From 34626acf7fb042c3a831e2f7dfb653ea79c7adec Mon Sep 17 00:00:00 2001 From: Owen Anderson Date: Wed, 14 Sep 2011 21:06:21 +0000 Subject: Nested IT blocks are UNPREDICTABLE. Mark them as such when disassembling them. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139736 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Target/ARM/Disassembler/ARMDisassembler.cpp | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'lib/Target') diff --git a/lib/Target/ARM/Disassembler/ARMDisassembler.cpp b/lib/Target/ARM/Disassembler/ARMDisassembler.cpp index 9d4449a4aa..6b86e41c45 100644 --- a/lib/Target/ARM/Disassembler/ARMDisassembler.cpp +++ b/lib/Target/ARM/Disassembler/ARMDisassembler.cpp @@ -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(); -- cgit v1.2.3