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MC: Improve expression parsing and implement evaluation of absolute expressions.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74448 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Daniel Dunbar
2009-06-29 20:37:27 +00:00
parent cffddcd726
commit 475839e9a9
6 changed files with 216 additions and 63 deletions
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7
tools/llvm-mc/MC-X86Specific.cpp
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@@ -87,7 +87,7 @@ bool AsmParser::ParseX86Operand(X86Operand &Op) {
// $42 -> immediate.
Lexer.Lex();
int64_t Val;
if (ParseExpression(Val))
if (ParseAbsoluteExpression(Val))
return TokError("expected integer constant");
Op = X86Operand::CreateReg(Val);
return false;
@@ -118,7 +118,7 @@ bool AsmParser::ParseX86MemOperand(X86Operand &Op) {
// it.
int64_t Disp = 0;
if (Lexer.isNot(asmtok::LParen)) {
if (ParseExpression(Disp)) return true;
if (ParseAbsoluteExpression(Disp)) return true;
// After parsing the base expression we could either have a parenthesized
// memory address or not. If not, return now. If so, eat the (.
@@ -139,8 +139,7 @@ bool AsmParser::ParseX86MemOperand(X86Operand &Op) {
// memory operand consumed.
} else {
// It must be an parenthesized expression, parse it now.
if (ParseParenExpr(Disp) ||
ParseBinOpRHS(1, Disp))
if (ParseAbsoluteExpression(Disp))
return true;
// After parsing the base expression we could either have a parenthesized