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emit the .size directive for global variables on ELF through

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mcstreamer.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94416 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2010-01-25 07:52:13 +00:00
parent 5c78034bc8
commit 99328add83
5 changed files with 19 additions and 2 deletions
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8
include/llvm/MC/MCStreamer.h
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@ -129,6 +129,14 @@ namespace llvm {
/// @param DescValue - The value to set into the n_desc field.
virtual void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) = 0;
/// EmitELFSize - Emit an ELF .size directive.
///
/// This corresponds to an assembler statement such as:
/// .size symbol, expression
///
virtual void EmitELFSize(MCSymbol *Symbol, const MCExpr *Value) = 0;
/// EmitCommonSymbol - Emit a common symbol.
///
/// @param Symbol - The common symbol to emit.

2
lib/CodeGen/AsmPrinter/AsmPrinter.cpp
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@ -275,7 +275,7 @@ void AsmPrinter::EmitGlobalVariable(const GlobalVariable *GV) {
EmitGlobalConstant(GV->getInitializer());
if (MAI->hasDotTypeDotSizeDirective())
O << "\t.size\t" << *GVSym << ", " << Size << '\n';
OutStreamer.EmitELFSize(GVSym, MCConstantExpr::Create(Size, OutContext));
OutStreamer.AddBlankLine();
}

6
lib/MC/MCAsmStreamer.cpp
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@ -93,6 +93,7 @@ public:
virtual void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue);
virtual void EmitELFSize(MCSymbol *Symbol, const MCExpr *Value);
virtual void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
unsigned ByteAlignment);
@ -251,6 +252,11 @@ void MCAsmStreamer::EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) {
EmitEOL();
}
void MCAsmStreamer::EmitELFSize(MCSymbol *Symbol, const MCExpr *Value) {
assert(MAI.hasDotTypeDotSizeDirective());
OS << "\t.size\t" << *Symbol << ", " << *Value << '\n';
}
void MCAsmStreamer::EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
unsigned ByteAlignment) {
OS << "\t.comm\t" << *Symbol << ',' << Size;

3
lib/MC/MCMachOStreamer.cpp
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@ -124,6 +124,9 @@ public:
virtual void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue);
virtual void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
unsigned ByteAlignment);
virtual void EmitELFSize(MCSymbol *Symbol, const MCExpr *Value) {
assert(0 && "macho doesn't support this directive");
}
virtual void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size) {
assert(0 && "macho doesn't support this directive");
}

2
lib/MC/MCNullStreamer.cpp
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@ -38,7 +38,7 @@ namespace {
virtual void EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute){}
virtual void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) {}
virtual void EmitELFSize(MCSymbol *Symbol, const MCExpr *Value) {}
virtual void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
unsigned ByteAlignment) {}
virtual void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size) {}