed = true;
++DIEEliminated;
@@ -60,7 +59,7 @@ namespace {
struct DCE : public FunctionPass {
const char *getPassName() const { return "Dead Code Elimination"; }
virtual bool runOnFunction(Function *F);
virtual bool runOnFunction(Function &F);
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.preservesCFG();
@@ -68,7 +67,7 @@ namespace {
};
}
bool DCE::runOnFunction(Function *F) {
bool DCE::runOnFunction(Function &F) {
// Start out with all of the instructions in the worklist...
std::vector<Instruction*> WorkList(inst_begin(F), inst_end(F));
std::set<Instruction*> DeadInsts;
@@ -103,16 +102,14 @@ bool DCE::runOnFunction(Function *F) {
if (DeadInsts.empty()) return false;
// Otherwise, loop over the program, removing and deleting the instructions...
for (Function::iterator I = F->begin(), E = F->end(); I != E; ++I) {
BasicBlock::InstListType &BBIL = (*I)->getInstList();
for (BasicBlock::iterator BI = BBIL.begin(); BI != BBIL.end(); )
if (DeadInsts.count(*BI)) { // Is this instruction dead?
delete BBIL.remove(BI); // Yup, remove and delete inst
for (Function::iterator I = F.begin(), E = F.end(); I != E; ++I)
for (BasicBlock::iterator BI = I->begin(); BI != I->end(); )
if (DeadInsts.count(BI)) { // Is this instruction dead?
BI = I->getInstList().erase(BI); // Yup, remove and delete inst
++DCEEliminated;
} else { // This instruction is not dead
++BI; // Continue on to the next one...
}
}
return true;
}