Changes in directory llvm/lib/Transforms/Scalar:
LoopUnswitch.cpp updated: 1.70 -> 1.71
---
Log message:
If a condition is not inside a loop then the condition is suitable
to loop unswitch candidate for the loop.
---
Diffs of the changes: (+7 -0)
LoopUnswitch.cpp | 7 +++++++
1 files changed, 7 insertions(+)
Index: llvm/lib/Transforms/Scalar/LoopUnswitch.cpp
diff -u llvm/lib/Transforms/Scalar/LoopUnswitch.cpp:1.70
llvm/lib/Transforms/Scalar/LoopUnswitch.cpp:1.71
--- llvm/lib/Transforms/Scalar/LoopUnswitch.cpp:1.70 Tue Jun 5 19:21:03 2007
+++ llvm/lib/Transforms/Scalar/LoopUnswitch.cpp Wed Jun 27 19:44:10 2007
@@ -128,6 +128,13 @@
static Value *FindLIVLoopCondition(Value *Cond, Loop *L, bool &Changed) {
// Constants should be folded, not unswitched on!
if (isa<Constant>(Cond)) return false;
+
+ // If cond is not in loop then it is not suitable.
+ if (Instruction *I = dyn_cast<Instruction>(Cond))
+ if (!L->contains(I->getParent()))
+ return 0;
+ if (isa<Argument>(Cond))
+ return 0;
// TODO: Handle: br (VARIANT|INVARIANT).
// TODO: Hoist simple expressions out of loops.
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