X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTarget%2FMips%2FMipsTargetMachine.cpp;h=984c58eb6c1e3a138818bac9ed964ef32af43625;hb=61e341e0bfcc83ec865fe763759e66ab3c2feba5;hp=7d73866562b455f43b9e25bfca7f0075d9d6cf99;hpb=270483466124fe1e19d5439e958fef63cebd43cd;p=oota-llvm.git diff --git a/lib/Target/Mips/MipsTargetMachine.cpp b/lib/Target/Mips/MipsTargetMachine.cpp index 7d73866562b..984c58eb6c1 100644 --- a/lib/Target/Mips/MipsTargetMachine.cpp +++ b/lib/Target/Mips/MipsTargetMachine.cpp @@ -13,13 +13,30 @@ #include "MipsTargetMachine.h" #include "Mips.h" +#include "Mips16FrameLowering.h" +#include "Mips16HardFloat.h" +#include "Mips16ISelDAGToDAG.h" +#include "Mips16ISelLowering.h" +#include "Mips16InstrInfo.h" #include "MipsFrameLowering.h" #include "MipsInstrInfo.h" -#include "llvm/PassManager.h" +#include "MipsModuleISelDAGToDAG.h" +#include "MipsOs16.h" +#include "MipsSEFrameLowering.h" +#include "MipsSEISelDAGToDAG.h" +#include "MipsSEISelLowering.h" +#include "MipsSEInstrInfo.h" +#include "llvm/Analysis/TargetTransformInfo.h" #include "llvm/CodeGen/Passes.h" +#include "llvm/PassManager.h" +#include "llvm/Support/Debug.h" #include "llvm/Support/TargetRegistry.h" +#include "llvm/Support/raw_ostream.h" +#include "llvm/Transforms/Scalar.h" using namespace llvm; +#define DEBUG_TYPE "mips" + extern "C" void LLVMInitializeMipsTarget() { // Register the target. RegisterTargetMachine X(TheMipsTarget); @@ -28,8 +45,36 @@ extern "C" void LLVMInitializeMipsTarget() { RegisterTargetMachine B(TheMips64elTarget); } -// DataLayout --> Big-endian, 32-bit pointer/ABI/alignment -// The stack is always 8 byte aligned +static std::string computeDataLayout(const MipsSubtarget &ST) { + std::string Ret = ""; + + // There are both little and big endian mips. + if (ST.isLittle()) + Ret += "e"; + else + Ret += "E"; + + Ret += "-m:m"; + + // Pointers are 32 bit on some ABIs. + if (!ST.isABI_N64()) + Ret += "-p:32:32"; + + // 8 and 16 bit integers only need no have natural alignment, but try to + // align them to 32 bits. 64 bit integers have natural alignment. + Ret += "-i8:8:32-i16:16:32-i64:64"; + + // 32 bit registers are always available and the stack is at least 64 bit + // aligned. On N64 64 bit registers are also available and the stack is + // 128 bit aligned. + if (ST.isABI_N64() || ST.isABI_N32()) + Ret += "-n32:64-S128"; + else + Ret += "-n32-S64"; + + return Ret; +} + // On function prologue, the stack is created by decrementing // its pointer. Once decremented, all references are done with positive // offset from the stack/frame pointer, using StackGrowsUp enables @@ -42,20 +87,51 @@ MipsTargetMachine(const Target &T, StringRef TT, CodeGenOpt::Level OL, bool isLittle) : LLVMTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL), - Subtarget(TT, CPU, FS, isLittle, RM), - DL(isLittle ? - (Subtarget.isABI_N64() ? - "e-p:64:64:64-i8:8:32-i16:16:32-i64:64:64-f128:128:128-n32" : - "e-p:32:32:32-i8:8:32-i16:16:32-i64:64:64-n32") : - (Subtarget.isABI_N64() ? - "E-p:64:64:64-i8:8:32-i16:16:32-i64:64:64-f128:128:128-n32" : - "E-p:32:32:32-i8:8:32-i16:16:32-i64:64:64-n32")), + Subtarget(TT, CPU, FS, isLittle, RM, this), + DL(computeDataLayout(Subtarget)), InstrInfo(MipsInstrInfo::create(*this)), FrameLowering(MipsFrameLowering::create(*this, Subtarget)), - TLInfo(*this), TSInfo(*this), JITInfo(), - ELFWriterInfo(false, isLittle), STTI(&TLInfo), VTTI(&TLInfo) { + TLInfo(MipsTargetLowering::create(*this)), TSInfo(*this), + InstrItins(Subtarget.getInstrItineraryData()), JITInfo() { + initAsmInfo(); +} + + +void MipsTargetMachine::setHelperClassesMips16() { + InstrInfoSE.swap(InstrInfo); + FrameLoweringSE.swap(FrameLowering); + TLInfoSE.swap(TLInfo); + if (!InstrInfo16) { + InstrInfo.reset(MipsInstrInfo::create(*this)); + FrameLowering.reset(MipsFrameLowering::create(*this, Subtarget)); + TLInfo.reset(MipsTargetLowering::create(*this)); + } else { + InstrInfo16.swap(InstrInfo); + FrameLowering16.swap(FrameLowering); + TLInfo16.swap(TLInfo); + } + assert(TLInfo && "null target lowering 16"); + assert(InstrInfo && "null instr info 