//===----------------------------------------------------------------------===//
#include "NVPTXTargetMachine.h"
-#include "NVPTX.h"
-#include "NVPTXSplitBBatBar.h"
-#include "NVPTXLowerAggrCopies.h"
#include "MCTargetDesc/NVPTXMCAsmInfo.h"
+#include "NVPTX.h"
#include "NVPTXAllocaHoisting.h"
-#include "llvm/PassManager.h"
+#include "NVPTXLowerAggrCopies.h"
+#include "NVPTXTargetObjectFile.h"
+#include "NVPTXTargetTransformInfo.h"
#include "llvm/Analysis/Passes.h"
-#include "llvm/Analysis/Verifier.h"
-#include "llvm/Assembly/PrintModulePass.h"
-#include "llvm/ADT/OwningPtr.h"
#include "llvm/CodeGen/AsmPrinter.h"
#include "llvm/CodeGen/MachineFunctionAnalysis.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/CodeGen/Passes.h"
+#include "llvm/IR/DataLayout.h"
+#include "llvm/IR/IRPrintingPasses.h"
+#include "llvm/IR/LegacyPassManager.h"
+#include "llvm/IR/Verifier.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCInstrInfo.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSubtargetInfo.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/FormattedStream.h"
#include "llvm/Support/TargetRegistry.h"
#include "llvm/Support/raw_ostream.h"
-#include "llvm/DataLayout.h"
#include "llvm/Target/TargetInstrInfo.h"
#include "llvm/Target/TargetLowering.h"
#include "llvm/Target/TargetLoweringObjectFile.h"
#include "llvm/Target/TargetRegisterInfo.h"
#include "llvm/Target/TargetSubtargetInfo.h"
#include "llvm/Transforms/Scalar.h"
-#include "llvm/Support/CommandLine.h"
-#include "llvm/Support/Debug.h"
-#include "llvm/Support/FormattedStream.h"
-#include "llvm/Support/TargetRegistry.h"
-
using namespace llvm;
+namespace llvm {
+void initializeNVVMReflectPass(PassRegistry&);
+void initializeGenericToNVVMPass(PassRegistry&);
+void initializeNVPTXAllocaHoistingPass(PassRegistry &);
+void initializeNVPTXAssignValidGlobalNamesPass(PassRegistry&);
+void initializeNVPTXFavorNonGenericAddrSpacesPass(PassRegistry &);
+void initializeNVPTXLowerAggrCopiesPass(PassRegistry &);
+void initializeNVPTXLowerKernelArgsPass(PassRegistry &);
+void initializeNVPTXLowerAllocaPass(PassRegistry &);
+}
extern "C" void LLVMInitializeNVPTXTarget() {
// Register the target.
RegisterTargetMachine<NVPTXTargetMachine32> X(TheNVPTXTarget32);
RegisterTargetMachine<NVPTXTargetMachine64> Y(TheNVPTXTarget64);
- RegisterMCAsmInfo<NVPTXMCAsmInfo> A(TheNVPTXTarget32);
- RegisterMCAsmInfo<NVPTXMCAsmInfo> B(TheNVPTXTarget64);
-
+ // FIXME: This pass is really intended to be invoked during IR optimization,
+ // but it's very NVPTX-specific.
+ PassRegistry &PR = *PassRegistry::getPassRegistry();
+ initializeNVVMReflectPass(PR);
+ initializeGenericToNVVMPass(PR);
+ initializeNVPTXAllocaHoistingPass(PR);
+ initializeNVPTXAssignValidGlobalNamesPass(PR);
+ initializeNVPTXFavorNonGenericAddrSpacesPass(PR);
+ initializeNVPTXLowerKernelArgsPass(PR);
+ initializeNVPTXLowerAllocaPass(PR);
+ initializeNVPTXLowerAggrCopiesPass(PR);
}
-NVPTXTargetMachine::NVPTXTargetMachine(const Target &T,
- StringRef TT,
- StringRef CPU,
- StringRef FS,
- const TargetOptions& Options,
- Reloc::Model RM,
- CodeModel::Model CM,
- CodeGenOpt::Level OL,
- bool is64bit)
-: LLVMTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL),
- Subtarget(TT, CPU, FS, is64bit),
- DL(Subtarget.getDataLayout()),
- InstrInfo(*this), TLInfo(*this), TSInfo(*this), FrameLowering(*this,is64bit)
-/*FrameInfo(TargetFrameInfo::StackGrowsUp, 8, 0)*/ {
+static std::string computeDataLayout(bool is64Bit) {
+ std::string Ret = "e";
+
+ if (!is64Bit)
+ Ret += "-p:32:32";
+
+ Ret += "-i64:64-v16:16-v32:32-n16:32:64";
+
+ return Ret;
}
+NVPTXTargetMachine::NVPTXTargetMachine(const Target &T, const Triple &TT,
+ StringRef CPU, StringRef FS,
+ const TargetOptions &Options,
+ Reloc::Model RM, CodeModel::Model CM,
+ CodeGenOpt::Level OL, bool is64bit)
+ : LLVMTargetMachine(T, computeDataLayout(is64bit), TT, CPU, FS, Options, RM,
+ CM, OL),
+ is64bit(is64bit), TLOF(make_unique<NVPTXTargetObjectFile>()),
+ Subtarget(TT, CPU, FS, *this) {
