(Re-landing) Expose a TargetMachine::getTargetTransformInfo function

Re-land r321234.  It had to be reverted because it broke the shared
library build.  The shared library build broke because there was a
missing LLVMBuild dependency from lib/Passes (which calls
TargetMachine::getTargetIRAnalysis) to lib/Target.  As far as I can
tell, this problem was always there but was somehow masked
before (perhaps because TargetMachine::getTargetIRAnalysis was a
virtual function).

Original commit message:

This makes the TargetMachine interface a bit simpler.  We still need
the std::function in TargetIRAnalysis to avoid having to add a
dependency from Analysis to Target.

See discussion:
http://lists.llvm.org/pipermail/llvm-dev/2017-December/119749.html

I avoided adding all of the backend owners to this review since the
change is simple, but let me know if you feel differently about this.

Reviewers: echristo, MatzeB, hfinkel

Reviewed By: hfinkel

Subscribers: jholewinski, jfb, arsenm, dschuff, mcrosier, sdardis, nemanjai, nhaehnle, javed.absar, sbc100, jgravelle-google, aheejin, kbarton, llvm-commits

Differential Revision: https://reviews.llvm.org/D41464

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@321375 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Target/TargetMachine.h

@@ -24,6 +24,7 @@
 
 namespace llvm {
 
+class Function;
 class GlobalValue;
 class MachineModuleInfo;
 class Mangler;
@@ -38,6 +39,7 @@ class PassManagerBuilder;
 class Target;
 class TargetIntrinsicInfo;
 class TargetIRAnalysis;
+class TargetTransformInfo;
 class TargetLoweringObjectFile;
 class TargetPassConfig;
 class TargetSubtargetInfo;
@@ -204,7 +206,13 @@ class TargetMachine {
   /// This is used to construct the new pass manager's target IR analysis pass,
   /// set up appropriately for this target machine. Even the old pass manager
   /// uses this to answer queries about the IR.
-  virtual TargetIRAnalysis getTargetIRAnalysis();
+  TargetIRAnalysis getTargetIRAnalysis();
+
+  /// \brief Return a TargetTransformInfo for a given function.
+  ///
+  /// The returned TargetTransformInfo is specialized to the subtarget
+  /// corresponding to \p F.
+  virtual TargetTransformInfo getTargetTransformInfo(const Function &F);
 
   /// Allow the target to modify the pass manager, e.g. by calling
   /// PassManagerBuilder::addExtension.
@@ -280,11 +288,11 @@ class LLVMTargetMachine : public TargetMachine {
   void initAsmInfo();
 
 public:
-  /// \brief Get a TargetIRAnalysis implementation for the target.
+  /// \brief Get a TargetTransformInfo implementation for the target.
   ///
-  /// This analysis will produce a TTI result which uses the common code
-  /// generator to answer queries about the IR.
-  TargetIRAnalysis getTargetIRAnalysis() override;
+  /// The TTI returned uses the common code generator to answer queries about
+  /// the IR.
+  TargetTransformInfo getTargetTransformInfo(const Function &F) override;
 
   /// Create a pass configuration object to be used by addPassToEmitX methods
   /// for generating a pipeline of CodeGen passes.

lib/CodeGen/LLVMTargetMachine.cpp

@@ -81,10 +81,9 @@ LLVMTargetMachine::LLVMTargetMachine(const Target &T,
   this->OptLevel = OL;
 }
 
-TargetIRAnalysis LLVMTargetMachine::getTargetIRAnalysis() {
-  return TargetIRAnalysis([this](const Function &F) {
-    return TargetTransformInfo(BasicTTIImpl(this, F));
-  });
+TargetTransformInfo
+LLVMTargetMachine::getTargetTransformInfo(const Function &F) {
+  return TargetTransformInfo(BasicTTIImpl(this, F));
 }
 
 /// addPassesToX helper drives creation and initialization of TargetPassConfig.

lib/Passes/LLVMBuild.txt

@@ -19,4 +19,4 @@
 type = Library
 name = Passes
 parent = Libraries
-required_libraries = Analysis CodeGen Core IPO InstCombine Scalar Support TransformUtils Vectorize Instrumentation
+required_libraries = Analysis CodeGen Core IPO InstCombine Scalar Support Target TransformUtils Vectorize Instrumentation

lib/Target/AArch64/AArch64TargetMachine.cpp

@@ -346,10 +346,9 @@ class AArch64PassConfig : public TargetPassConfig {
 
 } // end anonymous namespace
 
-TargetIRAnalysis AArch64TargetMachine::getTargetIRAnalysis() {
-  return TargetIRAnalysis([this](const Function &F) {
-    return TargetTransformInfo(AArch64TTIImpl(this, F));
-  });
+TargetTransformInfo
+AArch64TargetMachine::getTargetTransformInfo(const Function &F) {
+  return TargetTransformInfo(AArch64TTIImpl(this, F));
 }
 
