//
//===----------------------------------------------------------------------===//
-#include "X86MCAsmInfo.h"
#include "X86TargetMachine.h"
#include "X86.h"
#include "llvm/PassManager.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/Passes.h"
+#include "llvm/Support/CommandLine.h"
#include "llvm/Support/FormattedStream.h"
#include "llvm/Target/TargetOptions.h"
-#include "llvm/Target/TargetRegistry.h"
+#include "llvm/Support/TargetRegistry.h"
using namespace llvm;
-static const MCAsmInfo *createMCAsmInfo(const Target &T, StringRef TT) {
- Triple TheTriple(TT);
- switch (TheTriple.getOS()) {
- case Triple::Darwin:
- return new X86MCAsmInfoDarwin(TheTriple);
- case Triple::MinGW32:
- case Triple::MinGW64:
- case Triple::Cygwin:
- return new X86MCAsmInfoCOFF(TheTriple);
- case Triple::Win32:
- return new X86WinMCAsmInfo(TheTriple);
- default:
- return new X86ELFMCAsmInfo(TheTriple);
- }
-}
-
-extern "C" void LLVMInitializeX86Target() {
+extern "C" void LLVMInitializeX86Target() {
// Register the target.
RegisterTargetMachine<X86_32TargetMachine> X(TheX86_32Target);
RegisterTargetMachine<X86_64TargetMachine> Y(TheX86_64Target);
-
- // Register the target asm info.
- RegisterAsmInfoFn A(TheX86_32Target, createMCAsmInfo);
- RegisterAsmInfoFn B(TheX86_64Target, createMCAsmInfo);
-
- // Register the code emitter.
- TargetRegistry::RegisterCodeEmitter(TheX86_32Target, createX86MCCodeEmitter);
- TargetRegistry::RegisterCodeEmitter(TheX86_64Target, createX86MCCodeEmitter);
}
-X86_32TargetMachine::X86_32TargetMachine(const Target &T, const std::string &TT,
- const std::string &FS)
- : X86TargetMachine(T, TT, FS, false) {
+X86_32TargetMachine::X86_32TargetMachine(const Target &T, StringRef TT,
+ StringRef CPU, StringRef FS,
+ Reloc::Model RM, CodeModel::Model CM)
+ : X86TargetMachine(T, TT, CPU, FS, RM, CM, false),
+ DataLayout(getSubtargetImpl()->isTargetDarwin() ?
+ "e-p:32:32-f64:32:64-i64:32:64-f80:128:128-f128:128:128-"
+ "n8:16:32-S128" :
+ (getSubtargetImpl()->isTargetCygMing() ||
+ getSubtargetImpl()->isTargetWindows()) ?
+ "e-p:32:32-f64:64:64-i64:64:64-f80:32:32-f128:128:128-"
+ "n8:16:32-S32" :
+ "e-p:32:32-f64:32:64-i64:32:64-f80:32:32-f128:128:128-"
+ "n8:16:32-S128"),
+ InstrInfo(*this),
+ TSInfo(*this),
+ TLInfo(*this),
+ JITInfo(*this) {
}
-X86_64TargetMachine::X86_64TargetMachine(const Target &T, const std::string &TT,
- const std::string &FS)
- : X86TargetMachine(T, TT, FS, true) {
+X86_64TargetMachine::X86_64TargetMachine(const Target &T, StringRef TT,
+ StringRef CPU, StringRef FS,
+ Reloc::Model RM, CodeModel::Model CM)
+ : X86TargetMachine(T, TT, CPU, FS, RM, CM, true),
+ DataLayout("e-p:64:64-s:64-f64:64:64-i64:64:64-f80:128:128-f128:128:128-"
+ "n8:16:32:64-S128"),
+ InstrInfo(*this),
+ TSInfo(*this),
+ TLInfo(*this),
+ JITInfo(*this) {
}
/// X86TargetMachine ctor - Create an X86 target.
///
-X86TargetMachine::X86TargetMachine(const Target &T, const std::string &TT,
- const std::string &FS, bool is64Bit)
- : LLVMTargetMachine(T, TT),
- Subtarget(TT, FS, is64Bit),
- DataLayout(Subtarget.getDataLayout()),
- FrameInfo(TargetFrameInfo::StackGrowsDown,
- Subtarget.getStackAlignment(),
- (Subtarget.isTargetWin64() ? -40 :
- (Subtarget.is64Bit() ? -8 : -4))),
- InstrInfo(*this), JITInfo(*this), TLInfo(*this), ELFWriterInfo(*this) {
- DefRelocModel = getRelocationModel();
-
- // If no relocation model was picked, default as appropriate for the target.
- if (getRelocationModel() == Reloc::Default) {
- if (!Subtarget.isTargetDarwin())
- setRelocationModel(Reloc::Static);
- else if (Subtarget.is64Bit())
- setRelocationModel(Reloc::PIC_);
- else
- setRelocationModel(Reloc::DynamicNoPIC);
- }
-
- 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_);
-
+X86TargetMachine::X86TargetMachine(const Target &T, StringRef TT,
+ StringRef CPU, StringRef FS,
+ Reloc::Model RM, CodeModel::Model CM,
+ bool is64Bit)
+ : LLVMTargetMachine(T, TT, CPU, FS, RM, CM),
+ Subtarget(TT, CPU, FS, StackAlignmentOverride, is64Bit),
+ FrameLowering(*this, Subtarget),
+ ELFWriterInfo(is64Bit, true) {
// 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.
Subtarget.setPICStyle(PICStyles::None);
+ } else if (Subtarget.is64Bit()) {
+ // PIC in 64 bit mode is always rip-rel.
