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use BSSLocal classifier to identify 'lcomm' data instead of

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duplicating the logic (differently) in lots of different targets.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93847 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2010-01-19 04:21:20 +00:00
parent ce8749e445
commit c1ef06ac52
4 changed files with 41 additions and 72 deletions
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6
include/llvm/Target/TargetLoweringObjectFile.h
View File

@ -313,12 +313,6 @@ public:
return ConstTextCoalSection;
}
/// getDataCommonSection - Return the "__DATA,__common" section we put
/// zerofill (aka bss) data into.
bool isDataCommonSection(const MCSection *Section) const {
return Section == DataCommonSection;
}
/// getLazySymbolPointerSection - Return the section corresponding to
/// the .lazy_symbol_pointer directive.
const MCSection *getLazySymbolPointerSection() const {

26
lib/Target/ARM/AsmPrinter/ARMAsmPrinter.cpp
View File

@ -1220,25 +1220,15 @@ void ARMAsmPrinter::PrintGlobalVariable(const GlobalVariable* GVar) {
// Handle the zerofill directive on darwin, which is a special form of BSS
// emission.
if (GVKind.isBSS() && MAI->hasMachoZeroFillDirective()) {
TargetLoweringObjectFileMachO &TLOFMacho =
static_cast<TargetLoweringObjectFileMachO &>(getObjFileLowering());
if (TLOFMacho.isDataCommonSection(TheSection)) {
// .globl _foo
OutStreamer.EmitSymbolAttribute(GVarSym, MCStreamer::Global);
// .zerofill __DATA, __common, _foo, 400, 5
OutStreamer.EmitZerofill(TheSection, GVarSym, Size, 1 << Align);
return;
}
if (GVKind.isBSSExtern() && MAI->hasMachoZeroFillDirective()) {
// .globl _foo
OutStreamer.EmitSymbolAttribute(GVarSym, MCStreamer::Global);
// .zerofill __DATA, __common, _foo, 400, 5
OutStreamer.EmitZerofill(TheSection, GVarSym, Size, 1 << Align);
return;
}
OutStreamer.SwitchSection(TheSection);
// FIXME: get this stuff from section kind flags.
if (C->isNullValue() && !GVar->hasSection() && !GVar->isThreadLocal() &&
// Don't put things that should go in the cstring section into "comm".
!TheSection->getKind().isMergeableCString() &&
(GVar->hasLocalLinkage() || GVar->hasLocalLinkage())) {
if (GVKind.isBSSLocal()) {
if (Size == 0) Size = 1; // .comm Foo, 0 is undefined, avoid it.
if (isDarwin) {
@ -1262,6 +1252,8 @@ void ARMAsmPrinter::PrintGlobalVariable(const GlobalVariable* GVar) {
return;
}
OutStreamer.SwitchSection(TheSection);
switch (GVar->getLinkage()) {
case GlobalValue::CommonLinkage:
case GlobalValue::LinkOnceAnyLinkage:

