//
//===----------------------------------------------------------------------===//
-#include "ARMTargetMachine.h"
-#include "ARMTargetAsmInfo.h"
-#include "ARMFrameInfo.h"
#include "ARM.h"
-#include "llvm/PassManager.h"
+#include "ARMTargetMachine.h"
+#include "ARMFrameLowering.h"
#include "llvm/CodeGen/Passes.h"
+#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/PassManager.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/FormattedStream.h"
+#include "llvm/Support/TargetRegistry.h"
#include "llvm/Target/TargetOptions.h"
-#include "llvm/Target/TargetRegistry.h"
+#include "llvm/Transforms/Scalar.h"
using namespace llvm;
-static cl::opt<bool> DisableLdStOpti("disable-arm-loadstore-opti", cl::Hidden,
- cl::desc("Disable load store optimization pass"));
-static cl::opt<bool> DisableIfConversion("disable-arm-if-conversion",cl::Hidden,
- cl::desc("Disable if-conversion pass"));
-extern "C" void LLVMInitializeARMTarget() {
+static cl::opt<bool>
+DisableA15SDOptimization("disable-a15-sd-optimization", cl::Hidden,
+ cl::desc("Inhibit optimization of S->D register accesses on A15"),
+ cl::init(false));
+
+static cl::opt<bool>
+EnableAtomicTidy("arm-atomic-cfg-tidy", cl::Hidden,
+ cl::desc("Run SimplifyCFG after expanding atomic operations"
+ " to make use of cmpxchg flow-based information"),
+ cl::init(true));
+
+extern "C" void LLVMInitializeARMTarget() {
// Register the target.
- RegisterTargetMachine<ARMTargetMachine> X(TheARMTarget);
- RegisterTargetMachine<ThumbTargetMachine> Y(TheThumbTarget);
+ RegisterTargetMachine<ARMLETargetMachine> X(TheARMLETarget);
+ RegisterTargetMachine<ARMBETargetMachine> Y(TheARMBETarget);
+ RegisterTargetMachine<ThumbLETargetMachine> A(TheThumbLETarget);
+ RegisterTargetMachine<ThumbBETargetMachine> B(TheThumbBETarget);
}
+
/// TargetMachine ctor - Create an ARM architecture model.
///
-ARMBaseTargetMachine::ARMBaseTargetMachine(const Target &T,
- const std::string &TT,
- const std::string &FS,
- bool isThumb)
- : LLVMTargetMachine(T),
- Subtarget(TT, FS, isThumb),
- FrameInfo(Subtarget),
- JITInfo(),
- InstrItins(Subtarget.getInstrItineraryData()) {
- DefRelocModel = getRelocationModel();
+ARMBaseTargetMachine::ARMBaseTargetMachine(const Target &T, StringRef TT,
+ StringRef CPU, StringRef FS,
+ const TargetOptions &Options,
+ Reloc::Model RM, CodeModel::Model CM,
+ CodeGenOpt::Level OL, bool isLittle)
+ : LLVMTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL),
+ Subtarget(TT, CPU, FS, *this, isLittle, Options) {
+
+ // Default to triple-appropriate float ABI
+ if (Options.FloatABIType == FloatABI::Default)
+ this->Options.FloatABIType =
+ Subtarget.isTargetHardFloat() ? FloatABI::Hard : FloatABI::Soft;
+}
+
+void ARMBaseTargetMachine::addAnalysisPasses(PassManagerBase &PM) {
+ // Add first the target-independent BasicTTI pass, then our ARM pass. This
+ // allows the ARM pass to delegate to the target independent layer when
+ // appropriate.
+ PM.add(createBasicTargetTransformInfoPass(this));
+ PM.add(createARMTargetTransformInfoPass(this));
}
-ARMTargetMachine::ARMTargetMachine(const Target &T, const std::string &TT,
- const std::string &FS)
- : ARMBaseTargetMachine(T, TT, FS, false), InstrInfo(Subtarget),
- DataLayout(Subtarget.isAPCS_ABI() ?
