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correct target directive handling error handling

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The target specific parser should return `false' if the target AsmParser handles
the directive, and `true' if the generic parser should handle the directive.
Many of the target specific directive handlers would `return Error' which does
not follow these semantics.  This change simply changes the target specific
routines to conform to the semantis of the ParseDirective correctly.

Conformance to the semantics improves diagnostics emitted for the invalid
directives.  X86 is taken as a sample to ensure that multiple diagnostics are
not presented for a single error.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199068 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Saleem Abdulrasool
2014-01-13 01:15:39 +00:00
parent 2d81106fa0
commit b6e0946d40
6 changed files with 119 additions and 64 deletions
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56
lib/Target/PowerPC/AsmParser/PPCAsmParser.cpp
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@@ -1373,7 +1373,7 @@ bool PPCAsmParser::ParseDirectiveWord(unsigned Size, SMLoc L) {
for (;;) {
const MCExpr *Value;
if (getParser().parseExpression(Value))
return true;
return false;
getParser().getStreamer().EmitValue(Value, Size);
@@ -1397,8 +1397,10 @@ bool PPCAsmParser::ParseDirectiveTC(unsigned Size, SMLoc L) {
while (getLexer().isNot(AsmToken::EndOfStatement)
&& getLexer().isNot(AsmToken::Comma))
Parser.Lex();
if (getLexer().isNot(AsmToken::Comma))
return Error(L, "unexpected token in directive");
if (getLexer().isNot(AsmToken::Comma)) {
Error(L, "unexpected token in directive");
return false;
}
Parser.Lex();
// Align to word size.
@@ -1412,8 +1414,10 @@ bool PPCAsmParser::ParseDirectiveTC(unsigned Size, SMLoc L) {
/// ::= .machine [ cpu | "push" | "pop" ]
bool PPCAsmParser::ParseDirectiveMachine(SMLoc L) {
if (getLexer().isNot(AsmToken::Identifier) &&
getLexer().isNot(AsmToken::String))
return Error(L, "unexpected token in directive");
getLexer().isNot(AsmToken::String)) {
Error(L, "unexpected token in directive");
return false;
}
StringRef CPU = Parser.getTok().getIdentifier();
Parser.Lex();
@@ -1423,11 +1427,15 @@ bool PPCAsmParser::ParseDirectiveMachine(SMLoc L) {
// Implement ".machine any" (by doing nothing) for the benefit
// of existing assembler code. Likewise, we can then implement
// ".machine push" and ".machine pop" as no-op.
if (CPU != "any" && CPU != "push" && CPU != "pop")
return Error(L, "unrecognized machine type");
if (CPU != "any" && CPU != "push" && CPU != "pop") {
Error(L, "unrecognized machine type");
return false;
}
if (getLexer().isNot(AsmToken::EndOfStatement))
return Error(L, "unexpected token in directive");
if (getLexer().isNot(AsmToken::EndOfStatement)) {
Error(L, "unexpected token in directive");
return false;
}
return false;
}
@@ -1436,8 +1444,10 @@ bool PPCAsmParser::ParseDirectiveMachine(SMLoc L) {
/// ::= .machine cpu-identifier
bool PPCAsmParser::ParseDarwinDirectiveMachine(SMLoc L) {
if (getLexer().isNot(AsmToken::Identifier) &&
getLexer().isNot(AsmToken::String))
return Error(L, "unexpected token in directive");
getLexer().isNot(AsmToken::String)) {
Error(L, "unexpected token in directive");
return false;
}
StringRef CPU = Parser.getTok().getIdentifier();
Parser.Lex();
@@ -1445,16 +1455,24 @@ bool PPCAsmParser::ParseDarwinDirectiveMachine(SMLoc L) {
// FIXME: this is only the 'default' set of cpu variants.
// However we don't act on this information at present, this is simply
// allowing parsing to proceed with minimal sanity checking.
if (CPU != "ppc7400" && CPU != "ppc" && CPU != "ppc64")
return Error(L, "unrecognized cpu type");
if (CPU != "ppc7400" && CPU != "ppc" && CPU != "ppc64") {
Error(L, "unrecognized cpu type");
return false;
}
if (isPPC64() && (CPU == "ppc7400" || CPU == "ppc"))
return Error(L, "wrong cpu type specified for 64bit");
if (!isPPC64() && CPU == "ppc64")
return Error(L, "wrong cpu type specified for 32bit");
if (isPPC64() && (CPU == "ppc7400" || CPU == "ppc")) {
Error(L, "wrong cpu type specified for 64bit");
return false;
}
if (!isPPC64() && CPU == "ppc64") {
Error(L, "wrong cpu type specified for 32bit");
return false;
}
if (getLexer().isNot(AsmToken::EndOfStatement))
return Error(L, "unexpected token in directive");
if (getLexer().isNot(AsmToken::EndOfStatement)) {
Error(L, "unexpected token in directive");
return false;
}
return false;
}