Changes in directory llvm/lib/CodeGen:
LiveVariables.cpp updated: 1.69 -> 1.70
---
Log message:
If a virtual register is already marked alive in this block, that means it is
alive in one of the successor block. Do not add it to the kill list.
---
Diffs of the changes: (+6 -1)
LiveVariables.cpp | 7 ++++++-
1 files changed, 6 insertions(+), 1 deletion(-)
Index: llvm/lib/CodeGen/LiveVariables.cpp
diff -u llvm/lib/CodeGen/LiveVariables.cpp:1.69
llvm/lib/CodeGen/LiveVariables.cpp:1.70
--- llvm/lib/CodeGen/LiveVariables.cpp:1.69 Fri Mar 9 00:02:17 2007
+++ llvm/lib/CodeGen/LiveVariables.cpp Fri Mar 9 03:48:56 2007
@@ -152,7 +152,12 @@
"Should have kill for defblock!");
// Add a new kill entry for this basic block.
- VRInfo.Kills.push_back(MI);
+ unsigned BBNum = MBB->getNumber();
+ // If this virtual register is already marked as alive in this basic block,
+ // that means it is alive in at least one of the successor block, it's not
+ // a kill.
+ if (VRInfo.AliveBlocks.size() <= BBNum || !VRInfo.AliveBlocks[BBNum])
+ VRInfo.Kills.push_back(MI);
// Update all dominating blocks to mark them known live.
for (MachineBasicBlock::const_pred_iterator PI = MBB->pred_begin(),
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