- std::string("e-p:32:32-f64:32:32-i64:32:32") :
- std::string("e-p:32:32-f64:64:64-i64:64:64")),
- TLInfo(*this) {
+
+void ARMTargetMachine::anchor() { }
+
+ARMTargetMachine::ARMTargetMachine(const Target &T, StringRef TT, StringRef CPU,
+ StringRef FS, const TargetOptions &Options,
+ Reloc::Model RM, CodeModel::Model CM,
+ CodeGenOpt::Level OL, bool isLittle)
+ : ARMBaseTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL, isLittle) {
+ initAsmInfo();
+ if (!Subtarget.hasARMOps())
+ report_fatal_error("CPU: '" + Subtarget.getCPUString() + "' does not "
+ "support ARM mode execution!");
}
-ThumbTargetMachine::ThumbTargetMachine(const Target &T, const std::string &TT,
- const std::string &FS)
- : ARMBaseTargetMachine(T, TT, FS, true),
- DataLayout(Subtarget.isAPCS_ABI() ?
- std::string("e-p:32:32-f64:32:32-i64:32:32-"
- "i16:16:32-i8:8:32-i1:8:32-a:0:32") :
- std::string("e-p:32:32-f64:64:64-i64:64:64-"
- "i16:16:32-i8:8:32-i1:8:32-a:0:32")),
- TLInfo(*this) {
- // Create the approriate type of Thumb InstrInfo
- if (Subtarget.hasThumb2())
- InstrInfo = new Thumb2InstrInfo(Subtarget);
- else
- InstrInfo = new Thumb1InstrInfo(Subtarget);
+void ARMLETargetMachine::anchor() { }
+
+ARMLETargetMachine::ARMLETargetMachine(const Target &T, StringRef TT,
+ StringRef CPU, StringRef FS,
+ const TargetOptions &Options,
+ Reloc::Model RM, CodeModel::Model CM,
+ CodeGenOpt::Level OL)
+ : ARMTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL, true) {}
+
+void ARMBETargetMachine::anchor() { }
+
+ARMBETargetMachine::ARMBETargetMachine(const Target &T, StringRef TT,
+ StringRef CPU, StringRef FS,
+ const TargetOptions &Options,
+ Reloc::Model RM, CodeModel::Model CM,
+ CodeGenOpt::Level OL)
+ : ARMTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL, false) {}
+
+void ThumbTargetMachine::anchor() { }
+
+ThumbTargetMachine::ThumbTargetMachine(const Target &T, StringRef TT,
+ StringRef CPU, StringRef FS,
+ const TargetOptions &Options,
+ Reloc::Model RM, CodeModel::Model CM,
+ CodeGenOpt::Level OL, bool isLittle)
+ : ARMBaseTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL,
+ isLittle) {
+ initAsmInfo();
}
+void ThumbLETargetMachine::anchor() { }
+
+ThumbLETargetMachine::ThumbLETargetMachine(const Target &T, StringRef TT,
+ StringRef CPU, StringRef FS,
+ const TargetOptions &Options,
+ Reloc::Model RM, CodeModel::Model CM,
+ CodeGenOpt::Level OL)
+ : ThumbTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL, true) {}
+
+void ThumbBETargetMachine::anchor() { }
+
+ThumbBETargetMachine::ThumbBETargetMachine(const Target &T, StringRef TT,
+ StringRef CPU, StringRef FS,
+ const TargetOptions &Options,
+ Reloc::Model RM, CodeModel::Model CM,
+ CodeGenOpt::Level OL)
+ : ThumbTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL, false) {}
+
+namespace {
+/// ARM Code Generator Pass Configuration Options.
