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Fix PR10755 by checking for invalid predicate codes from UNPREDICTABLE t2IT instructions when decoding their successors.

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This is the last disassembly crash detected by exhaustive Thumb2 instruction space.  Major thanks to Chandler Carruth for making this kind of exhaustive testing possible.

llvm-svn: 138625
This commit is contained in:
Owen Anderson 2011-08-26 06:19:51 +00:00
parent b20cee1e19
commit 87c906dabf
1 changed files with 2 additions and 0 deletions
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lib/Target/ARM/Disassembler/ARMDisassembler.cpp
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@ -376,6 +376,8 @@ void ThumbDisassembler::AddThumbPredicate(MCInst &MI) const {
unsigned CC;
if (!ITBlock.empty()) {
CC = ITBlock.back();
if (CC == 0xF)
CC = ARMCC::AL;
ITBlock.pop_back();
} else
CC = ARMCC::AL;