//===----------------------------------------------------------------------===//
#include "llvm/Transforms/Utils/SimplifyLibCalls.h"
-#include "llvm/DataLayout.h"
+#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringMap.h"
+#include "llvm/ADT/Triple.h"
#include "llvm/Analysis/ValueTracking.h"
-#include "llvm/Function.h"
-#include "llvm/IRBuilder.h"
-#include "llvm/Intrinsics.h"
-#include "llvm/Module.h"
-#include "llvm/LLVMContext.h"
+#include "llvm/IR/DataLayout.h"
+#include "llvm/IR/Function.h"
+#include "llvm/IR/IRBuilder.h"
+#include "llvm/IR/IntrinsicInst.h"
+#include "llvm/IR/Intrinsics.h"
+#include "llvm/IR/LLVMContext.h"
+#include "llvm/IR/Module.h"
+#include "llvm/Support/Allocator.h"
+#include "llvm/Support/CommandLine.h"
#include "llvm/Target/TargetLibraryInfo.h"
#include "llvm/Transforms/Utils/BuildLibCalls.h"
using namespace llvm;
+static cl::opt<bool>
+ColdErrorCalls("error-reporting-is-cold", cl::init(true),
+ cl::Hidden, cl::desc("Treat error-reporting calls as cold"));
+
/// This class is the abstract base class for the set of optimizations that
/// corresponds to one library call.
namespace {
virtual Value *callOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B)
=0;
+ /// ignoreCallingConv - Returns false if this transformation could possibly
+ /// change the calling convention.
+ virtual bool ignoreCallingConv() { return false; }
+
Value *optimizeCall(CallInst *CI, const DataLayout *TD,
const TargetLibraryInfo *TLI,
const LibCallSimplifier *LCS, IRBuilder<> &B) {
Context = &CI->getCalledFunction()->getContext();
// We never change the calling convention.
- if (CI->getCallingConv() != llvm::CallingConv::C)
+ if (!ignoreCallingConv() && CI->getCallingConv() != llvm::CallingConv::C)
return NULL;
return callOptimizer(CI->getCalledFunction(), CI, B);
return false;
}
+/// \brief Check whether the overloaded unary floating point function
+/// corresponing to \a Ty is available.
+static bool hasUnaryFloatFn(const TargetLibraryInfo *TLI, Type *Ty,
+ LibFunc::Func DoubleFn, LibFunc::Func FloatFn,
+ LibFunc::Func LongDoubleFn) {
+ switch (Ty->getTypeID()) {
+ case Type::FloatTyID:
+ return TLI->has(FloatFn);
+ case Type::DoubleTyID:
+ return TLI->has(DoubleFn);
+ default:
+ return TLI->has(LongDoubleFn);
+ }
+}
+
//===----------------------------------------------------------------------===//
// Fortified Library Call Optimizations
//===----------------------------------------------------------------------===//
// Otherwise, the character is a constant, see if the first argument is
// a string literal. If so, we can constant fold.
StringRef Str;
- if (!getConstantStringInfo(SrcStr, Str))
+ if (!getConstantStringInfo(SrcStr, Str)) {
+ if (TD && CharC->isZero()) // strchr(p, 0) -> p + strlen(p)
+ return B.CreateGEP(SrcStr, EmitStrLen(SrcStr, B, TD, TLI), "strchr");
return 0;
+ }
// Compute the offset, make sure to handle the case when we're searching for
// zero (a weird way to spell strlen).
- size_t I = CharC->getSExtValue() == 0 ?
+ size_t I = (0xFF & CharC->getSExtValue()) == 0 ?
Str.size() : Str.find(CharC->getSExtValue());
if (I == StringRef::npos) // Didn't find the char. strchr returns null.
return Constant::getNullValue(CI->getType());
}
// Compute the offset.
- size_t I = CharC->getSExtValue() == 0 ?
+ size_t I = (0xFF & CharC->getSExtValue()) == 0 ?
