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| author | Daniel Dunbar <daniel@zuster.org> | 2010-05-04 16:12:42 +0000 |
|---|---|---|
| committer | Daniel Dunbar <daniel@zuster.org> | 2010-05-04 16:12:42 +0000 |
| commit | c918d6043b823173b106c163038b14c1e2f92765 (patch) | |
| tree | b45b46b76644ac459a19f4ecbce52eaa6f62117b /test | |
| parent | d29f5282e06a395e696130d57aa3b1e0c73a60d4 (diff) | |
| download | external_llvm-c918d6043b823173b106c163038b14c1e2f92765.zip external_llvm-c918d6043b823173b106c163038b14c1e2f92765.tar.gz external_llvm-c918d6043b823173b106c163038b14c1e2f92765.tar.bz2 | |
MC/X86: Add "support" for matching ATT style mnemonic prefixes.
- The idea is that when a match fails, we just try to match each of +'b', +'w',
+'l'. If exactly one matches, we assume this is a mnemonic prefix and accept
it. If all match, we assume it is width generic, and take the 'l' form.
- This would be a horrible hack, if it weren't so simple. Therefore it is an
elegant solution! Chris gets the credit for this particular elegant
solution. :)
- Next step to making this more robust is to have the X86 matcher generate the
mnemonic prefix information. Ideally we would also compute up-front exactly
which mnemonic to attempt to match, but this may require more custom code in
the matcher than is really worth it.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103012 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -rw-r--r-- | test/MC/AsmParser/X86/x86_64-suffix-matching.s | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/test/MC/AsmParser/X86/x86_64-suffix-matching.s b/test/MC/AsmParser/X86/x86_64-suffix-matching.s new file mode 100644 index 0000000..9a38e1b --- /dev/null +++ b/test/MC/AsmParser/X86/x86_64-suffix-matching.s @@ -0,0 +1,8 @@ +// RUN: llvm-mc -triple x86_64 -o - %s | FileCheck %s + +// CHECK: addl $0, %eax + add $0, %eax +// CHECK: addb $255, %al + add $0xFF, %al +// CHECK: addl $0, (%rax) + add $0, 0(%rax) |