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Introduce MCCodeGenInfo, which keeps information that can affect codegen

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(including compilation, assembly). Move relocation model Reloc::Model from
TargetMachine to MCCodeGenInfo so it's accessible even without TargetMachine.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135468 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2011-07-19 06:37:02 +00:00
parent 939ece1b5c
commit 439661395f
74 changed files with 641 additions and 314 deletions
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76
lib/Target/X86/X86TargetMachine.cpp
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@ -65,10 +65,10 @@ extern "C" void LLVMInitializeX86Target() {
}
X86_32TargetMachine::X86_32TargetMachine(const Target &T, const std::string &TT,
const std::string &CPU,
const std::string &FS)
: X86TargetMachine(T, TT, CPU, FS, false),
X86_32TargetMachine::X86_32TargetMachine(const Target &T, StringRef TT,
StringRef CPU, StringRef FS,
Reloc::Model RM)
: X86TargetMachine(T, TT, CPU, FS, RM, false),
DataLayout(getSubtargetImpl()->isTargetDarwin() ?
"e-p:32:32-f64:32:64-i64:32:64-f80:128:128-f128:128:128-n8:16:32" :
(getSubtargetImpl()->isTargetCygMing() ||
@ -82,10 +82,10 @@ X86_32TargetMachine::X86_32TargetMachine(const Target &T, const std::string &TT,
}
X86_64TargetMachine::X86_64TargetMachine(const Target &T, const std::string &TT,
const std::string &CPU,
const std::string &FS)
: X86TargetMachine(T, TT, CPU, FS, true),
X86_64TargetMachine::X86_64TargetMachine(const Target &T, StringRef TT,
StringRef CPU, StringRef FS,
Reloc::Model RM)
: X86TargetMachine(T, TT, CPU, FS, RM, true),
DataLayout("e-p:64:64-s:64-f64:64:64-i64:64:64-f80:128:128-f128:128:128-n8:16:32:64"),
InstrInfo(*this),
TSInfo(*this),
@ -95,52 +95,13 @@ X86_64TargetMachine::X86_64TargetMachine(const Target &T, const std::string &TT,
/// X86TargetMachine ctor - Create an X86 target.
///
X86TargetMachine::X86TargetMachine(const Target &T, const std::string &TT,
const std::string &CPU,
const std::string &FS, bool is64Bit)
: LLVMTargetMachine(T, TT, CPU, FS),
X86TargetMachine::X86TargetMachine(const Target &T, StringRef TT,
StringRef CPU, StringRef FS,
Reloc::Model RM, bool is64Bit)
: LLVMTargetMachine(T, TT, CPU, FS, RM),
Subtarget(TT, CPU, FS, StackAlignmentOverride, is64Bit),
FrameLowering(*this, Subtarget),
ELFWriterInfo(is64Bit, true) {
DefRelocModel = getRelocationModel();
// If no relocation model was picked, default as appropriate for the target.
if (getRelocationModel() == Reloc::Default) {
// Darwin defaults to PIC in 64 bit mode and dynamic-no-pic in 32 bit mode.
// Win64 requires rip-rel addressing, thus we force it to PIC. Otherwise we
// use static relocation model by default.
if (Subtarget.isTargetDarwin()) {
if (Subtarget.is64Bit())
setRelocationModel(Reloc::PIC_);
else
setRelocationModel(Reloc::DynamicNoPIC);
} else if (Subtarget.isTargetWin64())
setRelocationModel(Reloc::PIC_);
else
setRelocationModel(Reloc::Static);
}
assert(getRelocationModel() != Reloc::Default &&
"Relocation mode not picked");
// ELF and X86-64 don't have a distinct DynamicNoPIC model. DynamicNoPIC
// is defined as a model for code which may be used in static or dynamic
// executables but not necessarily a shared library. On X86-32 we just
// compile in -static mode, in x86-64 we use PIC.
if (getRelocationModel() == Reloc::DynamicNoPIC) {
if (is64Bit)
setRelocationModel(Reloc::PIC_);
else if (!Subtarget.isTargetDarwin())
setRelocationModel(Reloc::Static);
}
// If we are on Darwin, disallow static relocation model in X86-64 mode, since
// the Mach-O file format doesn't support it.
if (getRelocationModel() == Reloc::Static &&
Subtarget.isTargetDarwin() &&
is64Bit)
setRelocationModel(Reloc::PIC_);
// Determine the PICStyle based on the target selected.
if (getRelocationModel() == Reloc::Static) {
// Unless we're in PIC or DynamicNoPIC mode, set the PIC style to None.
@ -161,10 +122,6 @@ X86TargetMachine::X86TargetMachine(const Target &T, const std::string &TT,
Subtarget.setPICStyle(PICStyles::GOT);
}
// Finally, if we have "none" as our PIC style, force to static mode.
if (Subtarget.getPICStyle() == PICStyles::None)
setRelocationModel(Reloc::Static);
// default to hard float ABI
if (FloatABIType == FloatABI::Default)
FloatABIType = FloatABI::Hard;
@ -210,15 +167,6 @@ bool X86TargetMachine::addPreEmitPass(PassManagerBase &PM,
bool X86TargetMachine::addCodeEmitter(PassManagerBase &PM,
CodeGenOpt::Level OptLevel,
JITCodeEmitter &JCE) {
// FIXME: Move this to TargetJITInfo!
// On Darwin, do not override 64-bit setting made in X86TargetMachine().
if (DefRelocModel == Reloc::Default &&
(!Subtarget.isTargetDarwin() || !Subtarget.is64Bit())) {
setRelocationModel(Reloc::Static);
Subtarget.setPICStyle(PICStyles::None);
}
PM.add(createX86JITCodeEmitterPass(*this, JCE));
return false;