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espindolapftbest
espindola
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Move some error handling down to MCStreamer.
This makes sure we get the same redefinition rules regardless of who is printing (asm parser, codegen) and to what (asm, obj). This fixes an unintentional regression in r293936. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@294752 91177308-0d34-0410-b5e6-96231b3b80d8
1 parent a5ef069 commit 7cecd9e

16 files changed

+37
-34
lines changed

‎include/llvm/MC/MCELFStreamer.h

+1-1
Original file line numberDiff line numberDiff line change
@@ -44,7 +44,7 @@ class MCELFStreamer : public MCObjectStreamer {
4444

4545
void InitSections(bool NoExecStack) override;
4646
void ChangeSection(MCSection *Section, const MCExpr *Subsection) override;
47-
void EmitLabel(MCSymbol *Symbol) override;
47+
void EmitLabel(MCSymbol *Symbol, SMLoc Loc = SMLoc()) override;
4848
void EmitAssemblerFlag(MCAssemblerFlag Flag) override;
4949
void EmitThumbFunc(MCSymbol *Func) override;
5050
void EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol) override;

‎include/llvm/MC/MCObjectStreamer.h

+1-1
Original file line numberDiff line numberDiff line change
@@ -89,7 +89,7 @@ class MCObjectStreamer : public MCStreamer {
8989
/// \name MCStreamer Interface
9090
/// @{
9191

92-
void EmitLabel(MCSymbol *Symbol) override;
92+
void EmitLabel(MCSymbol *Symbol, SMLoc Loc = SMLoc()) override;
9393
void EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) override;
9494
void EmitValueImpl(const MCExpr *Value, unsigned Size,
9595
SMLoc Loc = SMLoc()) override;

‎include/llvm/MC/MCStreamer.h

+1-1
Original file line numberDiff line numberDiff line change
@@ -393,7 +393,7 @@ class MCStreamer {
393393
/// used in an assignment.
394394
// FIXME: These emission are non-const because we mutate the symbol to
395395
// add the section we're emitting it to later.
396-
virtual void EmitLabel(MCSymbol *Symbol);
396+
virtual void EmitLabel(MCSymbol *Symbol, SMLoc Loc = SMLoc());
397397

398398
virtual void EmitEHSymAttributes(const MCSymbol *Symbol, MCSymbol *EHSymbol);
399399

‎include/llvm/MC/MCWinCOFFStreamer.h

+1-1
Original file line numberDiff line numberDiff line change
@@ -41,7 +41,7 @@ class MCWinCOFFStreamer : public MCObjectStreamer {
4141
/// \{
4242

4343
void InitSections(bool NoExecStack) override;
44-
void EmitLabel(MCSymbol *Symbol) override;
44+
void EmitLabel(MCSymbol *Symbol, SMLoc Loc = SMLoc()) override;
4545
void EmitAssemblerFlag(MCAssemblerFlag Flag) override;
4646
void EmitThumbFunc(MCSymbol *Func) override;
4747
bool EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute) override;

‎lib/MC/MCAsmStreamer.cpp

+3-4
Original file line numberDiff line numberDiff line change
@@ -130,7 +130,7 @@ class MCAsmStreamer final : public MCStreamer {
130130
void ChangeSection(MCSection *Section, const MCExpr *Subsection) override;
131131

132132
void EmitLOHDirective(MCLOHType Kind, const MCLOHArgs &Args) override;
133-
void EmitLabel(MCSymbol *Symbol) override;
133+
void EmitLabel(MCSymbol *Symbol, SMLoc Loc = SMLoc()) override;
134134

135135
void EmitAssemblerFlag(MCAssemblerFlag Flag) override;
136136
void EmitLinkerOptions(ArrayRef<std::string> Options) override;
@@ -395,9 +395,8 @@ void MCAsmStreamer::ChangeSection(MCSection *Section,
395395
Section->PrintSwitchToSection(*MAI, OS, Subsection);
396396
}
397397

398-
void MCAsmStreamer::EmitLabel(MCSymbol *Symbol) {
399-
assert(Symbol->isUndefined() && "Cannot define a symbol twice!");
400-
MCStreamer::EmitLabel(Symbol);
398+
void MCAsmStreamer::EmitLabel(MCSymbol *Symbol, SMLoc Loc) {
399+
MCStreamer::EmitLabel(Symbol, Loc);
401400

402401
Symbol->print(OS, MAI);
403402
OS << MAI->getLabelSuffix();

‎lib/MC/MCELFStreamer.cpp

+2-4
Original file line numberDiff line numberDiff line change
@@ -95,11 +95,9 @@ void MCELFStreamer::InitSections(bool NoExecStack) {
9595
SwitchSection(Ctx.getAsmInfo()->getNonexecutableStackSection(Ctx));
9696
}
9797

