X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTarget%2FX86%2FX86TargetMachine.cpp;h=0b1909f95c2f0fd9b6d67a27347f679469680cfb;hb=875710a2fd6b3c4f814961582594bd5c1cdb493a;hp=655ede79ba3c5fa6798ba77c618ebfd5bd45e217;hpb=e3d0e86919730784faaddcb5d9b0257c39b0804b;p=oota-llvm.git diff --git a/lib/Target/X86/X86TargetMachine.cpp b/lib/Target/X86/X86TargetMachine.cpp index 655ede79ba3..0b1909f95c2 100644 --- a/lib/Target/X86/X86TargetMachine.cpp +++ b/lib/Target/X86/X86TargetMachine.cpp @@ -13,75 +13,30 @@ #include "X86TargetMachine.h" #include "X86.h" -#include "llvm/PassManager.h" -#include "llvm/CodeGen/MachineFunction.h" #include "llvm/CodeGen/Passes.h" +#include "llvm/PassManager.h" #include "llvm/Support/CommandLine.h" #include "llvm/Support/FormattedStream.h" -#include "llvm/Target/TargetOptions.h" #include "llvm/Support/TargetRegistry.h" +#include "llvm/Target/TargetOptions.h" using namespace llvm; extern "C" void LLVMInitializeX86Target() { // Register the target. - RegisterTargetMachine X(TheX86_32Target); - RegisterTargetMachine Y(TheX86_64Target); + RegisterTargetMachine X(TheX86_32Target); + RegisterTargetMachine Y(TheX86_64Target); } -void X86_32TargetMachine::anchor() { } - -X86_32TargetMachine::X86_32TargetMachine(const Target &T, StringRef TT, - StringRef CPU, StringRef FS, - const TargetOptions &Options, - Reloc::Model RM, CodeModel::Model CM, - CodeGenOpt::Level OL) - : X86TargetMachine(T, TT, CPU, FS, Options, RM, CM, OL, false), - DL(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), - STTI(&TLInfo) { -} - -void X86_64TargetMachine::anchor() { } - -X86_64TargetMachine::X86_64TargetMachine(const Target &T, StringRef TT, - StringRef CPU, StringRef FS, - const TargetOptions &Options, - Reloc::Model RM, CodeModel::Model CM, - CodeGenOpt::Level OL) - : X86TargetMachine(T, TT, CPU, FS, Options, RM, CM, OL, true), - DL("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), - STTI(&TLInfo) { -} +void X86TargetMachine::anchor() { } /// X86TargetMachine ctor - Create an X86 target. /// -X86TargetMachine::X86TargetMachine(const Target &T, StringRef TT, - StringRef CPU, StringRef FS, - const TargetOptions &Options, +X86TargetMachine::X86TargetMachine(const Target &T, StringRef TT, StringRef CPU, + StringRef FS, const TargetOptions &Options, Reloc::Model RM, CodeModel::Model CM, - CodeGenOpt::Level OL, - bool is64Bit) - : LLVMTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL), - Subtarget(TT, CPU, FS, Options.StackAlignmentOverride, is64Bit), - FrameLowering(*this, Subtarget), - ELFWriterInfo(is64Bit, true), - InstrItins(Subtarget.getInstrItineraryData()){ + CodeGenOpt::Level OL) + : LLVMTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL), + Subtarget(TT, CPU, FS, *this, Options.StackAlignmentOverride) { // 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. @@ -89,7 +44,7 @@ X86TargetMachine::X86TargetMachine(const Target &T, StringRef TT, } else if (Subtarget.is64Bit()) { // PIC in 64 bit mode is always rip-rel. Subtarget.setPICStyle(PICStyles::RIPRel); - } else if (Subtarget.isTargetCygMing()) { + } else if (Subtarget.isTargetCOFF()) { Subtarget.setPICStyle(PICStyles::None); } else if (Subtarget.isTargetDarwin()) { if (getRelocationModel() == Reloc::PIC_) @@ -105,21 +60,37 @@ X86TargetMachine::X86TargetMachine(const Target &T, StringRef TT, // default to hard float ABI if (Options.FloatABIType == FloatABI::Default) this->Options.FloatABIType = FloatABI::Hard; + + // Windows stack unwinder gets confused when execution flow "falls through" + // after