[llvm-commits] [llvm] r53787 - in /llvm/trunk: include/llvm/Target/DarwinTargetAsmInfo.h lib/Target/DarwinTargetAsmInfo.cpp
Anton Korobeynikov
asl at math.spbu.ru
Sat Jul 19 06:14:46 PDT 2008
Author: asl
Date: Sat Jul 19 08:14:46 2008
New Revision: 53787
URL: http://llvm.org/viewvc/llvm-project?rev=53787&view=rev
Log:
Add TargetAsmInfo stuff for all darwin-based targets
Added:
llvm/trunk/include/llvm/Target/DarwinTargetAsmInfo.h
llvm/trunk/lib/Target/DarwinTargetAsmInfo.cpp
Added: llvm/trunk/include/llvm/Target/DarwinTargetAsmInfo.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/Target/DarwinTargetAsmInfo.h?rev=53787&view=auto
==============================================================================
--- llvm/trunk/include/llvm/Target/DarwinTargetAsmInfo.h (added)
+++ llvm/trunk/include/llvm/Target/DarwinTargetAsmInfo.h Sat Jul 19 08:14:46 2008
@@ -0,0 +1,43 @@
+//===---- DarwinTargetAsmInfo.h - Darwin asm properties ---------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines target asm properties related what form asm statements
+// should take in general on Darwin-based targets
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_ELF_TARGET_ASM_INFO_H
+#define LLVM_ELF_TARGET_ASM_INFO_H
+
+#include "llvm/Target/TargetAsmInfo.h"
+#include "llvm/Target/TargetMachine.h"
+
+namespace llvm {
+ class GlobalValue;
+ class GlobalVariable;
+
+ class DarwinTargetAsmInfo: public TargetAsmInfo {
+ const Section* TextCoalSection;
+ const Section* ConstDataCoalSection;
+ const Section* ConstDataSection;
+ const Section* DataCoalSection;
+
+ explicit DarwinTargetAsmInfo(const TargetMachine &TM);
+ virtual const Section* SelectSectionForGlobal(const GlobalValue *GV) const;
+ virtual std::string UniqueSectionForGlobal(const GlobalValue* GV,
+ SectionKind::Kind kind) const;
+ const Section* MergeableConstSection(const GlobalVariable *GV) const;
+ const Section* MergeableStringSection(const GlobalVariable *GV) const;
+ protected:
+ const TargetMachine* ETM;
+ };
+}
+
+
+#endif // LLVM_ELF_TARGET_ASM_INFO_H
Added: llvm/trunk/lib/Target/DarwinTargetAsmInfo.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/DarwinTargetAsmInfo.cpp?rev=53787&view=auto
==============================================================================
--- llvm/trunk/lib/Target/DarwinTargetAsmInfo.cpp (added)
+++ llvm/trunk/lib/Target/DarwinTargetAsmInfo.cpp Sat Jul 19 08:14:46 2008
@@ -0,0 +1,129 @@
+//===-- DarwinTargetAsmInfo.cpp - Darwin asm properties ---------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines target asm properties related what form asm statements
+// should take in general on Darwin-based targets
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Constants.h"
+#include "llvm/DerivedTypes.h"
+#include "llvm/Function.h"
+#include "llvm/GlobalVariable.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/Target/DarwinTargetAsmInfo.h"
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/Target/TargetData.h"
+
+using namespace llvm;
+
+DarwinTargetAsmInfo::DarwinTargetAsmInfo(const TargetMachine &TM) {
+ ETM = &TM;
+
+ CStringSection_ = getUnnamedSection("\t.cstring",
+ SectionFlags::Mergeable | SectionFlags::Strings);
+ FourByteConstantSection_ = getUnnamedSection("\t.literal4\n",
+ SectionFlags::Mergeable);
+ EightByteConstantSection_ = getUnnamedSection("\t.literal8\n",
+ SectionFlags::Mergeable);
+ // FIXME: Check for 64 bit
+ SixteenByteConstantSection_ = getUnnamedSection("\t.literal16\n",
+ SectionFlags::Mergeable);
+ ReadOnlySection_ = getUnnamedSection("\t.const\n", SectionFlags::None);
+
+ // FIXME: These should be named sections, really.