 TargetPassConfig *AArch64TargetMachine::createPassConfig(PassManagerBase &PM) {

lib/Target/AArch64/AArch64TargetMachine.h

@@ -44,8 +44,7 @@ class AArch64TargetMachine : public LLVMTargetMachine {
   // Pass Pipeline Configuration
   TargetPassConfig *createPassConfig(PassManagerBase &PM) override;
 
-  /// \brief Get the TargetIRAnalysis for this target.
-  TargetIRAnalysis getTargetIRAnalysis() override;
+  TargetTransformInfo getTargetTransformInfo(const Function &F) override;
 
   TargetLoweringObjectFile* getObjFileLowering() const override {
     return TLOF.get();

lib/Target/AMDGPU/AMDGPUTargetMachine.cpp

@@ -571,10 +571,9 @@ class GCNPassConfig final : public AMDGPUPassConfig {
 
 } // end anonymous namespace
 
-TargetIRAnalysis AMDGPUTargetMachine::getTargetIRAnalysis() {
-  return TargetIRAnalysis([this](const Function &F) {
-    return TargetTransformInfo(AMDGPUTTIImpl(this, F));
-  });
+TargetTransformInfo
+AMDGPUTargetMachine::getTargetTransformInfo(const Function &F) {
+  return TargetTransformInfo(AMDGPUTTIImpl(this, F));
 }
 
 void AMDGPUPassConfig::addEarlyCSEOrGVNPass() {
@@ -898,4 +897,3 @@ void GCNPassConfig::addPreEmitPass() {
 TargetPassConfig *GCNTargetMachine::createPassConfig(PassManagerBase &PM) {
   return new GCNPassConfig(*this, PM);
 }
-

lib/Target/AMDGPU/AMDGPUTargetMachine.h

@@ -55,7 +55,7 @@ class AMDGPUTargetMachine : public LLVMTargetMachine {
   const AMDGPUIntrinsicInfo *getIntrinsicInfo() const override {
     return &IntrinsicInfo;
   }
-  TargetIRAnalysis getTargetIRAnalysis() override;
+  TargetTransformInfo getTargetTransformInfo(const Function &F) override;
 
   TargetLoweringObjectFile *getObjFileLowering() const override {
     return TLOF.get();

lib/Target/ARC/ARCTargetMachine.cpp

@@ -88,8 +88,7 @@ extern "C" void LLVMInitializeARCTarget() {
   RegisterTargetMachine<ARCTargetMachine> X(getTheARCTarget());
 }
 
-TargetIRAnalysis ARCTargetMachine::getTargetIRAnalysis() {
-  return TargetIRAnalysis([this](const Function &F) {
-    return TargetTransformInfo(ARCTTIImpl(this, F));
-  });
+TargetTransformInfo
+ARCTargetMachine::getTargetTransformInfo(const Function &F) {
+  return TargetTransformInfo(ARCTTIImpl(this, F));
 }

lib/Target/ARC/ARCTargetMachine.h

@@ -40,7 +40,7 @@ class ARCTargetMachine : public LLVMTargetMachine {
   // Pass Pipeline Configuration
   TargetPassConfig *createPassConfig(PassManagerBase &PM) override;
 
-  TargetIRAnalysis getTargetIRAnalysis() override;
+  TargetTransformInfo getTargetTransformInfo(const Function &F) override;
   TargetLoweringObjectFile *getObjFileLowering() const override {
     return TLOF.get();
   }

lib/Target/ARM/ARMTargetMachine.cpp

@@ -283,10 +283,9 @@ ARMBaseTargetMachine::getSubtargetImpl(const Function &F) const {
   return I.get();
 }
 
-TargetIRAnalysis ARMBaseTargetMachine::getTargetIRAnalysis() {
-  return TargetIRAnalysis([this](const Function &F) {
-    return TargetTransformInfo(ARMTTIImpl(this, F));
-  });
+TargetTransformInfo
+ARMBaseTargetMachine::getTargetTransformInfo(const Function &F) {
+  return TargetTransformInfo(ARMTTIImpl(this, F));
 }
 
