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[Remarks] Add analysis remarks for memset/memcpy/memmove lengths

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Differential revision: https://reviews.llvm.org/D102452
This commit is contained in:
Jon Roelofs 2021-05-18 16:11:44 -07:00
parent 65d0264ba2
commit 4bf69fb52b
10 changed files with 905 additions and 289 deletions
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3
llvm/include/llvm/Analysis/OptimizationRemarkEmitter.h
View File

@ -76,6 +76,9 @@ public:
if (F->getContext().getLLVMRemarkStreamer() ||
F->getContext().getDiagHandlerPtr()->isAnyRemarkEnabled()) {
auto R = RemarkBuilder();
static_assert(
std::is_base_of<DiagnosticInfoOptimizationBase, decltype(R)>::value,
"the lambda passed to emit() must return a remark");
emit((DiagnosticInfoOptimizationBase &)R);
}
}

70
llvm/include/llvm/Transforms/Utils/AutoInitRemark.h → llvm/include/llvm/Transforms/Utils/MemoryOpRemark.h
View File

@ -1,4 +1,4 @@
//===- AutoInitRemark.h - Auto-init remark analysis -*- C++ -------------*-===//
//===- MemoryOpRemark.h - Memory operation remark analysis -*- C++ ------*-===//
//
// The LLVM Compiler Infrastructure
//
@ -7,13 +7,13 @@
//
//===----------------------------------------------------------------------===//
//
// Provide more information about instructions with a "auto-init"
// !annotation metadata.
// Provide more information about instructions that copy, move, or initialize
// memory, including those with a "auto-init" !annotation metadata.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_TRANSFORMS_UTILS_AUTOINITREMARK_H
#define LLVM_TRANSFORMS_UTILS_AUTOINITREMARK_H
#ifndef LLVM_TRANSFORMS_UTILS_MEMORYOPREMARK_H
#define LLVM_TRANSFORMS_UTILS_MEMORYOPREMARK_H
#include "llvm/ADT/StringRef.h"
#include "llvm/Analysis/TargetLibraryInfo.h"
@ -22,6 +22,7 @@ namespace llvm {
class CallInst;
class DataLayout;
class DiagnosticInfoIROptimization;
class Instruction;
class IntrinsicInst;
class Value;
@ -31,36 +32,49 @@ class StoreInst;
// FIXME: Once we get to more remarks like this one, we need to re-evaluate how
// much of this logic should actually go into the remark emitter.
struct AutoInitRemark {
struct MemoryOpRemark {
OptimizationRemarkEmitter &ORE;
StringRef RemarkPass;
const DataLayout &DL;
const TargetLibraryInfo &TLI;
AutoInitRemark(OptimizationRemarkEmitter &ORE, StringRef RemarkPass,
MemoryOpRemark(OptimizationRemarkEmitter &ORE, StringRef RemarkPass,
const DataLayout &DL, const TargetLibraryInfo &TLI)
: ORE(ORE), RemarkPass(RemarkPass), DL(DL), TLI(TLI) {}
/// Emit a remark using information from the store's destination, size, etc.
void inspectStore(StoreInst &SI);
/// Emit a generic auto-init remark.
void inspectUnknown(Instruction &I);
/// Emit a remark using information from known intrinsic calls.
void inspectIntrinsicCall(IntrinsicInst &II);
/// Emit a remark using information from known function calls.
void inspectCall(CallInst &CI);
virtual ~MemoryOpRemark();
/// \return true iff the instruction is understood by MemoryOpRemark.
static bool canHandle(const Instruction *I, const TargetLibraryInfo &TLI);
void visit(const Instruction *I);
protected:
virtual std::string explainSource(StringRef Type);
enum RemarkKind { RK_Store, RK_Unknown, RK_IntrinsicCall, RK_Call };
virtual StringRef remarkName(RemarkKind RK);
private:
/// Emit a remark using information from the store's destination, size, etc.
void visitStore(const StoreInst &SI);
/// Emit a generic auto-init remark.
void visitUnknown(const Instruction &I);
/// Emit a remark using information from known intrinsic calls.
void visitIntrinsicCall(const IntrinsicInst &II);
/// Emit a remark using information from known function calls.
void visitCall(const CallInst &CI);
/// Add callee information to a remark: whether it's known, the function name,
/// etc.
template <typename FTy>
void inspectCallee(FTy F, bool KnownLibCall, OptimizationRemarkMissed &R);
void visitCallee(FTy F, bool KnownLibCall, OptimizationRemarkMissed &R);
/// Add operand information to a remark based on knowledge we have for known
/// libcalls.
void inspectKnownLibCall(CallInst &CI, LibFunc LF,
OptimizationRemarkMissed &R);
void visitKnownLibCall(const CallInst &CI, LibFunc LF,
OptimizationRemarkMissed &R);
/// Add the memory operation size to a remark.
void inspectSizeOperand(Value *V, OptimizationRemarkMissed &R);
void visitSizeOperand(Value *V, OptimizationRemarkMissed &R);
struct VariableInfo {
Optional<StringRef> Name;
@ -70,8 +84,22 @@ private:
/// Gather more information about \p V as a variable. This can be debug info,
/// information from the alloca, etc. Since \p V can represent more than a
/// single variable, they will all be added to the remark.
void inspectDst(Value *Dst, OptimizationRemarkMissed &R);
void inspectVariable(const Value *V, SmallVectorImpl<VariableInfo> &Result);
void visitPtr(Value *V, bool IsSrc, OptimizationRemarkMissed &R);
void visitVariable(const Value *V, SmallVectorImpl<VariableInfo> &Result);
};
/// Special case for -ftrivial-auto-var-init remarks.
struct AutoInitRemark : public MemoryOpRemark {
AutoInitRemark(OptimizationRemarkEmitter &ORE, StringRef RemarkPass,
const DataLayout &DL, const TargetLibraryInfo &TLI)
: MemoryOpRemark(ORE, RemarkPass, DL, TLI) {}
/// \return true iff the instruction is understood by AutoInitRemark.
static bool canHandle(const Instruction *I);
protected:
virtual std::string explainSource(StringRef Type) override;
virtual StringRef remarkName(RemarkKind RK) override;
};
} // namespace llvm

21
llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
View File

@ -72,6 +72,7 @@
#include "llvm/Support/raw_ostream.h"
#include "llvm/Target/TargetIntrinsicInfo.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Transforms/Utils/MemoryOpRemark.h"
#include <algorithm>
#include <cassert>
#include <cstddef>
@ -97,6 +98,7 @@ INITIALIZE_PASS_DEPENDENCY(TargetPassConfig)
INITIALIZE_PASS_DEPENDENCY(GISelCSEAnalysisWrapperPass)
INITIALIZE_PASS_DEPENDENCY(BlockFrequencyInfoWrapperPass)
INITIALIZE_PASS_DEPENDENCY(StackProtector)
INITIALIZE_PASS_DEPENDENCY(TargetLibraryInfoWrapperPass)
INITIALIZE_PASS_END(IRTranslator, DEBUG_TYPE, "IRTranslator LLVM IR -> MI",
false, false)
@ -164,6 +166,8 @@ void IRTranslator::getAnalysisUsage(AnalysisUsage &AU) const {
AU.addRequired<GISelCSEAnalysisWrapperPass>();
if (OptLevel != CodeGenOpt::None)
AU.addRequired<BranchProbabilityInfoWrapperPass>();
AU.addRequired<TargetLibraryInfoWrapperPass>();
AU.addPreserved<TargetLibraryInfoWrapperPass>();
getSelectionDAGFallbackAnalysisUsage(AU);
MachineFunctionPass::getAnalysisUsage(AU);
}
@ -1815,6 +1819,14 @@ bool IRTranslator::translateConstrainedFPIntrinsic(
bool IRTranslator::translateKnownIntrinsic(const CallInst &CI, Intrinsic::ID ID,
MachineIRBuilder &MIRBuilder) {
if (auto *MI = dyn_cast<AnyMemIntrinsic>(&CI)) {
const Function &F = *MI->getParent()->getParent();
auto &TLI = getAnalysis<TargetLibraryInfoWrapperPass>().getTLI(F);
if (MemoryOpRemark::canHandle(MI, TLI)) {
MemoryOpRemark R(*ORE, "memsize", *DL, TLI);
R.visit(MI);
}
}
// If this is a simple intrinsic (that is, we just need to add a def of
// a vreg, and uses for each arg operand, then translate it.
@ -2244,6 +2256,15 @@ bool IRTranslator::translateCallBase(const CallBase &CB,
Args.push_back(getOrCreateVRegs(*Arg));
}
if (auto *CI = dyn_cast<CallInst>(&CB)) {
const Function &F = *CI->getParent()->getParent();
auto &TLI = getAnalysis<TargetLibraryInfoWrapperPass>().getTLI(F);
if (MemoryOpRemark::canHandle(CI, TLI)) {
MemoryOpRemark R(*ORE, "memsize", *DL, TLI);
R.visit(CI);
}
}
// We don't set HasCalls on MFI here yet because call lowering may decide to
// optimize into tail calls. Instead, we defer that to selection where a final
// scan is done to check if any instructions are calls.

