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| author | Craig Topper <craig.topper@gmail.com> | 2011-10-06 06:44:41 +0000 |
|---|---|---|
| committer | Craig Topper <craig.topper@gmail.com> | 2011-10-06 06:44:41 +0000 |
| commit | 7ea16b01fad5236cc132cb5fc3e443fcbf70d3b8 (patch) | |
| tree | 7515c555821d7894f017e592ed0aa6f1fdb25400 /utils/TableGen/X86RecognizableInstr.cpp | |
| parent | cf2adb945ab8b86996424d7e6d3f742d78c91e1e (diff) | |
Fix assembling of xchg %eax, %eax to not use the NOP encoding of 0x90. This was done by creating a new register group that excludes AX registers. Fixes PR10345. Also added aliases for flipping the order of the operands of xchg <reg>, %eax.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141274 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'utils/TableGen/X86RecognizableInstr.cpp')
| -rw-r--r-- | utils/TableGen/X86RecognizableInstr.cpp | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/utils/TableGen/X86RecognizableInstr.cpp b/utils/TableGen/X86RecognizableInstr.cpp index f958966b81..ee9deb3628 100644 --- a/utils/TableGen/X86RecognizableInstr.cpp +++ b/utils/TableGen/X86RecognizableInstr.cpp @@ -1064,6 +1064,9 @@ OperandType RecognizableInstr::typeFromString(const std::string &s, TYPE("offset32", TYPE_MOFFS32) TYPE("offset64", TYPE_MOFFS64) TYPE("VR256", TYPE_XMM256) + TYPE("GR16_NOAX", TYPE_Rv) + TYPE("GR32_NOAX", TYPE_Rv) + TYPE("GR64_NOAX", TYPE_R64) errs() << "Unhandled type string " << s << "\n"; llvm_unreachable("Unhandled type string"); } @@ -1205,6 +1208,9 @@ OperandEncoding RecognizableInstr::opcodeModifierEncodingFromString ENCODING("GR64", ENCODING_RO) ENCODING("GR16", ENCODING_Rv) ENCODING("GR8", ENCODING_RB) + ENCODING("GR16_NOAX", ENCODING_Rv) + ENCODING("GR32_NOAX", ENCODING_Rv) + ENCODING("GR64_NOAX", ENCODING_RO) errs() << "Unhandled opcode modifier encoding " << s << "\n"; llvm_unreachable("Unhandled opcode modifier encoding"); } |