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Fix bug: SimplifyCFG/2003-08-17-BranchFoldOrdering.ll

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7921 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2003-08-17 19:41:53 +00:00
parent f0cd835784
commit 694e37f08a
2 changed files with 11 additions and 1 deletions
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6
lib/Transforms/Utils/Local.cpp
View File

@ -74,6 +74,12 @@ bool ConstantFoldTerminator(BasicBlock *BB) {
BI->setUnconditionalDest(Dest1);
return true;
}
} else if (SwitchInst *SI = dyn_cast<SwitchInst>(TI)) {
if (ConstantInt *CI = dyn_cast<ConstantInt>(SI->getCondition())) {
}
}
return false;
}

6
lib/Transforms/Utils/SimplifyCFG.cpp
View File

@ -121,6 +121,10 @@ bool SimplifyCFG(BasicBlock *BB) {
return true;
}
// Check to see if we can constant propagate this terminator instruction
// away...
bool Changed = ConstantFoldTerminator(BB);
// Check to see if this block has no non-phi instructions and only a single
// successor. If so, replace references to this basic block with references
// to the successor.
@ -251,5 +255,5 @@ bool SimplifyCFG(BasicBlock *BB) {
}
}
return false;
return Changed;
}