Revert "[WIP] Build assume from call"

caused build bot failure

This reverts commit 780d2c532fe5ca4a368c5e631197a839e03a3cc4.

diff --git a/llvm/include/llvm/IR/Attributes.h b/llvm/include/llvm/IR/Attributes.h
index 3ef8a3b..cb4b5b7 100644 (file)
--- a/llvm/include/llvm/IR/Attributes.h
+++ b/llvm/include/llvm/IR/Attributes.h
@@ -107,10 +107,6 @@ public:
                                         const Optional<unsigned> &NumElemsArg);
   static Attribute getWithByValType(LLVMContext &Context, Type *Ty);
 
-  static Attribute::AttrKind getAttrKindFromName(StringRef AttrName);
-
-  static StringRef getNameFromAttrKind(Attribute::AttrKind AttrKind);
-
   //===--------------------------------------------------------------------===//
   // Attribute Accessors
   //===--------------------------------------------------------------------===//

diff --git a/llvm/include/llvm/Transforms/Utils/KnowledgeRetention.h b/llvm/include/llvm/Transforms/Utils/KnowledgeRetention.h
deleted file mode 100644 (file)
index 348bb6b..0000000
--- a/llvm/include/llvm/Transforms/Utils/KnowledgeRetention.h
+++ /dev/null
@@ -1,41 +0,0 @@
-//===- KnowledgeRetention.h - utilities to preserve informations *- 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
-//
-//===----------------------------------------------------------------------===//
-//
-// This file contain tools to preserve informations. They should be used before
-// performing a transformation moving and deleting instruction as those
-// transformation may remove or worsen information that can be derived from te
-// IR.
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef LLVM_TRANSFORMS_UTILS_ASSUMEBUILDER_H
-#define LLVM_TRANSFORMS_UTILS_ASSUMEBUILDER_H
-
-#include "llvm/IR/Instruction.h"
-#include "llvm/IR/PassManager.h"
-
-namespace llvm {
-
-/// Build a call to llvm.assume to preserve informations that can be derived
-/// from the given instruction.
-/// If no information derived from \p I, this call returns null.
-/// The returned instruction is not inserted anywhere.
-CallInst *BuildAssumeFromInst(const Instruction *I, Module *M);
-CallInst *BuildAssumeFromInst(Instruction *I) {
-  return BuildAssumeFromInst(I, I->getModule());
-}
-
-/// This pass will try to build an llvm.assume for every instruction in the
-/// function. Its main purpose is testing.
-struct AssumeBuilderPass : public PassInfoMixin<AssumeBuilderPass> {
-  PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
-};
-
-} // namespace llvm
-
-#endif

diff --git a/llvm/lib/IR/Attributes.cpp b/llvm/lib/IR/Attributes.cpp
index 78ee00d..b184aca 100644 (file)
--- a/llvm/lib/IR/Attributes.cpp
+++ b/llvm/lib/IR/Attributes.cpp
@@ -176,29 +176,6 @@ Attribute::getWithAllocSizeArgs(LLVMContext &Context, unsigned ElemSizeArg,
   return get(Context, AllocSize, packAllocSizeArgs(ElemSizeArg, NumElemsArg));
 }
 
-Attribute::AttrKind Attribute::getAttrKindFromName(StringRef AttrName) {
-  return StringSwitch<Attribute::AttrKind>(AttrName)
-#define GET_ATTR_NAMES
-#define ATTRIBUTE_ENUM(ENUM_NAME, DISPLAY_NAME)                                \
-  .Case(#DISPLAY_NAME, Attribute::ENUM_NAME)
-#include "llvm/IR/Attributes.inc"
-      .Default(Attribute::None);
-}
-
-StringRef Attribute::getNameFromAttrKind(Attribute::AttrKind AttrKind) {
-  switch (AttrKind) {
-#define GET_ATTR_NAMES
-#define ATTRIBUTE_ENUM(ENUM_NAME, DISPLAY_NAME)                                \
-  case AttrKind::ENUM_NAME:                                                    \
-    return #DISPLAY_NAME;
-#include "llvm/IR/Attributes.inc"
-  case AttrKind::None:
-    return "none";
-  default:
-    llvm_unreachable("invalid Kind");
-  }
-}
-
 //===----------------------------------------------------------------------===//
 // Attribute Accessor Methods
 //===----------------------------------------------------------------------===//

diff --git a/llvm/lib/IR/Core.cpp b/llvm/lib/IR/Core.cpp
index 3b4224d..11deab8 100644 (file)
--- a/llvm/lib/IR/Core.cpp
+++ b/llvm/lib/IR/Core.cpp
@@ -127,8 +127,17 @@ unsigned LLVMGetMDKindID(const char *Name, unsigned SLen) {
   return LLVMGetMDKindIDInContext(LLVMGetGlobalContext(), Name, SLen);
 }
 