 ARMLETargetMachine::ARMLETargetMachine(const Target &T, const Triple &TT,

lib/Target/ARM/ARMTargetMachine.h

@@ -53,8 +53,7 @@ class ARMBaseTargetMachine : public LLVMTargetMachine {
   const ARMSubtarget *getSubtargetImpl() const = delete;
   bool isLittleEndian() const { return isLittle; }
 
-  /// \brief Get the TargetIRAnalysis for this target.
-  TargetIRAnalysis getTargetIRAnalysis() override;
+  TargetTransformInfo getTargetTransformInfo(const Function &F) override;
 
   // Pass Pipeline Configuration
   TargetPassConfig *createPassConfig(PassManagerBase &PM) override;

lib/Target/Hexagon/HexagonTargetMachine.cpp

@@ -258,10 +258,9 @@ void HexagonTargetMachine::adjustPassManager(PassManagerBuilder &PMB) {
     });
 }
 
-TargetIRAnalysis HexagonTargetMachine::getTargetIRAnalysis() {
-  return TargetIRAnalysis([this](const Function &F) {
-    return TargetTransformInfo(HexagonTTIImpl(this, F));
-  });
+TargetTransformInfo
+HexagonTargetMachine::getTargetTransformInfo(const Function &F) {
+  return TargetTransformInfo(HexagonTTIImpl(this, F));
 }
 
 

lib/Target/Hexagon/HexagonTargetMachine.h

@@ -39,7 +39,7 @@ class HexagonTargetMachine : public LLVMTargetMachine {
 
   void adjustPassManager(PassManagerBuilder &PMB) override;
   TargetPassConfig *createPassConfig(PassManagerBase &PM) override;
-  TargetIRAnalysis getTargetIRAnalysis() override;
+  TargetTransformInfo getTargetTransformInfo(const Function &F) override;
 
   HexagonTargetObjectFile *getObjFileLowering() const override {
     return static_cast<HexagonTargetObjectFile*>(TLOF.get());

lib/Target/Lanai/LanaiTargetMachine.cpp

@@ -74,10 +74,9 @@ LanaiTargetMachine::LanaiTargetMachine(const Target &T, const Triple &TT,
   initAsmInfo();
 }
 
-TargetIRAnalysis LanaiTargetMachine::getTargetIRAnalysis() {
-  return TargetIRAnalysis([this](const Function &F) {
-    return TargetTransformInfo(LanaiTTIImpl(this, F));
-  });
+TargetTransformInfo
+LanaiTargetMachine::getTargetTransformInfo(const Function &F) {
+  return TargetTransformInfo(LanaiTTIImpl(this, F));
 }
 
 namespace {

lib/Target/Lanai/LanaiTargetMachine.h

@@ -42,7 +42,7 @@ class LanaiTargetMachine : public LLVMTargetMachine {
     return &Subtarget;
   }
 
-  TargetIRAnalysis getTargetIRAnalysis() override;
+  TargetTransformInfo getTargetTransformInfo(const Function &F) override;
 
   // Pass Pipeline Configuration
   TargetPassConfig *createPassConfig(PassManagerBase &pass_manager) override;

lib/Target/Mips/MipsTargetMachine.cpp

@@ -259,17 +259,16 @@ void MipsPassConfig::addPreRegAlloc() {
   addPass(createMipsOptimizePICCallPass());
 }
 
-TargetIRAnalysis MipsTargetMachine::getTargetIRAnalysis() {
-  return TargetIRAnalysis([this](const Function &F) {
-    if (Subtarget->allowMixed16_32()) {
-      DEBUG(errs() << "No Target Transform Info Pass Added\n");
-      // FIXME: This is no longer necessary as the TTI returned is per-function.
-      return TargetTransformInfo(F.getParent()->getDataLayout());
-    }
-
-    DEBUG(errs() << "Target Transform Info Pass Added\n");
-    return TargetTransformInfo(BasicTTIImpl(this, F));
-  });
+TargetTransformInfo
+MipsTargetMachine::getTargetTransformInfo(const Function &F) {
+  if (Subtarget->allowMixed16_32()) {
+    DEBUG(errs() << "No Target Transform Info Pass Added\n");
+    // FIXME: This is no longer necessary as the TTI returned is per-function.
+    return TargetTransformInfo(F.getParent()->getDataLayout());
+  }
+
+  DEBUG(errs() << "Target Transform Info Pass Added\n");
+  return TargetTransformInfo(BasicTTIImpl(this, F));
 }
 