98-
void MCELFStreamer::EmitLabel(MCSymbol *S) {
98+
void MCELFStreamer::EmitLabel(MCSymbol *S, SMLoc Loc) {
9999
auto *Symbol = cast<MCSymbolELF>(S);
100-
assert(Symbol->isUndefined() && "Cannot define a symbol twice!");
101-
102-
MCObjectStreamer::EmitLabel(Symbol);
100+
MCObjectStreamer::EmitLabel(Symbol, Loc);
103101

104102
const MCSectionELF &Section =
105103
static_cast<const MCSectionELF &>(*getCurrentSectionOnly());

‎lib/MC/MCMachOStreamer.cpp

+3-5
Original file line numberDiff line numberDiff line change
@@ -70,7 +70,7 @@ class MCMachOStreamer : public MCObjectStreamer {
7070
/// @{
7171

7272
void ChangeSection(MCSection *Sect, const MCExpr *Subsect) override;
73-
void EmitLabel(MCSymbol *Symbol) override;
73+
void EmitLabel(MCSymbol *Symbol, SMLoc Loc = SMLoc()) override;
7474
void EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) override;
7575
void EmitEHSymAttributes(const MCSymbol *Symbol, MCSymbol *EHSymbol) override;
7676
void EmitAssemblerFlag(MCAssemblerFlag Flag) override;
@@ -181,15 +181,13 @@ void MCMachOStreamer::EmitEHSymAttributes(const MCSymbol *Symbol,
181181
EmitSymbolAttribute(EHSymbol, MCSA_PrivateExtern);
182182
}
183183

184-
void MCMachOStreamer::EmitLabel(MCSymbol *Symbol) {
185-
assert(Symbol->isUndefined() && "Cannot define a symbol twice!");
186-
184+
void MCMachOStreamer::EmitLabel(MCSymbol *Symbol, SMLoc Loc) {
187185
// We have to create a new fragment if this is an atom defining symbol,
188186
// fragments cannot span atoms.
189187
if (getAssembler().isSymbolLinkerVisible(*Symbol))
190188
insert(new MCDataFragment());
191189

192-
MCObjectStreamer::EmitLabel(Symbol);
190+
MCObjectStreamer::EmitLabel(Symbol, Loc);
193191

194192
// This causes the reference type flag to be cleared. Darwin 'as' was "trying"
195193
// to clear the weak reference and weak definition bits too, but the

‎lib/MC/MCObjectStreamer.cpp

+2-2
Original file line numberDiff line numberDiff line change
@@ -153,8 +153,8 @@ void MCObjectStreamer::EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) {
153153
EmitLabel(Frame.End);
154154
}
155155

156-
void MCObjectStreamer::EmitLabel(MCSymbol *Symbol) {
157-
MCStreamer::EmitLabel(Symbol);
156+
void MCObjectStreamer::EmitLabel(MCSymbol *Symbol, SMLoc Loc) {
157+
MCStreamer::EmitLabel(Symbol, Loc);
158158

159159
getAssembler().registerSymbol(*Symbol);
160160

‎lib/MC/MCParser/AsmParser.cpp

+1-7
Original file line numberDiff line numberDiff line change
@@ -1626,12 +1626,6 @@ bool AsmParser::parseStatement(ParseStatementInfo &Info,
16261626
Sym = getContext().getOrCreateSymbol(IDVal);
16271627
} else
16281628
Sym = Ctx.createDirectionalLocalSymbol(LocalLabelVal);
1629-
1630-
Sym->redefineIfPossible();
1631-
1632-
if (!Sym->isUndefined() || Sym->isVariable())
1633-
return Error(IDLoc, "invalid symbol redefinition");
1634-
16351629
// End of Labels should be treated as end of line for lexing
16361630
// purposes but that information is not available to the Lexer who
16371631
// does not understand Labels. This may cause us to see a Hash
@@ -1650,7 +1644,7 @@ bool AsmParser::parseStatement(ParseStatementInfo &Info,
16501644

16511645
// Emit the label.
16521646
if (!ParsingInlineAsm)
1653-
Out.EmitLabel(Sym);
1647+
Out.EmitLabel(Sym, IDLoc);
16541648

16551649
// If we are generating dwarf for assembly source files then gather the
16561650
// info to make a dwarf label entry for this label if needed.

