Update prebuilt Clang to r353983e.HEADq10.0

clang 9.0.5 (based on r353983e) from build 5696680.

Bug: http://b/135931688
Bug: http://b/136008926
Test: N/A
Change-Id: I922d17410047d2e2df4625615352c588ee71b203

1 files changed, 223 insertions, 0 deletions

diff --git a/clang-r353983e/include/llvm/CodeGen/MachineOptimizationRemarkEmitter.h b/clang-r353983e/include/llvm/CodeGen/MachineOptimizationRemarkEmitter.h
new file mode 100644
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+++ b/clang-r353983e/include/llvm/CodeGen/MachineOptimizationRemarkEmitter.h
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+///===- MachineOptimizationRemarkEmitter.h - Opt Diagnostics -*- C++ -*----===//
+///
+/// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+/// See https://llvm.org/LICENSE.txt for license information.
+/// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+///
+///===---------------------------------------------------------------------===//
+/// \file
+/// Optimization diagnostic interfaces for machine passes.  It's packaged as an
+/// analysis pass so that by using this service passes become dependent on MBFI
+/// as well.  MBFI is used to compute the "hotness" of the diagnostic message.
+///
+///===---------------------------------------------------------------------===//
+
+#ifndef LLVM_CODEGEN_MACHINEOPTIMIZATIONREMARKEMITTER_H
+#define LLVM_CODEGEN_MACHINEOPTIMIZATIONREMARKEMITTER_H
+
+#include "llvm/Analysis/OptimizationRemarkEmitter.h"
+#include "llvm/CodeGen/MachineFunctionPass.h"
+
+namespace llvm {
+class MachineBasicBlock;
+class MachineBlockFrequencyInfo;
+class MachineInstr;
+
+/// Common features for diagnostics dealing with optimization remarks
+/// that are used by machine passes.
+class DiagnosticInfoMIROptimization : public DiagnosticInfoOptimizationBase {
+public:
+  DiagnosticInfoMIROptimization(enum DiagnosticKind Kind, const char *PassName,
+                                StringRef RemarkName,
+                                const DiagnosticLocation &Loc,
+                                const MachineBasicBlock *MBB)
+      : DiagnosticInfoOptimizationBase(Kind, DS_Remark, PassName, RemarkName,
+                                       MBB->getParent()->getFunction(), Loc),
+        MBB(MBB) {}
+
+  /// MI-specific kinds of diagnostic Arguments.
+  struct MachineArgument : public DiagnosticInfoOptimizationBase::Argument {
+    /// Print an entire MachineInstr.
+    MachineArgument(StringRef Key, const MachineInstr &MI);
+  };
+
+  static bool classof(const DiagnosticInfo *DI) {
+    return DI->getKind() >= DK_FirstMachineRemark &&
+           DI->getKind() <= DK_LastMachineRemark;
+  }
+
+  const MachineBasicBlock *getBlock() const { return MBB; }
+
+private:
+  const MachineBasicBlock *MBB;
+};
+
+/// Diagnostic information for applied optimization remarks.
+class MachineOptimizationRemark : public DiagnosticInfoMIROptimization {
+public:
+  /// \p PassName is the name of the pass emitting this diagnostic. If this name
+  /// matches the regular expression given in -Rpass=, then the diagnostic will
+  /// be emitted.  \p RemarkName is a textual identifier for the remark.  \p
+  /// Loc is the debug location and \p MBB is the block that the optimization
+  /// operates in.
+  MachineOptimizationRemark(const char *PassName, StringRef RemarkName,
+                            const DiagnosticLocation &Loc,
+                            const MachineBasicBlock *MBB)
+      : DiagnosticInfoMIROptimization(DK_MachineOptimizationRemark, PassName,
+                                      RemarkName, Loc, MBB) {}
+
+  static bool classof(const DiagnosticInfo *DI) {
+    return DI->getKind() == DK_MachineOptimizationRemark;
+  }
+
+  /// \see DiagnosticInfoOptimizationBase::isEnabled.
+  bool isEnabled() const override {
+    const Function &Fn = getFunction();
+    LLVMContext &Ctx = Fn.getContext();
+    return Ctx.getDiagHandlerPtr()->isPassedOptRemarkEnabled(getPassName());
+  }
+};
+
+/// Diagnostic information for missed-optimization remarks.
+class MachineOptimizationRemarkMissed : public DiagnosticInfoMIROptimization {
+public:
+  /// \p PassName is the name of the pass emitting this diagnostic. If this name
+  /// matches the regular expression given in -Rpass-missed=, then the
+  /// diagnostic will be emitted.  \p RemarkName is a textual identifier for the
+  /// remark.  \p Loc is the debug location and \p MBB is the block that the
+  /// optimization operates in.
+  MachineOptimizationRemarkMissed(const char *PassName, StringRef RemarkName,
+                                  const DiagnosticLocation &Loc,
+                                  const MachineBasicBlock *MBB)
+      : DiagnosticInfoMIROptimization(DK_MachineOptimizationRemarkMissed,
+                                      PassName, RemarkName, Loc, MBB) {}
+
+  static bool classof(const DiagnosticInfo *DI) {
+    return DI->getKind() == DK_MachineOptimizationRemarkMissed;
