#include "X86TargetMachine.h"
#include "X86.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"
void X86TargetMachine::anchor() { }
-static std::string computeDataLayout(const X86Subtarget &ST) {
- // X86 is little endian
- std::string Ret = "e";
-
- Ret += DataLayout::getManglingComponent(ST.getTargetTriple());
- // X86 and x32 have 32 bit pointers.
- if (ST.isTarget64BitILP32() || !ST.is64Bit())
- Ret += "-p:32:32";
-
- // Some ABIs align 64 bit integers and doubles to 64 bits, others to 32.
- if (ST.is64Bit() || ST.isTargetCygMing() || ST.isTargetKnownWindowsMSVC() ||
- ST.isTargetNaCl())
- Ret += "-i64:64";
- else
- Ret += "-f64:32:64";
-
- // Some ABIs align long double to 128 bits, others to 32.
- if (ST.isTargetNaCl())
- ; // No f80
- else if (ST.is64Bit() || ST.isTargetDarwin())
- Ret += "-f80:128";
- else
- Ret += "-f80:32";
-
- // The registers can hold 8, 16, 32 or, in x86-64, 64 bits.
- if (ST.is64Bit())
- Ret += "-n8:16:32:64";
- else
- Ret += "-n8:16:32";
-
- // The stack is aligned to 32 bits on some ABIs and 128 bits on others.
- if (!ST.is64Bit() && (ST.isTargetCygMing() || ST.isTargetKnownWindowsMSVC()))
- Ret += "-S32";
- else
- Ret += "-S128";
-
- return Ret;
-}
-
/// 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)
- : LLVMTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL),
- Subtarget(TT, CPU, FS, Options.StackAlignmentOverride),
- FrameLowering(*this, Subtarget),
- InstrItins(Subtarget.getInstrItineraryData()),
- DL(computeDataLayout(*getSubtargetImpl())),
- InstrInfo(*this),
- TLInfo(*this),
- TSInfo(*this),
- JITInfo(*this) {
- // 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.isTargetCOFF()) {
- 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);
- }
-
+ : 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;
initAsmInfo();
}
+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);
+ }
+ return I.get();
+}
+
//===----------------------------------------------------------------------===//
// Command line options for x86
//===----------------------------------------------------------------------===//
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<bool>
-X86EarlyIfConv("x86-early-ifcvt", cl::Hidden,
- cl::desc("Enable early if-conversion on X86"));
-
//===----------------------------------------------------------------------===//
// X86 Analysis Pass Setup
//===----------------------------------------------------------------------===//
return *getX86TargetMachine().getSubtargetImpl();
}
+ void addIRPasses() override;
bool addInstSelector() override;
bool addILPOpts() override;
bool addPreRegAlloc() override;
return new X86PassConfig(this, PM);
}
+void X86PassConfig::addIRPasses() {
+ addPass(createAtomicExpandPass(&getX86TargetMachine()));
+
+ TargetPassConfig::addIRPasses();
+}
+
bool X86PassConfig::addInstSelector() {
// Install an instruction selector.
addPass(createX86ISelDag(getX86TargetMachine(), getOptLevel()));
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() {
- if (X86EarlyIfConv && getX86Subtarget().hasCMov()) {
- addPass(&EarlyIfConverterID);
- return true;
- }
- return false;
+ addPass(&EarlyIfConverterID);
+ return true;
}
bool X86PassConfig::addPreRegAlloc() {
ShouldPrint = true;
}
- if (getX86Subtarget().hasAVX() && UseVZeroUpper) {
+ if (UseVZeroUpper) {
addPass(createX86IssueVZeroUpperPass());
ShouldPrint = true;
}
- if (getOptLevel() != CodeGenOpt::None &&
- getX86Subtarget().padShortFunctions()) {
+ if (getOptLevel() != CodeGenOpt::None) {
addPass(createX86PadShortFunctions());
- ShouldPrint = true;
- }
- if (getOptLevel() != CodeGenOpt::None &&
- (getX86Subtarget().LEAusesAG() ||
- getX86Subtarget().slowLEA())){
addPass(createX86FixupLEAs());
ShouldPrint = true;
}
return ShouldPrint;
}
-
-bool X86TargetMachine::addCodeEmitter(PassManagerBase &PM,
- JITCodeEmitter &JCE) {
- PM.add(createX86JITCodeEmitterPass(*this, JCE));
-
- return false;
-}
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