‎lib/MC/MCStreamer.cpp

+8-1
Original file line numberDiff line numberDiff line change
@@ -290,10 +290,17 @@ void MCStreamer::AssignFragment(MCSymbol *Symbol, MCFragment *Fragment) {
290290
SymbolOrdering[Symbol] = 1 + SymbolOrdering.size();
291291
}
292292

293-
void MCStreamer::EmitLabel(MCSymbol *Symbol) {
293+
void MCStreamer::EmitLabel(MCSymbol *Symbol, SMLoc Loc) {
294+
Symbol->redefineIfPossible();
295+
296+
if (!Symbol->isUndefined() || Symbol->isVariable())
297+
return getContext().reportError(Loc, "invalid symbol redefinition");
298+
294299
assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
295300
assert(getCurrentSectionOnly() && "Cannot emit before setting section!");
296301
assert(!Symbol->getFragment() && "Unexpected fragment on symbol data!");
302+
assert(Symbol->isUndefined() && "Cannot define a symbol twice!");
303+
297304
Symbol->setFragment(&getCurrentSectionOnly()->getDummyFragment());
298305

299306
MCTargetStreamer *TS = getTargetStreamer();

‎lib/MC/WinCOFFStreamer.cpp

+2-3
Original file line numberDiff line numberDiff line change
@@ -75,10 +75,9 @@ void MCWinCOFFStreamer::InitSections(bool NoExecStack) {
7575
SwitchSection(getContext().getObjectFileInfo()->getTextSection());
7676
}
7777

78-
void MCWinCOFFStreamer::EmitLabel(MCSymbol *S) {
78+
void MCWinCOFFStreamer::EmitLabel(MCSymbol *S, SMLoc Loc) {
7979
auto *Symbol = cast<MCSymbolCOFF>(S);
80-
assert(Symbol->isUndefined() && "Cannot define a symbol twice!");
81-
MCObjectStreamer::EmitLabel(Symbol);
80+
MCObjectStreamer::EmitLabel(Symbol, Loc);
8281
}
8382

8483
void MCWinCOFFStreamer::EmitAssemblerFlag(MCAssemblerFlag Flag) {

‎lib/Object/RecordStreamer.cpp

+1-1
Original file line numberDiff line numberDiff line change
@@ -82,7 +82,7 @@ void RecordStreamer::EmitInstruction(const MCInst &Inst,
8282
MCStreamer::EmitInstruction(Inst, STI);
8383
}
8484

85-
void RecordStreamer::EmitLabel(MCSymbol *Symbol) {
85+
void RecordStreamer::EmitLabel(MCSymbol *Symbol, SMLoc Loc) {
8686
MCStreamer::EmitLabel(Symbol);
8787
markDefined(*Symbol);
8888
}

‎lib/Object/RecordStreamer.h

+1-1
Original file line numberDiff line numberDiff line change
@@ -31,7 +31,7 @@ class RecordStreamer : public MCStreamer {
3131
const_iterator end();
3232
RecordStreamer(MCContext &Context);
3333
void EmitInstruction(const MCInst &Inst, const MCSubtargetInfo &STI) override;
34-
void EmitLabel(MCSymbol *Symbol) override;
34+
void EmitLabel(MCSymbol *Symbol, SMLoc Loc = SMLoc()) override;
3535
void EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) override;
3636
bool EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute) override;
3737
void EmitZerofill(MCSection *Section, MCSymbol *Symbol, uint64_t Size,

‎lib/Target/Mips/MCTargetDesc/MipsELFStreamer.cpp

+1-1
Original file line numberDiff line numberDiff line change
@@ -51,7 +51,7 @@ void MipsELFStreamer::createPendingLabelRelocs() {
5151
Labels.clear();
5252
}
5353

54-
void MipsELFStreamer::EmitLabel(MCSymbol *Symbol) {
54+
void MipsELFStreamer::EmitLabel(MCSymbol *Symbol, SMLoc Loc) {
5555
MCELFStreamer::EmitLabel(Symbol);
5656
Labels.push_back(Symbol);
5757
}

‎lib/Target/Mips/MCTargetDesc/MipsELFStreamer.h

+1-1
Original file line numberDiff line numberDiff line change
@@ -51,7 +51,7 @@ class MipsELFStreamer : public MCELFStreamer {
5151
/// Overriding this function allows us to record all labels that should be
5252
/// marked as microMIPS. Based on this data marking is done in
5353
/// EmitInstruction.
54-
void EmitLabel(MCSymbol *Symbol) override;
54+
void EmitLabel(MCSymbol *Symbol, SMLoc Loc = SMLoc()) override;
5555

5656
/// Overriding this function allows us to dismiss all labels that are
5757
/// candidates for marking as microMIPS when .section directive is processed.

‎test/CodeGen/XCore/section-name.ll

+8
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,8 @@
1+
; RUN: llc < %s -march=xcore
2+
3+
; we used to crash in this.
4+
@bar = internal global i32 zeroinitializer
5+
6+
define void @".dp.bss"() {
7+
ret void
8+
}

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