[llvm-commits] CVS: llvm/lib/Transforms/Scalar/LoopUnroll.cpp

[Owen Anderson]

Changes in directory llvm/lib/Transforms/Scalar:

LoopUnroll.cpp updated: 1.20 -> 1.21
---
Log message:

Make LoopUnroll not die on LCSSA Phis.  This makes lencod work again.


---
Diffs of the changes:  (+6 -0)

 LoopUnroll.cpp |    6 ++++++
 1 files changed, 6 insertions(+)


Index: llvm/lib/Transforms/Scalar/LoopUnroll.cpp
diff -u llvm/lib/Transforms/Scalar/LoopUnroll.cpp:1.20 llvm/lib/Transforms/Scalar/LoopUnroll.cpp:1.21
--- llvm/lib/Transforms/Scalar/LoopUnroll.cpp:1.20	Wed Jun  7 16:24:10 2006
+++ llvm/lib/Transforms/Scalar/LoopUnroll.cpp	Wed Jul 19 00:45:14 2006
@@ -269,6 +269,12 @@
 
   // 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.