+static Attribute::AttrKind getAttrKindFromName(StringRef AttrName) {
+  return StringSwitch<Attribute::AttrKind>(AttrName)
+#define GET_ATTR_NAMES
+#define ATTRIBUTE_ENUM(ENUM_NAME, DISPLAY_NAME)                                \
+  .Case(#DISPLAY_NAME, Attribute::ENUM_NAME)
+#include "llvm/IR/Attributes.inc"
+      .Default(Attribute::None);
+}
+
 unsigned LLVMGetEnumAttributeKindForName(const char *Name, size_t SLen) {
-  return Attribute::getAttrKindFromName(StringRef(Name, SLen));
+  return getAttrKindFromName(StringRef(Name, SLen));
 }
 
 unsigned LLVMGetLastEnumAttributeKind(void) {

diff --git a/llvm/lib/Passes/PassBuilder.cpp b/llvm/lib/Passes/PassBuilder.cpp
index 8dc1468..6d74a81 100644 (file)
--- a/llvm/lib/Passes/PassBuilder.cpp
+++ b/llvm/lib/Passes/PassBuilder.cpp
@@ -173,7 +173,6 @@
 #include "llvm/Transforms/Utils/CanonicalizeAliases.h"
 #include "llvm/Transforms/Utils/EntryExitInstrumenter.h"
 #include "llvm/Transforms/Utils/InjectTLIMappings.h"
-#include "llvm/Transforms/Utils/KnowledgeRetention.h"
 #include "llvm/Transforms/Utils/LCSSA.h"
 #include "llvm/Transforms/Utils/LibCallsShrinkWrap.h"
 #include "llvm/Transforms/Utils/LoopSimplify.h"

diff --git a/llvm/lib/Passes/PassRegistry.def b/llvm/lib/Passes/PassRegistry.def
index 86d2298..4c3cbe4 100644 (file)
--- a/llvm/lib/Passes/PassRegistry.def
+++ b/llvm/lib/Passes/PassRegistry.def
@@ -160,7 +160,6 @@ FUNCTION_PASS("aa-eval", AAEvaluator())
 FUNCTION_PASS("adce", ADCEPass())
 FUNCTION_PASS("add-discriminators", AddDiscriminatorsPass())
 FUNCTION_PASS("aggressive-instcombine", AggressiveInstCombinePass())
-FUNCTION_PASS("assume-builder", AssumeBuilderPass())
 FUNCTION_PASS("alignment-from-assumptions", AlignmentFromAssumptionsPass())
 FUNCTION_PASS("bdce", BDCEPass())
 FUNCTION_PASS("bounds-checking", BoundsCheckingPass())

diff --git a/llvm/lib/Transforms/Utils/CMakeLists.txt b/llvm/lib/Transforms/Utils/CMakeLists.txt
index 9bd4943..7c0864a 100644 (file)
--- a/llvm/lib/Transforms/Utils/CMakeLists.txt
+++ b/llvm/lib/Transforms/Utils/CMakeLists.txt
@@ -28,7 +28,6 @@ add_llvm_component_library(LLVMTransformUtils
   InjectTLIMappings.cpp
   InstructionNamer.cpp
   IntegerDivision.cpp
-  KnowledgeRetention.cpp
   LCSSA.cpp
   LibCallsShrinkWrap.cpp
   Local.cpp

