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Nested IT blocks are UNPREDICTABLE. Mark them as such when disassembling them.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139736 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson 2011-09-14 21:06:21 +00:00
parent 64944f48a1
commit 34626acf7f
1 changed files with 4 additions and 0 deletions
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4
lib/Target/ARM/Disassembler/ARMDisassembler.cpp
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@ -567,6 +567,10 @@ DecodeStatus ThumbDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
// code and mask operands so that we can apply them correctly
// to the subsequent instructions.
if (MI.getOpcode() == ARM::t2IT) {
// Nested IT blocks are UNPREDICTABLE.
if (!ITBlock.empty())
return MCDisassembler::SoftFail;
// (3 - the number of trailing zeros) is the number of then / else.
unsigned firstcond = MI.getOperand(0).getImm();
unsigned Mask = MI.getOperand(1).getImm();