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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 | 2c64130c4320b2bb53db71f737faadd0cc493cd3 (patch) | |
| tree | f3ccc1ac40def79f7fe3b73581d2e79b849a55d8 /llvm/lib | |
| parent | 195fd9d97011a43718032ae61fc19bac313cabd9 (diff) | |
| download | bcm5719-llvm-2c64130c4320b2bb53db71f737faadd0cc493cd3.tar.gz bcm5719-llvm-2c64130c4320b2bb53db71f737faadd0cc493cd3.zip | |
Fix use after free in Thumb2SizeReduction (PR4707). A MachineInstr was used after erasure.
llvm-svn: 79189
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Target/ARM/Thumb2SizeReduction.cpp | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/llvm/lib/Target/ARM/Thumb2SizeReduction.cpp b/llvm/lib/Target/ARM/Thumb2SizeReduction.cpp index b3ed8e84f92..e6f45bb5ca9 100644 --- a/llvm/lib/Target/ARM/Thumb2SizeReduction.cpp +++ b/llvm/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: |