diff --git a/llvm/lib/Transforms/Utils/KnowledgeRetention.cpp b/llvm/lib/Transforms/Utils/KnowledgeRetention.cpp
deleted file mode 100644 (file)
index 2f82f9f..0000000
--- a/llvm/lib/Transforms/Utils/KnowledgeRetention.cpp
+++ /dev/null
@@ -1,164 +0,0 @@
-//===- KnowledgeRetention.h - utilities to preserve informations *- 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
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/Transforms/Utils/KnowledgeRetention.h"
-#include "llvm/ADT/DenseSet.h"
-#include "llvm/IR/InstIterator.h"
-#include "llvm/IR/IntrinsicInst.h"
-#include "llvm/IR/Module.h"
-#include "llvm/Support/CommandLine.h"
-
-using namespace llvm;
-
-namespace {
-
-cl::opt<bool> ShouldPreserveAllAttributes(
-    "assume-preserve-all", cl::init(false), cl::Hidden,
-    cl::desc("enable preservation of all attrbitues. even those that are "
-             "unlikely to be usefull"));
-
-struct AssumedKnowledge {
-  const char *Name;
-  Value *Argument;
-  enum {
-    None,
-    Empty,
-    Tombstone,
-  };
-  /// Contain the argument and a flag if needed.
-  llvm::PointerIntPair<Value *, 2> WasOn;
-};
-
-} // namespace
-
-namespace llvm {
-
-template <> struct DenseMapInfo<AssumedKnowledge> {
-  static AssumedKnowledge getEmptyKey() {
-    return {nullptr, nullptr, {nullptr, AssumedKnowledge::Empty}};
-  }
-  static AssumedKnowledge getTombstoneKey() {
-    return {nullptr, nullptr, {nullptr, AssumedKnowledge::Tombstone}};
-  }
-  static unsigned getHashValue(const AssumedKnowledge &AK) {
-    return hash_combine(AK.Name, AK.Argument, AK.WasOn.getPointer());
-  }
-  static bool isEqual(const AssumedKnowledge &LHS,
-                      const AssumedKnowledge &RHS) {
-    return LHS.WasOn == RHS.WasOn && LHS.Name == RHS.Name &&
-           LHS.Argument == RHS.Argument;
-  }
-};
-
-} // namespace llvm
-
-namespace {
-
-/// Deterministically compare OperandBundleDef.
-/// The ordering is:
-/// - by the name of the attribute, (doesn't change)
-/// - then by the Value of the argument, (doesn't change)
-/// - lastly by the Name of the current Value it WasOn. (may change)
-/// This order is deterministic and allows looking for the right kind of
-/// attribute with binary search. However finding the right WasOn needs to be
-/// done via linear search because values can get remplaced.
-bool isLowerOpBundle(const OperandBundleDef &LHS, const OperandBundleDef &RHS) {
-  auto getTuple = [](const OperandBundleDef &Op) {
-    return std::make_tuple(
-        Op.getTag(),
-        Op.input_size() < 2
-            ? 0
-            : cast<ConstantInt>(*std::next(Op.input_begin()))->getZExtValue(),
-        Op.input_size() < 1 ? StringRef("") : (*Op.input_begin())->getName());
-  };
-  return getTuple(LHS) < getTuple(RHS);
-}
-
-/// This class contain all knowledge that have been gather while building an
-/// llvm.assume and the function to manipulate it.
-struct AssumeBuilderState {
-  Module *M;
-
-  SmallDenseSet<AssumedKnowledge, 8> AssumedKnowledgeSet;
-
-  AssumeBuilderState(Module *M) : M(M) {}
-
-  void addAttribute(Attribute Attr, Value *WasOn) {
-    StringRef Name;
-    Value *AttrArg = nullptr;
-    if (Attr.isStringAttribute())
-      if (ShouldPreserveAllAttributes)
-        Name = Attr.getKindAsString();
-      else
-        return;
-    else
-      Name = Attribute::getNameFromAttrKind(Attr.getKindAsEnum());
-    if (Attr.isIntAttribute())
-      AttrArg = ConstantInt::get(Type::getInt64Ty(M->getContext()),
-                                 Attr.getValueAsInt());
-    AssumedKnowledgeSet.insert(
-        {Name.data(), AttrArg, {WasOn, AssumedKnowledge::None}});
-  }
-
-  void addCall(const CallBase *Call) {
-    auto addAttrList = [&](AttributeList AttrList) {
-      for (unsigned Idx = AttributeList::FirstArgIndex;
-           Idx < AttrList.getNumAttrSets(); Idx++)
-        for (Attribute Attr : AttrList.getAttributes(Idx))
-          addAttribute(Attr, Call->getArgOperand(Idx - 1));
-      if (ShouldPreserveAllAttributes)
-        for (Attribute Attr : AttrList.getFnAttributes())
-          addAttribute(Attr, nullptr);
-    };
-    addAttrList(Call->getAttributes());
-    if (Function *Fn = Call->getCalledFunction())
-      addAttrList(Fn->getAttributes());
-  }
-
-  CallInst *build() {
-    if (AssumedKnowledgeSet.empty())
-      return nullptr;
-    Function *FnAssume = Intrinsic::getDeclaration(M, Intrinsic::assume);
-    LLVMContext &C = M->getContext();
-    SmallVector<OperandBundleDef, 8> OpBundle;
-    for (const AssumedKnowledge &Elem : AssumedKnowledgeSet) {
-      SmallVector<Value *, 2> Args;
-      if (Elem.WasOn.getPointer())
-        Args.push_back(Elem.WasOn.getPointer());
-      if (Elem.Argument)
-        Args.push_back(Elem.Argument);
-      OpBundle.push_back(OperandBundleDefT<Value *>(Elem.Name, Args));
-    }
-    llvm::sort(OpBundle, isLowerOpBundle);
-    return CallInst::Create(
-        FnAssume, ArrayRef<Value *>({ConstantInt::getTrue(C)}), OpBundle);
-  }
-
-  void addInstruction(const Instruction *I) {
-    if (auto *Call = dyn_cast<CallBase>(I))
-      addCall(Call);
-    // TODO: Add support for the other Instructions.
-    // TODO: Maybe we should look around and merge with other llvm.assume.
-  }
-};
-
-} // namespace
-
-CallInst *llvm::BuildAssumeFromInst(const Instruction *I, Module *M) {
-  AssumeBuilderState Builder(M);
-  Builder.addInstruction(I);
-  return Builder.build();
-}
-
-PreservedAnalyses AssumeBuilderPass::run(Function &F,
-                                         FunctionAnalysisManager &AM) {
-  for (Instruction &I : instructions(F))
-    if (Instruction *Assume = BuildAssumeFromInst(&I))
-      Assume->insertBefore(&I);
-  return PreservedAnalyses::all();
-}

