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Add a new pass FunctionTargetTransformInfo. This pass serves as a
shim between the TargetTransformInfo immutable pass and the Subtarget via the TargetMachine and Function. Migrate a single call from BasicTargetTransformInfo as an example and provide shims where TargetMachine begins taking a Function to determine the subtarget. No functional change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218004 91177308-0d34-0410-b5e6-96231b3b80d8
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include/llvm/Analysis/FunctionTargetTransformInfo.h
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49
include/llvm/Analysis/FunctionTargetTransformInfo.h
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@ -0,0 +1,49 @@
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//===- llvm/Analysis/FunctionTargetTransformInfo.h --------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This pass wraps a TargetTransformInfo in a FunctionPass so that it can
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// forward along the current Function so that we can make target specific
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// decisions based on the particular subtarget specified for each Function.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_ANALYSIS_FUNCTIONTARGETTRANSFORMINFO_H
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#define LLVM_ANALYSIS_FUNCTIONTARGETTRANSFORMINFO_H
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#include "llvm/Pass.h"
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#include "TargetTransformInfo.h"
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namespace llvm {
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class FunctionTargetTransformInfo final : public FunctionPass {
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private:
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const Function *Fn;
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const TargetTransformInfo *TTI;
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FunctionTargetTransformInfo(const FunctionTargetTransformInfo &)
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LLVM_DELETED_FUNCTION;
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void operator=(const FunctionTargetTransformInfo &) LLVM_DELETED_FUNCTION;
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public:
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static char ID;
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FunctionTargetTransformInfo();
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// Implementation boilerplate.
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void getAnalysisUsage(AnalysisUsage &AU) const override;
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void releaseMemory() override;
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bool runOnFunction(Function &F) override;
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// Shimmed functions from TargetTransformInfo.
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void
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getUnrollingPreferences(Loop *L,
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TargetTransformInfo::UnrollingPreferences &UP) const {
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TTI->getUnrollingPreferences(Fn, L, UP);
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}
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};
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}
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#endif
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@ -28,6 +28,7 @@
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namespace llvm {
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class Function;
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class GlobalValue;
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class Loop;
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class Type;
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@ -227,7 +228,8 @@ public:
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/// \brief Get target-customized preferences for the generic loop unrolling
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/// transformation. The caller will initialize UP with the current
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/// target-independent defaults.
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virtual void getUnrollingPreferences(Loop *L, UnrollingPreferences &UP) const;
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virtual void getUnrollingPreferences(const Function *F, Loop *L,
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UnrollingPreferences &UP) const;
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/// @}
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@ -261,6 +261,7 @@ void initializeTailDuplicatePassPass(PassRegistry&);
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void initializeTargetPassConfigPass(PassRegistry&);
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void initializeDataLayoutPassPass(PassRegistry &);
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void initializeTargetTransformInfoAnalysisGroup(PassRegistry&);
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void initializeFunctionTargetTransformInfoPass(PassRegistry &);
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void initializeNoTTIPass(PassRegistry&);
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void initializeTargetLibraryInfoPass(PassRegistry&);
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void initializeAssumptionTrackerPass(PassRegistry &);
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@ -99,6 +99,9 @@ public:
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virtual const TargetSubtargetInfo *getSubtargetImpl() const {
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return nullptr;
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}
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virtual const TargetSubtargetInfo *getSubtargetImpl(const Function *) const {
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return getSubtargetImpl();
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}
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/// getSubtarget - This method returns a pointer to the specified type of
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/// TargetSubtargetInfo. In debug builds, it verifies that the object being
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@ -106,6 +109,9 @@ public:
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template<typename STC> const STC &getSubtarget() const {
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return *static_cast<const STC*>(getSubtargetImpl());
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}
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template <typename STC> const STC &getSubtarget(const Function *) const {
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return *static_cast<const STC*>(getSubtargetImpl());
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}
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/// \brief Reset the target options based on the function's attributes.
