[llvm-commits] CVS: llvm/lib/Transforms/Utils/LCSSA.cpp
Chris Lattner
sabre at nondot.org
Tue Oct 31 09:52:32 PST 2006
Changes in directory llvm/lib/Transforms/Utils:
LCSSA.cpp updated: 1.28 -> 1.29
---
Log message:
Fix PR977: http://llvm.org/PR977 and Transforms/LCSSA/2006-10-31-UnreachableBlock.ll
---
Diffs of the changes: (+8 -1)
LCSSA.cpp | 9 ++++++++-
1 files changed, 8 insertions(+), 1 deletion(-)
Index: llvm/lib/Transforms/Utils/LCSSA.cpp
diff -u llvm/lib/Transforms/Utils/LCSSA.cpp:1.28 llvm/lib/Transforms/Utils/LCSSA.cpp:1.29
--- llvm/lib/Transforms/Utils/LCSSA.cpp:1.28 Sun Aug 27 17:42:52 2006
+++ llvm/lib/Transforms/Utils/LCSSA.cpp Tue Oct 31 11:52:18 2006
@@ -184,7 +184,14 @@
// Otherwise, patch up uses of the value with the appropriate LCSSA Phi,
// inserting PHI nodes into join points where needed.
- Value *Val = GetValueForBlock(DT->getNode(UserBB), Instr, Phis);
+ DominatorTree::Node *UserBBNode = DT->getNode(UserBB);
+
+ // If the block has no dominator info, it is unreachable.
+ Value *Val;
+ if (UserBBNode)
+ Val = GetValueForBlock(UserBBNode, Instr, Phis);
+ else
+ Val = UndefValue::get(Instr->getType());
// Preincrement the iterator to avoid invalidating it when we change the
// value.
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