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| author | Benjamin Kramer <benny.kra@googlemail.com> | 2009-08-16 11:56:42 +0000 |
|---|---|---|
| committer | Benjamin Kramer <benny.kra@googlemail.com> | 2009-08-16 11:56:42 +0000 |
| commit | 9ae7d44d95de16be5ed7bea7e1117160d9e2d5ce (patch) | |
| tree | 41d4f0d271cc78d6437d7f260d07e1078396f82a /lib/Target/ARM/Thumb2SizeReduction.cpp | |
| parent | 80c76436fe22a5481fac2cafe3c0a652fa6ddb31 (diff) | |
Fix use after free in Thumb2SizeReduction (PR4707). A MachineInstr was used after erasure.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79189 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/ARM/Thumb2SizeReduction.cpp')
| -rw-r--r-- | lib/Target/ARM/Thumb2SizeReduction.cpp | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/lib/Target/ARM/Thumb2SizeReduction.cpp b/lib/Target/ARM/Thumb2SizeReduction.cpp index b3ed8e84f9..e6f45bb5ca 100644 --- a/lib/Target/ARM/Thumb2SizeReduction.cpp +++ b/lib/Target/ARM/Thumb2SizeReduction.cpp @@ -654,8 +654,11 @@ bool Thumb2SizeReduce::ReduceMBB(MachineBasicBlock &MBB) { } // Try to transform ro a 16-bit non-two-address instruction. - if (Entry.NarrowOpc1 && ReduceToNarrow(MBB, MI, Entry, LiveCPSR)) + if (Entry.NarrowOpc1 && ReduceToNarrow(MBB, MI, Entry, LiveCPSR)) { Modified = true; + MachineBasicBlock::iterator I = prior(NextMII); + MI = &*I; + } } ProcessNext: |