Changes in directory llvm/lib/Transforms/Scalar:
InstructionCombining.cpp updated: 1.642 -> 1.643
---
Log message:
Speed up -instcombine by 20% by avoiding a particularly expensive passmgr call.
---
Diffs of the changes: (+4 -1)
InstructionCombining.cpp | 5 ++++-
1 files changed, 4 insertions(+), 1 deletion(-)
Index: llvm/lib/Transforms/Scalar/InstructionCombining.cpp
diff -u llvm/lib/Transforms/Scalar/InstructionCombining.cpp:1.642
llvm/lib/Transforms/Scalar/InstructionCombining.cpp:1.643
--- llvm/lib/Transforms/Scalar/InstructionCombining.cpp:1.642 Fri Mar 2
23:27:34 2007
+++ llvm/lib/Transforms/Scalar/InstructionCombining.cpp Sat Mar 3 22:27:24 2007
@@ -74,6 +74,7 @@
std::vector<Instruction*> Worklist;
DenseMap<Instruction*, unsigned> WorklistMap;
TargetData *TD;
+ bool MustPreserveLCSSA;
public:
/// AddToWorkList - Add the specified instruction to the worklist if it
/// isn't already in it.
@@ -7685,7 +7686,7 @@
//
Instruction *InstCombiner::visitPHINode(PHINode &PN) {
// If LCSSA is around, don't mess with Phi nodes
- if (mustPreserveAnalysisID(LCSSAID)) return 0;
+ if (MustPreserveLCSSA) return 0;
if (Value *V = PN.hasConstantValue())
return ReplaceInstUsesWith(PN, V);
@@ -9344,6 +9345,8 @@
bool InstCombiner::runOnFunction(Function &F) {
+ MustPreserveLCSSA = mustPreserveAnalysisID(LCSSAID);
+
bool EverMadeChange = false;
// Iterate while there is work to do.
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