Str.size() : Str.rfind(CharC->getSExtValue());
if (I == StringRef::npos) // Didn't find the char. Return null.
return Constant::getNullValue(CI->getType());
};
struct StrLenOpt : public LibCallOptimization {
+ virtual bool ignoreCallingConv() { return true; }
virtual Value *callOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) {
FunctionType *FT = Callee->getFunctionType();
if (FT->getNumParams() != 1 ||
// Constant folding.
if (HasS1 && HasS2) {
size_t I = S1.find_first_of(S2);
- if (I == std::string::npos) // No match.
+ if (I == StringRef::npos) // No match.
return Constant::getNullValue(CI->getType());
return B.CreateGEP(CI->getArgOperand(0), B.getInt64(I), "strpbrk");
if (isa<ConstantPointerNull>(EndPtr)) {
// With a null EndPtr, this function won't capture the main argument.
// It would be readonly too, except that it still may write to errno.
- CI->addAttribute(1, Attributes::get(Callee->getContext(),
- Attributes::NoCapture));
+ CI->addAttribute(1, Attribute::NoCapture);
}
return 0;
// If both strings are known, constant fold it.
if (HasStr1 && HasStr2) {
- std::string::size_type Offset = SearchStr.find(ToFindStr);
+ size_t Offset = SearchStr.find(ToFindStr);
if (Offset == StringRef::npos) // strstr("foo", "bar") -> null
return Constant::getNullValue(CI->getType());
if (FT->getNumParams() != 3 || FT->getReturnType() != FT->getParamType(0) ||
!FT->getParamType(0)->isPointerTy() ||
!FT->getParamType(1)->isIntegerTy() ||
- FT->getParamType(2) != TD->getIntPtrType(*Context))
+ FT->getParamType(2) != TD->getIntPtrType(FT->getParamType(0)))
return 0;
// memset(p, v, n) -> llvm.memset(p, v, n, 1)
}
};
+// Double -> Float Shrinking Optimizations for Binary Functions like 'fmin/fmax'
+struct BinaryDoubleFPOpt : public LibCallOptimization {
+ bool CheckRetType;
+ BinaryDoubleFPOpt(bool CheckReturnType): CheckRetType(CheckReturnType) {}
+ virtual Value *callOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) {
+ FunctionType *FT = Callee->getFunctionType();
+ // Just make sure this has 2 arguments of the same FP type, which match the
+ // result type.
+ if (FT->getNumParams() != 2 || FT->getReturnType() != FT->getParamType(0) ||
+ FT->getParamType(0) != FT->getParamType(1) ||
+ !FT->getParamType(0)->isFloatingPointTy())
+ return 0;
+
+ if (CheckRetType) {
+ // Check if all the uses for function like 'fmin/fmax' are converted to
+ // float.
+ for (Value::use_iterator UseI = CI->use_begin(); UseI != CI->use_end();
+ ++UseI) {
+ FPTruncInst *Cast = dyn_cast<FPTruncInst>(*UseI);
+ if (Cast == 0 || !Cast->getType()->isFloatTy())
+ return 0;
+ }
+ }
+
+ // If this is something like 'fmin((double)floatval1, (double)floatval2)',
+ // we convert it to fminf.
