diff options
| author | Benjamin Kramer <benny.kra@googlemail.com> | 2009-10-02 15:59:52 +0000 |
|---|---|---|
| committer | Benjamin Kramer <benny.kra@googlemail.com> | 2009-10-02 15:59:52 +0000 |
| commit | 8bff4af61219031345e7dae0c1840315e6bfab7f (patch) | |
| tree | 545f72d1e9ca939078a8dda9ef3652313417c8e4 /lib/CodeGen/PostRASchedulerList.cpp | |
| parent | e1b691f208ca502b55e2142d9b5a2c074b36fee7 (diff) | |
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; } |