 // Implemented by targets that want to run passes immediately before

lib/Target/Mips/MipsTargetMachine.h

@@ -44,7 +44,7 @@ class MipsTargetMachine : public LLVMTargetMachine {
                     CodeGenOpt::Level OL, bool JIT, bool isLittle);
   ~MipsTargetMachine() override;
 
-  TargetIRAnalysis getTargetIRAnalysis() override;
+  TargetTransformInfo getTargetTransformInfo(const Function &F) override;
 
   const MipsSubtarget *getSubtargetImpl() const {
     if (Subtarget)

lib/Target/NVPTX/NVPTXTargetMachine.cpp

@@ -180,10 +180,9 @@ void NVPTXTargetMachine::adjustPassManager(PassManagerBuilder &Builder) {
     });
 }
 
-TargetIRAnalysis NVPTXTargetMachine::getTargetIRAnalysis() {
-  return TargetIRAnalysis([this](const Function &F) {
-    return TargetTransformInfo(NVPTXTTIImpl(this, F));
-  });
+TargetTransformInfo
+NVPTXTargetMachine::getTargetTransformInfo(const Function &F) {
+  return TargetTransformInfo(NVPTXTTIImpl(this, F));
 }
 
 void NVPTXPassConfig::addEarlyCSEOrGVNPass() {

lib/Target/NVPTX/NVPTXTargetMachine.h

@@ -63,7 +63,7 @@ class NVPTXTargetMachine : public LLVMTargetMachine {
 
   void adjustPassManager(PassManagerBuilder &) override;
 
-  TargetIRAnalysis getTargetIRAnalysis() override;
+  TargetTransformInfo getTargetTransformInfo(const Function &F) override;
 
   bool isMachineVerifierClean() const override {
     return false;

lib/Target/PowerPC/PPCTargetMachine.cpp

@@ -451,8 +451,7 @@ void PPCPassConfig::addPreEmitPass() {
   addPass(createPPCBranchSelectionPass(), false);
 }
 
-TargetIRAnalysis PPCTargetMachine::getTargetIRAnalysis() {
-  return TargetIRAnalysis([this](const Function &F) {
-    return TargetTransformInfo(PPCTTIImpl(this, F));
-  });
+TargetTransformInfo
+PPCTargetMachine::getTargetTransformInfo(const Function &F) {
+  return TargetTransformInfo(PPCTTIImpl(this, F));
 }

lib/Target/PowerPC/PPCTargetMachine.h

@@ -49,7 +49,7 @@ class PPCTargetMachine final : public LLVMTargetMachine {
   // Pass Pipeline Configuration
   TargetPassConfig *createPassConfig(PassManagerBase &PM) override;
 
-  TargetIRAnalysis getTargetIRAnalysis() override;
+  TargetTransformInfo getTargetTransformInfo(const Function &F) override;
 
   TargetLoweringObjectFile *getObjFileLowering() const override {
     return TLOF.get();

lib/Target/SystemZ/SystemZTargetMachine.cpp

@@ -257,8 +257,7 @@ TargetPassConfig *SystemZTargetMachine::createPassConfig(PassManagerBase &PM) {
   return new SystemZPassConfig(*this, PM);
 }
 
-TargetIRAnalysis SystemZTargetMachine::getTargetIRAnalysis() {
-  return TargetIRAnalysis([this](const Function &F) {
-    return TargetTransformInfo(SystemZTTIImpl(this, F));
-  });
+TargetTransformInfo
+SystemZTargetMachine::getTargetTransformInfo(const Function &F) {
+  return TargetTransformInfo(SystemZTTIImpl(this, F));
 }

lib/Target/SystemZ/SystemZTargetMachine.h

@@ -44,7 +44,7 @@ class SystemZTargetMachine : public LLVMTargetMachine {
 
   // Override LLVMTargetMachine
   TargetPassConfig *createPassConfig(PassManagerBase &PM) override;
-  TargetIRAnalysis getTargetIRAnalysis() override;
+  TargetTransformInfo getTargetTransformInfo(const Function &F) override;
 