44
llvm/lib/Transforms/Scalar/AnnotationRemarks.cpp
View File

@ -22,7 +22,7 @@
#include "llvm/Pass.h"
#include "llvm/Support/Debug.h"
#include "llvm/Transforms/Scalar.h"
#include "llvm/Transforms/Utils/AutoInitRemark.h"
#include "llvm/Transforms/Utils/MemoryOpRemark.h"
using namespace llvm;
using namespace llvm::ore;
@ -35,45 +35,13 @@ static void tryEmitAutoInitRemark(ArrayRef<Instruction *> Instructions,
const TargetLibraryInfo &TLI) {
// For every auto-init annotation generate a separate remark.
for (Instruction *I : Instructions) {
if (!I->hasMetadata(LLVMContext::MD_annotation))
if (!AutoInitRemark::canHandle(I))
continue;
for (const MDOperand &Op :
I->getMetadata(LLVMContext::MD_annotation)->operands()) {
if (cast<MDString>(Op.get())->getString() != "auto-init")
continue;
Function &F = *I->getParent()->getParent();
const DataLayout &DL = F.getParent()->getDataLayout();
AutoInitRemark Remark(ORE, REMARK_PASS, DL, TLI);
// For some of them, we can provide more information:
// For stores:
// * size
// * volatile / atomic
if (auto *SI = dyn_cast<StoreInst>(I)) {
Remark.inspectStore(*SI);
continue;
}
// For intrinsics:
// * user-friendly name
// * size
if (auto *II = dyn_cast<IntrinsicInst>(I)) {
Remark.inspectIntrinsicCall(*II);
continue;
}
// For calls:
// * known/unknown function (e.g. the compiler knows bzero, but it doesn't
// know my_bzero)
// * memory operation size
if (auto *CI = dyn_cast<CallInst>(I)) {
Remark.inspectCall(*CI);
continue;
}
Remark.inspectUnknown(*I);
}
Function &F = *I->getParent()->getParent();
const DataLayout &DL = F.getParent()->getDataLayout();
AutoInitRemark Remark(ORE, REMARK_PASS, DL, TLI);
Remark.visit(I);
}
}

210
llvm/lib/Transforms/Utils/AutoInitRemark.cpp
View File

@ -1,210 +0,0 @@
//===-- AutoInitRemark.cpp - Auto-init remark analysis---------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// Implementation of the analysis for the "auto-init" remark.
//
//===----------------------------------------------------------------------===//
#include "llvm/Transforms/Utils/AutoInitRemark.h"
#include "llvm/Analysis/OptimizationRemarkEmitter.h"
#include "llvm/Analysis/ValueTracking.h"
#include "llvm/IR/DebugInfo.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/IntrinsicInst.h"
using namespace llvm;
using namespace llvm::ore;
static void volatileOrAtomicWithExtraArgs(bool Volatile, bool Atomic,
OptimizationRemarkMissed &R) {
if (Volatile)
R << " Volatile: " << NV("StoreVolatile", true) << ".";
if (Atomic)
R << " Atomic: " << NV("StoreAtomic", true) << ".";
// Emit StoreVolatile: false and StoreAtomic: false under ExtraArgs. This
// won't show them in the remark message but will end up in the serialized
// remarks.
if (!Volatile || !Atomic)
R << setExtraArgs();
if (!Volatile)
R << " Volatile: " << NV("StoreVolatile", false) << ".";
if (!Atomic)
R << " Atomic: " << NV("StoreAtomic", false) << ".";
}
static Optional<uint64_t> getSizeInBytes(Optional<uint64_t> SizeInBits) {
if (!SizeInBits || *SizeInBits % 8 != 0)
return None;
return *SizeInBits / 8;
}
void AutoInitRemark::inspectStore(StoreInst &SI) {
bool Volatile = SI.isVolatile();
bool Atomic = SI.isAtomic();
int64_t Size = DL.getTypeStoreSize(SI.getOperand(0)->getType());
OptimizationRemarkMissed R(RemarkPass.data(), "AutoInitStore", &SI);
R << "Store inserted by -ftrivial-auto-var-init.\nStore size: "
<< NV("StoreSize", Size) << " bytes.";
inspectDst(SI.getOperand(1), R);
volatileOrAtomicWithExtraArgs(Volatile, Atomic, R);
ORE.emit(R);
}
void AutoInitRemark::inspectUnknown(Instruction &I) {
ORE.emit(OptimizationRemarkMissed(RemarkPass.data(),
"AutoInitUnknownInstruction", &I)
<< "Initialization inserted by -ftrivial-auto-var-init.");
}
void AutoInitRemark::inspectIntrinsicCall(IntrinsicInst &II) {
SmallString<32> CallTo;
bool Atomic = false;
switch (II.getIntrinsicID()) {
case Intrinsic::memcpy:
CallTo = "memcpy";
break;
case Intrinsic::memmove:
CallTo = "memmove";
break;
case Intrinsic::memset:
CallTo = "memset";
break;
case Intrinsic::memcpy_element_unordered_atomic:
CallTo = "memcpy";
Atomic = true;
break;
case Intrinsic::memmove_element_unordered_atomic:
CallTo = "memmove";
Atomic = true;
break;
case Intrinsic::memset_element_unordered_atomic:
CallTo = "memset";
Atomic = true;
break;
default:
return inspectUnknown(II);
}
OptimizationRemarkMissed R(RemarkPass.data(), "AutoInitIntrinsic", &II);
inspectCallee(StringRef(CallTo), /*KnownLibCall=*/true, R);
inspectSizeOperand(II.getOperand(2), R);
auto *CIVolatile = dyn_cast<ConstantInt>(II.getOperand(3));
// No such thing as a memory intrinsic that is both atomic and volatile.
bool Volatile = !Atomic && CIVolatile && CIVolatile->getZExtValue();
inspectDst(II.getOperand(0), R);
volatileOrAtomicWithExtraArgs(Volatile, Atomic, R);
ORE.emit(R);
}
void AutoInitRemark::inspectCall(CallInst &CI) {
Function *F = CI.getCalledFunction();
if (!F)
return inspectUnknown(CI);
LibFunc LF;
bool KnownLibCall = TLI.getLibFunc(*F, LF) && TLI.has(LF);
OptimizationRemarkMissed R(RemarkPass.data(), "AutoInitCall", &CI);
inspectCallee(F, KnownLibCall, R);
inspectKnownLibCall(CI, LF, R);
ORE.emit(R);
}
template <typename FTy>
void AutoInitRemark::inspectCallee(FTy F, bool KnownLibCall,
OptimizationRemarkMissed &R) {
R << "Call to ";
if (!KnownLibCall)
R << NV("UnknownLibCall", "unknown") << " function ";
R << NV("Callee", F) << " inserted by -ftrivial-auto-var-init.";
}
void AutoInitRemark::inspectKnownLibCall(CallInst &CI, LibFunc LF,
OptimizationRemarkMissed &R) {
switch (LF) {
default:
return;
case LibFunc_bzero:
inspectSizeOperand(CI.getOperand(1), R);
inspectDst(CI.getOperand(0), R);
break;
}
}
void AutoInitRemark::inspectSizeOperand(Value *V, OptimizationRemarkMissed &R) {
if (auto *Len = dyn_cast<ConstantInt>(V)) {
uint64_t Size = Len->getZExtValue();
R << " Memory operation size: " << NV("StoreSize", Size) << " bytes.";
}
}
void AutoInitRemark::inspectVariable(const Value *V,
SmallVectorImpl<VariableInfo> &Result) {
// If we find some information in the debug info, take that.
bool FoundDI = false;
// Try to get an llvm.dbg.declare, which has a DILocalVariable giving us the
// real debug info name and size of the variable.
for (const DbgVariableIntrinsic *DVI :
FindDbgAddrUses(const_cast<Value *>(V))) {
if (DILocalVariable *DILV = DVI->getVariable()) {
Optional<uint64_t> DISize = getSizeInBytes(DILV->getSizeInBits());
VariableInfo Var{DILV->getName(), DISize};
if (!Var.isEmpty()) {
Result.push_back(std::move(Var));
FoundDI = true;
}
}
}
if (FoundDI) {
assert(!Result.empty());
return;
}
const auto *AI = dyn_cast<AllocaInst>(V);
if (!AI)
return;
// If not, get it from the alloca.
Optional<StringRef> Name = AI->hasName()
? Optional<StringRef>(AI->getName())
: Optional<StringRef>(None);
Optional<TypeSize> TySize = AI->getAllocationSizeInBits(DL);
Optional<uint64_t> Size =
TySize ? getSizeInBytes(TySize->getFixedSize()) : None;
VariableInfo Var{Name, Size};
if (!Var.isEmpty())
Result.push_back(std::move(Var));
}
void AutoInitRemark::inspectDst(Value *Dst, OptimizationRemarkMissed &R) {
// Find if Dst is a known variable we can give more information on.
SmallVector<const Value *, 2> Objects;
getUnderlyingObjects(Dst, Objects);
SmallVector<VariableInfo, 2> VIs;
for (const Value *V : Objects)
inspectVariable(V, VIs);
if (VIs.empty())
return;
R << "\nVariables: ";
for (unsigned i = 0; i < VIs.size(); ++i) {
const VariableInfo &VI = VIs[i];
assert(!VI.isEmpty() && "No extra content to display.");
if (i != 0)
R << ", ";
if (VI.Name)
R << NV("VarName", *VI.Name);
else
R << NV("VarName", "<unknown>");
if (VI.Size)
R << " (" << NV("VarSize", *VI.Size) << " bytes)";
}
R << ".";
}