+ FPExtInst *Cast1 = dyn_cast<FPExtInst>(CI->getArgOperand(0));
+ FPExtInst *Cast2 = dyn_cast<FPExtInst>(CI->getArgOperand(1));
+ if (Cast1 == 0 || !Cast1->getOperand(0)->getType()->isFloatTy() ||
+ Cast2 == 0 || !Cast2->getOperand(0)->getType()->isFloatTy())
+ return 0;
+
+ // fmin((double)floatval1, (double)floatval2)
+ // -> (double)fmin(floatval1, floatval2)
+ Value *V = NULL;
+ Value *V1 = Cast1->getOperand(0);
+ Value *V2 = Cast2->getOperand(0);
+ V = EmitBinaryFloatFnCall(V1, V2, Callee->getName(), B,
+ Callee->getAttributes());
+ return B.CreateFPExt(V, B.getDoubleTy());
+ }
+};
+
struct UnsafeFPLibCallOptimization : public LibCallOptimization {
bool UnsafeFPShrink;
UnsafeFPLibCallOptimization(bool UnsafeFPShrink) {
Value *Op1 = CI->getArgOperand(0), *Op2 = CI->getArgOperand(1);
if (ConstantFP *Op1C = dyn_cast<ConstantFP>(Op1)) {
- if (Op1C->isExactlyValue(1.0)) // pow(1.0, x) -> 1.0
+ // pow(1.0, x) -> 1.0
+ if (Op1C->isExactlyValue(1.0))
return Op1C;
- if (Op1C->isExactlyValue(2.0)) // pow(2.0, x) -> exp2(x)
+ // pow(2.0, x) -> exp2(x)
+ if (Op1C->isExactlyValue(2.0) &&
+ hasUnaryFloatFn(TLI, Op1->getType(), LibFunc::exp2, LibFunc::exp2f,
+ LibFunc::exp2l))
return EmitUnaryFloatFnCall(Op2, "exp2", B, Callee->getAttributes());
+ // pow(10.0, x) -> exp10(x)
+ if (Op1C->isExactlyValue(10.0) &&
+ hasUnaryFloatFn(TLI, Op1->getType(), LibFunc::exp10, LibFunc::exp10f,
+ LibFunc::exp10l))
+ return EmitUnaryFloatFnCall(Op2, TLI->getName(LibFunc::exp10), B,
+ Callee->getAttributes());
}
ConstantFP *Op2C = dyn_cast<ConstantFP>(Op2);
if (Op2C->getValueAPF().isZero()) // pow(x, 0.0) -> 1.0
return ConstantFP::get(CI->getType(), 1.0);
- if (Op2C->isExactlyValue(0.5)) {
+ if (Op2C->isExactlyValue(0.5) &&
+ hasUnaryFloatFn(TLI, Op2->getType(), LibFunc::sqrt, LibFunc::sqrtf,
+ LibFunc::sqrtl) &&
+ hasUnaryFloatFn(TLI, Op2->getType(), LibFunc::fabs, LibFunc::fabsf,
+ LibFunc::fabsl)) {
// Expand pow(x, 0.5) to (x == -infinity ? +infinity : fabs(sqrt(x))).
// This is faster than calling pow, and still handles negative zero
// and negative infinity correctly.
virtual Value *callOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) {
Value *Ret = NULL;
if (UnsafeFPShrink && Callee->getName() == "exp2" &&
- TLI->has(LibFunc::exp2)) {
+ TLI->has(LibFunc::exp2f)) {
UnaryDoubleFPOpt UnsafeUnaryDoubleFP(true);
Ret = UnsafeUnaryDoubleFP.callOptimizer(Callee, CI, B);
}
}
};
+struct SinCosPiOpt : public LibCallOptimization {
+ SinCosPiOpt() {}
+
+ virtual Value *callOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) {
+ // Make sure the prototype is as expected, otherwise the rest of the
+ // function is probably invalid and likely to abort.
+ if (!isTrigLibCall(CI))
+ return 0;
+
+ Value *Arg = CI->getArgOperand(0);
+ SmallVector<CallInst *, 1> SinCalls;
+ SmallVector<CallInst *, 1> CosCalls;
+ SmallVector<CallInst *, 1> SinCosCalls;
+
+ bool IsFloat = Arg->getType()->isFloatTy();
+
+ // Look for all compatible sinpi, cospi and sincospi calls with the same
+ // argument. If there are enough (in some sense) we can make the
+ // substitution.
+ for (Value::use_iterator UI = Arg->use_begin(), UE = Arg->use_end();
+ UI != UE; ++UI)
+ classifyArgUse(*UI, CI->getParent(), IsFloat, SinCalls, CosCalls,
+ SinCosCalls);
+
+ // It's only worthwhile if both sinpi and cospi are actually used.
