89e4abe7b7
[X86][Disassembler] Fix LOCK prefix disassembler support
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Summary:
If LOCK prefix is not the first prefix in an instruction, LLVM
disassembler silently drops the prefix.
The fix is to select a proper instruction with a builtin LOCK prefix if
one exists.
Reviewers: craig.topper
Reviewed By: craig.topper
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D49001
llvm-svn: 336400
2018-07-05 23:32:42 +00:00
72f40041f6
[MC][X86] Add test case from PR19251
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llvm-svn: 318605
2017-11-18 23:23:25 +00:00
0916c6b654
Fix for Bug 34475 - LOCK/REP/REPNE prefixes emitted as instruction on their own.
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Differential Revision: https://reviews.llvm.org/D39546
llvm-svn: 317330
2017-11-03 15:25:13 +00:00
bfc9061593
This patch is a result of D37262: The issues with X86 prefixes. It closes PR7709, PR17697, PR19251, PR32809 and PR21640. There could be other bugs closed by this patch.
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llvm-svn: 315899
2017-10-16 11:14:29 +00:00
5bea524091
Revert "The current version of LLVM X86 disassembler incorrectly interprets some possible sets of x86 prefixes. This patch is the first step to close PR7709 and PR17697. There will be next patch(es) to close relative PRs." temporarily while some regressions are addressed.
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This reverts commit r311882.
llvm-svn: 311987
2017-08-29 08:23:46 +00:00
574962a3b3
The current version of LLVM X86 disassembler incorrectly interprets some possible sets of x86 prefixes. This patch is the first step to close PR7709 and PR17697. There will be next patch(es) to close relative PRs.
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Differential Revision: https://reviews.llvm.org/D36788
M lib/Target/X86/Disassembler/X86DisassemblerDecoder.cpp
M lib/Target/X86/Disassembler/X86DisassemblerDecoder.h
A test/MC/Disassembler/X86/prefixes-i386.s
A test/MC/Disassembler/X86/prefixes-x86_64.s
M test/MC/Disassembler/X86/prefixes.txt
llvm-svn: 311882
2017-08-28 10:43:14 +00:00
ae8e1b3831
[X86] Disassembler support for move to/from %rax with a 32-bit memory offset is REX.W and AdSize prefix are both present.
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llvm-svn: 225099
2015-01-03 00:00:20 +00:00
c4b12166f2
[X86] Add the debug registers DR8-DR15 so we can assemble and disassemble references to them.
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llvm-svn: 224862
2014-12-26 18:20:05 +00:00
d5b39237a1
[X86] Don't fail disassembly if REX.R/REX.B is used on an MMX register. Similar fix to not fail to disassembler CR9-CR15 references.
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llvm-svn: 224861
2014-12-26 18:19:44 +00:00
8ac0bf96f0
X86Disassembler - fixed a bug in immediate print
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llvm-svn: 206953
2014-04-23 07:21:04 +00:00
576ee003d0
Fixed a bug where diassembling an instruction that had a prefix would cause LLVM to identify a 1-byte instruction, but then upon querying it for that 1-byte instruction would cause an undefined opcode.
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llvm-svn: 189698
2013-08-30 21:19:48 +00:00
Maksim Panchenko