Changes in directory llvm/lib/Transforms/Utils:
LoopSimplify.cpp updated: 1.68 -> 1.69
---
Log message:
Canonicalize inner loops before outer loops. Inner loop canonicalization
can provide work for the outer loop to canonicalize.
This fixes a case that breaks unswitching.
---
Diffs of the changes: (+5 -4)
LoopSimplify.cpp | 9 +++++----
1 files changed, 5 insertions(+), 4 deletions(-)
Index: llvm/lib/Transforms/Utils/LoopSimplify.cpp
diff -u llvm/lib/Transforms/Utils/LoopSimplify.cpp:1.68
llvm/lib/Transforms/Utils/LoopSimplify.cpp:1.69
--- llvm/lib/Transforms/Utils/LoopSimplify.cpp:1.68 Tue Feb 14 16:34:08 2006
+++ llvm/lib/Transforms/Utils/LoopSimplify.cpp Tue Feb 14 17:06:02 2006
@@ -115,7 +115,11 @@
///
bool LoopSimplify::ProcessLoop(Loop *L) {
bool Changed = false;
-
+ // Canonicalize inner loops before outer loops. Inner loop canonicalization
+ // can provide work for the outer loop to canonicalize.
+ for (Loop::iterator I = L->begin(), E = L->end(); I != E; ++I)
+ Changed |= ProcessLoop(*I);
+
// Check to see that no blocks (other than the header) in the loop have
// predecessors that are not in the loop. This is not valid for natural
// loops, but can occur if the blocks are unreachable. Since they are
@@ -205,9 +209,6 @@
PN->eraseFromParent();
}
- for (Loop::iterator I = L->begin(), E = L->end(); I != E; ++I)
- Changed |= ProcessLoop(*I);
-
return Changed;
}
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