+ if (SinCosCalls.empty() && (SinCalls.empty() || CosCalls.empty()))
+ return 0;
+
+ Value *Sin, *Cos, *SinCos;
+ insertSinCosCall(B, CI->getCalledFunction(), Arg, IsFloat, Sin, Cos,
+ SinCos);
+
+ replaceTrigInsts(SinCalls, Sin);
+ replaceTrigInsts(CosCalls, Cos);
+ replaceTrigInsts(SinCosCalls, SinCos);
+
+ return 0;
+ }
+
+ bool isTrigLibCall(CallInst *CI) {
+ Function *Callee = CI->getCalledFunction();
+ FunctionType *FT = Callee->getFunctionType();
+
+ // We can only hope to do anything useful if we can ignore things like errno
+ // and floating-point exceptions.
+ bool AttributesSafe = CI->hasFnAttr(Attribute::NoUnwind) &&
+ CI->hasFnAttr(Attribute::ReadNone);
+
+ // Other than that we need float(float) or double(double)
+ return AttributesSafe && FT->getNumParams() == 1 &&
+ FT->getReturnType() == FT->getParamType(0) &&
+ (FT->getParamType(0)->isFloatTy() ||
+ FT->getParamType(0)->isDoubleTy());
+ }
+
+ void classifyArgUse(Value *Val, BasicBlock *BB, bool IsFloat,
+ SmallVectorImpl<CallInst *> &SinCalls,
+ SmallVectorImpl<CallInst *> &CosCalls,
+ SmallVectorImpl<CallInst *> &SinCosCalls) {
+ CallInst *CI = dyn_cast<CallInst>(Val);
+
+ if (!CI)
+ return;
+
+ Function *Callee = CI->getCalledFunction();
+ StringRef FuncName = Callee->getName();
+ LibFunc::Func Func;
+ if (!TLI->getLibFunc(FuncName, Func) || !TLI->has(Func) ||
+ !isTrigLibCall(CI))
+ return;
+
+ if (IsFloat) {
+ if (Func == LibFunc::sinpif)
+ SinCalls.push_back(CI);
+ else if (Func == LibFunc::cospif)
+ CosCalls.push_back(CI);
+ else if (Func == LibFunc::sincospi_stretf)
+ SinCosCalls.push_back(CI);
+ } else {
+ if (Func == LibFunc::sinpi)
+ SinCalls.push_back(CI);
+ else if (Func == LibFunc::cospi)
+ CosCalls.push_back(CI);
+ else if (Func == LibFunc::sincospi_stret)
+ SinCosCalls.push_back(CI);
+ }
+ }
+
+ void replaceTrigInsts(SmallVectorImpl<CallInst*> &Calls, Value *Res) {
+ for (SmallVectorImpl<CallInst*>::iterator I = Calls.begin(),
+ E = Calls.end();
+ I != E; ++I) {
+ LCS->replaceAllUsesWith(*I, Res);
+ }
+ }
+
+ void insertSinCosCall(IRBuilder<> &B, Function *OrigCallee, Value *Arg,
+ bool UseFloat, Value *&Sin, Value *&Cos,
+ Value *&SinCos) {
+ Type *ArgTy = Arg->getType();
+ Type *ResTy;
+ StringRef Name;
+
+ Triple T(OrigCallee->getParent()->getTargetTriple());
+ if (UseFloat) {
+ Name = "__sincospi_stretf";
+
+ assert(T.getArch() != Triple::x86 && "x86 messy and unsupported for now");
+ // x86_64 can't use {float, float} since that would be returned in both
+ // xmm0 and xmm1, which isn't what a real struct would do.
+ ResTy = T.getArch() == Triple::x86_64
+ ? static_cast<Type *>(VectorType::get(ArgTy, 2))
+ : static_cast<Type *>(StructType::get(ArgTy, ArgTy, NULL));
+ } else {
+ Name = "__sincospi_stret";
+ ResTy = StructType::get(ArgTy, ArgTy, NULL);
+ }
+
+ Module *M = OrigCallee->getParent();
+ Value *Callee = M->getOrInsertFunction(Name, OrigCallee->getAttributes(),
+ ResTy, ArgTy, NULL);
+
+ if (Instruction *ArgInst = dyn_cast<Instruction>(Arg)) {
+ // If the argument is an instruction, it must dominate all uses so put our
+ // sincos call there.