16"); + assert(FrameLowering && "null frame lowering 16"); } +void MipsTargetMachine::setHelperClassesMipsSE() { + InstrInfo16.swap(InstrInfo); + FrameLowering16.swap(FrameLowering); + TLInfo16.swap(TLInfo); + if (!InstrInfoSE) { + InstrInfo.reset(MipsInstrInfo::create(*this)); + FrameLowering.reset(MipsFrameLowering::create(*this, Subtarget)); + TLInfo.reset(MipsTargetLowering::create(*this)); + } else { + InstrInfoSE.swap(InstrInfo); + FrameLoweringSE.swap(FrameLowering); + TLInfoSE.swap(TLInfo); + } + assert(TLInfo && "null target lowering in SE"); + assert(InstrInfo && "null instr info SE"); + assert(FrameLowering && "null frame lowering SE"); +} void MipsebTargetMachine::anchor() { } MipsebTargetMachine:: @@ -79,7 +155,13 @@ namespace { class MipsPassConfig : public TargetPassConfig { public: MipsPassConfig(MipsTargetMachine *TM, PassManagerBase &PM) - : TargetPassConfig(TM, PM) {} + : TargetPassConfig(TM, PM) { + // The current implementation of long branch pass requires a scratch + // register ($at) to be available before branch instructions. Tail merging + // can break this requirement, so disable it when long branch pass is + // enabled. + EnableTailMerge = !getMipsSubtarget().enableLongBranchPass(); + } MipsTargetMachine &getMipsTargetMachine() const { return getTM(); @@ -89,8 +171,13 @@ public: return *getMipsTargetMachine().getSubtargetImpl(); } - virtual bool addInstSelector(); - virtual bool addPreEmitPass(); + void addIRPasses() override; + bool addInstSelector() override; + void addMachineSSAOptimization() override; + bool addPreEmitPass() override; + + bool addPreRegAlloc() override; + }; } // namespace @@ -98,23 +185,67 @@ TargetPassConfig *MipsTargetMachine::createPassConfig(PassManagerBase &PM) { return new MipsPassConfig(this, PM); } +void MipsPassConfig::addIRPasses() { + TargetPassConfig::addIRPasses(); + if (getMipsSubtarget().os16()) + addPass(createMipsOs16(getMipsTargetMachine())); + if (getMipsSubtarget().inMips16HardFloat()) + addPass(createMips16HardFloat(getMipsTargetMachine())); + addPass(createPartiallyInlineLibCallsPass()); +} // Install an instruction selector pass using // the ISelDag to gen Mips code. bool MipsPassConfig::addInstSelector() { - addPass(createMipsISelDag(getMipsTargetMachine())); + if (getMipsSubtarget().allowMixed16_32()) { + addPass(createMipsModuleISelDag(getMipsTargetMachine())); + addPass(createMips16ISelDag(getMipsTargetMachine())); + addPass(createMipsSEISelDag(getMipsTargetMachine())); + } else { + addPass(createMipsISelDag(getMipsTargetMachine())); + } return false; } +void MipsPassConfig::addMachineSSAOptimization() { + addPass(createMipsOptimizePICCallPass(getMipsTargetMachine())); + TargetPassConfig::addMachineSSAOptimization(); +} + +bool MipsPassConfig::addPreRegAlloc() { + if (getOptLevel() == CodeGenOpt::None) { + addPass(createMipsOptimizePICCallPass(getMipsTargetMachine())); + return true; + } + else + return false; +} + +void MipsTargetMachine::addAnalysisPasses(PassManagerBase &PM) { + if (Subtarget.allowMixed16_32()) { + DEBUG(errs() << "No "); + //FIXME: The Basic Target Transform Info + // pass needs to become a function pass instead of + // being an immutable pass and then this method as it exists now + // would be unnecessary. + PM.add(createNoTargetTransformInfoPass()); + } else + LLVMTargetMachine::addAnalysisPasses(PM); + DEBUG(errs() << "Target Transform Info Pass Added\n"); +} + // Implemented by targets that want to run passes immediately before // machine code is emitted. return true if -print-machineinstrs should // print out the code after the passes. bool MipsPassConfig::addPreEmitPass() { MipsTargetMachine &TM = getMipsTargetMachine(); + const MipsSubtarget &Subtarget = TM.getSubtarget(); addPass(createMipsDelaySlotFillerPass(TM)); - // NOTE: long branch has not been implemented for mips16. - if (TM.getSubtarget().hasStandardEncoding()) + if (Subtarget.enableLongBranchPass()) addPass(createMipsLongBranchPass(TM)); + if (Subtarget.inMips16Mode() || + Subtarget.allowMixed16_32()) + addPass(createMipsConstantIslandPass(TM)); return true; }