2
llvm/lib/Transforms/Utils/CMakeLists.txt
View File

@ -3,7 +3,6 @@ add_llvm_component_library(LLVMTransformUtils
AMDGPUEmitPrintf.cpp
ASanStackFrameLayout.cpp
AssumeBundleBuilder.cpp
AutoInitRemark.cpp
BasicBlockUtils.cpp
BreakCriticalEdges.cpp
BuildLibCalls.cpp
@ -48,6 +47,7 @@ add_llvm_component_library(LLVMTransformUtils
LowerMemIntrinsics.cpp
LowerSwitch.cpp
MatrixUtils.cpp
MemoryOpRemark.cpp
Mem2Reg.cpp
MetaRenamer.cpp
ModuleUtils.cpp

381
llvm/lib/Transforms/Utils/MemoryOpRemark.cpp Normal file
View File

@ -0,0 +1,381 @@
//===-- MemoryOpRemark.cpp - Auto-init remark analysis---------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// Implementation of the analysis for the "auto-init" remark.
//
//===----------------------------------------------------------------------===//
#include "llvm/Transforms/Utils/MemoryOpRemark.h"
#include "llvm/Analysis/OptimizationRemarkEmitter.h"
#include "llvm/Analysis/ValueTracking.h"
#include "llvm/IR/DebugInfo.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/IntrinsicInst.h"
using namespace llvm;
using namespace llvm::ore;
MemoryOpRemark::~MemoryOpRemark() = default;
bool MemoryOpRemark::canHandle(const Instruction *I, const TargetLibraryInfo &TLI) {
if (isa<StoreInst>(I))
return true;
if (auto *II = dyn_cast<IntrinsicInst>(I)) {
switch (II->getIntrinsicID()) {
case Intrinsic::memcpy_inline:
case Intrinsic::memcpy:
case Intrinsic::memmove:
case Intrinsic::memset:
case Intrinsic::memcpy_element_unordered_atomic:
case Intrinsic::memmove_element_unordered_atomic:
case Intrinsic::memset_element_unordered_atomic:
return true;
default:
return false;
}
}
if (auto *CI = dyn_cast<CallInst>(I)) {
auto *CF = CI->getCalledFunction();
if (!CF)
return false;
if (!CF->hasName())
return false;
LibFunc LF;
bool KnownLibCall = TLI.getLibFunc(*CF, LF) && TLI.has(LF);
if (!KnownLibCall)
return false;
switch (LF) {
case LibFunc_memcpy_chk:
case LibFunc_mempcpy_chk:
case LibFunc_memset_chk:
case LibFunc_memmove_chk:
case LibFunc_memcpy:
case LibFunc_mempcpy:
case LibFunc_memset:
case LibFunc_memmove:
case LibFunc_bzero:
case LibFunc_bcopy:
return true;
default:
return false;
}
}
return false;
}
void MemoryOpRemark::visit(const Instruction *I) {
// For some of them, we can provide more information:
// For stores:
// * size
// * volatile / atomic
if (auto *SI = dyn_cast<StoreInst>(I)) {
visitStore(*SI);
return;
}
// For intrinsics:
// * user-friendly name
// * size
if (auto *II = dyn_cast<IntrinsicInst>(I)) {
visitIntrinsicCall(*II);
return;
}
// For calls:
// * known/unknown function (e.g. the compiler knows bzero, but it doesn't
// know my_bzero)
// * memory operation size
if (auto *CI = dyn_cast<CallInst>(I)) {
visitCall(*CI);
return;
}
visitUnknown(*I);
}
std::string MemoryOpRemark::explainSource(StringRef Type) {
return (Type + ".").str();
}
StringRef MemoryOpRemark::remarkName(RemarkKind RK) {
switch (RK) {
case RK_Store:
return "MemoryOpStore";
case RK_Unknown:
return "MemoryOpUnknown";
case RK_IntrinsicCall:
return "MemoryOpIntrinsicCall";
case RK_Call:
return "MemoryOpCall";
}
}
static void inlineVolatileOrAtomicWithExtraArgs(bool *Inline, bool Volatile,
bool Atomic,
OptimizationRemarkMissed &R) {
if (Inline && *Inline)
R << " Inlined: " << NV("StoreInlined", true) << ".";
if (Volatile)
R << " Volatile: " << NV("StoreVolatile", true) << ".";
if (Atomic)
R << " Atomic: " << NV("StoreAtomic", true) << ".";
// Emit the false cases under ExtraArgs. This won't show them in the remark
// message but will end up in the serialized remarks.
if ((Inline && !*Inline) || !Volatile || !Atomic)
R << setExtraArgs();
if (Inline && !*Inline)
R << " Inlined: " << NV("StoreInlined", false) << ".";
if (!Volatile)
R << " Volatile: " << NV("StoreVolatile", false) << ".";
if (!Atomic)
R << " Atomic: " << NV("StoreAtomic", false) << ".";
}
static Optional<uint64_t> getSizeInBytes(Optional<uint64_t> SizeInBits) {
if (!SizeInBits || *SizeInBits % 8 != 0)
return None;
return *SizeInBits / 8;
}
void MemoryOpRemark::visitStore(const StoreInst &SI) {
bool Volatile = SI.isVolatile();
bool Atomic = SI.isAtomic();
int64_t Size = DL.getTypeStoreSize(SI.getOperand(0)->getType());
OptimizationRemarkMissed R(RemarkPass.data(), remarkName(RK_Store), &SI);
R << explainSource("Store") << "\nStore size: " << NV("StoreSize", Size)
<< " bytes.";
visitPtr(SI.getOperand(1), /*IsRead=*/false, R);
inlineVolatileOrAtomicWithExtraArgs(nullptr, Volatile, Atomic, R);
ORE.emit(R);
}
void MemoryOpRemark::visitUnknown(const Instruction &I) {
OptimizationRemarkMissed R(RemarkPass.data(), remarkName(RK_Unknown), &I);
R << explainSource("Initialization");
ORE.emit(R);
}
void MemoryOpRemark::visitIntrinsicCall(const IntrinsicInst &II) {
SmallString<32> CallTo;
bool Atomic = false;
bool Inline = false;
switch (II.getIntrinsicID()) {
case Intrinsic::memcpy_inline:
CallTo = "memcpy";
Inline = true;
break;
case Intrinsic::memcpy:
CallTo = "memcpy";
break;
case Intrinsic::memmove:
CallTo = "memmove";
break;
case Intrinsic::memset:
CallTo = "memset";
break;
case Intrinsic::memcpy_element_unordered_atomic:
CallTo = "memcpy";
Atomic = true;
break;
case Intrinsic::memmove_element_unordered_atomic:
CallTo = "memmove";
Atomic = true;
break;
case Intrinsic::memset_element_unordered_atomic:
CallTo = "memset";
Atomic = true;
break;
default:
return visitUnknown(II);
}
OptimizationRemarkMissed R(RemarkPass.data(), remarkName(RK_IntrinsicCall),
&II);
visitCallee(StringRef(CallTo), /*KnownLibCall=*/true, R);
visitSizeOperand(II.getOperand(2), R);
auto *CIVolatile = dyn_cast<ConstantInt>(II.getOperand(3));
// No such thing as a memory intrinsic that is both atomic and volatile.
bool Volatile = !Atomic && CIVolatile && CIVolatile->getZExtValue();
switch (II.getIntrinsicID()) {
case Intrinsic::memcpy_inline:
case Intrinsic::memcpy:
case Intrinsic::memmove:
case Intrinsic::memcpy_element_unordered_atomic:
visitPtr(II.getOperand(1), /*IsRead=*/true, R);
visitPtr(II.getOperand(0), /*IsRead=*/false, R);
break;
case Intrinsic::memset:
case Intrinsic::memset_element_unordered_atomic:
visitPtr(II.getOperand(0), /*IsRead=*/false, R);
break;
}
inlineVolatileOrAtomicWithExtraArgs(&Inline, Volatile, Atomic, R);
ORE.emit(R);
}
void MemoryOpRemark::visitCall(const CallInst &CI) {
Function *F = CI.getCalledFunction();
if (!F)
return visitUnknown(CI);
LibFunc LF;
bool KnownLibCall = TLI.getLibFunc(*F, LF) && TLI.has(LF);
OptimizationRemarkMissed R(RemarkPass.data(), remarkName(RK_Call), &CI);
visitCallee(F, KnownLibCall, R);
visitKnownLibCall(CI, LF, R);
ORE.emit(R);
}
template <typename FTy>
void MemoryOpRemark::visitCallee(FTy F, bool KnownLibCall,
OptimizationRemarkMissed &R) {
R << "Call to ";
if (!KnownLibCall)
R << NV("UnknownLibCall", "unknown") << " function ";
R << NV("Callee", F) << explainSource("");
}
void MemoryOpRemark::visitKnownLibCall(const CallInst &CI, LibFunc LF,
OptimizationRemarkMissed &R) {
switch (LF) {
default:
return;
case LibFunc_memset_chk:
case LibFunc_memset:
visitSizeOperand(CI.getOperand(2), R);
visitPtr(CI.getOperand(0), /*IsRead=*/false, R);
break;
case LibFunc_bzero:
visitSizeOperand(CI.getOperand(1), R);
visitPtr(CI.getOperand(0), /*IsRead=*/false, R);
break;
case LibFunc_memcpy_chk:
case LibFunc_mempcpy_chk:
case LibFunc_memmove_chk:
case LibFunc_memcpy:
case LibFunc_mempcpy:
case LibFunc_memmove:
case LibFunc_bcopy:
visitSizeOperand(CI.getOperand(2), R);
visitPtr(CI.getOperand(1), /*IsRead=*/true, R);
visitPtr(CI.getOperand(0), /*IsRead=*/false, R);
break;
}
}
void MemoryOpRemark::visitSizeOperand(Value *V, OptimizationRemarkMissed &R) {
if (auto *Len = dyn_cast<ConstantInt>(V)) {
uint64_t Size = Len->getZExtValue();
R << " Memory operation size: " << NV("StoreSize", Size) << " bytes.";
}
}
void MemoryOpRemark::visitVariable(const Value *V,
SmallVectorImpl<VariableInfo> &Result) {
// If we find some information in the debug info, take that.
bool FoundDI = false;
// Try to get an llvm.dbg.declare, which has a DILocalVariable giving us the
// real debug info name and size of the variable.
for (const DbgVariableIntrinsic *DVI :
FindDbgAddrUses(const_cast<Value *>(V))) {
if (DILocalVariable *DILV = DVI->getVariable()) {
Optional<uint64_t> DISize = getSizeInBytes(DILV->getSizeInBits());
VariableInfo Var{DILV->getName(), DISize};
if (!Var.isEmpty()) {
Result.push_back(std::move(Var));
FoundDI = true;
}
}
}
if (FoundDI) {
assert(!Result.empty());
return;
}
const auto *AI = dyn_cast<AllocaInst>(V);
if (!AI)
return;
// If not, get it from the alloca.
Optional<StringRef> Name = AI->hasName() ? Optional<StringRef>(AI->getName())
: Optional<StringRef>(None);
Optional<TypeSize> TySize = AI->getAllocationSizeInBits(DL);
Optional<uint64_t> Size =
TySize ? getSizeInBytes(TySize->getFixedSize()) : None;
VariableInfo Var{Name, Size};
if (!Var.isEmpty())
Result.push_back(std::move(Var));
}
void MemoryOpRemark::visitPtr(Value *Ptr, bool IsRead, OptimizationRemarkMissed &R) {
// Find if Ptr is a known variable we can give more information on.
SmallVector<const Value *, 2> Objects;
getUnderlyingObjects(Ptr, Objects);
SmallVector<VariableInfo, 2> VIs;
for (const Value *V : Objects)
visitVariable(V, VIs);
if (VIs.empty()) {
bool CanBeNull;
bool CanBeFreed;
uint64_t Size = Ptr->getPointerDereferenceableBytes(DL, CanBeNull, CanBeFreed);
if (!Size)
return;
VIs.push_back({None, Size});
}
R << (IsRead ? "\nRead Variables: " : "\nWritten Variables: ");
for (unsigned i = 0; i < VIs.size(); ++i) {
const VariableInfo &VI = VIs[i];
assert(!VI.isEmpty() && "No extra content to display.");
if (i != 0)
R << ", ";
if (VI.Name)
R << NV(IsRead ? "RVarName" : "WVarName", *VI.Name);
else
R << NV(IsRead ? "RVarName" : "WVarName", "<unknown>");
if (VI.Size)
R << " (" << NV(IsRead ? "RVarSize" : "WVarSize", *VI.Size) << " bytes)";
}
R << ".";
}
bool AutoInitRemark::canHandle(const Instruction *I) {
if (!I->hasMetadata(LLVMContext::MD_annotation))
return false;
return any_of(I->getMetadata(LLVMContext::MD_annotation)->operands(),
[](const MDOperand &Op) {
return cast<MDString>(Op.get())->getString() == "auto-init";
});
}
std::string AutoInitRemark::explainSource(StringRef Type) {
return (Type + " inserted by -ftrivial-auto-var-init.").str();
}
StringRef AutoInitRemark::remarkName(RemarkKind RK) {
switch (RK) {
case RK_Store:
return "AutoInitStore";
case RK_Unknown:
return "AutoInitUnknownInstruction";
case RK_IntrinsicCall:
return "AutoInitIntrinsicCall";
case RK_Call:
return "AutoInitCall";
}
}

