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author | Benjamin Kramer <benny.kra@googlemail.com> | 2009-10-02 15:59:52 +0000 |
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committer | Benjamin Kramer <benny.kra@googlemail.com> | 2009-10-02 15:59:52 +0000 |
commit | e3901ce4809ad26b8173855549cc5adbe7b29b56 (patch) | |
tree | 545f72d1e9ca939078a8dda9ef3652313417c8e4 /lib/CodeGen/PostRASchedulerList.cpp | |
parent | 30aa6a6b4bc96797d71e8c3cd542973a198124b5 (diff) | |
download | external_llvm-e3901ce4809ad26b8173855549cc5adbe7b29b56.tar.gz external_llvm-e3901ce4809ad26b8173855549cc5adbe7b29b56.tar.bz2 external_llvm-e3901ce4809ad26b8173855549cc5adbe7b29b56.zip |
Fix a use-after-free in post-ra-scheduling.
MI->addOperand invalidates references to it's operands, avoid touching
the operand after a new one was added.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83249 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/PostRASchedulerList.cpp')
-rw-r--r-- | lib/CodeGen/PostRASchedulerList.cpp | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/lib/CodeGen/PostRASchedulerList.cpp b/lib/CodeGen/PostRASchedulerList.cpp index 902f50517c..662ab01a37 100644 --- a/lib/CodeGen/PostRASchedulerList.cpp +++ b/lib/CodeGen/PostRASchedulerList.cpp @@ -884,6 +884,7 @@ bool SchedulePostRATDList::ToggleKillFlag(MachineInstr *MI, // If any subreg of MO is live, then create an imp-def for that // subreg and keep MO marked as killed. + MO.setIsKill(false); bool AllDead = true; const unsigned SuperReg = MO.getReg(); for (const unsigned *Subreg = TRI->getSubRegisters(SuperReg); @@ -898,7 +899,8 @@ bool SchedulePostRATDList::ToggleKillFlag(MachineInstr *MI, } } - MO.setIsKill(AllDead); + if(AllDead) + MO.setIsKill(true); return false; } |