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Make LoopUnroll not die on LCSSA Phis. This makes lencod work again.
author
Owen Anderson
<resistor@mac.com>
Wed, 19 Jul 2006 05:45:14 +0000
(
05:45
+0000)
committer
Owen Anderson
<resistor@mac.com>
Wed, 19 Jul 2006 05:45:14 +0000
(
05:45
+0000)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29198
91177308
-0d34-0410-b5e6-
96231b3b80d8
lib/Transforms/Scalar/LoopUnroll.cpp
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diff --git
a/lib/Transforms/Scalar/LoopUnroll.cpp
b/lib/Transforms/Scalar/LoopUnroll.cpp
index 4f2a0e0b62e049dda945b5d34261c1eee4912d8f..6f7df426f16c17a32628b67f0d04cec92399cc8a 100644
(file)
--- a/
lib/Transforms/Scalar/LoopUnroll.cpp
+++ b/
lib/Transforms/Scalar/LoopUnroll.cpp
@@
-269,6
+269,12
@@
bool LoopUnroll::visitLoop(Loop *L) {
// FIXME: Should update dominator analyses
+ // Remove LCSSA Phis from the exit block
+ for (BasicBlock::iterator ExitInstr = LoopExit->begin();
+ PHINode* PN = dyn_cast<PHINode>(ExitInstr); ++ExitInstr) {
+ PN->replaceAllUsesWith(PN->getOperand(0));
+ PN->eraseFromParent();
+ }
// Now that everything is up-to-date that will be, we fold the loop block into
// the preheader and exit block, updating our analyses as we go.