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MC/X86: Add custom hack for recognizing "imul $12, %eax" and friends.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111947 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Daniel Dunbar 2010-08-24 19:24:18 +00:00
parent e17edff28f
commit ae528f65ba
2 changed files with 11 additions and 0 deletions
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8
lib/Target/X86/AsmParser/X86AsmParser.cpp
View File

@ -826,6 +826,14 @@ ParseInstruction(StringRef Name, SMLoc NameLoc,
Operands.erase(Operands.begin() + 2);
}
// FIXME: Hack to handle "imul A, B" which is an alias for "imul A, B, B".
if (Name.startswith("imul") && Operands.size() == 3 &&
static_cast<X86Operand*>(Operands.back())->isReg()) {
X86Operand *Op = static_cast<X86Operand*>(Operands.back());
Operands.push_back(X86Operand::CreateReg(Op->getReg(), Op->getStartLoc(),
Op->getEndLoc()));
}
return false;
}

3
test/MC/AsmParser/X86/x86_instructions.s
View File

@ -158,3 +158,6 @@ INT3
// CHECK: movaps %xmm3, (%esi)
// CHECK-STDERR: warning: scale factor without index register is ignored
movaps %xmm3, (%esi, 2)
// CHECK: imull $12, %eax, %eax
imul $12, %eax