+ BasicBlock::iterator Loc = ArgInst;
+ B.SetInsertPoint(ArgInst->getParent(), ++Loc);
+ } else {
+ // Otherwise (e.g. for a constant) the beginning of the function is as
+ // good a place as any.
+ BasicBlock &EntryBB = B.GetInsertBlock()->getParent()->getEntryBlock();
+ B.SetInsertPoint(&EntryBB, EntryBB.begin());
+ }
+
+ SinCos = B.CreateCall(Callee, Arg, "sincospi");
+
+ if (SinCos->getType()->isStructTy()) {
+ Sin = B.CreateExtractValue(SinCos, 0, "sinpi");
+ Cos = B.CreateExtractValue(SinCos, 1, "cospi");
+ } else {
+ Sin = B.CreateExtractElement(SinCos, ConstantInt::get(B.getInt32Ty(), 0),
+ "sinpi");
+ Cos = B.CreateExtractElement(SinCos, ConstantInt::get(B.getInt32Ty(), 1),
+ "cospi");
+ }
+ }
+
+};
+
//===----------------------------------------------------------------------===//
// Integer Library Call Optimizations
//===----------------------------------------------------------------------===//
};
struct AbsOpt : public LibCallOptimization {
+ virtual bool ignoreCallingConv() { return true; }
virtual Value *callOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) {
FunctionType *FT = Callee->getFunctionType();
// We require integer(integer) where the types agree.
// Formatting and IO Library Call Optimizations
//===----------------------------------------------------------------------===//
+struct ErrorReportingOpt : public LibCallOptimization {
+ ErrorReportingOpt(int S = -1) : StreamArg(S) {}
+
+ virtual Value *callOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &) {
+ // Error reporting calls should be cold, mark them as such.
+ // This applies even to non-builtin calls: it is only a hint and applies to
+ // functions that the frontend might not understand as builtins.
+
+ // This heuristic was suggested in:
+ // Improving Static Branch Prediction in a Compiler
+ // Brian L. Deitrich, Ben-Chung Cheng, Wen-mei W. Hwu
+ // Proceedings of PACT'98, Oct. 1998, IEEE
+
+ if (!CI->hasFnAttr(Attribute::Cold) && isReportingError(Callee, CI)) {
+ CI->addAttribute(AttributeSet::FunctionIndex, Attribute::Cold);
+ }
+
+ return 0;
+ }
+
+protected:
+ bool isReportingError(Function *Callee, CallInst *CI) {
+ if (!ColdErrorCalls)
+ return false;
+
+ if (!Callee || !Callee->isDeclaration())
+ return false;
+
+ if (StreamArg < 0)
+ return true;
+
+ // These functions might be considered cold, but only if their stream
+ // argument is stderr.
+
+ if (StreamArg >= (int) CI->getNumArgOperands())
+ return false;
+ LoadInst *LI = dyn_cast<LoadInst>(CI->getArgOperand(StreamArg));
+ if (!LI)
+ return false;
+ GlobalVariable *GV = dyn_cast<GlobalVariable>(LI->getPointerOperand());
+ if (!GV || !GV->isDeclaration())
+ return false;
+ return GV->getName() == "stderr";
+ }
+
+ int StreamArg;
+};
+
struct PrintFOpt : public LibCallOptimization {
Value *optimizeFixedFormatString(Function *Callee, CallInst *CI,
IRBuilder<> &B) {
// printf("foo\n") --> puts("foo")
if (FormatStr[FormatStr.size()-1] == '\n' &&
- FormatStr.find('%') == std::string::npos) { // no format characters.
+ FormatStr.find('%') == StringRef::npos) { // No format characters.
// Create a string literal with no \n on it. We expect the constant merge
// pass to be run after this pass, to merge duplicate strings.