a call to 'noreturn' function. + // To prevent that, we emit a trap for 'unreachable' IR instructions. + // (which on X86, happens to be the 'ud2' instruction) + if (Subtarget.isTargetWin64()) + this->Options.TrapUnreachable = true; + + initAsmInfo(); } //===----------------------------------------------------------------------===// // Command line options for x86 //===----------------------------------------------------------------------===// static cl::opt -UseVZeroUpper("x86-use-vzeroupper", +UseVZeroUpper("x86-use-vzeroupper", cl::Hidden, cl::desc("Minimize AVX to SSE transition penalty"), cl::init(true)); -// Temporary option to control early if-conversion for x86 while adding machine -// models. -static cl::opt -X86EarlyIfConv("x86-early-ifcvt", - cl::desc("Enable early if-conversion on X86")); +//===----------------------------------------------------------------------===// +// X86 Analysis Pass Setup +//===----------------------------------------------------------------------===// + +void X86TargetMachine::addAnalysisPasses(PassManagerBase &PM) { + // Add first the target-independent BasicTTI pass, then our X86 pass. This + // allows the X86 pass to delegate to the target independent layer when + // appropriate. + PM.add(createBasicTargetTransformInfoPass(this)); + PM.add(createX86TargetTransformInfoPass(this)); +} + //===----------------------------------------------------------------------===// // Pass Pipeline Configuration @@ -140,20 +111,23 @@ public: return *getX86TargetMachine().getSubtargetImpl(); } - virtual bool addInstSelector(); - virtual bool addPreRegAlloc(); - virtual bool addPostRegAlloc(); - virtual bool addPreEmitPass(); + void addIRPasses() override; + bool addInstSelector() override; + bool addILPOpts() override; + bool addPreRegAlloc() override; + bool addPostRegAlloc() override; + bool addPreEmitPass() override; }; } // namespace TargetPassConfig *X86TargetMachine::createPassConfig(PassManagerBase &PM) { - X86PassConfig *PC = new X86PassConfig(this, PM); + return new X86PassConfig(this, PM); +} - if (X86EarlyIfConv && Subtarget.hasCMov()) - PC->enablePass(&EarlyIfConverterID); +void X86PassConfig::addIRPasses() { + addPass(createX86AtomicExpandPass(&getX86TargetMachine())); - return PC; + TargetPassConfig::addIRPasses(); } bool X86PassConfig::addInstSelector() { @@ -164,15 +138,17 @@ bool X86PassConfig::addInstSelector() { if (getX86Subtarget().isTargetELF() && getOptLevel() != CodeGenOpt::None) addPass(createCleanupLocalDynamicTLSPass()); - // For 32-bit, prepend instructions to set the "global base reg" for PIC. - if (!getX86Subtarget().is64Bit()) - addPass(createGlobalBaseRegPass()); + addPass(createX86GlobalBaseRegPass()); return false; } +bool X86PassConfig::addILPOpts() { + addPass(&EarlyIfConverterID); + return true; +} + bool X86PassConfig::addPreRegAlloc() { - addPass(createX86MaxStackAlignmentHeuristicPass()); return false; // -print-machineinstr shouldn't print after this. } @@ -188,17 +164,16 @@ bool X86PassConfig::addPreEmitPass() { ShouldPrint = true; } - if (getX86Subtarget().hasAVX() && UseVZeroUpper) { + if (UseVZeroUpper) { addPass(createX86IssueVZeroUpperPass()); ShouldPrint = true; } - return ShouldPrint; -} - -bool X86TargetMachine::addCodeEmitter(PassManagerBase &PM, - JITCodeEmitter &JCE) { - PM.add(createX86JITCodeEmitterPass(*this, JCE)); + if (getOptLevel() != CodeGenOpt::None) { + addPass(createX86PadShortFunctions()); + addPass(createX86FixupLEAs()); + ShouldPrint = true; + } - return false; + return ShouldPrint; }