+class ARMPassConfig : public TargetPassConfig {
+public:
+ ARMPassConfig(ARMBaseTargetMachine *TM, PassManagerBase &PM)
+ : TargetPassConfig(TM, PM) {}
+
+ ARMBaseTargetMachine &getARMTargetMachine() const {
+ return getTM<ARMBaseTargetMachine>();
+ }
-const TargetAsmInfo *ARMBaseTargetMachine::createTargetAsmInfo() const {
- switch (Subtarget.TargetType) {
- default: llvm_unreachable("Unknown ARM subtarget kind");
- case ARMSubtarget::isDarwin:
- return new ARMDarwinTargetAsmInfo();
- case ARMSubtarget::isELF:
- return new ARMELFTargetAsmInfo();
+ const ARMSubtarget &getARMSubtarget() const {
+ return *getARMTargetMachine().getSubtargetImpl();
}
+
+ void addIRPasses() override;
+ bool addPreISel() override;
+ bool addInstSelector() override;
+ bool addPreRegAlloc() override;
+ bool addPreSched2() override;
+ bool addPreEmitPass() override;
+};
+} // namespace
+
+TargetPassConfig *ARMBaseTargetMachine::createPassConfig(PassManagerBase &PM) {
+ return new ARMPassConfig(this, PM);
}
+void ARMPassConfig::addIRPasses() {
+ addPass(createAtomicExpandLoadLinkedPass(TM));
-// Pass Pipeline Configuration
-bool ARMBaseTargetMachine::addInstSelector(PassManagerBase &PM,
- CodeGenOpt::Level OptLevel) {
- PM.add(createARMISelDag(*this));
- return false;
+ // Cmpxchg instructions are often used with a subsequent comparison to
+ // determine whether it succeeded. We can exploit existing control-flow in
+ // ldrex/strex loops to simplify this, but it needs tidying up.
+ const ARMSubtarget *Subtarget = &getARMSubtarget();
+ if (Subtarget->hasAnyDataBarrier() && !Subtarget->isThumb1Only())
+ if (TM->getOptLevel() != CodeGenOpt::None && EnableAtomicTidy)
+ addPass(createCFGSimplificationPass());
+
+ TargetPassConfig::addIRPasses();
}
-bool ARMBaseTargetMachine::addPreRegAlloc(PassManagerBase &PM,
- CodeGenOpt::Level OptLevel) {
- if (Subtarget.hasNEON())
- PM.add(createNEONPreAllocPass());
+bool ARMPassConfig::addPreISel() {
+ if (TM->getOptLevel() != CodeGenOpt::None)
+ addPass(createGlobalMergePass(TM));
- // FIXME: temporarily disabling load / store optimization pass for Thumb mode.
- if (OptLevel != CodeGenOpt::None && !DisableLdStOpti && !Subtarget.isThumb())
- PM.add(createARMLoadStoreOptimizationPass(true));
- return true;
+ return false;
}
-bool ARMBaseTargetMachine::addPreEmitPass(PassManagerBase &PM,
- CodeGenOpt::Level OptLevel) {
- // FIXME: temporarily disabling load / store optimization pass for Thumb1 mode.
- if (OptLevel != CodeGenOpt::None && !DisableLdStOpti &&
- !Subtarget.isThumb1Only())
- PM.add(createARMLoadStoreOptimizationPass());
+bool ARMPassConfig::addInstSelector() {
+ addPass(createARMISelDag(getARMTargetMachine(), getOptLevel()));
- if (OptLevel != CodeGenOpt::None &&
- !DisableIfConversion && !Subtarget.isThumb())
- PM.add(createIfConverterPass());
+ const ARMSubtarget *Subtarget = &getARMSubtarget();
+ if (Subtarget->isTargetELF() && !Subtarget->isThumb1Only() &&
+ TM->Options.EnableFastISel)
+ addPass(createARMGlobalBaseRegPass());
+ return false;
+}
- if (Subtarget.isThumb2()) {
- PM.add(createThumb2ITBlockPass());
- PM.add(createThumb2SizeReductionPass());
+bool ARMPassConfig::addPreRegAlloc() {
+ if (getOptLevel() != CodeGenOpt::None)
+ addPass(createARMLoadStoreOptimizationPass(true));
+ if (getOptLevel() != CodeGenOpt::None && getARMSubtarget().isCortexA9())
+ addPass(createMLxExpansionPass());
+ // Since the A15SDOptimizer pass can insert VDUP instructions, it can only be
+ // enabled when NEON is available.
+ if (getOptLevel() != CodeGenOpt::None && getARMSubtarget().isCortexA15() &&
+ getARMSubtarget().hasNEON() && !DisableA15SDOptimization) {
+ addPass(createA15SDOptimizerPass());
}
-
- PM.add(createARMConstantIslandPass());
return true;
}
-bool ARMBaseTargetMachine::addCodeEmitter(PassManagerBase &PM,
- CodeGenOpt::Level OptLevel,
- MachineCodeEmitter &MCE) {
- // FIXME: Move this to TargetJITInfo!