FormatStr = FormatStr.drop_back();
struct FPrintFOpt : public LibCallOptimization {
Value *optimizeFixedFormatString(Function *Callee, CallInst *CI,
IRBuilder<> &B) {
+ ErrorReportingOpt ER(/* StreamArg = */ 0);
+ (void) ER.callOptimizer(Callee, CI, B);
+
// All the optimizations depend on the format string.
StringRef FormatStr;
if (!getConstantStringInfo(CI->getArgOperand(1), FormatStr))
return 0;
+ // Do not do any of the following transformations if the fprintf return
+ // value is used, in general the fprintf return value is not compatible
+ // with fwrite(), fputc() or fputs().
+ if (!CI->use_empty())
+ return 0;
+
// fprintf(F, "foo") --> fwrite("foo", 3, 1, F)
if (CI->getNumArgOperands() == 2) {
for (unsigned i = 0, e = FormatStr.size(); i != e; ++i)
// These optimizations require DataLayout.
if (!TD) return 0;
- Value *NewCI = EmitFWrite(CI->getArgOperand(1),
- ConstantInt::get(TD->getIntPtrType(*Context),
- FormatStr.size()),
- CI->getArgOperand(0), B, TD, TLI);
- return NewCI ? ConstantInt::get(CI->getType(), FormatStr.size()) : 0;
+ return EmitFWrite(CI->getArgOperand(1),
+ ConstantInt::get(TD->getIntPtrType(*Context),
+ FormatStr.size()),
+ CI->getArgOperand(0), B, TD, TLI);
}
// The remaining optimizations require the format string to be "%s" or "%c"
if (FormatStr[1] == 'c') {
// fprintf(F, "%c", chr) --> fputc(chr, F)
if (!CI->getArgOperand(2)->getType()->isIntegerTy()) return 0;
- Value *NewCI = EmitFPutC(CI->getArgOperand(2), CI->getArgOperand(0), B,
- TD, TLI);
- return NewCI ? ConstantInt::get(CI->getType(), 1) : 0;
+ return EmitFPutC(CI->getArgOperand(2), CI->getArgOperand(0), B, TD, TLI);
}
if (FormatStr[1] == 's') {
// fprintf(F, "%s", str) --> fputs(str, F)
- if (!CI->getArgOperand(2)->getType()->isPointerTy() || !CI->use_empty())
+ if (!CI->getArgOperand(2)->getType()->isPointerTy())
return 0;
return EmitFPutS(CI->getArgOperand(2), CI->getArgOperand(0), B, TD, TLI);
}
struct FWriteOpt : public LibCallOptimization {
virtual Value *callOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) {
+ ErrorReportingOpt ER(/* StreamArg = */ 3);
+ (void) ER.callOptimizer(Callee, CI, B);
+
// Require a pointer, an integer, an integer, a pointer, returning integer.
FunctionType *FT = Callee->getFunctionType();
if (FT->getNumParams() != 4 || !FT->getParamType(0)->isPointerTy() ||
}
};
+struct FPutsOpt : public LibCallOptimization {
+ virtual Value *callOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) {
+ ErrorReportingOpt ER(/* StreamArg = */ 1);
+ (void) ER.callOptimizer(Callee, CI, B);
+
+ // These optimizations require DataLayout.
+ if (!TD) return 0;
+
+ // Require two pointers. Also, we can't optimize if return value is used.
+ FunctionType *FT = Callee->getFunctionType();
+ if (FT->getNumParams() != 2 || !FT->getParamType(0)->isPointerTy() ||
+ !FT->getParamType(1)->isPointerTy() ||
+ !CI->use_empty())
+ return 0;
+
+ // fputs(s,F) --> fwrite(s,1,strlen(s),F)
+ uint64_t Len = GetStringLength(CI->getArgOperand(0));
+ if (!Len) return 0;
+ // Known to have no uses (see above).
