Changes in directory llvm/lib/Transforms/Scalar:
LICM.cpp updated: 1.78 -> 1.79 --- Log message: An sinkable instruction may exist with uses, if those uses are in dead blocks. Handle this. This fixes PR908: http://llvm.org/PR908 and Transforms/LICM/2006-09-12-DeadUserOfSunkInstr.ll --- Diffs of the changes: (+4 -0) LICM.cpp | 4 ++++ 1 files changed, 4 insertions(+) Index: llvm/lib/Transforms/Scalar/LICM.cpp diff -u llvm/lib/Transforms/Scalar/LICM.cpp:1.78 llvm/lib/Transforms/Scalar/LICM.cpp:1.79 --- llvm/lib/Transforms/Scalar/LICM.cpp:1.78 Sun Aug 27 17:42:52 2006 +++ llvm/lib/Transforms/Scalar/LICM.cpp Tue Sep 12 14:17:09 2006 @@ -447,6 +447,8 @@ if (!isExitBlockDominatedByBlockInLoop(ExitBlocks[0], I.getParent())) { // Instruction is not used, just delete it. CurAST->deleteValue(&I); + if (!I.use_empty()) // If I has users in unreachable blocks, eliminate. + I.replaceAllUsesWith(UndefValue::get(I.getType())); I.eraseFromParent(); } else { // Move the instruction to the start of the exit block, after any PHI @@ -460,6 +462,8 @@ } else if (ExitBlocks.size() == 0) { // The instruction is actually dead if there ARE NO exit blocks. CurAST->deleteValue(&I); + if (!I.use_empty()) // If I has users in unreachable blocks, eliminate. + I.replaceAllUsesWith(UndefValue::get(I.getType())); I.eraseFromParent(); } else { // Otherwise, if we have multiple exits, use the PromoteMem2Reg function to _______________________________________________ llvm-commits mailing list llvm-commits@cs.uiuc.edu http://lists.cs.uiuc.edu/mailman/listinfo/llvm-commits