   TargetLoweringObjectFile *getObjFileLowering() const override {
     return TLOF.get();

lib/Target/TargetMachine.cpp

@@ -219,10 +219,8 @@ CodeGenOpt::Level TargetMachine::getOptLevel() const { return OptLevel; }
 
 void TargetMachine::setOptLevel(CodeGenOpt::Level Level) { OptLevel = Level; }
 
-TargetIRAnalysis TargetMachine::getTargetIRAnalysis() {
-  return TargetIRAnalysis([](const Function &F) {
-    return TargetTransformInfo(F.getParent()->getDataLayout());
-  });
+TargetTransformInfo TargetMachine::getTargetTransformInfo(const Function &F) {
+  return TargetTransformInfo(F.getParent()->getDataLayout());
 }
 
 void TargetMachine::getNameWithPrefix(SmallVectorImpl<char> &Name,
@@ -244,3 +242,10 @@ MCSymbol *TargetMachine::getSymbol(const GlobalValue *GV) const {
   getNameWithPrefix(NameStr, GV, TLOF->getMangler());
   return TLOF->getContext().getOrCreateSymbol(NameStr);
 }
+
+TargetIRAnalysis TargetMachine::getTargetIRAnalysis() {
+  // Since Analysis can't depend on Target, use a std::function to invert the
+  // dependency.
+  return TargetIRAnalysis(
+      [this](const Function &F) { return this->getTargetTransformInfo(F); });
+}

lib/Target/WebAssembly/WebAssemblyTargetMachine.cpp

@@ -146,10 +146,9 @@ class WebAssemblyPassConfig final : public TargetPassConfig {
 };
 } // end anonymous namespace
 
-TargetIRAnalysis WebAssemblyTargetMachine::getTargetIRAnalysis() {
-  return TargetIRAnalysis([this](const Function &F) {
-    return TargetTransformInfo(WebAssemblyTTIImpl(this, F));
-  });
+TargetTransformInfo
+WebAssemblyTargetMachine::getTargetTransformInfo(const Function &F) {
+  return TargetTransformInfo(WebAssemblyTTIImpl(this, F));
 }
 
 TargetPassConfig *

lib/Target/WebAssembly/WebAssemblyTargetMachine.h

@@ -43,8 +43,7 @@ class WebAssemblyTargetMachine final : public LLVMTargetMachine {
     return TLOF.get();
   }
 
-  /// \brief Get the TargetIRAnalysis for this target.
-  TargetIRAnalysis getTargetIRAnalysis() override;
+  TargetTransformInfo getTargetTransformInfo(const Function &F) override;
 
   bool usesPhysRegsForPEI() const override { return false; }
 };

lib/Target/X86/X86TargetMachine.cpp

@@ -281,10 +281,9 @@ UseVZeroUpper("x86-use-vzeroupper", cl::Hidden,
 // X86 TTI query.
 //===----------------------------------------------------------------------===//
 
-TargetIRAnalysis X86TargetMachine::getTargetIRAnalysis() {
-  return TargetIRAnalysis([this](const Function &F) {
-    return TargetTransformInfo(X86TTIImpl(this, F));
-  });
+TargetTransformInfo
+X86TargetMachine::getTargetTransformInfo(const Function &F) {
+  return TargetTransformInfo(X86TTIImpl(this, F));
 }
 
 //===----------------------------------------------------------------------===//

lib/Target/X86/X86TargetMachine.h

@@ -45,7 +45,7 @@ class X86TargetMachine final : public LLVMTargetMachine {
   // attributes of each function.
   const X86Subtarget *getSubtargetImpl() const = delete;
 
-  TargetIRAnalysis getTargetIRAnalysis() override;
+  TargetTransformInfo getTargetTransformInfo(const Function &F) override;
 
   // Set up the pass pipeline.
   TargetPassConfig *createPassConfig(PassManagerBase &PM) override;

lib/Target/XCore/XCoreTargetMachine.cpp

@@ -108,8 +108,7 @@ extern "C" void LLVMInitializeXCoreTarget() {
   RegisterTargetMachine<XCoreTargetMachine> X(getTheXCoreTarget());
 }
 
-TargetIRAnalysis XCoreTargetMachine::getTargetIRAnalysis() {
-  return TargetIRAnalysis([this](const Function &F) {
-    return TargetTransformInfo(XCoreTTIImpl(this, F));
-  });
+TargetTransformInfo
+XCoreTargetMachine::getTargetTransformInfo(const Function &F) {
+  return TargetTransformInfo(XCoreTTIImpl(this, F));
 }