#include "X86TargetMachine.h"
#include "X86.h"
-#include "llvm/PassManager.h"
-#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/Passes.h"
+#include "llvm/IR/Function.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<X86_32TargetMachine> X(TheX86_32Target);
- RegisterTargetMachine<X86_64TargetMachine> Y(TheX86_64Target);
+ RegisterTargetMachine<X86TargetMachine> X(TheX86_32Target);
+ RegisterTargetMachine<X86TargetMachine> Y(TheX86_64Target);
}
+void X86TargetMachine::anchor() { }
-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) {
-}
+/// X86TargetMachine ctor - Create an X86 target.
+///
+X86TargetMachine::X86TargetMachine(const Target &T, StringRef TT, StringRef CPU,
+ StringRef FS, const TargetOptions &Options,
+ Reloc::Model RM, CodeModel::Model CM,
+ CodeGenOpt::Level OL)
+ : LLVMTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL),
+ Subtarget(TT, CPU, FS, *this, Options.StackAlignmentOverride) {
+ // 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;
-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) {
+ initAsmInfo();
}
-/// X86TargetMachine ctor - Create an X86 target.
-///
-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 (getRelocationModel() == Reloc::PIC_)
- Subtarget.setPICStyle(PICStyles::StubPIC);
- else {
- assert(getRelocationModel() == Reloc::DynamicNoPIC);
- Subtarget.setPICStyle(PICStyles::StubDynamicNoPIC);
- }
- } else if (Subtarget.isTargetELF()) {
- Subtarget.setPICStyle(PICStyles::GOT);
+const X86Subtarget *
+X86TargetMachine::getSubtargetImpl(const Function &F) const {
+ AttributeSet FnAttrs = F.getAttributes();
+ Attribute CPUAttr =
+ FnAttrs.getAttribute(AttributeSet::FunctionIndex, "target-cpu");
+ Attribute FSAttr =
+ FnAttrs.getAttribute(AttributeSet::FunctionIndex, "target-features");
+
+ std::string CPU = !CPUAttr.hasAttribute(Attribute::None)
+ ? CPUAttr.getValueAsString().str()
+ : TargetCPU;
+ std::string FS = !FSAttr.hasAttribute(Attribute::None)
+ ? FSAttr.getValueAsString().str()
+ : TargetFS;
+
+ // FIXME: This is related to the code below to reset the target options,
+ // we need to know whether or not the soft float flag is set on the
+ // function before we can generate a subtarget. We also need to use
+ // it as a key for the subtarget since that can be the only difference
+ // between two functions.
+ Attribute SFAttr =
+ FnAttrs.getAttribute(AttributeSet::FunctionIndex, "use-soft-float");
+ bool SoftFloat = !SFAttr.hasAttribute(Attribute::None)
+ ? SFAttr.getValueAsString() == "true"
+ : Options.UseSoftFloat;
+
+ auto &I = SubtargetMap[CPU + FS + (SoftFloat ? "use-soft-float=true"
+ : "use-soft-float=false")];
+ if (!I) {
+ // This needs to be done before we create a new subtarget since any
+ // creation will depend on the TM and the code generation flags on the
+ // function that reside in TargetOptions.
+ resetTargetOptions(F);
+ I = llvm::make_unique<X86Subtarget>(TargetTriple, CPU, FS, *this,
+ Options.StackAlignmentOverride);
}
-
- // default to hard float ABI
- if (FloatABIType == FloatABI::Default)
- FloatABIType = FloatABI::Hard;
+ return I.get();
}
//===----------------------------------------------------------------------===//
// Command line options for x86
//===----------------------------------------------------------------------===//
static cl::opt<bool>
-UseVZeroUpper("x86-use-vzeroupper",
+UseVZeroUpper("x86-use-vzeroupper", cl::Hidden,
cl::desc("Minimize AVX to SSE transition penalty"),
- cl::init(false));
+ cl::init(true));
+
+//===----------------------------------------------------------------------===//
+// 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
//===----------------------------------------------------------------------===//
-bool X86TargetMachine::addInstSelector(PassManagerBase &PM,
- CodeGenOpt::Level OptLevel) {
+namespace {
+/// X86 Code Generator Pass Configuration Options.
