6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-07-16 11:24:39 +00:00
Code Issues Projects Releases Wiki Activity

Simplify logic further.

Browse Source 
Ensure that we copy KnownProperties before calling visitBasicBlock, else
we may leak properties into blocks where they don't belong.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30705 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nick Lewycky
2006-10-03 17:36:01 +00:00
parent cd71da5cf0
commit f938099aa1
1 changed files with 8 additions and 17 deletions
Download Patch File Download Diff File Expand all files Collapse all files

25
lib/Transforms/Scalar/PredicateSimplifier.cpp
View File

@@ -650,31 +650,22 @@ void PredicateSimplifier::visit(BranchInst *BI, PropertySet &KP) {
BasicBlock *TrueDest = BI->getSuccessor(0), BasicBlock *TrueDest = BI->getSuccessor(0),
*FalseDest = BI->getSuccessor(1); *FalseDest = BI->getSuccessor(1);
if (Condition == ConstantBool::getTrue() || TrueDest == FalseDest) { if (isa<ConstantBool>(Condition) || TrueDest == FalseDest) {
proceedToSuccessors(KP, BB);
return;
} else if (Condition == ConstantBool::getFalse()) {
proceedToSuccessors(KP, BB); proceedToSuccessors(KP, BB);
return; return;
} }
DTNodeType *Node = DT->getNode(BB); DTNodeType *Node = DT->getNode(BB);
for (DTNodeType::iterator I = Node->begin(), E = Node->end(); I != E; ++I) { for (DTNodeType::iterator I = Node->begin(), E = Node->end(); I != E; ++I) {
if ((*I)->getBlock() == TrueDest) { BasicBlock *Dest = (*I)->getBlock();
PropertySet TrueProperties(KP); PropertySet DestProperties(KP);
TrueProperties.addEqual(ConstantBool::getTrue(), Condition);
visitBasicBlock(TrueDest, TrueProperties);
continue;
}
if ((*I)->getBlock() == FalseDest) { if (Dest == TrueDest)
PropertySet FalseProperties(KP); DestProperties.addEqual(ConstantBool::getTrue(), Condition);
FalseProperties.addEqual(ConstantBool::getFalse(), Condition); else if (Dest == FalseDest)
visitBasicBlock(FalseDest, FalseProperties); DestProperties.addEqual(ConstantBool::getFalse(), Condition);
continue;
}
visitBasicBlock((*I)->getBlock(), KP); visitBasicBlock(Dest, DestProperties);
} }
} }