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* Fix bug: test/Regression/Other/2002-03-11-LevelRaiseIterInvalidate.ll

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* Use more concise form of ReplaceInstWithInst to make code simpler
* Output nicer message for dead code eliminated when debugging


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@1861 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2002-03-11 22:19:48 +00:00
parent 1340f7671c
commit b24196f5ae
1 changed files with 4 additions and 10 deletions
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14
lib/Transforms/LevelRaise.cpp
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@ -85,25 +85,19 @@ static bool HandleCastToPointer(BasicBlock::iterator BI,
// If we have a getelementptr capability... transform all of the // If we have a getelementptr capability... transform all of the
// add instruction uses into getelementptr's. // add instruction uses into getelementptr's.
for (Value::use_iterator UI = CI->use_begin(), E = CI->use_end(); while (!CI->use_empty()) {
UI != E; ++UI) { Instruction *I = cast<Instruction>(*CI->use_begin());
Instruction *I = cast<Instruction>(*UI);
assert(I->getOpcode() == Instruction::Add && I->getNumOperands() == 2 && assert(I->getOpcode() == Instruction::Add && I->getNumOperands() == 2 &&
"Use is not a valid add instruction!"); "Use is not a valid add instruction!");
// Get the value added to the cast result pointer... // Get the value added to the cast result pointer...
Value *OtherPtr = I->getOperand((I->getOperand(0) == CI) ? 1 : 0); Value *OtherPtr = I->getOperand((I->getOperand(0) == CI) ? 1 : 0);
BasicBlock *BB = I->getParent();
BasicBlock::iterator AddIt = find(BB->getInstList().begin(),
BB->getInstList().end(), I);
GetElementPtrInst *GEP = new GetElementPtrInst(OtherPtr, Indices); GetElementPtrInst *GEP = new GetElementPtrInst(OtherPtr, Indices);
PRINT_PEEPHOLE1("cast-add-to-gep:i", I); PRINT_PEEPHOLE1("cast-add-to-gep:i", I);
// Replace the old add instruction with the shiny new GEP inst // Replace the old add instruction with the shiny new GEP inst
ReplaceInstWithInst(BB->getInstList(), AddIt, GEP); ReplaceInstWithInst(I, GEP);
PRINT_PEEPHOLE1("cast-add-to-gep:o", GEP); PRINT_PEEPHOLE1("cast-add-to-gep:o", GEP);
} }
return true; return true;
@ -417,7 +411,7 @@ static bool DoRaisePass(Method *M) {
if (dceInstruction(BIL, BI) || doConstantPropogation(BB, BI)) { if (dceInstruction(BIL, BI) || doConstantPropogation(BB, BI)) {
Changed = true; Changed = true;
#ifdef DEBUG_PEEPHOLE_INSTS #ifdef DEBUG_PEEPHOLE_INSTS
cerr << "DeadCode Elinated!\n"; cerr << "***\t\t^^-- DeadCode Elinated!\n";
#endif #endif
} else if (PeepholeOptimize(BB, BI)) } else if (PeepholeOptimize(BB, BI))
Changed = true; Changed = true;