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void resetTargetOptions(const MachineFunction *MF) const;
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50
lib/Analysis/FunctionTargetTransformInfo.cpp
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50
lib/Analysis/FunctionTargetTransformInfo.cpp
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//===- llvm/Analysis/FunctionTargetTransformInfo.h --------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This pass wraps a TargetTransformInfo in a FunctionPass so that it can
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// forward along the current Function so that we can make target specific
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// decisions based on the particular subtarget specified for each Function.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/InitializePasses.h"
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#include "llvm/Analysis/FunctionTargetTransformInfo.h"
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using namespace llvm;
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#define DEBUG_TYPE "function-tti"
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static const char ftti_name[] = "Function TargetTransformInfo";
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INITIALIZE_PASS_BEGIN(FunctionTargetTransformInfo, "function_tti", ftti_name, false, true)
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INITIALIZE_AG_DEPENDENCY(TargetTransformInfo)
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INITIALIZE_PASS_END(FunctionTargetTransformInfo, "function_tti", ftti_name, false, true)
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char FunctionTargetTransformInfo::ID = 0;
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namespace llvm {
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FunctionPass *createFunctionTargetTransformInfoPass() {
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return new FunctionTargetTransformInfo();
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}
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}
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FunctionTargetTransformInfo::FunctionTargetTransformInfo()
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: FunctionPass(ID), Fn(nullptr), TTI(nullptr) {
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initializeFunctionTargetTransformInfoPass(*PassRegistry::getPassRegistry());
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}
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void FunctionTargetTransformInfo::getAnalysisUsage(AnalysisUsage &AU) const {
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AU.setPreservesAll();
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AU.addRequired<TargetTransformInfo>();
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}
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void FunctionTargetTransformInfo::releaseMemory() {}
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bool FunctionTargetTransformInfo::runOnFunction(Function &F) {
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Fn = &F;
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TTI = &getAnalysis<TargetTransformInfo>();
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return false;
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}
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@ -87,9 +87,10 @@ bool TargetTransformInfo::isLoweredToCall(const Function *F) const {
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return PrevTTI->isLoweredToCall(F);
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}
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void TargetTransformInfo::getUnrollingPreferences(Loop *L,
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void
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TargetTransformInfo::getUnrollingPreferences(const Function *F, Loop *L,
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UnrollingPreferences &UP) const {
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PrevTTI->getUnrollingPreferences(L, UP);
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PrevTTI->getUnrollingPreferences(F, L, UP);
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}
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bool TargetTransformInfo::isLegalAddImmediate(int64_t Imm) const {
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@ -487,8 +488,8 @@ struct NoTTI final : ImmutablePass, TargetTransformInfo {
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return true;
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}
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void getUnrollingPreferences(Loop *, UnrollingPreferences &) const override {
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}
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void getUnrollingPreferences(const Function *, Loop *,
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UnrollingPreferences &) const override {}
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bool isLegalAddImmediate(int64_t Imm) const override {
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return false;
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@ -92,7 +92,7 @@ public:
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unsigned getJumpBufSize() const override;
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bool shouldBuildLookupTables() const override;
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bool haveFastSqrt(Type *Ty) const override;
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void getUnrollingPreferences(Loop *L,
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void getUnrollingPreferences(const Function *F, Loop *L,
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UnrollingPreferences &UP) const override;
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/// @}
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@ -199,7 +199,7 @@ bool BasicTTI::haveFastSqrt(Type *Ty) const {
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return TLI->isTypeLegal(VT) && TLI->isOperationLegalOrCustom(ISD::FSQRT, VT);
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}
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void BasicTTI::getUnrollingPreferences(Loop *L,
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void BasicTTI::getUnrollingPreferences(const Function *F, Loop *L,
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UnrollingPreferences &UP) const {
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// This unrolling functionality is target independent, but to provide some
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// motivation for its intended use, for x86:
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@ -225,7 +225,7 @@ void BasicTTI::getUnrollingPreferences(Loop *L,
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// until someone finds a case where it matters in practice.
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unsigned MaxOps;
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const TargetSubtargetInfo *ST = &TM->getSubtarget<TargetSubtargetInfo>();
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const TargetSubtargetInfo *ST = &TM->getSubtarget<TargetSubtargetInfo>(F);
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if (PartialUnrollingThreshold.getNumOccurrences() > 0)
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MaxOps = PartialUnrollingThreshold;
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else if (ST->getSchedModel().LoopMicroOpBufferSize > 0)
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@ -38,6 +38,7 @@ void initializePPCTTIPass(PassRegistry &);
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namespace {
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class PPCTTI final : public ImmutablePass, public TargetTransformInfo {
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const TargetMachine *TM;
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const PPCSubtarget *ST;
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const PPCTargetLowering *TLI;
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@ -47,7 +48,7 @@ public:
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}
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PPCTTI(const PPCTargetMachine *TM)
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: ImmutablePass(ID), ST(TM->getSubtargetImpl()),
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: ImmutablePass(ID), TM(TM), ST(TM->getSubtargetImpl()),
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TLI(TM->getSubtargetImpl()->getTargetLowering()) {
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initializePPCTTIPass(*PassRegistry::getPassRegistry());
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}
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@ -80,8 +81,8 @@ public:
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Type *Ty) const override;
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PopcntSupportKind getPopcntSupport(unsigned TyWidth) const override;
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void getUnrollingPreferences(
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Loop *L, UnrollingPreferences &UP) const override;
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void getUnrollingPreferences(const Function *F, Loop *L,
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UnrollingPreferences &UP) const override;
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/// @}
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@ -269,8 +270,9 @@ unsigned PPCTTI::getIntImmCost(unsigned Opcode, unsigned Idx, const APInt &Imm,
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return PPCTTI::getIntImmCost(Imm, Ty);
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}
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void PPCTTI::getUnrollingPreferences(Loop *L, UnrollingPreferences &UP) const {
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if (ST->getDarwinDirective() == PPC::DIR_A2) {
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void PPCTTI::getUnrollingPreferences(const Function *F, Loop *L,
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UnrollingPreferences &UP) const {
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if (TM->getSubtarget<PPCSubtarget>(F).getDarwinDirective() == PPC::DIR_A2) {
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// The A2 is in-order with a deep pipeline, and concatenation unrolling
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// helps expose latency-hiding opportunities to the instruction scheduler.