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llvm/test/CodeGen/AArch64/memsize-remarks.ll Normal file
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; RUN: llc %s -pass-remarks-missed=memsize -pass-remarks-output=%t.opt.yaml -pass-remarks-filter=memsize -global-isel -o /dev/null 2>&1 | FileCheck %s --check-prefix=GISEL --implicit-check-not=GISEL
; RUN: cat %t.opt.yaml | FileCheck -check-prefix=YAML %s
source_filename = "memsize.c"
target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
target triple = "arm64-apple-ios7.0.0"
declare i8* @__memmove_chk(i8*, i8*, i64, i64) #1
declare i8* @__memcpy_chk(i8*, i8*, i64, i64) #1
declare i8* @__memset_chk(i8*, i32, i64, i64) #1
declare i64 @llvm.objectsize.i64.p0i8(i8*, i1 immarg, i1 immarg, i1 immarg) #2
declare void @llvm.memset.p0i8.i64(i8* nocapture writeonly, i8, i64, i1 immarg) argmemonly nounwind willreturn writeonly
declare void @llvm.memmove.p0i8.p0i8.i64(i8* nocapture, i8* nocapture readonly, i64, i1 immarg) argmemonly nounwind willreturn
declare void @llvm.memcpy.p0i8.p0i8.i64(i8* noalias nocapture writeonly, i8* noalias nocapture readonly, i64, i1 immarg) argmemonly nounwind willreturn
declare void @bzero(i8* nocapture, i64) nofree nounwind
declare void @bcopy(i8* nocapture, i8* nocapture, i64) nofree nounwind
declare i8* @memset(i8*, i32, i64)
define void @memcpy_dynamic(i8* %d, i8* %s, i64 %l) #0 !dbg !14 {
entry:
%0 = call i64 @llvm.objectsize.i64.p0i8(i8* %d, i1 false, i1 true, i1 false), !dbg !16
; GISEL: remark: memsize.c:4:3: Call to memcpy.{{$}}
%call = call i8* @__memcpy_chk(i8* %d, i8* %s, i64 %l, i64 %0) #4, !dbg !17
ret void, !dbg !18
}
define void @memcpy_single(i8* %d, i8* %s, i64 %l) #0 !dbg !23 {
entry:
%0 = call i64 @llvm.objectsize.i64.p0i8(i8* %d, i1 false, i1 true, i1 false), !dbg !24
; GISEL: remark: memsize.c:10:3: Call to memcpy. Memory operation size: 1 bytes.
%call = call i8* @__memcpy_chk(i8* %d, i8* %s, i64 1, i64 %0) #4, !dbg !25
ret void, !dbg !26
}
define void @memcpy_intrinsic(i8* %d, i8* %s, i64 %l) #0 {
entry:
%0 = call i64 @llvm.objectsize.i64.p0i8(i8* %d, i1 false, i1 true, i1 false)
; GISEL: remark: <unknown>:0:0: Call to memcpy. Memory operation size: 1 bytes.
call void @llvm.memcpy.p0i8.p0i8.i64(i8* %d, i8* %s, i64 1, i1 false)
ret void
}
define void @memcpy_static(i8* %d, i8* %s, i64 %l) #0 !dbg !27 {
entry:
%0 = call i64 @llvm.objectsize.i64.p0i8(i8* %d, i1 false, i1 true, i1 false), !dbg !28
; GISEL: remark: memsize.c:13:3: Call to memcpy. Memory operation size: 100 bytes.
%call = call i8* @__memcpy_chk(i8* %d, i8* %s, i64 100, i64 %0) #4, !dbg !29
ret void, !dbg !30
}
define void @memcpy_huge(i8* %d, i8* %s, i64 %l) #0 !dbg !31 {
entry:
%0 = call i64 @llvm.objectsize.i64.p0i8(i8* %d, i1 false, i1 true, i1 false), !dbg !32
; GISEL: remark: memsize.c:16:3: Call to memcpy. Memory operation size: 100000 bytes.
%call = call i8* @__memcpy_chk(i8* %d, i8* %s, i64 100000, i64 %0) #4, !dbg !33
ret void, !dbg !34
}
define void @memmove_dynamic(i8* %d, i8* %s, i64 %l) #0 {
entry:
%0 = call i64 @llvm.objectsize.i64.p0i8(i8* %d, i1 false, i1 true, i1 false)
; GISEL: remark: <unknown>:0:0: Call to memmove.{{$}}
%call = call i8* @__memmove_chk(i8* %d, i8* %s, i64 %l, i64 %0) #4
ret void
}
define void @memmove_single(i8* %d, i8* %s, i64 %l) #0 {
entry:
%0 = call i64 @llvm.objectsize.i64.p0i8(i8* %d, i1 false, i1 true, i1 false)
; GISEL: remark: <unknown>:0:0: Call to memmove. Memory operation size: 1 bytes.
%call = call i8* @__memmove_chk(i8* %d, i8* %s, i64 1, i64 %0) #4
ret void
}
define void @memmove_static(i8* %d, i8* %s, i64 %l) #0 {
entry:
%0 = call i64 @llvm.objectsize.i64.p0i8(i8* %d, i1 false, i1 true, i1 false)
; GISEL: remark: <unknown>:0:0: Call to memmove. Memory operation size: 100 bytes.
%call = call i8* @__memmove_chk(i8* %d, i8* %s, i64 100, i64 %0) #4
ret void
}
define void @memmove_huge(i8* %d, i8* %s, i64 %l) #0 {
entry:
%0 = call i64 @llvm.objectsize.i64.p0i8(i8* %d, i1 false, i1 true, i1 false)
; GISEL: remark: <unknown>:0:0: Call to memmove. Memory operation size: 100000 bytes.
%call = call i8* @__memmove_chk(i8* %d, i8* %s, i64 100000, i64 %0) #4
ret void
}
define void @memset_dynamic(i8* %d, i64 %l) #0 !dbg !38 {
entry:
%0 = call i64 @llvm.objectsize.i64.p0i8(i8* %d, i1 false, i1 true, i1 false), !dbg !39
; GISEL: remark: memsize.c:22:3: Call to memset.{{$}}
%call = call i8* @__memset_chk(i8* %d, i32 0, i64 %l, i64 %0) #4, !dbg !40
ret void, !dbg !41
}
define void @memset_single(i8* %d, i64 %l) #0 !dbg !46 {
entry:
%0 = call i64 @llvm.objectsize.i64.p0i8(i8* %d, i1 false, i1 true, i1 false), !dbg !47
; GISEL: remark: memsize.c:28:3: Call to memset. Memory operation size: 1 bytes.
%call = call i8* @__memset_chk(i8* %d, i32 0, i64 1, i64 %0) #4, !dbg !48
ret void, !dbg !49
}
define void @memset_static(i8* %d, i64 %l) #0 !dbg !50 {
entry:
%0 = call i64 @llvm.objectsize.i64.p0i8(i8* %d, i1 false, i1 true, i1 false), !dbg !51
; GISEL: remark: memsize.c:31:3: Call to memset. Memory operation size: 100 bytes.
%call = call i8* @__memset_chk(i8* %d, i32 0, i64 100, i64 %0) #4, !dbg !52
ret void, !dbg !53
}
define void @memset_huge(i8* %d, i64 %l) #0 !dbg !54 {
entry:
%0 = call i64 @llvm.objectsize.i64.p0i8(i8* %d, i1 false, i1 true, i1 false), !dbg !55
; GISEL: remark: memsize.c:34:3: Call to memset. Memory operation size: 100000 bytes.
%call = call i8* @__memset_chk(i8* %d, i32 0, i64 100000, i64 %0) #4, !dbg !56
ret void, !dbg !57
}
define void @memset_empty(i8* %d, i64 %l) #0 !dbg !42 {
entry:
%0 = call i64 @llvm.objectsize.i64.p0i8(i8* %d, i1 false, i1 true, i1 false), !dbg !43
; GISEL: remark: memsize.c:25:3: Call to memset. Memory operation size: 0 bytes.
%call = call i8* @__memset_chk(i8* %d, i32 0, i64 0, i64 %0) #4, !dbg !44
ret void, !dbg !45
}
; YAML-LABEL: Function: memcpy_empty
define void @memcpy_empty(i8* %d, i8* %s, i64 %l) #0 !dbg !19 {
entry:
%0 = call i64 @llvm.objectsize.i64.p0i8(i8* %d, i1 false, i1 true, i1 false), !dbg !20
; GISEL: remark: memsize.c:7:3: Call to memcpy. Memory operation size: 0 bytes.
%call = call i8* @__memcpy_chk(i8* %d, i8* %s, i64 0, i64 %0) #4, !dbg !21
ret void, !dbg !22
}
; Emit remarks for memcpy, memmove, memset, bzero, bcopy with known constant
; sizes to an object of known size.
define void @known_call_with_dereferenceable_bytes(i8* dereferenceable(42) %dst, i8* dereferenceable(314) %src) {
; GISEL: Call to memset. Memory operation size: 1 bytes.
; GISEL-NOT: Read Variables:
; GISEL-NEXT: Written Variables: <unknown> (42 bytes).
; YAML: --- !Missed
; YAML: Pass: memsize
; YAML: Name: MemoryOpIntrinsicCall
; YAML-LABEL: Function: known_call_with_dereferenceable_bytes
; YAML-NEXT: Args:
; YAML-NEXT: - String: 'Call to '
; YAML-NEXT: - Callee: memset
; YAML-NEXT: - String: .
; YAML-NEXT: - String: ' Memory operation size: '
; YAML-NEXT: - StoreSize: '1'
; YAML-NEXT: - String: ' bytes.'
; YAML-NEXT: - String: "\nWritten Variables: "
; YAML-NEXT: - WVarName: '<unknown>'
; YAML-NEXT: - String: ' ('
; YAML-NEXT: - WVarSize: '42'
; YAML-NEXT: - String: ' bytes)'
; YAML-NEXT: - String: .
; YAML-NEXT: - String: ' Inlined: '
; YAML-NEXT: - StoreInlined: 'false'
; YAML-NEXT: - String: .
; YAML-NEXT: - String: ' Volatile: '
; YAML-NEXT: - StoreVolatile: 'false'
; YAML-NEXT: - String: .
; YAML-NEXT: - String: ' Atomic: '
; YAML-NEXT: - StoreAtomic: 'false'
; YAML-NEXT: - String: .
; YAML-NEXT: ...
call void @llvm.memset.p0i8.i64(i8* %dst, i8 0, i64 1, i1 false)
; GISEL: Call to memcpy. Memory operation size: 1 bytes.
; GISEL-NEXT: Read Variables: <unknown> (314 bytes).
; GISEL-NEXT: Written Variables: <unknown> (42 bytes).
; YAML: --- !Missed
; YAML: Pass: memsize
; YAML: Name: MemoryOpIntrinsicCall
; YAML-LABEL: Function: known_call_with_dereferenceable_bytes
; YAML-NEXT: Args:
; YAML-NEXT: - String: 'Call to '
; YAML-NEXT: - Callee: memcpy
; YAML-NEXT: - String: .
; YAML-NEXT: - String: ' Memory operation size: '
; YAML-NEXT: - StoreSize: '1'
; YAML-NEXT: - String: ' bytes.'
; YAML-NEXT: - String: "\nRead Variables: "
; YAML-NEXT: - RVarName: '<unknown>'
; YAML-NEXT: - String: ' ('
; YAML-NEXT: - RVarSize: '314'
; YAML-NEXT: - String: ' bytes)'
; YAML-NEXT: - String: .
; YAML-NEXT: - String: "\nWritten Variables: "
; YAML-NEXT: - WVarName: '<unknown>'
; YAML-NEXT: - String: ' ('
; YAML-NEXT: - WVarSize: '42'
; YAML-NEXT: - String: ' bytes)'
; YAML-NEXT: - String: .
; YAML-NEXT: - String: ' Inlined: '
; YAML-NEXT: - StoreInlined: 'false'
; YAML-NEXT: - String: .
; YAML-NEXT: - String: ' Volatile: '
; YAML-NEXT: - StoreVolatile: 'false'
; YAML-NEXT: - String: .
; YAML-NEXT: - String: ' Atomic: '
; YAML-NEXT: - StoreAtomic: 'false'
; YAML-NEXT: - String: .
; YAML-NEXT: ...
call void @llvm.memcpy.p0i8.p0i8.i64(i8* %dst, i8* %src, i64 1, i1 false)
; GISEL: Call to memmove. Memory operation size: 1 bytes.
; GISEL-NEXT: Read Variables: <unknown> (314 bytes).
; GISEL-NEXT: Written Variables: <unknown> (42 bytes).
; YAML: --- !Missed
; YAML: Pass: memsize
; YAML: Name: MemoryOpIntrinsicCall
; YAML-LABEL: Function: known_call_with_dereferenceable_bytes
; YAML-NEXT: Args:
; YAML-NEXT: - String: 'Call to '
; YAML-NEXT: - Callee: memmove
; YAML-NEXT: - String: .
; YAML-NEXT: - String: ' Memory operation size: '
; YAML-NEXT: - StoreSize: '1'
; YAML-NEXT: - String: ' bytes.'
; YAML-NEXT: - String: "\nRead Variables: "
; YAML-NEXT: - RVarName: '<unknown>'
; YAML-NEXT: - String: ' ('
; YAML-NEXT: - RVarSize: '314'
; YAML-NEXT: - String: ' bytes)'
; YAML-NEXT: - String: .
; YAML-NEXT: - String: "\nWritten Variables: "
; YAML-NEXT: - WVarName: '<unknown>'
; YAML-NEXT: - String: ' ('
; YAML-NEXT: - WVarSize: '42'
; YAML-NEXT: - String: ' bytes)'
; YAML-NEXT: - String: .
; YAML-NEXT: - String: ' Inlined: '
; YAML-NEXT: - StoreInlined: 'false'
; YAML-NEXT: - String: .
; YAML-NEXT: - String: ' Volatile: '
; YAML-NEXT: - StoreVolatile: 'false'
; YAML-NEXT: - String: .
; YAML-NEXT: - String: ' Atomic: '
; YAML-NEXT: - StoreAtomic: 'false'
; YAML-NEXT: - String: .
; YAML-NEXT: ...
call void @llvm.memmove.p0i8.p0i8.i64(i8* %dst, i8* %src, i64 1, i1 false)
; GISEL: Call to bzero. Memory operation size: 1 bytes.
; GISEL-NOT: Read Variables:
; GISEL-NEXT: Written Variables: <unknown> (42 bytes).
; YAML: --- !Missed
; YAML: Pass: memsize
; YAML: Name: MemoryOpCall
; YAML-LABEL: Function: known_call_with_dereferenceable_bytes
; YAML-NEXT: Args:
; YAML-NEXT: - String: 'Call to '
; YAML-NEXT: - Callee: bzero
; YAML-NEXT: - String: .
; YAML-NEXT: - String: ' Memory operation size: '
; YAML-NEXT: - StoreSize: '1'
; YAML-NEXT: - String: ' bytes.'
; YAML-NEXT: - String: "\nWritten Variables: "
; YAML-NEXT: - WVarName: '<unknown>'
; YAML-NEXT: - String: ' ('
; YAML-NEXT: - WVarSize: '42'
; YAML-NEXT: - String: ' bytes)'
; YAML-NEXT: - String: .
; YAML-NEXT: ...
call void @bzero(i8* %dst, i64 1)
; GISEL: Call to bcopy. Memory operation size: 1 bytes.
; GISEL-NEXT: Read Variables: <unknown> (314 bytes).
; GISEL-NEXT: Written Variables: <unknown> (42 bytes).
; YAML: --- !Missed
; YAML: Pass: memsize
; YAML: Name: MemoryOpCall
; YAML-LABEL: Function: known_call_with_dereferenceable_bytes
; YAML-NEXT: Args:
; YAML-NEXT: - String: 'Call to '
; YAML-NEXT: - Callee: bcopy
; YAML-NEXT: - String: .
; YAML-NEXT: - String: ' Memory operation size: '
; YAML-NEXT: - StoreSize: '1'
; YAML-NEXT: - String: ' bytes.'
; YAML-NEXT: - String: "\nRead Variables: "
; YAML-NEXT: - RVarName: '<unknown>'
; YAML-NEXT: - String: ' ('
; YAML-NEXT: - RVarSize: '314'
; YAML-NEXT: - String: ' bytes)'
; YAML-NEXT: - String: .
; YAML-NEXT: - String: "\nWritten Variables: "
; YAML-NEXT: - WVarName: '<unknown>'
; YAML-NEXT: - String: ' ('
; YAML-NEXT: - WVarSize: '42'
; YAML-NEXT: - String: ' bytes)'
; YAML-NEXT: - String: .
; YAML-NEXT: ...
call void @bcopy(i8* %dst, i8* %src, i64 1)
ret void
}
attributes #0 = { noinline nounwind ssp uwtable "frame-pointer"="non-leaf" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="apple-a7" "target-features"="+aes,+crypto,+fp-armv8,+neon,+sha2,+zcm,+zcz" }
attributes #1 = { nounwind "frame-pointer"="non-leaf" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="apple-a7" "target-features"="+aes,+crypto,+fp-armv8,+neon,+sha2,+zcm,+zcz" }
attributes #2 = { nofree nosync nounwind readnone speculatable willreturn }
attributes #3 = { argmemonly nofree nosync nounwind willreturn }
attributes #4 = { nounwind }
!llvm.module.flags = !{!0, !1, !2, !3, !4, !5, !6, !7, !8, !9}
!llvm.dbg.cu = !{!10}
!llvm.ident = !{!13}
!0 = !{i32 2, !"SDK Version", [2 x i32] [i32 12, i32 0]}
!1 = !{i32 2, !"Debug Info Version", i32 3}
!2 = !{i32 1, !"wchar_size", i32 4}
!3 = !{i32 1, !"branch-target-enforcement", i32 0}
!4 = !{i32 1, !"sign-return-address", i32 0}
!5 = !{i32 1, !"sign-return-address-all", i32 0}
!6 = !{i32 1, !"sign-return-address-with-bkey", i32 0}
!7 = !{i32 7, !"PIC Level", i32 2}
!8 = !{i32 7, !"uwtable", i32 1}
!9 = !{i32 7, !"frame-pointer", i32 1}
!10 = distinct !DICompileUnit(language: DW_LANG_C99, file: !11, producer: "clang", isOptimized: false, runtimeVersion: 0, emissionKind: NoDebug, enums: !12, splitDebugInlining: false, nameTableKind: None, sysroot: "/")
!11 = !DIFile(filename: "memsize.c", directory: "")
!12 = !{}
!13 = !{!"clang"}
!14 = distinct !DISubprogram(name: "memcpy_dynamic", scope: !11, file: !11, line: 3, type: !15, scopeLine: 3, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !10, retainedNodes: !12)
!15 = !DISubroutineType(types: !12)
!16 = !DILocation(line: 4, column: 36, scope: !14)
!17 = !DILocation(line: 4, column: 3, scope: !14)
!18 = !DILocation(line: 5, column: 1, scope: !14)
!19 = distinct !DISubprogram(name: "memcpy_empty", scope: !11, file: !11, line: 6, type: !15, scopeLine: 6, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !10, retainedNodes: !12)
!20 = !DILocation(line: 7, column: 36, scope: !19)
!21 = !DILocation(line: 7, column: 3, scope: !19)
!22 = !DILocation(line: 8, column: 1, scope: !19)
!23 = distinct !DISubprogram(name: "memcpy_single", scope: !11, file: !11, line: 9, type: !15, scopeLine: 9, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !10, retainedNodes: !12)
!24 = !DILocation(line: 10, column: 36, scope: !23)
!25 = !DILocation(line: 10, column: 3, scope: !23)
!26 = !DILocation(line: 11, column: 1, scope: !23)
!27 = distinct !DISubprogram(name: "memcpy_static", scope: !11, file: !11, line: 12, type: !15, scopeLine: 12, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !10, retainedNodes: !12)
!28 = !DILocation(line: 13, column: 38, scope: !27)
!29 = !DILocation(line: 13, column: 3, scope: !27)
!30 = !DILocation(line: 14, column: 1, scope: !27)
!31 = distinct !DISubprogram(name: "memcpy_huge", scope: !11, file: !11, line: 15, type: !15, scopeLine: 15, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !10, retainedNodes: !12)
!32 = !DILocation(line: 16, column: 41, scope: !31)
!33 = !DILocation(line: 16, column: 3, scope: !31)
!34 = !DILocation(line: 17, column: 1, scope: !31)
!35 = distinct !DISubprogram(name: "memcpy_inline", scope: !11, file: !11, line: 18, type: !15, scopeLine: 18, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !10, retainedNodes: !12)
!36 = !DILocation(line: 19, column: 3, scope: !35)
!37 = !DILocation(line: 20, column: 1, scope: !35)
!38 = distinct !DISubprogram(name: "memset_dynamic", scope: !11, file: !11, line: 21, type: !15, scopeLine: 21, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !10, retainedNodes: !12)
!39 = !DILocation(line: 22, column: 36, scope: !38)
!40 = !DILocation(line: 22, column: 3, scope: !38)
!41 = !DILocation(line: 23, column: 1, scope: !38)
!42 = distinct !DISubprogram(name: "memset_empty", scope: !11, file: !11, line: 24, type: !15, scopeLine: 24, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !10, retainedNodes: !12)
!43 = !DILocation(line: 25, column: 36, scope: !42)
!44 = !DILocation(line: 25, column: 3, scope: !42)
!45 = !DILocation(line: 26, column: 1, scope: !42)
!46 = distinct !DISubprogram(name: "memset_single", scope: !11, file: !11, line: 27, type: !15, scopeLine: 27, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !10, retainedNodes: !12)
!47 = !DILocation(line: 28, column: 36, scope: !46)
!48 = !DILocation(line: 28, column: 3, scope: !46)
!49 = !DILocation(line: 29, column: 1, scope: !46)
!50 = distinct !DISubprogram(name: "memset_static", scope: !11, file: !11, line: 30, type: !15, scopeLine: 30, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !10, retainedNodes: !12)
!51 = !DILocation(line: 31, column: 38, scope: !50)
!52 = !DILocation(line: 31, column: 3, scope: !50)
!53 = !DILocation(line: 32, column: 1, scope: !50)
!54 = distinct !DISubprogram(name: "memset_huge", scope: !11, file: !11, line: 33, type: !15, scopeLine: 33, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !10, retainedNodes: !12)
!55 = !DILocation(line: 34, column: 41, scope: !54)
!56 = !DILocation(line: 34, column: 3, scope: !54)
!57 = !DILocation(line: 35, column: 1, scope: !54)
!58 = distinct !DISubprogram(name: "auto_init", scope: !11, file: !11, line: 37, type: !15, scopeLine: 37, spFlags: DISPFlagDefinition, unit: !10, retainedNodes: !12)

72
llvm/test/Transforms/Util/trivial-auto-var-init-call.ll
View File

@ -13,6 +13,9 @@ define void @known_call(i8* %src, i8* %dst, i64 %size) {
; YAML-NEXT: - String: 'Call to '
; YAML-NEXT: - Callee: memset
; YAML-NEXT: - String: ' inserted by -ftrivial-auto-var-init.'
; YAML-NEXT: - String: ' Inlined: '
; YAML-NEXT: - StoreInlined: 'false'
; YAML-NEXT: - String: .
; YAML-NEXT: - String: ' Volatile: '
; YAML-NEXT: - StoreVolatile: 'false'
; YAML-NEXT: - String: .
@ -31,6 +34,9 @@ define void @known_call(i8* %src, i8* %dst, i64 %size) {
; YAML-NEXT: - String: 'Call to '
; YAML-NEXT: - Callee: memcpy
; YAML-NEXT: - String: ' inserted by -ftrivial-auto-var-init.'
; YAML-NEXT: - String: ' Inlined: '
; YAML-NEXT: - StoreInlined: 'false'
; YAML-NEXT: - String: .
; YAML-NEXT: - String: ' Volatile: '
; YAML-NEXT: - StoreVolatile: 'false'
; YAML-NEXT: - String: .
@ -49,6 +55,9 @@ define void @known_call(i8* %src, i8* %dst, i64 %size) {
; YAML-NEXT: - String: 'Call to '
; YAML-NEXT: - Callee: memmove
; YAML-NEXT: - String: ' inserted by -ftrivial-auto-var-init.'
; YAML-NEXT: - String: ' Inlined: '
; YAML-NEXT: - StoreInlined: 'false'
; YAML-NEXT: - String: .
; YAML-NEXT: - String: ' Volatile: '
; YAML-NEXT: - StoreVolatile: 'false'
; YAML-NEXT: - String: .
@ -79,6 +88,9 @@ define void @known_call(i8* %src, i8* %dst, i64 %size) {
; YAML-NEXT: - String: 'Call to '
; YAML-NEXT: - Callee: memset
; YAML-NEXT: - String: ' inserted by -ftrivial-auto-var-init.'
; YAML-NEXT: - String: ' Memory operation size: '
; YAML-NEXT: - StoreSize: '32'
; YAML-NEXT: - String: ' bytes.'
; YAML-NEXT: ...
call i8* @memset(i8* %dst, i32 0, i64 32), !annotation !0, !dbg !DILocation(scope: !4)
ret void
@ -99,6 +111,9 @@ define void @known_call_with_size(i8* %src, i8* %dst) {
; YAML-NEXT: - String: ' Memory operation size: '
; YAML-NEXT: - StoreSize: '32'
; YAML-NEXT: - String: ' bytes.'
; YAML-NEXT: - String: ' Inlined: '
; YAML-NEXT: - StoreInlined: 'false'
; YAML-NEXT: - String: .
; YAML-NEXT: - String: ' Volatile: '
; YAML-NEXT: - StoreVolatile: 'false'
; YAML-NEXT: - String: .
@ -120,6 +135,9 @@ define void @known_call_with_size(i8* %src, i8* %dst) {
; YAML-NEXT: - String: ' Memory operation size: '
; YAML-NEXT: - StoreSize: '32'
; YAML-NEXT: - String: ' bytes.'
; YAML-NEXT: - String: ' Inlined: '
; YAML-NEXT: - StoreInlined: 'false'
; YAML-NEXT: - String: .
; YAML-NEXT: - String: ' Volatile: '
; YAML-NEXT: - StoreVolatile: 'false'
; YAML-NEXT: - String: .
@ -141,6 +159,9 @@ define void @known_call_with_size(i8* %src, i8* %dst) {
; YAML-NEXT: - String: ' Memory operation size: '
; YAML-NEXT: - StoreSize: '32'
; YAML-NEXT: - String: ' bytes.'
; YAML-NEXT: - String: ' Inlined: '
; YAML-NEXT: - StoreInlined: 'false'
; YAML-NEXT: - String: .
; YAML-NEXT: - String: ' Volatile: '
; YAML-NEXT: - StoreVolatile: 'false'
; YAML-NEXT: - String: .
@ -183,6 +204,9 @@ define void @known_call_volatile(i8* %src, i8* %dst, i64 %size) {
; YAML-NEXT: - String: ' Volatile: '
; YAML-NEXT: - StoreVolatile: 'true'
; YAML-NEXT: - String: .
; YAML-NEXT: - String: ' Inlined: '
; YAML-NEXT: - StoreInlined: 'false'
; YAML-NEXT: - String: .
; YAML-NEXT: - String: ' Atomic: '
; YAML-NEXT: - StoreAtomic: 'false'
; YAML-NEXT: - String: .
@ -201,6 +225,9 @@ define void @known_call_volatile(i8* %src, i8* %dst, i64 %size) {
; YAML-NEXT: - String: ' Volatile: '
; YAML-NEXT: - StoreVolatile: 'true'
; YAML-NEXT: - String: .
; YAML-NEXT: - String: ' Inlined: '
; YAML-NEXT: - StoreInlined: 'false'
; YAML-NEXT: - String: .
; YAML-NEXT: - String: ' Atomic: '
; YAML-NEXT: - StoreAtomic: 'false'
; YAML-NEXT: - String: .
@ -219,6 +246,9 @@ define void @known_call_volatile(i8* %src, i8* %dst, i64 %size) {
; YAML-NEXT: - String: ' Volatile: '
; YAML-NEXT: - StoreVolatile: 'true'
; YAML-NEXT: - String: .
; YAML-NEXT: - String: ' Inlined: '
; YAML-NEXT: - StoreInlined: 'false'
; YAML-NEXT: - String: .
; YAML-NEXT: - String: ' Atomic: '
; YAML-NEXT: - StoreAtomic: 'false'
; YAML-NEXT: - String: .
@ -242,6 +272,9 @@ define void @known_call_atomic(i8* %src, i8* %dst, i64 %size) {
; YAML-NEXT: - String: ' Atomic: '
; YAML-NEXT: - StoreAtomic: 'true'
; YAML-NEXT: - String: .
; YAML-NEXT: - String: ' Inlined: '
; YAML-NEXT: - StoreInlined: 'false'
; YAML-NEXT: - String: .
; YAML-NEXT: - String: ' Volatile: '
; YAML-NEXT: - StoreVolatile: 'false'
; YAML-NEXT: - String: .
@ -260,6 +293,9 @@ define void @known_call_atomic(i8* %src, i8* %dst, i64 %size) {
; YAML-NEXT: - String: ' Atomic: '
; YAML-NEXT: - StoreAtomic: 'true'
; YAML-NEXT: - String: .
; YAML-NEXT: - String: ' Inlined: '
; YAML-NEXT: - StoreInlined: 'false'
; YAML-NEXT: - String: .
; YAML-NEXT: - String: ' Volatile: '
; YAML-NEXT: - StoreVolatile: 'false'
; YAML-NEXT: - String: .
@ -278,6 +314,9 @@ define void @known_call_atomic(i8* %src, i8* %dst, i64 %size) {
; YAML-NEXT: - String: ' Atomic: '
; YAML-NEXT: - StoreAtomic: 'true'
; YAML-NEXT: - String: .
; YAML-NEXT: - String: ' Inlined: '
; YAML-NEXT: - StoreInlined: 'false'
; YAML-NEXT: - String: .
; YAML-NEXT: - String: ' Volatile: '
; YAML-NEXT: - StoreVolatile: 'false'
; YAML-NEXT: - String: .
@ -303,12 +342,15 @@ define void @known_call_with_size_alloca(i8* %src) {
; YAML-NEXT: - String: ' Memory operation size: '
; YAML-NEXT: - StoreSize: '1'
; YAML-NEXT: - String: ' bytes.'
; YAML-NEXT: - String: "\nVariables: "
; YAML-NEXT: - VarName: dst
; YAML-NEXT: - String: "\nWritten Variables: "
; YAML-NEXT: - WVarName: dst
; YAML-NEXT: - String: ' ('
; YAML-NEXT: - VarSize: '1'
; YAML-NEXT: - WVarSize: '1'
; YAML-NEXT: - String: ' bytes)'
; YAML-NEXT: - String: .
; YAML-NEXT: - String: ' Inlined: '
; YAML-NEXT: - StoreInlined: 'false'
; YAML-NEXT: - String: .
; YAML-NEXT: - String: ' Volatile: '
; YAML-NEXT: - StoreVolatile: 'false'
; YAML-NEXT: - String: .
@ -332,12 +374,15 @@ define void @known_call_with_size_alloca(i8* %src) {
; YAML-NEXT: - String: ' Memory operation size: '
; YAML-NEXT: - StoreSize: '1'
; YAML-NEXT: - String: ' bytes.'
; YAML-NEXT: - String: "\nVariables: "
; YAML-NEXT: - VarName: dst
; YAML-NEXT: - String: "\nWritten Variables: "
; YAML-NEXT: - WVarName: dst
; YAML-NEXT: - String: ' ('
; YAML-NEXT: - VarSize: '1'
; YAML-NEXT: - WVarSize: '1'
; YAML-NEXT: - String: ' bytes)'
; YAML-NEXT: - String: .
; YAML-NEXT: - String: ' Inlined: '
; YAML-NEXT: - StoreInlined: 'false'
; YAML-NEXT: - String: .
; YAML-NEXT: - String: ' Volatile: '
; YAML-NEXT: - StoreVolatile: 'false'
; YAML-NEXT: - String: .
@ -360,12 +405,15 @@ define void @known_call_with_size_alloca(i8* %src) {
; YAML-NEXT: - String: ' Memory operation size: '
; YAML-NEXT: - StoreSize: '1'
; YAML-NEXT: - String: ' bytes.'
; YAML-NEXT: - String: "\nVariables: "
; YAML-NEXT: - VarName: dst
; YAML-NEXT: - String: "\nWritten Variables: "
; YAML-NEXT: - WVarName: dst
; YAML-NEXT: - String: ' ('
; YAML-NEXT: - VarSize: '1'
; YAML-NEXT: - WVarSize: '1'
; YAML-NEXT: - String: ' bytes)'
; YAML-NEXT: - String: .
; YAML-NEXT: - String: ' Inlined: '
; YAML-NEXT: - StoreInlined: 'false'
; YAML-NEXT: - String: .
; YAML-NEXT: - String: ' Volatile: '
; YAML-NEXT: - StoreVolatile: 'false'
; YAML-NEXT: - String: .
@ -388,10 +436,10 @@ define void @known_call_with_size_alloca(i8* %src) {
; YAML-NEXT: - String: ' Memory operation size: '
; YAML-NEXT: - StoreSize: '1'
; YAML-NEXT: - String: ' bytes.'
; YAML-NEXT: - String: "\nVariables: "
; YAML-NEXT: - VarName: dst
; YAML-NEXT: - String: "\nWritten Variables: "
; YAML-NEXT: - WVarName: dst
; YAML-NEXT: - String: ' ('
; YAML-NEXT: - VarSize: '1'
; YAML-NEXT: - WVarSize: '1'
; YAML-NEXT: - String: ' bytes)'
; YAML-NEXT: - String: .
; YAML-NEXT: ...

18
llvm/test/Transforms/Util/trivial-auto-var-init-store.ll
View File

@ -11,7 +11,8 @@ define void @store(i32* %dst) {
; YAML-NEXT: DebugLoc:
; YAML-NEXT: Function: store
; YAML-NEXT: Args:
; YAML-NEXT: - String: "Store inserted by -ftrivial-auto-var-init.\nStore size: "
; YAML-NEXT: - String: Store inserted by -ftrivial-auto-var-init.
; YAML-NEXT: - String: "\nStore size: "
; YAML-NEXT: - StoreSize: '4'
; YAML-NEXT: - String: ' bytes.'
; YAML-NEXT: - String: ' Volatile: '
@ -35,7 +36,8 @@ define void @volatile_store(i32* %dst) {
; YAML-NEXT: DebugLoc:
; YAML-NEXT: Function: volatile_store
; YAML-NEXT: Args:
; YAML-NEXT: - String: "Store inserted by -ftrivial-auto-var-init.\nStore size: "
; YAML-NEXT: - String: Store inserted by -ftrivial-auto-var-init.
; YAML-NEXT: - String: "\nStore size: "
; YAML-NEXT: - StoreSize: '4'
; YAML-NEXT: - String: ' bytes.'
; YAML-NEXT: - String: ' Volatile: '
@ -59,7 +61,8 @@ define void @atomic_store(i32* %dst) {
; YAML-NEXT: DebugLoc:
; YAML-NEXT: Function: atomic_store
; YAML-NEXT: Args:
; YAML-NEXT: - String: "Store inserted by -ftrivial-auto-var-init.\nStore size: "
; YAML-NEXT: - String: Store inserted by -ftrivial-auto-var-init.
; YAML-NEXT: - String: "\nStore size: "
; YAML-NEXT: - StoreSize: '4'
; YAML-NEXT: - String: ' bytes.'
; YAML-NEXT: - String: ' Atomic: '
@ -84,13 +87,14 @@ define void @store_alloca() {
; YAML-NEXT: DebugLoc:
; YAML-NEXT: Function: store_alloca
; YAML-NEXT: Args:
; YAML-NEXT: - String: "Store inserted by -ftrivial-auto-var-init.\nStore size: "
; YAML-NEXT: - String: Store inserted by -ftrivial-auto-var-init.
; YAML-NEXT: - String: "\nStore size: "
; YAML-NEXT: - StoreSize: '4'
; YAML-NEXT: - String: ' bytes.'
; YAML-NEXT: - String: "\nVariables: "
; YAML-NEXT: - VarName: dst
; YAML-NEXT: - String: "\nWritten Variables: "
; YAML-NEXT: - WVarName: dst
; YAML-NEXT: - String: ' ('
; YAML-NEXT: - VarSize: '4'
; YAML-NEXT: - WVarSize: '4'
; YAML-NEXT: - String: ' bytes)'
; YAML-NEXT: - String: .
; YAML-NEXT: - String: ' Volatile: '