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[X86] Move 'int $3' -> 'int3' handling in the assembler to processInstruction.

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Instead of handling before parsing, just fix it after parsing.
This commit is contained in:
Craig Topper 2020-10-20 14:31:47 -07:00
parent 9d591b38c9
commit 8d1db4634f
1 changed files with 11 additions and 12 deletions
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23
lib/Target/X86/AsmParser/X86AsmParser.cpp
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@ -3305,18 +3305,6 @@ bool X86AsmParser::ParseInstruction(ParseInstructionInfo &Info, StringRef Name,
return HadVerifyError;
}
// Transforms "int $3" into "int3" as a size optimization. We can't write an
// instalias with an immediate operand yet.
if (Name == "int" && Operands.size() == 2) {
X86Operand &Op1 = static_cast<X86Operand &>(*Operands[1]);
if (Op1.isImm())
if (auto *CE = dyn_cast<MCConstantExpr>(Op1.getImm()))
if (CE->getValue() == 3) {
Operands.erase(Operands.begin() + 1);
static_cast<X86Operand &>(*Operands[0]).setTokenValue("int3");
}
}
// Transforms "xlat mem8" into "xlatb"
if ((Name == "xlat" || Name == "xlatb") && Operands.size() == 2) {
X86Operand &Op1 = static_cast<X86Operand &>(*Operands[1]);
@ -3521,6 +3509,17 @@ bool X86AsmParser::processInstruction(MCInst &Inst, const OperandVector &Ops) {
Inst = TmpInst;
return true;
}
case X86::INT: {
// Transforms "int $3" into "int3" as a size optimization. We can't write an
// instalias with an immediate operand yet.
if (!Inst.getOperand(0).isImm() || Inst.getOperand(0).getImm() != 3)
return false;
MCInst TmpInst;
TmpInst.setOpcode(X86::INT3);
Inst = TmpInst;
return true;
}
}
}