+  }
+
+  /// \see DiagnosticInfoOptimizationBase::isEnabled.
+  bool isEnabled() const override {
+    const Function &Fn = getFunction();
+    LLVMContext &Ctx = Fn.getContext();
+    return Ctx.getDiagHandlerPtr()->isMissedOptRemarkEnabled(getPassName());
+  }
+};
+
+/// Diagnostic information for optimization analysis remarks.
+class MachineOptimizationRemarkAnalysis : public DiagnosticInfoMIROptimization {
+public:
+  /// \p PassName is the name of the pass emitting this diagnostic. If this name
+  /// matches the regular expression given in -Rpass-analysis=, then the
+  /// diagnostic will be emitted.  \p RemarkName is a textual identifier for the
+  /// remark.  \p Loc is the debug location and \p MBB is the block that the
+  /// optimization operates in.
+  MachineOptimizationRemarkAnalysis(const char *PassName, StringRef RemarkName,
+                                    const DiagnosticLocation &Loc,
+                                    const MachineBasicBlock *MBB)
+      : DiagnosticInfoMIROptimization(DK_MachineOptimizationRemarkAnalysis,
+                                      PassName, RemarkName, Loc, MBB) {}
+
+  static bool classof(const DiagnosticInfo *DI) {
+    return DI->getKind() == DK_MachineOptimizationRemarkAnalysis;
+  }
+
+  /// \see DiagnosticInfoOptimizationBase::isEnabled.
+  bool isEnabled() const override {
+    const Function &Fn = getFunction();
+    LLVMContext &Ctx = Fn.getContext();
+    return Ctx.getDiagHandlerPtr()->isAnalysisRemarkEnabled(getPassName());
+  }
+};
+
+/// Extend llvm::ore:: with MI-specific helper names.
+namespace ore {
+using MNV = DiagnosticInfoMIROptimization::MachineArgument;
+}
+
+/// The optimization diagnostic interface.
+///
+/// It allows reporting when optimizations are performed and when they are not
+/// along with the reasons for it.  Hotness information of the corresponding
+/// code region can be included in the remark if DiagnosticsHotnessRequested is
+/// enabled in the LLVM context.
+class MachineOptimizationRemarkEmitter {
+public:
+  MachineOptimizationRemarkEmitter(MachineFunction &MF,
+                                   MachineBlockFrequencyInfo *MBFI)
+      : MF(MF), MBFI(MBFI) {}
+
+  /// Emit an optimization remark.
+  void emit(DiagnosticInfoOptimizationBase &OptDiag);
+
+  /// Whether we allow for extra compile-time budget to perform more
+  /// analysis to be more informative.
+  ///
+  /// This is useful to enable additional missed optimizations to be reported
+  /// that are normally too noisy.  In this mode, we can use the extra analysis
+  /// (1) to filter trivial false positives or (2) to provide more context so
+  /// that non-trivial false positives can be quickly detected by the user.
+  bool allowExtraAnalysis(StringRef PassName) const {
+    return (MF.getFunction().getContext().getDiagnosticsOutputFile() ||
+            MF.getFunction().getContext()
+            .getDiagHandlerPtr()->isAnyRemarkEnabled(PassName));
+  }
+
+  /// Take a lambda that returns a remark which will be emitted.  Second
+  /// argument is only used to restrict this to functions.
+  template <typename T>
+  void emit(T RemarkBuilder, decltype(RemarkBuilder()) * = nullptr) {
+    // Avoid building the remark unless we know there are at least *some*
+    // remarks enabled. We can't currently check whether remarks are requested
+    // for the calling pass since that requires actually building the remark.
+
+    if (MF.getFunction().getContext().getDiagnosticsOutputFile() ||
+        MF.getFunction().getContext().getDiagHandlerPtr()->isAnyRemarkEnabled()) {
+      auto R = RemarkBuilder();
+      emit((DiagnosticInfoOptimizationBase &)R);
+    }
+  }
+
+private:
+  MachineFunction &MF;
+
+  /// MBFI is only set if hotness is requested.
+  MachineBlockFrequencyInfo *MBFI;
+
+  /// Compute hotness from IR value (currently assumed to be a block) if PGO is
+  /// available.
+  Optional<uint64_t> computeHotness(const MachineBasicBlock &MBB);
+
+  /// Similar but use value from \p OptDiag and update hotness there.
+  void computeHotness(DiagnosticInfoMIROptimization &Remark);
+
+  /// Only allow verbose messages if we know we're filtering by hotness
+  /// (BFI is only set in this case).
+  bool shouldEmitVerbose() { return MBFI != nullptr; }
+};
+
+/// The analysis pass
+///
+/// Note that this pass shouldn't generally be marked as preserved by other
+/// passes.  It's holding onto BFI, so if the pass does not preserve BFI, BFI
+/// could be freed.
+class MachineOptimizationRemarkEmitterPass : public MachineFunctionPass {
+  std::unique_ptr<MachineOptimizationRemarkEmitter> ORE;
+
+public:
+  MachineOptimizationRemarkEmitterPass();
+
+  bool runOnMachineFunction(MachineFunction &MF) override;
+
+  void getAnalysisUsage(AnalysisUsage &AU) const override;
+
+  MachineOptimizationRemarkEmitter &getORE() {
+    assert(ORE && "pass not run yet");
+    return *ORE;
+  }
+
+  static char ID;
+};
+}
+
+#endif