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expose edge information and switch j-t to use it.

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llvm-svn: 86920
This commit is contained in:
Chris Lattner
2009-11-12 01:29:10 +00:00
parent bff25cb044
commit d5e25436a1
3 changed files with 27 additions and 2 deletions
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4
llvm/lib/Transforms/Scalar/JumpThreading.cpp
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@@ -278,7 +278,7 @@ ComputeValueKnownInPredecessors(Value *V, BasicBlock *BB,PredValueInfo &Result){
for (pred_iterator PI = pred_begin(BB), E = pred_end(BB); PI != E; ++PI) {
// If the value is known by LazyValueInfo to be a constant in a
// predecessor, use that information to try to thread this block.
Constant *PredCst = LVI->getConstant(V, *PI);
Constant *PredCst = LVI->getConstantOnEdge(V, *PI, BB);
if (PredCst == 0 ||
(!isa<ConstantInt>(PredCst) && !isa<UndefValue>(PredCst)))
continue;
@@ -384,7 +384,7 @@ ComputeValueKnownInPredecessors(Value *V, BasicBlock *BB,PredValueInfo &Result){
for (pred_iterator PI = pred_begin(BB), E = pred_end(BB); PI != E; ++PI) {
// If the value is known by LazyValueInfo to be a constant in a
// predecessor, use that information to try to thread this block.
Constant *PredCst = LVI->getConstant(Cmp->getOperand(0), *PI);
Constant *PredCst = LVI->getConstantOnEdge(Cmp->getOperand(0), *PI, BB);
if (PredCst == 0)
continue;