Changes in directory llvm/lib/Transforms/Scalar:
InstructionCombining.cpp updated: 1.492 -> 1.493
---
Log message:
Fix Transforms/InstCombine/2006-06-28-infloop.ll
---
Diffs of the changes: (+6 -0)
InstructionCombining.cpp | 6 ++++++
1 files changed, 6 insertions(+)
Index: llvm/lib/Transforms/Scalar/InstructionCombining.cpp
diff -u llvm/lib/Transforms/Scalar/InstructionCombining.cpp:1.492
llvm/lib/Transforms/Scalar/InstructionCombining.cpp:1.493
--- llvm/lib/Transforms/Scalar/InstructionCombining.cpp:1.492 Tue Jun 27
20:01:52 2006
+++ llvm/lib/Transforms/Scalar/InstructionCombining.cpp Wed Jun 28 12:34:50 2006
@@ -4934,6 +4934,12 @@
// If this is a cast from the destination type, we can trivially eliminate
// it, and this will remove a cast overall.
if (I->getOperand(0)->getType() == Ty) {
+ // If the first operand is itself a cast, and is eliminable, do not count
+ // this as an eliminable cast. We would prefer to eliminate those two
+ // casts first.
+ if (CastInst *OpCast = dyn_cast<CastInst>(I->getOperand(0)))
+ return true;
+
++NumCastsRemoved;
return true;
}
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