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UP.Partial = UP.Runtime = true;
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bool hasBranchDivergence() const override;
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void getUnrollingPreferences(Loop *L,
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void getUnrollingPreferences(const Function *F, Loop *L,
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UnrollingPreferences &UP) const override;
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PopcntSupportKind getPopcntSupport(unsigned IntTyWidthInBit) const override;
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@ -99,7 +99,7 @@ llvm::createAMDGPUTargetTransformInfoPass(const AMDGPUTargetMachine *TM) {
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bool AMDGPUTTI::hasBranchDivergence() const { return true; }
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void AMDGPUTTI::getUnrollingPreferences(Loop *L,
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void AMDGPUTTI::getUnrollingPreferences(const Function *, Loop *L,
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UnrollingPreferences &UP) const {
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UP.Threshold = 300; // Twice the default.
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UP.Count = UINT_MAX;
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@ -15,6 +15,7 @@
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#include "llvm/Transforms/Scalar.h"
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#include "llvm/Analysis/AssumptionTracker.h"
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#include "llvm/Analysis/CodeMetrics.h"
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#include "llvm/Analysis/FunctionTargetTransformInfo.h"
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#include "llvm/Analysis/LoopPass.h"
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#include "llvm/Analysis/ScalarEvolution.h"
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#include "llvm/Analysis/TargetTransformInfo.h"
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@ -113,6 +114,7 @@ namespace {
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AU.addRequired<ScalarEvolution>();
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AU.addPreserved<ScalarEvolution>();
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AU.addRequired<TargetTransformInfo>();
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AU.addRequired<FunctionTargetTransformInfo>();
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// FIXME: Loop unroll requires LCSSA. And LCSSA requires dom info.
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// If loop unroll does not preserve dom info then LCSSA pass on next
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// loop will receive invalid dom info.
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@ -122,7 +124,7 @@ namespace {
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// Fill in the UnrollingPreferences parameter with values from the
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// TargetTransformationInfo.
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void getUnrollingPreferences(Loop *L, const TargetTransformInfo &TTI,
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void getUnrollingPreferences(Loop *L, const FunctionTargetTransformInfo &FTTI,
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TargetTransformInfo::UnrollingPreferences &UP) {
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UP.Threshold = CurrentThreshold;
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UP.OptSizeThreshold = OptSizeUnrollThreshold;
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@ -132,7 +134,7 @@ namespace {
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UP.MaxCount = UINT_MAX;
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UP.Partial = CurrentAllowPartial;
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UP.Runtime = CurrentRuntime;
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TTI.getUnrollingPreferences(L, UP);
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FTTI.getUnrollingPreferences(L, UP);
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}
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// Select and return an unroll count based on parameters from
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@ -185,6 +187,7 @@ char LoopUnroll::ID = 0;
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INITIALIZE_PASS_BEGIN(LoopUnroll, "loop-unroll", "Unroll loops", false, false)
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INITIALIZE_AG_DEPENDENCY(TargetTransformInfo)
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INITIALIZE_PASS_DEPENDENCY(AssumptionTracker)
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INITIALIZE_PASS_DEPENDENCY(FunctionTargetTransformInfo)
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INITIALIZE_PASS_DEPENDENCY(LoopInfo)
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INITIALIZE_PASS_DEPENDENCY(LoopSimplify)
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INITIALIZE_PASS_DEPENDENCY(LCSSA)
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@ -358,6 +361,8 @@ bool LoopUnroll::runOnLoop(Loop *L, LPPassManager &LPM) {
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LoopInfo *LI = &getAnalysis<LoopInfo>();
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ScalarEvolution *SE = &getAnalysis<ScalarEvolution>();
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const TargetTransformInfo &TTI = getAnalysis<TargetTransformInfo>();
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const FunctionTargetTransformInfo &FTTI =
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getAnalysis<FunctionTargetTransformInfo>();
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AssumptionTracker *AT = &getAnalysis<AssumptionTracker>();
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BasicBlock *Header = L->getHeader();
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@ -372,7 +377,7 @@ bool LoopUnroll::runOnLoop(Loop *L, LPPassManager &LPM) {
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bool HasPragma = PragmaFullUnroll || PragmaCount > 0;
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TargetTransformInfo::UnrollingPreferences UP;
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getUnrollingPreferences(L, TTI, UP);
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getUnrollingPreferences(L, FTTI, UP);
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// Find trip count and trip multiple if count is not available
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unsigned TripCount = 0;
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