+class X86PassConfig : public TargetPassConfig {
+public:
+ X86PassConfig(X86TargetMachine *TM, PassManagerBase &PM)
+ : TargetPassConfig(TM, PM) {}
+
+ X86TargetMachine &getX86TargetMachine() const {
+ return getTM<X86TargetMachine>();
+ }
+
+ const X86Subtarget &getX86Subtarget() const {
+ return *getX86TargetMachine().getSubtargetImpl();
+ }
+
+ void addIRPasses() override;
+ bool addInstSelector() override;
+ bool addILPOpts() override;
+ bool addPreRegAlloc() override;
+ bool addPostRegAlloc() override;
+ bool addPreEmitPass() override;
+};
+} // namespace
+
+TargetPassConfig *X86TargetMachine::createPassConfig(PassManagerBase &PM) {
+ return new X86PassConfig(this, PM);
+}
+
+void X86PassConfig::addIRPasses() {
+ addPass(createAtomicExpandPass(&getX86TargetMachine()));
+
+ TargetPassConfig::addIRPasses();
+}
+
+bool X86PassConfig::addInstSelector() {
// Install an instruction selector.
- PM.add(createX86ISelDag(*this, OptLevel));
+ addPass(createX86ISelDag(getX86TargetMachine(), getOptLevel()));
- // For 32-bit, prepend instructions to set the "global base reg" for PIC.
- if (!Subtarget.is64Bit())
- PM.add(createGlobalBaseRegPass());
+ // For ELF, cleanup any local-dynamic TLS accesses.
+ if (getX86Subtarget().isTargetELF() && getOptLevel() != CodeGenOpt::None)
+ addPass(createCleanupLocalDynamicTLSPass());
+
+ addPass(createX86GlobalBaseRegPass());
return false;
}
-bool X86TargetMachine::addPreRegAlloc(PassManagerBase &PM,
- CodeGenOpt::Level OptLevel) {
- PM.add(createX86MaxStackAlignmentHeuristicPass());
+bool X86PassConfig::addILPOpts() {
+ addPass(&EarlyIfConverterID);
+ return true;
+}
+
+bool X86PassConfig::addPreRegAlloc() {
return false; // -print-machineinstr shouldn't print after this.
}
-bool X86TargetMachine::addPostRegAlloc(PassManagerBase &PM,
- CodeGenOpt::Level OptLevel) {
- PM.add(createX86FloatingPointStackifierPass());
+bool X86PassConfig::addPostRegAlloc() {
+ addPass(createX86FloatingPointStackifierPass());
return true; // -print-machineinstr should print after this.
}
-bool X86TargetMachine::addPreEmitPass(PassManagerBase &PM,
- CodeGenOpt::Level OptLevel) {
+bool X86PassConfig::addPreEmitPass() {
bool ShouldPrint = false;
- if (OptLevel != CodeGenOpt::None && Subtarget.hasXMMInt()) {
- PM.add(createExecutionDependencyFixPass(&X86::VR128RegClass));
+ if (getOptLevel() != CodeGenOpt::None && getX86Subtarget().hasSSE2()) {
+ addPass(createExecutionDependencyFixPass(&X86::VR128RegClass));
ShouldPrint = true;
}
- if (Subtarget.hasAVX() && UseVZeroUpper) {
- PM.add(createX86IssueVZeroUpperPass());
+ if (UseVZeroUpper) {
+ addPass(createX86IssueVZeroUpperPass());
ShouldPrint = true;
}
- return ShouldPrint;
-}
-
-bool X86TargetMachine::addCodeEmitter(PassManagerBase &PM,
- CodeGenOpt::Level OptLevel,
- JITCodeEmitter &JCE) {
- PM.add(createX86JITCodeEmitterPass(*this, JCE));
+ if (getOptLevel() != CodeGenOpt::None) {
+ addPass(createX86PadShortFunctions());
+ addPass(createX86FixupLEAs());
+ ShouldPrint = true;
+ }
- return false;
+ return ShouldPrint;
}
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