X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTarget%2FMips%2FMipsTargetMachine.cpp;h=984c58eb6c1e3a138818bac9ed964ef32af43625;hb=61e341e0bfcc83ec865fe763759e66ab3c2feba5;hp=6088ceedcc009b0c6ceccddcfbbde6e81d1e3293;hpb=2d24e2a396a1d211baaeedf32148a3b657240170;p=oota-llvm.git diff --git a/lib/Target/Mips/MipsTargetMachine.cpp b/lib/Target/Mips/MipsTargetMachine.cpp index 6088ceedcc0..984c58eb6c1 100644 --- a/lib/Target/Mips/MipsTargetMachine.cpp +++ b/lib/Target/Mips/MipsTargetMachine.cpp @@ -11,22 +11,70 @@ // //===----------------------------------------------------------------------===// -#include "Mips.h" #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 "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); RegisterTargetMachine Y(TheMipselTarget); - RegisterTargetMachine A(TheMips64Target); - RegisterTargetMachine B(TheMips64elTarget); + RegisterTargetMachine A(TheMips64Target); + RegisterTargetMachine B(TheMips64elTarget); +} + +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; } -// DataLayout --> Big-endian, 32-bit pointer/ABI/alignment -// The stack is always 8 byte aligned // 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 @@ -39,19 +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), - DataLayout(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")), - InstrInfo(*this), - FrameLowering(Subtarget), - TLInfo(*this), TSInfo(*this), JITInfo() { + Subtarget(TT, CPU, FS, isLittle, RM, this), + DL(computeDataLayout(Subtarget)), + InstrInfo(MipsInstrInfo::create(*this)), + FrameLowering(MipsFrameLowering::create(*this, Subtarget)), + 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:: @@ -70,55 +150,103 @@ MipselTargetMachine(const Target &T, StringRef TT, CodeGenOpt::Level OL) : MipsTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL, true) {} -void Mips64ebTargetMachine::anchor() { } +namespace { +/// Mips Code Generator Pass Configuration Options. +class MipsPassConfig : public TargetPassConfig { +public: + MipsPassConfig(MipsTargetMachine *TM, PassManagerBase &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(); + } -Mips64ebTargetMachine:: -Mips64ebTargetMachine(const Target &T, StringRef TT, - StringRef CPU, StringRef FS, const TargetOptions &Options, - Reloc::Model RM, CodeModel::Model CM, - CodeGenOpt::Level OL) - : MipsTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL, false) {} + MipsTargetMachine &getMipsTargetMachine() const { + return getTM(); + } -void Mips64elTargetMachine::anchor() { } + const MipsSubtarget &getMipsSubtarget() const { + return *getMipsTargetMachine().getSubtargetImpl(); + } -Mips64elTargetMachine:: -Mips64elTargetMachine(const Target &T, StringRef TT, - StringRef CPU, StringRef FS, const TargetOptions &Options, - Reloc::Model RM, CodeModel::Model CM, - CodeGenOpt::Level OL) - : MipsTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL, true) {} + void addIRPasses() override; + bool addInstSelector() override; + void addMachineSSAOptimization() override; + bool addPreEmitPass() override; + + bool addPreRegAlloc() override; + +}; +} // namespace + +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 MipsTargetMachine:: -addInstSelector(PassManagerBase &PM) -{ - PM.add(createMipsISelDag(*this)); +bool MipsPassConfig::addInstSelector() { + 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 MipsTargetMachine:: -addPreEmitPass(PassManagerBase &PM) -{ - PM.add(createMipsDelaySlotFillerPass(*this)); - return true; -} +bool MipsPassConfig::addPreEmitPass() { + MipsTargetMachine &TM = getMipsTargetMachine(); + const MipsSubtarget &Subtarget = TM.getSubtarget(); + addPass(createMipsDelaySlotFillerPass(TM)); -bool MipsTargetMachine:: -addPreRegAlloc(PassManagerBase &PM) { - // Do not restore $gp if target is Mips64. - // In N32/64, $gp is a callee-saved register. - if (!Subtarget.hasMips64()) - PM.add(createMipsEmitGPRestorePass(*this)); - return true; -} + if (Subtarget.enableLongBranchPass()) + addPass(createMipsLongBranchPass(TM)); + if (Subtarget.inMips16Mode() || + Subtarget.allowMixed16_32()) + addPass(createMipsConstantIslandPass(TM)); -bool MipsTargetMachine:: -addPostRegAlloc(PassManagerBase &PM) { - PM.add(createMipsExpandPseudoPass(*this)); return true; }