[llvm-commits] CVS: llvm/lib/Transforms/Scalar/ADCE.cpp
Chris Lattner
lattner at cs.uiuc.edu
Sun Oct 17 16:45:17 PDT 2004
Changes in directory llvm/lib/Transforms/Scalar:
ADCE.cpp updated: 1.82 -> 1.83
---
Log message:
Getting ADCE to interact well with unreachable instructions seems like a nontrivial
exercise that I'm not interested in tackling right now. Just punt and treat them
like unwind's.
This 'fixes' test/Regression/Transforms/ADCE/unreachable-function.ll
---
Diffs of the changes: (+3 -2)
Index: llvm/lib/Transforms/Scalar/ADCE.cpp
diff -u llvm/lib/Transforms/Scalar/ADCE.cpp:1.82 llvm/lib/Transforms/Scalar/ADCE.cpp:1.83
--- llvm/lib/Transforms/Scalar/ADCE.cpp:1.82 Sat Oct 16 13:09:25 2004
+++ llvm/lib/Transforms/Scalar/ADCE.cpp Sun Oct 17 18:45:06 2004
@@ -233,8 +233,9 @@
markInstructionLive(I);
}
} else if (I->mayWriteToMemory() || isa<ReturnInst>(I) ||
- isa<UnwindInst>(I)) {
- // Unreachable instructions are not marked intrinsically live here.
+ isa<UnwindInst>(I) || isa<UnreachableInst>(I)) {
+ // FIXME: Unreachable instructions should not be marked intrinsically
+ // live here.
markInstructionLive(I);
} else if (isInstructionTriviallyDead(I)) {
// Remove the instruction from it's basic block...
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