diff --git a/llvm/test/Transforms/Util/assume-builder.ll b/llvm/test/Transforms/Util/assume-builder.ll
deleted file mode 100644 (file)
index 9df5a0b..0000000
--- a/llvm/test/Transforms/Util/assume-builder.ll
+++ /dev/null
@@ -1,66 +0,0 @@
-; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
-; RUN: opt -passes='assume-builder' -S %s | FileCheck %s --check-prefixes=BASIC
-; RUN: opt -passes='assume-builder' --assume-preserve-all -S %s | FileCheck %s --check-prefixes=ALL
-
-declare void @func(i32*, i32*)
-declare void @func_cold(i32*) cold
-declare void @func_strbool(i32*) "no-jump-tables"
-declare void @func_many(i32*) "no-jump-tables" nounwind "less-precise-fpmad" willreturn norecurse
-declare void @func_argattr(i32* align 8, i32* nonnull) nounwind
-
-define void @test(i32* %P, i32* %P1, i32* %P2, i32* %P3) {
-; BASIC-LABEL: @test(
-; BASIC-NEXT:    call void @llvm.assume(i1 true) [ "dereferenceable"(i32* [[P:%.*]], i64 16), "nonnull"(i32* [[P]]) ]
-; BASIC-NEXT:    call void @func(i32* nonnull dereferenceable(16) [[P]], i32* null)
-; BASIC-NEXT:    call void @llvm.assume(i1 true) [ "dereferenceable"(i32* [[P1:%.*]], i64 12), "nonnull"(i32* [[P]]) ]
-; BASIC-NEXT:    call void @func(i32* dereferenceable(12) [[P1]], i32* nonnull [[P]])
-; BASIC-NEXT:    call void @llvm.assume(i1 true) [ "dereferenceable"(i32* [[P1]], i64 12) ]
-; BASIC-NEXT:    call void @func_cold(i32* dereferenceable(12) [[P1]]) #0
-; BASIC-NEXT:    call void @llvm.assume(i1 true) [ "dereferenceable"(i32* [[P1]], i64 12) ]
-; BASIC-NEXT:    call void @func_cold(i32* dereferenceable(12) [[P1]])
-; BASIC-NEXT:    call void @func(i32* [[P1]], i32* [[P]])
-; BASIC-NEXT:    call void @func_strbool(i32* [[P1]])
-; BASIC-NEXT:    call void @llvm.assume(i1 true) [ "dereferenceable"(i32* [[P]], i64 8), "dereferenceable"(i32* [[P]], i64 16) ]
-; BASIC-NEXT:    call void @func(i32* dereferenceable(16) [[P]], i32* dereferenceable(8) [[P]])
-; BASIC-NEXT:    call void @llvm.assume(i1 true) [ "align"(i32* [[P1]], i64 8) ]
-; BASIC-NEXT:    call void @func_many(i32* align 8 [[P1]])
-; BASIC-NEXT:    call void @llvm.assume(i1 true) [ "align"(i32* [[P2:%.*]], i64 8), "nonnull"(i32* [[P3:%.*]]) ]
-; BASIC-NEXT:    call void @func_argattr(i32* [[P2]], i32* [[P3]])
-; BASIC-NEXT:    call void @llvm.assume(i1 true) [ "nonnull"(i32* [[P]]), "nonnull"(i32* [[P1]]) ]
-; BASIC-NEXT:    call void @func(i32* nonnull [[P1]], i32* nonnull [[P]])
-; BASIC-NEXT:    ret void
-;
-; ALL-LABEL: @test(
-; ALL-NEXT:    call void @llvm.assume(i1 true) [ "dereferenceable"(i32* [[P:%.*]], i64 16), "nonnull"(i32* [[P]]) ]
-; ALL-NEXT:    call void @func(i32* nonnull dereferenceable(16) [[P]], i32* null)
-; ALL-NEXT:    call void @llvm.assume(i1 true) [ "dereferenceable"(i32* [[P1:%.*]], i64 12), "nonnull"(i32* [[P]]) ]
-; ALL-NEXT:    call void @func(i32* dereferenceable(12) [[P1]], i32* nonnull [[P]])
-; ALL-NEXT:    call void @llvm.assume(i1 true) [ "cold"(), "dereferenceable"(i32* [[P1]], i64 12) ]
-; ALL-NEXT:    call void @func_cold(i32* dereferenceable(12) [[P1]]) #0
-; ALL-NEXT:    call void @llvm.assume(i1 true) [ "cold"(), "dereferenceable"(i32* [[P1]], i64 12) ]
-; ALL-NEXT:    call void @func_cold(i32* dereferenceable(12) [[P1]])
-; ALL-NEXT:    call void @func(i32* [[P1]], i32* [[P]])
-; ALL-NEXT:    call void @llvm.assume(i1 true) [ "no-jump-tables"() ]
-; ALL-NEXT:    call void @func_strbool(i32* [[P1]])
-; ALL-NEXT:    call void @llvm.assume(i1 true) [ "dereferenceable"(i32* [[P]], i64 8), "dereferenceable"(i32* [[P]], i64 16) ]
-; ALL-NEXT:    call void @func(i32* dereferenceable(16) [[P]], i32* dereferenceable(8) [[P]])
-; ALL-NEXT:    call void @llvm.assume(i1 true) [ "align"(i32* [[P1]], i64 8), "less-precise-fpmad"(), "no-jump-tables"(), "norecurse"(), "nounwind"(), "willreturn"() ]
-; ALL-NEXT:    call void @func_many(i32* align 8 [[P1]])
-; ALL-NEXT:    call void @llvm.assume(i1 true) [ "align"(i32* [[P2:%.*]], i64 8), "nonnull"(i32* [[P3:%.*]]), "nounwind"() ]
-; ALL-NEXT:    call void @func_argattr(i32* [[P2]], i32* [[P3]])
-; ALL-NEXT:    call void @llvm.assume(i1 true) [ "nonnull"(i32* [[P]]), "nonnull"(i32* [[P1]]) ]
-; ALL-NEXT:    call void @func(i32* nonnull [[P1]], i32* nonnull [[P]])
-; ALL-NEXT:    ret void
-;
-  call void @func(i32* nonnull dereferenceable(16) %P, i32* null)
-  call void @func(i32* dereferenceable(12) %P1, i32* nonnull %P)
-  call void @func_cold(i32* dereferenceable(12) %P1) cold
-  call void @func_cold(i32* dereferenceable(12) %P1)
-  call void @func(i32* %P1, i32* %P)
-  call void @func_strbool(i32* %P1)
-  call void @func(i32* dereferenceable(16) %P, i32* dereferenceable(8) %P)
-  call void @func_many(i32* align 8 %P1)
-  call void @func_argattr(i32* %P2, i32* %P3)
-  call void @func(i32* nonnull %P1, i32* nonnull %P)
-  ret void
-}