Changes in directory llvm/lib/CodeGen:
IfConversion.cpp updated: 1.48 -> 1.49
---
Log message:
If BB is predicated, invalidate its predecessor(s) which would if-convert it.
It needs to be re-analyzed.
---
Diffs of the changes: (+7 -3)
IfConversion.cpp | 10 +++++++---
1 files changed, 7 insertions(+), 3 deletions(-)
Index: llvm/lib/CodeGen/IfConversion.cpp
diff -u llvm/lib/CodeGen/IfConversion.cpp:1.48
llvm/lib/CodeGen/IfConversion.cpp:1.49
--- llvm/lib/CodeGen/IfConversion.cpp:1.48 Thu Jun 14 16:26:08 2007
+++ llvm/lib/CodeGen/IfConversion.cpp Thu Jun 14 18:13:19 2007
@@ -656,15 +656,19 @@
}
/// ReTryPreds - Invalidate predecessor BB info so it would be re-analyzed
-/// to determine if it can be if-converted.
+/// to determine if it can be if-converted. If predecessor is already
+/// enqueud, dequeue it!
void IfConverter::ReTryPreds(MachineBasicBlock *BB) {
for (MachineBasicBlock::pred_iterator PI = BB->pred_begin(),
E = BB->pred_end(); PI != E; ++PI) {
BBInfo &PBBI = BBAnalysis[(*PI)->getNumber()];
- if (!PBBI.IsDone && PBBI.Kind == ICNotClassfied) {
+ if (PBBI.IsDone)
+ continue;
+ if (PBBI.Kind == ICNotClassfied) {
assert(!PBBI.IsEnqueued && "Unexpected");
PBBI.IsAnalyzed = false;
- }
+ } else if (PBBI.IsEnqueued && PBBI.BB != BB)
+ PBBI.IsEnqueued = false;
}
}
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