+ if (TT.getOS() == Triple::NVCL)
+ drvInterface = NVPTX::NVCL;
+ else
+ drvInterface = NVPTX::CUDA;
+ initAsmInfo();
+}
+NVPTXTargetMachine::~NVPTXTargetMachine() {}
void NVPTXTargetMachine32::anchor() {}
-NVPTXTargetMachine32::NVPTXTargetMachine32(const Target &T, StringRef TT,
+NVPTXTargetMachine32::NVPTXTargetMachine32(const Target &T, const Triple &TT,
StringRef CPU, StringRef FS,
const TargetOptions &Options,
Reloc::Model RM, CodeModel::Model CM,
CodeGenOpt::Level OL)
-: NVPTXTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL, false) {
-}
+ : NVPTXTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL, false) {}
void NVPTXTargetMachine64::anchor() {}
-NVPTXTargetMachine64::NVPTXTargetMachine64(const Target &T, StringRef TT,
+NVPTXTargetMachine64::NVPTXTargetMachine64(const Target &T, const Triple &TT,
StringRef CPU, StringRef FS,
const TargetOptions &Options,
Reloc::Model RM, CodeModel::Model CM,
CodeGenOpt::Level OL)
-: NVPTXTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL, true) {
-}
-
+ : NVPTXTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL, true) {}
-namespace llvm {
+namespace {
class NVPTXPassConfig : public TargetPassConfig {
public:
NVPTXPassConfig(NVPTXTargetMachine *TM, PassManagerBase &PM)
- : TargetPassConfig(TM, PM) {}
+ : TargetPassConfig(TM, PM) {}
NVPTXTargetMachine &getNVPTXTargetMachine() const {
return getTM<NVPTXTargetMachine>();
}
- virtual bool addInstSelector();
- virtual bool addPreRegAlloc();
+ void addIRPasses() override;
+ bool addInstSelector() override;
+ void addPostRegAlloc() override;
+ void addMachineSSAOptimization() override;
+
+ FunctionPass *createTargetRegisterAllocator(bool) override;
+ void addFastRegAlloc(FunctionPass *RegAllocPass) override;
+ void addOptimizedRegAlloc(FunctionPass *RegAllocPass) override;
+
+private:
+ // if the opt level is aggressive, add GVN; otherwise, add EarlyCSE.
+ void addEarlyCSEOrGVNPass();
};
-}
+} // end anonymous namespace
TargetPassConfig *NVPTXTargetMachine::createPassConfig(PassManagerBase &PM) {
NVPTXPassConfig *PassConfig = new NVPTXPassConfig(this, PM);
return PassConfig;
}
+TargetIRAnalysis NVPTXTargetMachine::getTargetIRAnalysis() {
+ return TargetIRAnalysis([this](Function &F) {
+ return TargetTransformInfo(NVPTXTTIImpl(this, F));
+ });
+}
+
+void NVPTXPassConfig::addEarlyCSEOrGVNPass() {
+ if (getOptLevel() == CodeGenOpt::Aggressive)
+ addPass(createGVNPass());
+ else
+ addPass(createEarlyCSEPass());
+}
+
+void NVPTXPassConfig::addIRPasses() {
+ // The following passes are known to not play well with virtual regs hanging
+ // around after register allocation (which in our case, is *all* registers).
+ // We explicitly disable them here. We do, however, need some functionality
+ // of the PrologEpilogCodeInserter pass, so we emulate that behavior in the
+ // NVPTXPrologEpilog pass (see NVPTXPrologEpilogPass.cpp).
+ disablePass(&PrologEpilogCodeInserterID);
+ disablePass(&MachineCopyPropagationID);
+ disablePass(&TailDuplicateID);
+
+ addPass(createNVPTXImageOptimizerPass());
+ addPass(createNVPTXAssignValidGlobalNamesPass());
+ addPass(createGenericToNVVMPass());
+
+ // === Propagate special address spaces ===
+ addPass(createNVPTXLowerKernelArgsPass(&getNVPTXTargetMachine()));
+ // NVPTXLowerKernelArgs emits alloca for byval parameters which can often
+ // be eliminated by SROA.
+ addPass(createSROAPass());
+ addPass(createNVPTXLowerAllocaPass());
+ addPass(createNVPTXFavorNonGenericAddrSpacesPass());
+ // FavorNonGenericAddrSpaces shortcuts unnecessary addrspacecasts, and leave
+ // them unused. We could remove dead code in an ad-hoc manner, but that
+ // requires manual work and might be error-prone.
+ addPass(createDeadCodeEliminationPass());
+
+ // === Straight-line scalar optimizations ===
+ addPass(createSeparateConstOffsetFromGEPPass());
+ addPass(createSpeculativeExecutionPass());
+ // ReassociateGEPs exposes more opportunites for SLSR. See
+ // the example in reassociate-geps-and-slsr.ll.