55
lib/Target/PowerPC/AsmPrinter/PPCAsmPrinter.cpp
View File

@ -733,10 +733,7 @@ void PPCLinuxAsmPrinter::PrintGlobalVariable(const GlobalVariable *GVar) {
return;
}
OutStreamer.SwitchSection(getObjFileLowering().
SectionForGlobal(GVar, GVKind, Mang, TM));
if (C->isNullValue() && !GVar->hasSection() && GVar->hasLocalLinkage()) {
if (GVKind.isBSSLocal()) {
if (Size == 0) Size = 1; // .comm Foo, 0 is undefined, avoid it.
O << MAI->getLCOMMDirective() << *GVarSym << ',' << Size;
@ -750,28 +747,30 @@ void PPCLinuxAsmPrinter::PrintGlobalVariable(const GlobalVariable *GVar) {
return;
}
OutStreamer.SwitchSection(getObjFileLowering().
SectionForGlobal(GVar, GVKind, Mang, TM));
switch (GVar->getLinkage()) {
case GlobalValue::LinkOnceAnyLinkage:
case GlobalValue::LinkOnceODRLinkage:
case GlobalValue::WeakAnyLinkage:
case GlobalValue::WeakODRLinkage:
case GlobalValue::CommonLinkage:
case GlobalValue::LinkerPrivateLinkage:
case GlobalValue::LinkOnceAnyLinkage:
case GlobalValue::LinkOnceODRLinkage:
case GlobalValue::WeakAnyLinkage:
case GlobalValue::WeakODRLinkage:
case GlobalValue::LinkerPrivateLinkage:
O << "\t.global " << *GVarSym;
O << "\n\t.type " << *GVarSym << ", @object\n\t.weak " << *GVarSym << '\n';
break;
case GlobalValue::AppendingLinkage:
case GlobalValue::AppendingLinkage:
// FIXME: appending linkage variables should go into a section of
// their name or something. For now, just emit them as external.
case GlobalValue::ExternalLinkage:
case GlobalValue::ExternalLinkage:
// If external or appending, declare as a global symbol
O << "\t.global " << *GVarSym;
O << "\n\t.type " << *GVarSym << ", @object\n";
// FALL THROUGH
case GlobalValue::InternalLinkage:
case GlobalValue::PrivateLinkage:
case GlobalValue::InternalLinkage:
case GlobalValue::PrivateLinkage:
break;
default:
default:
llvm_unreachable("Unknown linkage type!");
}
@ -976,25 +975,15 @@ void PPCDarwinAsmPrinter::PrintGlobalVariable(const GlobalVariable *GVar) {
// Handle the zerofill directive on darwin, which is a special form of BSS
// emission.
if (GVKind.isBSS() && MAI->hasMachoZeroFillDirective()) {
TargetLoweringObjectFileMachO &TLOFMacho =
static_cast<TargetLoweringObjectFileMachO &>(getObjFileLowering());
if (TLOFMacho.isDataCommonSection(TheSection)) {
// .globl _foo
OutStreamer.EmitSymbolAttribute(GVarSym, MCStreamer::Global);
// .zerofill __DATA, __common, _foo, 400, 5
OutStreamer.EmitZerofill(TheSection, GVarSym, Size, 1 << Align);
return;
}
if (GVKind.isBSSExtern() && MAI->hasMachoZeroFillDirective()) {
// .globl _foo
OutStreamer.EmitSymbolAttribute(GVarSym, MCStreamer::Global);
// .zerofill __DATA, __common, _foo, 400, 5
OutStreamer.EmitZerofill(TheSection, GVarSym, Size, 1 << Align);
return;
}
OutStreamer.SwitchSection(TheSection);
/// FIXME: Drive this off the section!
if (C->isNullValue() && /* FIXME: Verify correct */
!GVar->hasSection() && GVar->hasLocalLinkage() &&
// Don't put things that should go in the cstring section into "comm".
!TheSection->getKind().isMergeableCString()) {
if (GVKind.isBSSLocal()) {
if (Size == 0) Size = 1; // .comm Foo, 0 is undefined, avoid it.
O << MAI->getLCOMMDirective() << *GVarSym << ',' << Size << ',' << Align;
@ -1008,6 +997,8 @@ void PPCDarwinAsmPrinter::PrintGlobalVariable(const GlobalVariable *GVar) {
return;
}
OutStreamer.SwitchSection(TheSection);
switch (GVar->getLinkage()) {
case GlobalValue::LinkOnceAnyLinkage:
case GlobalValue::LinkOnceODRLinkage:

26
lib/Target/X86/AsmPrinter/X86AsmPrinter.cpp
View File

@ -699,25 +699,15 @@ void X86AsmPrinter::PrintGlobalVariable(const GlobalVariable* GVar) {
// Handle the zerofill directive on darwin, which is a special form of BSS
// emission.
if (GVKind.isBSS() && MAI->hasMachoZeroFillDirective()) {
TargetLoweringObjectFileMachO &TLOFMacho =
static_cast<TargetLoweringObjectFileMachO &>(getObjFileLowering());
if (TLOFMacho.isDataCommonSection(TheSection)) {
// .globl _foo
OutStreamer.EmitSymbolAttribute(GVarSym, MCStreamer::Global);
// .zerofill __DATA, __common, _foo, 400, 5
OutStreamer.EmitZerofill(TheSection, GVarSym, Size, 1 << Align);
return;
}
if (GVKind.isBSSExtern() && MAI->hasMachoZeroFillDirective()) {
// .globl _foo
OutStreamer.EmitSymbolAttribute(GVarSym, MCStreamer::Global);
// .zerofill __DATA, __common, _foo, 400, 5
OutStreamer.EmitZerofill(TheSection, GVarSym, Size, 1 << Align);
return;
}
OutStreamer.SwitchSection(TheSection);
// FIXME: get this stuff from section kind flags.
if (C->isNullValue() && !GVar->hasSection() &&
// Don't put things that should go in the cstring section into "comm".
!TheSection->getKind().isMergeableCString() &&
!GVar->isThreadLocal() && GVar->hasLocalLinkage()) {
if (GVKind.isBSSLocal()) {
if (Size == 0) Size = 1; // .comm Foo, 0 is undefined, avoid it.
if (const char *LComm = MAI->getLCOMMDirective()) {
@ -742,6 +732,8 @@ void X86AsmPrinter::PrintGlobalVariable(const GlobalVariable* GVar) {
return;
}
OutStreamer.SwitchSection(TheSection);
switch (GVar->getLinkage()) {
case GlobalValue::CommonLinkage:
case GlobalValue::LinkOnceAnyLinkage: