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Split PreferredEHDataFormat hook

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53300 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Anton Korobeynikov 2008-07-09 13:21:08 +00:00
parent 4468b7a988
commit b9e58efdb9
2 changed files with 86 additions and 53 deletions
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131
lib/Target/X86/X86TargetAsmInfo.cpp
View File

@ -210,6 +210,17 @@ X86DarwinTargetAsmInfo::X86DarwinTargetAsmInfo(const X86TargetMachine &TM):
DwarfExceptionSection = ".section __DATA,__gcc_except_tab";
}
unsigned
X86DarwinTargetAsmInfo::PreferredEHDataFormat(DwarfEncoding::Target Reason,
bool Global) const {
if (Reason == DwarfEncoding::Functions && Global)
return (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4);
else if (Reason == DwarfEncoding::CodeLabels || !Global)
return DW_EH_PE_pcrel;
else
return DW_EH_PE_absptr;
}
X86ELFTargetAsmInfo::X86ELFTargetAsmInfo(const X86TargetMachine &TM):
X86TargetAsmInfo(TM) {
bool is64Bit = X86TM->getSubtarget<X86Subtarget>().is64Bit();
@ -254,6 +265,45 @@ X86ELFTargetAsmInfo::X86ELFTargetAsmInfo(const X86TargetMachine &TM):
NonexecutableStackDirective = "\t.section\t.note.GNU-stack,\"\",@progbits";
}
unsigned
X86ELFTargetAsmInfo::PreferredEHDataFormat(DwarfEncoding::Target Reason,
bool Global) const {
CodeModel::Model CM = X86TM->getCodeModel();
bool is64Bit = X86TM->getSubtarget<X86Subtarget>().is64Bit();
if (X86TM->getRelocationModel() == Reloc::PIC_) {
unsigned Format = 0;
if (!is64Bit)
// 32 bit targets always encode pointers as 4 bytes
Format = DW_EH_PE_sdata4;
else {
// 64 bit targets encode pointers in 4 bytes iff:
// - code model is small OR
// - code model is medium and we're emitting externally visible symbols
// or any code symbols
if (CM == CodeModel::Small ||
(CM == CodeModel::Medium && (Global ||
Reason != DwarfEncoding::Data)))
Format = DW_EH_PE_sdata4;
else
Format = DW_EH_PE_sdata8;
}
if (Global)
Format |= DW_EH_PE_indirect;
return (Format | DW_EH_PE_pcrel);
} else {
if (is64Bit &&
(CM == CodeModel::Small ||
(CM == CodeModel::Medium && Reason != DwarfEncoding::Data)))
return DW_EH_PE_udata4;
else
return DW_EH_PE_absptr;
}
}
X86COFFTargetAsmInfo::X86COFFTargetAsmInfo(const X86TargetMachine &TM):
X86TargetAsmInfo(TM) {
GlobalPrefix = "_";
@ -312,63 +362,42 @@ X86WinTargetAsmInfo::X86WinTargetAsmInfo(const X86TargetMachine &TM):
SectionEndDirectiveSuffix = "\tends\n";
}
/// PreferredEHDataFormat - This hook allows the target to select data
/// format used for encoding pointers in exception handling data. Reason is
/// 0 for data, 1 for code labels, 2 for function pointers. Global is true
/// if the symbol can be relocated.
unsigned X86TargetAsmInfo::PreferredEHDataFormat(DwarfEncoding::Target Reason,
bool Global) const {
const X86Subtarget *Subtarget = &X86TM->getSubtarget<X86Subtarget>();
unsigned
X86COFFTargetAsmInfo::PreferredEHDataFormat(DwarfEncoding::Target Reason,
bool Global) const {
CodeModel::Model CM = X86TM->getCodeModel();
bool is64Bit = X86TM->getSubtarget<X86Subtarget>().is64Bit();
switch (Subtarget->TargetType) {
case X86Subtarget::isDarwin:
if (Reason == DwarfEncoding::Functions && Global)
return (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4);
else if (Reason == DwarfEncoding::CodeLabels || !Global)
return DW_EH_PE_pcrel;
else
return DW_EH_PE_absptr;
if (X86TM->getRelocationModel() == Reloc::PIC_) {
unsigned Format = 0;
case X86Subtarget::isELF:
case X86Subtarget::isCygwin:
case X86Subtarget::isMingw: {
CodeModel::Model CM = X86TM->getCodeModel();
if (X86TM->getRelocationModel() == Reloc::PIC_) {
unsigned Format = 0;
if (!Subtarget->is64Bit())
// 32 bit targets always encode pointers as 4 bytes
if (!is64Bit)
// 32 bit targets always encode pointers as 4 bytes
Format = DW_EH_PE_sdata4;
else {
// 64 bit targets encode pointers in 4 bytes iff:
// - code model is small OR
// - code model is medium and we're emitting externally visible symbols
// or any code symbols
if (CM == CodeModel::Small ||
(CM == CodeModel::Medium && (Global ||
Reason != DwarfEncoding::Data)))
Format = DW_EH_PE_sdata4;
else {
// 64 bit targets encode pointers in 4 bytes iff:
// - code model is small OR
// - code model is medium and we're emitting externally visible symbols
// or any code symbols
if (CM == CodeModel::Small ||
(CM == CodeModel::Medium && (Global ||
Reason != DwarfEncoding::Data)))
Format = DW_EH_PE_sdata4;
else
Format = DW_EH_PE_sdata8;
}
if (Global)
Format |= DW_EH_PE_indirect;
return (Format | DW_EH_PE_pcrel);
} else {
if (Subtarget->is64Bit() &&
(CM == CodeModel::Small ||
(CM == CodeModel::Medium && Reason != DwarfEncoding::Data)))
return DW_EH_PE_udata4;
else
return DW_EH_PE_absptr;
Format = DW_EH_PE_sdata8;
}
}
default:
return TargetAsmInfo::PreferredEHDataFormat(Reason, Global);
if (Global)
Format |= DW_EH_PE_indirect;
return (Format | DW_EH_PE_pcrel);
} else {
if (is64Bit &&
(CM == CodeModel::Small ||
(CM == CodeModel::Medium && Reason != DwarfEncoding::Data)))
return DW_EH_PE_udata4;
else
return DW_EH_PE_absptr;
}
}

8
lib/Target/X86/X86TargetAsmInfo.h
View File

@ -25,8 +25,6 @@ namespace llvm {
explicit X86TargetAsmInfo(const X86TargetMachine &TM);
virtual bool ExpandInlineAsm(CallInst *CI) const;
virtual unsigned PreferredEHDataFormat(DwarfEncoding::Target Reason,
bool Global) const;
virtual std::string SectionForGlobal(const GlobalValue *GV) const;
virtual std::string UniqueSectionForGlobal(const GlobalValue* GV,
SectionKind::Kind kind) const;
@ -40,14 +38,20 @@ namespace llvm {
struct X86DarwinTargetAsmInfo : public X86TargetAsmInfo {
explicit X86DarwinTargetAsmInfo(const X86TargetMachine &TM);
virtual unsigned PreferredEHDataFormat(DwarfEncoding::Target Reason,
bool Global) const;
};
struct X86ELFTargetAsmInfo : public X86TargetAsmInfo {
explicit X86ELFTargetAsmInfo(const X86TargetMachine &TM);
virtual unsigned PreferredEHDataFormat(DwarfEncoding::Target Reason,
bool Global) const;
};
struct X86COFFTargetAsmInfo : public X86TargetAsmInfo {
explicit X86COFFTargetAsmInfo(const X86TargetMachine &TM);
virtual unsigned PreferredEHDataFormat(DwarfEncoding::Target Reason,
bool Global) const;
};
struct X86WinTargetAsmInfo : public X86TargetAsmInfo {