+ addPass(createStraightLineStrengthReducePass());
+ // SeparateConstOffsetFromGEP and SLSR creates common expressions which GVN or
+ // EarlyCSE can reuse. GVN generates significantly better code than EarlyCSE
+ // for some of our benchmarks.
+ addEarlyCSEOrGVNPass();
+ // Run NaryReassociate after EarlyCSE/GVN to be more effective.
+ addPass(createNaryReassociatePass());
+ // NaryReassociate on GEPs creates redundant common expressions, so run
+ // EarlyCSE after it.
+ addPass(createEarlyCSEPass());
+
+ // === LSR and other generic IR passes ===
+ TargetPassConfig::addIRPasses();
+ // EarlyCSE is not always strong enough to clean up what LSR produces. For
+ // example, GVN can combine
+ //
+ // %0 = add %a, %b
+ // %1 = add %b, %a
+ //
+ // and
+ //
+ // %0 = shl nsw %a, 2
+ // %1 = shl %a, 2
+ //
+ // but EarlyCSE can do neither of them.
+ addEarlyCSEOrGVNPass();
+}
+
bool NVPTXPassConfig::addInstSelector() {
+ const NVPTXSubtarget &ST = *getTM<NVPTXTargetMachine>().getSubtargetImpl();
+
addPass(createLowerAggrCopies());
- addPass(createSplitBBatBarPass());
addPass(createAllocaHoisting());
addPass(createNVPTXISelDag(getNVPTXTargetMachine(), getOptLevel()));
- addPass(createVectorElementizePass(getNVPTXTargetMachine()));
+
+ if (!ST.hasImageHandles())
+ addPass(createNVPTXReplaceImageHandlesPass());
+
return false;
}
-bool NVPTXPassConfig::addPreRegAlloc() {
- return false;
+void NVPTXPassConfig::addPostRegAlloc() {
+ addPass(createNVPTXPrologEpilogPass(), false);
+ // NVPTXPrologEpilogPass calculates frame object offset and replace frame
+ // index with VRFrame register. NVPTXPeephole need to be run after that and
+ // will replace VRFrame with VRFrameLocal when possible.
+ addPass(createNVPTXPeephole());
+}
+
+FunctionPass *NVPTXPassConfig::createTargetRegisterAllocator(bool) {
+ return nullptr; // No reg alloc
+}
+
+void NVPTXPassConfig::addFastRegAlloc(FunctionPass *RegAllocPass) {
+ assert(!RegAllocPass && "NVPTX uses no regalloc!");
+ addPass(&PHIEliminationID);
+ addPass(&TwoAddressInstructionPassID);
+}
+
+void NVPTXPassConfig::addOptimizedRegAlloc(FunctionPass *RegAllocPass) {
+ assert(!RegAllocPass && "NVPTX uses no regalloc!");
+
+ addPass(&ProcessImplicitDefsID);
+ addPass(&LiveVariablesID);
+ addPass(&MachineLoopInfoID);
+ addPass(&PHIEliminationID);
+
+ addPass(&TwoAddressInstructionPassID);
+ addPass(&RegisterCoalescerID);
+
+ // PreRA instruction scheduling.
+ if (addPass(&MachineSchedulerID))
+ printAndVerify("After Machine Scheduling");
+
+
+ addPass(&StackSlotColoringID);
+
+ // FIXME: Needs physical registers
+ //addPass(&PostRAMachineLICMID);
+
+ printAndVerify("After StackSlotColoring");
+}
+
+void NVPTXPassConfig::addMachineSSAOptimization() {
+ // Pre-ra tail duplication.
+ if (addPass(&EarlyTailDuplicateID))
+ printAndVerify("After Pre-RegAlloc TailDuplicate");
+
+ // Optimize PHIs before DCE: removing dead PHI cycles may make more
+ // instructions dead.
+ addPass(&OptimizePHIsID);
+
+ // This pass merges large allocas. StackSlotColoring is a different pass
+ // which merges spill slots.
+ addPass(&StackColoringID);
+
+ // If the target requests it, assign local variables to stack slots relative
+ // to one another and simplify frame index references where possible.
+ addPass(&LocalStackSlotAllocationID);
+
+ // With optimization, dead code should already be eliminated. However
+ // there is one known exception: lowered code for arguments that are only
+ // used by tail calls, where the tail calls reuse the incoming stack
+ // arguments directly (see t11 in test/CodeGen/X86/sibcall.ll).
+ addPass(&DeadMachineInstructionElimID);
+ printAndVerify("After codegen DCE pass");
+
+ // Allow targets to insert passes that improve instruction level parallelism,
+ // like if-conversion. Such passes will typically need dominator trees and
+ // loop info, just like LICM and CSE below.
+ if (addILPOpts())
+ printAndVerify("After ILP optimizations");
+
+ addPass(&MachineLICMID);
+ addPass(&MachineCSEID);
+
+ addPass(&MachineSinkingID);
+ printAndVerify("After Machine LICM, CSE and Sinking passes");
+
+ addPass(&PeepholeOptimizerID);
+ printAndVerify("After codegen peephole optimization pass");
}
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