Changes in directory llvm/lib/Transforms/Scalar:
GVNPRE.cpp updated: 1.40 -> 1.41
---
Log message:
Handle constants in phi nodes properly. This fixes
test/Transforms/GVNPRE/2007-06-18-ConstantInPhi.ll
---
Diffs of the changes: (+10 -1)
GVNPRE.cpp | 11 ++++++++++-
1 files changed, 10 insertions(+), 1 deletion(-)
Index: llvm/lib/Transforms/Scalar/GVNPRE.cpp
diff -u llvm/lib/Transforms/Scalar/GVNPRE.cpp:1.40
llvm/lib/Transforms/Scalar/GVNPRE.cpp:1.41
--- llvm/lib/Transforms/Scalar/GVNPRE.cpp:1.40 Tue Jun 19 00:37:32 2007
+++ llvm/lib/Transforms/Scalar/GVNPRE.cpp Tue Jun 19 02:35:36 2007
@@ -927,7 +927,16 @@
for (std::set<Value*>::iterator I = S.begin(), E = S.end();
I != E; ++I) {
- if (find_leader(anticIn, VN.lookup(*I)) == 0)
+ // For non-opaque values, we should already have a value numbering.
+ // However, for opaques, such as constants within PHI nodes, it is
+ // possible that they have not yet received a number. Make sure they
do
+ // so now.
+ uint32_t valNum = 0;
+ if (isa<BinaryOperator>(*I) || isa<CmpInst>(*I))
+ valNum = VN.lookup(*I);
+ else
+ valNum = VN.lookup_or_add(*I);
+ if (find_leader(anticIn, valNum) == 0)
val_insert(anticIn, *I);
}
_______________________________________________
llvm-commits mailing list
llvm-commits@cs.uiuc.edu
http://lists.cs.uiuc.edu/mailman/listinfo/llvm-commits