+ return EmitFWrite(CI->getArgOperand(0),
+ ConstantInt::get(TD->getIntPtrType(*Context), Len-1),
+ CI->getArgOperand(1), B, TD, TLI);
+ }
+};
+
+struct PutsOpt : public LibCallOptimization {
+ virtual Value *callOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) {
+ // Require one fixed pointer argument and an integer/void result.
+ FunctionType *FT = Callee->getFunctionType();
+ if (FT->getNumParams() < 1 || !FT->getParamType(0)->isPointerTy() ||
+ !(FT->getReturnType()->isIntegerTy() ||
+ FT->getReturnType()->isVoidTy()))
+ return 0;
+
+ // Check for a constant string.
+ StringRef Str;
+ if (!getConstantStringInfo(CI->getArgOperand(0), Str))
+ return 0;
+
+ if (Str.empty() && CI->use_empty()) {
+ // puts("") -> putchar('\n')
+ Value *Res = EmitPutChar(B.getInt32('\n'), B, TD, TLI);
+ if (CI->use_empty() || !Res) return Res;
+ return B.CreateIntCast(Res, CI->getType(), true);
+ }
+
+ return 0;
+ }
+};
+
} // End anonymous namespace.
namespace llvm {
const TargetLibraryInfo *TLI;
const LibCallSimplifier *LCS;
bool UnsafeFPShrink;
- StringMap<LibCallOptimization*> Optimizations;
-
- // Fortified library call optimizations.
- MemCpyChkOpt MemCpyChk;
- MemMoveChkOpt MemMoveChk;
- MemSetChkOpt MemSetChk;
- StrCpyChkOpt StrCpyChk;
- StpCpyChkOpt StpCpyChk;
- StrNCpyChkOpt StrNCpyChk;
-
- // String library call optimizations.
- StrCatOpt StrCat;
- StrNCatOpt StrNCat;
- StrChrOpt StrChr;
- StrRChrOpt StrRChr;
- StrCmpOpt StrCmp;
- StrNCmpOpt StrNCmp;
- StrCpyOpt StrCpy;
- StpCpyOpt StpCpy;
- StrNCpyOpt StrNCpy;
- StrLenOpt StrLen;
- StrPBrkOpt StrPBrk;
- StrToOpt StrTo;
- StrSpnOpt StrSpn;
- StrCSpnOpt StrCSpn;
- StrStrOpt StrStr;
-
- // Memory library call optimizations.
- MemCmpOpt MemCmp;
- MemCpyOpt MemCpy;
- MemMoveOpt MemMove;
- MemSetOpt MemSet;
// Math library call optimizations.
- UnaryDoubleFPOpt UnaryDoubleFP, UnsafeUnaryDoubleFP;
- CosOpt Cos; PowOpt Pow; Exp2Opt Exp2;
-
- // Integer library call optimizations.
- FFSOpt FFS;
- AbsOpt Abs;
- IsDigitOpt IsDigit;
- IsAsciiOpt IsAscii;
- ToAsciiOpt ToAscii;
-
- // Formatting and IO library call optimizations.
- PrintFOpt PrintF;
- SPrintFOpt SPrintF;
- FPrintFOpt FPrintF;
- FWriteOpt FWrite;
-
- void initOptimizations();
- void addOpt(LibFunc::Func F, LibCallOptimization* Opt);
- void addOpt(LibFunc::Func F1, LibFunc::Func F2, LibCallOptimization* Opt);
+ CosOpt Cos;
+ PowOpt Pow;
+ Exp2Opt Exp2;
public:
LibCallSimplifierImpl(const DataLayout *TD, const TargetLibraryInfo *TLI,
const LibCallSimplifier *LCS,
bool UnsafeFPShrink = false)
- : UnaryDoubleFP(false), UnsafeUnaryDoubleFP(true),
- Cos(UnsafeFPShrink), Pow(UnsafeFPShrink), Exp2(UnsafeFPShrink) {
+ : Cos(UnsafeFPShrink), Pow(UnsafeFPShrink), Exp2(UnsafeFPShrink) {
this->TD = TD;
this->TLI = TLI;
this->LCS = LCS;
}
Value *optimizeCall(CallInst *CI);
+ LibCallOptimization *lookupOptimization(CallInst *CI);
+ bool hasFloatVersion(StringRef FuncName);
};
-void LibCallSimplifierImpl::initOptimizations() {
- // Fortified library call optimizations.
