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| author | Hal Finkel <hfinkel@anl.gov> | 2013-09-12 04:22:31 +0000 |
|---|---|---|
| committer | Hal Finkel <hfinkel@anl.gov> | 2013-09-12 04:22:31 +0000 |
| commit | 9ec1a55a863f658292b19d7a3c167ba089134dff (patch) | |
| tree | a297dafbfac88e335c39fe9e81cabab25d80830e /lib | |
| parent | a3c2bcf0ee2f63584f7a1e9df9fa153a8b5dfea1 (diff) | |
| download | external_llvm-9ec1a55a863f658292b19d7a3c167ba089134dff.zip external_llvm-9ec1a55a863f658292b19d7a3c167ba089134dff.tar.gz external_llvm-9ec1a55a863f658292b19d7a3c167ba089134dff.tar.bz2 | |
Fix crash in AggressiveAntiDepBreaker with empty CriticalPathSet
If no register classes are added to CriticalPathRCs, then the CriticalPathSet
bitmask will be empty. In that case, ExcludeRegs must remain NULL or else this
line will cause a segfault:
} else if ((ExcludeRegs != NULL) && ExcludeRegs->test(AntiDepReg)) {
I have no in-tree test case.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190584 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/CodeGen/AggressiveAntiDepBreaker.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/CodeGen/AggressiveAntiDepBreaker.cpp b/lib/CodeGen/AggressiveAntiDepBreaker.cpp index e079707..2ee7767 100644 --- a/lib/CodeGen/AggressiveAntiDepBreaker.cpp +++ b/lib/CodeGen/AggressiveAntiDepBreaker.cpp @@ -782,7 +782,7 @@ unsigned AggressiveAntiDepBreaker::BreakAntiDependencies( if (MI == CriticalPathMI) { CriticalPathSU = CriticalPathStep(CriticalPathSU); CriticalPathMI = (CriticalPathSU) ? CriticalPathSU->getInstr() : 0; - } else { + } else if (CriticalPathSet.any()) { ExcludeRegs = &CriticalPathSet; } |