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| author | Eli Friedman <eli.friedman@gmail.com> | 2011-04-02 22:45:17 +0000 |
|---|---|---|
| committer | Eli Friedman <eli.friedman@gmail.com> | 2011-04-02 22:45:17 +0000 |
| commit | 71ad2c9eda710bc26ec1621a9afefad11dd7fad2 (patch) | |
| tree | 9854a19c8acd95da320530173701c38eb6b5cfac /lib | |
| parent | 6bdd261df972b5e70e4242721ab16b57c6fe3d1f (diff) | |
| download | llvm-71ad2c9eda710bc26ec1621a9afefad11dd7fad2.tar.gz llvm-71ad2c9eda710bc26ec1621a9afefad11dd7fad2.tar.bz2 llvm-71ad2c9eda710bc26ec1621a9afefad11dd7fad2.tar.xz | |
PR9446: RecursivelyDeleteTriviallyDeadInstructions can delete the instruction
after the given instruction; make sure to handle that case correctly.
(It's difficult to trigger; the included testcase involves a dead
block, but I don't think that's a requirement.)
While I'm here, get rid of the unnecessary warning about
SimplifyInstructionsInBlock, since it should work correctly as far as I know.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128782 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Transforms/Utils/Local.cpp | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/lib/Transforms/Utils/Local.cpp b/lib/Transforms/Utils/Local.cpp index 47ef1c9174..26ae295d5d 100644 --- a/lib/Transforms/Utils/Local.cpp +++ b/lib/Transforms/Utils/Local.cpp @@ -332,8 +332,11 @@ bool llvm::SimplifyInstructionsInBlock(BasicBlock *BB, const TargetData *TD) { BI = BB->begin(); continue; } - + + WeakVH BIHandle(BI); MadeChange |= RecursivelyDeleteTriviallyDeadInstructions(Inst); + if (BIHandle != BI) + BI = BB->begin(); } return MadeChange; } |