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Add a test for the .seh_handler directive. Fix problems with the parsing

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method exposed by the test. While we're at it, simplify the .seh_proc
parsing method.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132028 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Charles Davis 2011-05-25 01:33:42 +00:00
parent 56926a3961
commit 309213279e
2 changed files with 28 additions and 27 deletions
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45
lib/MC/MCParser/COFFAsmParser.cpp
View File

@ -184,20 +184,17 @@ bool COFFAsmParser::ParseDirectiveEndef(StringRef, SMLoc) {
}
bool COFFAsmParser::ParseSEHDirectiveStartProc(StringRef, SMLoc) {
const MCExpr *e;
const MCSymbolRefExpr *funcExpr;
SMLoc startLoc = getLexer().getLoc();
if (getParser().ParseExpression(e))
StringRef SymbolID;
if (getParser().ParseIdentifier(SymbolID))
return true;
if (!(funcExpr = dyn_cast<MCSymbolRefExpr>(e)))
return Error(startLoc, "expected symbol");
if (getLexer().isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in directive");
MCSymbol *Symbol = getContext().GetOrCreateSymbol(SymbolID);
Lex();
getStreamer().EmitWin64EHStartProc(&funcExpr->getSymbol());
getStreamer().EmitWin64EHStartProc(Symbol);
return false;
}
@ -220,29 +217,28 @@ bool COFFAsmParser::ParseSEHDirectiveEndChained(StringRef, SMLoc) {
}
bool COFFAsmParser::ParseSEHDirectiveHandler(StringRef, SMLoc) {
const MCExpr *e;
const MCSymbolRefExpr *funcExpr;
SMLoc startLoc = getLexer().getLoc();
if (getParser().ParseExpression(e))
StringRef SymbolID;
if (getParser().ParseIdentifier(SymbolID))
return true;
if (!(funcExpr = dyn_cast<MCSymbolRefExpr>(e)))
return Error(startLoc, "expected symbol");
if (getLexer().isNot(AsmToken::Comma))
return TokError("you must specify one or both of @unwind or @except");
Lex();
bool unwind = false, except = false;
startLoc = getLexer().getLoc();
if (!ParseAtUnwindOrAtExcept(unwind, except))
return Error(startLoc,"you must specify one or both of @unwind or @except");
if (ParseAtUnwindOrAtExcept(unwind, except))
return true;
if (getLexer().is(AsmToken::Comma)) {
Lex();
if (!ParseAtUnwindOrAtExcept(unwind, except))
if (ParseAtUnwindOrAtExcept(unwind, except))
return true;
}
if (getLexer().isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in directive");
MCSymbol *handler = getContext().GetOrCreateSymbol(SymbolID);
Lex();
getStreamer().EmitWin64EHHandler(&funcExpr->getSymbol(), unwind, except);
getStreamer().EmitWin64EHHandler(handler, unwind, except);
return false;
}
@ -372,12 +368,15 @@ bool COFFAsmParser::ParseSEHDirectiveEndProlog(StringRef, SMLoc) {
bool COFFAsmParser::ParseAtUnwindOrAtExcept(bool &unwind, bool &except) {
StringRef identifier;
if (getLexer().isNot(AsmToken::At))
return TokError("a handler attribute must begin with '@'");
SMLoc startLoc = getLexer().getLoc();
if (!getParser().ParseIdentifier(identifier))
Lex();
if (getParser().ParseIdentifier(identifier))
return Error(startLoc, "expected @unwind or @except");
if (identifier == "@unwind")
if (identifier == "unwind")
unwind = true;
else if (identifier == "@except")
else if (identifier == "except")
except = true;
else
return Error(startLoc, "expected @unwind or @except");

10
test/MC/AsmParser/directive_seh.s
View File

@ -1,8 +1,9 @@
# RUN: llvm-mc -triple x86_64-pc-win32 %s | FileCheck %s
# CHECK: .seh_proc func
# CHECK: .seh_stackalloc 8
# CHECK: .seh_stackalloc 24
# CHECK: .seh_endprologue
# CHECK: .seh_handler __C_specific_handler, @except
# CHECK: .seh_endproc
.text
@ -10,9 +11,10 @@
.def func; .scl 2; .type 32; .endef
.seh_proc func
func:
subq $8, %rsp
.seh_stackalloc 8
subq $24, %rsp
.seh_stackalloc 24
.seh_endprologue
addq $8, %rsp
.seh_handler __C_specific_handler, @except
addq $24, %rsp
ret
.seh_endproc