+ TextCoalSection =
+ getUnnamedSection(".section __TEXT,__textcoal_nt,coalesced,pure_instructions",
+ SectionFlags::Code);
+ ConstDataCoalSection =
+ getUnnamedSection(".section __DATA,__const_coal,coalesced",
+ SectionFlags::None);
+ ConstDataSection = getUnnamedSection(".const_data", SectionFlags::None);
+ DataCoalSection = getUnnamedSection(".section __DATA,__datacoal_nt,coalesced",
+ SectionFlags::Writeable);
+}
+
+const Section*
+DarwinTargetAsmInfo::SelectSectionForGlobal(const GlobalValue *GV) const {
+ SectionKind::Kind Kind = SectionKindForGlobal(GV);
+ bool isWeak = GV->isWeakForLinker();
+ bool isNonStatic = (ETM->getRelocationModel() != Reloc::Static);
+
+ switch (Kind) {
+ case SectionKind::Text:
+ if (isWeak)
+ return TextCoalSection;
+ else
+ return getTextSection_();
+ case SectionKind::Data:
+ case SectionKind::ThreadData:
+ case SectionKind::BSS:
+ case SectionKind::ThreadBSS:
+ if (cast<GlobalVariable>(GV)->isConstant())
+ return (isWeak ? ConstDataCoalSection : ConstDataSection);
+ else
+ return (isWeak ? DataCoalSection : getDataSection_());
+ case SectionKind::ROData:
+ return (isWeak ? ConstDataCoalSection :
+ (isNonStatic ? ConstDataSection : getReadOnlySection_()));
+ case SectionKind::RODataMergeStr:
+ return (isWeak ?
+ ConstDataCoalSection :
+ MergeableStringSection(cast<GlobalVariable>(GV)));
+ case SectionKind::RODataMergeConst:
+ return (isWeak ?
+ ConstDataCoalSection:
+ MergeableConstSection(cast<GlobalVariable>(GV)));
+ default:
+ assert(0 && "Unsuported section kind for global");
+ }
+
+ // FIXME: Do we have any extra special weird cases?
+}
+
+const Section*
+DarwinTargetAsmInfo::MergeableStringSection(const GlobalVariable *GV) const {
+ const TargetData *TD = ETM->getTargetData();
+ Constant *C = cast<GlobalVariable>(GV)->getInitializer();
+ const Type *Type = cast<ConstantArray>(C)->getType()->getElementType();
+
+ unsigned Size = TD->getABITypeSize(Type);
+ if (Size) {
+ const TargetData *TD = ETM->getTargetData();
+ unsigned Align = TD->getPreferredAlignment(GV);
+ if (Align <= 32)
+ return getCStringSection_();
+ }
+
+ return getReadOnlySection_();
+}
+
+const Section*
+DarwinTargetAsmInfo::MergeableConstSection(const GlobalVariable *GV) const {
+ const TargetData *TD = ETM->getTargetData();
+ Constant *C = cast<GlobalVariable>(GV)->getInitializer();
+
+ unsigned Size = TD->getABITypeSize(C->getType());
+ if (Size == 4)
+ return FourByteConstantSection_;
+ else if (Size == 8)
+ return EightByteConstantSection_;
+ // FIXME: 64 bit
+ /*else if (Size == 16 && ETM->getSubtarget<X86Subtarget>().is64Bit())
+ return SixteenByteConstantSection_;*/
+
+ return getReadOnlySection_();
+}
+
+std::string
+DarwinTargetAsmInfo::UniqueSectionForGlobal(const GlobalValue* GV,
+ SectionKind::Kind kind) const {
+ assert(0 && "Darwin does not use unique sections");
+ return "";
+}
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