- if (DefRelocModel == Reloc::Default)
- setRelocationModel(Reloc::Static);
+bool ARMPassConfig::addPreSched2() {
+ if (getOptLevel() != CodeGenOpt::None) {
+ addPass(createARMLoadStoreOptimizationPass());
+ printAndVerify("After ARM load / store optimizer");
- // Machine code emitter pass for ARM.
- PM.add(createARMCodeEmitterPass(*this, MCE));
- return false;
-}
+ if (getARMSubtarget().hasNEON())
+ addPass(createExecutionDependencyFixPass(&ARM::DPRRegClass));
+ }
-bool ARMBaseTargetMachine::addCodeEmitter(PassManagerBase &PM,
- CodeGenOpt::Level OptLevel,
- JITCodeEmitter &JCE) {
- // FIXME: Move this to TargetJITInfo!
- if (DefRelocModel == Reloc::Default)
- setRelocationModel(Reloc::Static);
+ // Expand some pseudo instructions into multiple instructions to allow
+ // proper scheduling.
+ addPass(createARMExpandPseudoPass());
+
+ if (getOptLevel() != CodeGenOpt::None) {
+ if (!getARMSubtarget().isThumb1Only()) {
+ // in v8, IfConversion depends on Thumb instruction widths
+ if (getARMSubtarget().restrictIT() &&
+ !getARMSubtarget().prefers32BitThumb())
+ addPass(createThumb2SizeReductionPass());
+ addPass(&IfConverterID);
+ }
+ }
+ if (getARMSubtarget().isThumb2())
+ addPass(createThumb2ITBlockPass());
- // Machine code emitter pass for ARM.
- PM.add(createARMJITCodeEmitterPass(*this, JCE));
- return false;
+ return true;
}
-bool ARMBaseTargetMachine::addCodeEmitter(PassManagerBase &PM,
- CodeGenOpt::Level OptLevel,
- ObjectCodeEmitter &OCE) {
- // FIXME: Move this to TargetJITInfo!
- if (DefRelocModel == Reloc::Default)
- setRelocationModel(Reloc::Static);
+bool ARMPassConfig::addPreEmitPass() {
+ if (getARMSubtarget().isThumb2()) {
+ if (!getARMSubtarget().prefers32BitThumb())
+ addPass(createThumb2SizeReductionPass());
- // Machine code emitter pass for ARM.
- PM.add(createARMObjectCodeEmitterPass(*this, OCE));
- return false;
-}
+ // Constant island pass work on unbundled instructions.
+ addPass(&UnpackMachineBundlesID);
+ }
-bool ARMBaseTargetMachine::addSimpleCodeEmitter(PassManagerBase &PM,
- CodeGenOpt::Level OptLevel,
- MachineCodeEmitter &MCE) {
- // Machine code emitter pass for ARM.
- PM.add(createARMCodeEmitterPass(*this, MCE));
- return false;
-}
+ addPass(createARMOptimizeBarriersPass());
+ addPass(createARMConstantIslandPass());
-bool ARMBaseTargetMachine::addSimpleCodeEmitter(PassManagerBase &PM,
- CodeGenOpt::Level OptLevel,
- JITCodeEmitter &JCE) {
- // Machine code emitter pass for ARM.
- PM.add(createARMJITCodeEmitterPass(*this, JCE));
- return false;
+ return true;
}
-bool ARMBaseTargetMachine::addSimpleCodeEmitter(PassManagerBase &PM,
- CodeGenOpt::Level OptLevel,
- ObjectCodeEmitter &OCE) {
+bool ARMBaseTargetMachine::addCodeEmitter(PassManagerBase &PM,
+ JITCodeEmitter &JCE) {
// Machine code emitter pass for ARM.
- PM.add(createARMObjectCodeEmitterPass(*this, OCE));
+ PM.add(createARMJITCodeEmitterPass(*this, JCE));
return false;
}
-
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