+ Subtarget.setPICStyle(PICStyles::RIPRel);
} else if (Subtarget.isTargetCygMing()) {
Subtarget.setPICStyle(PICStyles::None);
} else if (Subtarget.isTargetDarwin()) {
- if (Subtarget.is64Bit())
- Subtarget.setPICStyle(PICStyles::RIPRel);
- else if (getRelocationModel() == Reloc::PIC_)
+ if (getRelocationModel() == Reloc::PIC_)
Subtarget.setPICStyle(PICStyles::StubPIC);
else {
assert(getRelocationModel() == Reloc::DynamicNoPIC);
Subtarget.setPICStyle(PICStyles::StubDynamicNoPIC);
}
} else if (Subtarget.isTargetELF()) {
- if (Subtarget.is64Bit())
- Subtarget.setPICStyle(PICStyles::RIPRel);
- else
- Subtarget.setPICStyle(PICStyles::GOT);
+ 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;
}
+//===----------------------------------------------------------------------===//
+// Command line options for x86
+//===----------------------------------------------------------------------===//
+static cl::opt<bool>
+UseVZeroUpper("x86-use-vzeroupper",
+ cl::desc("Minimize AVX to SSE transition penalty"),
+ cl::init(false));
+
//===----------------------------------------------------------------------===//
// Pass Pipeline Configuration
//===----------------------------------------------------------------------===//
// Install an instruction selector.
PM.add(createX86ISelDag(*this, OptLevel));
- // If we're using Fast-ISel, clean up the mess.
- if (EnableFastISel)
- PM.add(createDeadMachineInstructionElimPass());
-
- // Install a pass to insert x87 FP_REG_KILL instructions, as needed.
- PM.add(createX87FPRegKillInserterPass());
+ // For 32-bit, prepend instructions to set the "global base reg" for PIC.
+ if (!Subtarget.is64Bit())
+ PM.add(createGlobalBaseRegPass());
return false;
}
bool X86TargetMachine::addPreRegAlloc(PassManagerBase &PM,
CodeGenOpt::Level OptLevel) {
- // Calculate and set max stack object alignment early, so we can decide
- // whether we will need stack realignment (and thus FP).
- PM.add(createMaxStackAlignmentCalculatorPass());
+ PM.add(createX86MaxStackAlignmentHeuristicPass());
return false; // -print-machineinstr shouldn't print after this.
}
return true; // -print-machineinstr should print after this.
}
-bool X86TargetMachine::addCodeEmitter(PassManagerBase &PM,
- CodeGenOpt::Level OptLevel,
- MachineCodeEmitter &MCE) {
- // 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);
+bool X86TargetMachine::addPreEmitPass(PassManagerBase &PM,
+ CodeGenOpt::Level OptLevel) {
+ bool ShouldPrint = false;
+ if (OptLevel != CodeGenOpt::None &&
+ (Subtarget.hasSSE2() || Subtarget.hasAVX())) {
+ PM.add(createExecutionDependencyFixPass(&X86::VR128RegClass));
+ ShouldPrint = true;
}
-
- PM.add(createX86CodeEmitterPass(*this, MCE));
- return false;
-}
-
-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);
+ if (Subtarget.hasAVX() && UseVZeroUpper) {
+ PM.add(createX86IssueVZeroUpperPass());
+ ShouldPrint = true;
}
-
-
- PM.add(createX86JITCodeEmitterPass(*this, JCE));
- return false;
+ return ShouldPrint;
}
bool X86TargetMachine::addCodeEmitter(PassManagerBase &PM,
CodeGenOpt::Level OptLevel,
- ObjectCodeEmitter &OCE) {
- PM.add(createX86ObjectCodeEmitterPass(*this, OCE));
- return false;
-}
-
-bool X86TargetMachine::addSimpleCodeEmitter(PassManagerBase &PM,
- CodeGenOpt::Level OptLevel,
- MachineCodeEmitter &MCE) {
- PM.add(createX86CodeEmitterPass(*this, MCE));
- return false;
-}
-
-bool X86TargetMachine::addSimpleCodeEmitter(PassManagerBase &PM,
- CodeGenOpt::Level OptLevel,
- JITCodeEmitter &JCE) {
+ JITCodeEmitter &JCE) {
PM.add(createX86JITCodeEmitterPass(*this, JCE));
- return false;
-}
-bool X86TargetMachine::addSimpleCodeEmitter(PassManagerBase &PM,
- CodeGenOpt::Level OptLevel,
- ObjectCodeEmitter &OCE) {
- PM.add(createX86ObjectCodeEmitterPass(*this, OCE));
return false;
}
-
-void X86TargetMachine::setCodeModelForStatic() {
-
- if (getCodeModel() != CodeModel::Default) return;
-
- // For static codegen, if we're not already set, use Small codegen.
- setCodeModel(CodeModel::Small);
-}
-
-
-void X86TargetMachine::setCodeModelForJIT() {
-
- if (getCodeModel() != CodeModel::Default) return;
-
- // 64-bit JIT places everything in the same buffer except external functions.
- if (Subtarget.is64Bit())
- setCodeModel(CodeModel::Large);
- else
- setCodeModel(CodeModel::Small);
-}
-
-DwarfLSDAEncoding::Encoding X86TargetMachine::getLSDAEncoding() const {
- if (Subtarget.isTargetDarwin() && Subtarget.getDarwinVers() != 10)
- return DwarfLSDAEncoding::FourByte;
-
- return DwarfLSDAEncoding::EightByte;
-}
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