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implement aliases for shld/shrd, part of rdar://8418316

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@113937 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2010-09-15 04:37:18 +00:00
parent e9e16a36d9
commit cfad564043
2 changed files with 20 additions and 0 deletions
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9
lib/Target/X86/AsmParser/X86AsmParser.cpp
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@ -833,6 +833,15 @@ ParseInstruction(StringRef Name, SMLoc NameLoc,
Operands.push_back(X86Operand::CreateImm(One, NameLoc, NameLoc));
std::swap(Operands[1], Operands[2]);
}
// FIXME: Hack to handle recognize "sh[lr]d op,op" -> "shld $1, op,op".
if ((Name.startswith("shld") || Name.startswith("shrd")) &&
Operands.size() == 3) {
const MCExpr *One = MCConstantExpr::Create(1, getParser().getContext());
Operands.insert(Operands.begin()+1,
X86Operand::CreateImm(One, NameLoc, NameLoc));
}
// FIXME: Hack to handle recognize "in[bwl] <op>". Canonicalize it to
// "inb <op>, %al".

11
test/MC/AsmParser/X86/x86_instructions.s
View File

@ -268,3 +268,14 @@ rcl %bl
rcll 0xdeadbeef(%ebx,%ecx,8)
rcr %ecx
rcrl 0x12345678
// rdar://8418316
// CHECK: shldw $1, %bx, %bx
// CHECK: shldw $1, %bx, %bx
// CHECK: shrdw $1, %bx, %bx
// CHECK: shrdw $1, %bx, %bx
shld %bx,%bx
shld $1, %bx,%bx
shrd %bx,%bx
shrd $1, %bx,%bx