- Optimizations["__memcpy_chk"] = &MemCpyChk;
- Optimizations["__memmove_chk"] = &MemMoveChk;
- Optimizations["__memset_chk"] = &MemSetChk;
- Optimizations["__strcpy_chk"] = &StrCpyChk;
- Optimizations["__stpcpy_chk"] = &StpCpyChk;
- Optimizations["__strncpy_chk"] = &StrNCpyChk;
- Optimizations["__stpncpy_chk"] = &StrNCpyChk;
-
- // String library call optimizations.
- addOpt(LibFunc::strcat, &StrCat);
- addOpt(LibFunc::strncat, &StrNCat);
- addOpt(LibFunc::strchr, &StrChr);
- addOpt(LibFunc::strrchr, &StrRChr);
- addOpt(LibFunc::strcmp, &StrCmp);
- addOpt(LibFunc::strncmp, &StrNCmp);
- addOpt(LibFunc::strcpy, &StrCpy);
- addOpt(LibFunc::stpcpy, &StpCpy);
- addOpt(LibFunc::strncpy, &StrNCpy);
- addOpt(LibFunc::strlen, &StrLen);
- addOpt(LibFunc::strpbrk, &StrPBrk);
- addOpt(LibFunc::strtol, &StrTo);
- addOpt(LibFunc::strtod, &StrTo);
- addOpt(LibFunc::strtof, &StrTo);
- addOpt(LibFunc::strtoul, &StrTo);
- addOpt(LibFunc::strtoll, &StrTo);
- addOpt(LibFunc::strtold, &StrTo);
- addOpt(LibFunc::strtoull, &StrTo);
- addOpt(LibFunc::strspn, &StrSpn);
- addOpt(LibFunc::strcspn, &StrCSpn);
- addOpt(LibFunc::strstr, &StrStr);
-
- // Memory library call optimizations.
- addOpt(LibFunc::memcmp, &MemCmp);
- addOpt(LibFunc::memcpy, &MemCpy);
- addOpt(LibFunc::memmove, &MemMove);
- addOpt(LibFunc::memset, &MemSet);
+bool LibCallSimplifierImpl::hasFloatVersion(StringRef FuncName) {
+ LibFunc::Func Func;
+ SmallString<20> FloatFuncName = FuncName;
+ FloatFuncName += 'f';
+ if (TLI->getLibFunc(FloatFuncName, Func))
+ return TLI->has(Func);
+ return false;
+}
- // Math library call optimizations.
- addOpt(LibFunc::ceil, LibFunc::ceilf, &UnaryDoubleFP);
- addOpt(LibFunc::fabs, LibFunc::fabsf, &UnaryDoubleFP);
- addOpt(LibFunc::floor, LibFunc::floorf, &UnaryDoubleFP);
- addOpt(LibFunc::rint, LibFunc::rintf, &UnaryDoubleFP);
- addOpt(LibFunc::round, LibFunc::roundf, &UnaryDoubleFP);
- addOpt(LibFunc::nearbyint, LibFunc::nearbyintf, &UnaryDoubleFP);
- addOpt(LibFunc::trunc, LibFunc::truncf, &UnaryDoubleFP);
-
- if(UnsafeFPShrink) {
- addOpt(LibFunc::acos, LibFunc::acosf, &UnsafeUnaryDoubleFP);
- addOpt(LibFunc::acosh, LibFunc::acoshf, &UnsafeUnaryDoubleFP);
- addOpt(LibFunc::asin, LibFunc::asinf, &UnsafeUnaryDoubleFP);
- addOpt(LibFunc::asinh, LibFunc::asinhf, &UnsafeUnaryDoubleFP);
- addOpt(LibFunc::atan, LibFunc::atanf, &UnsafeUnaryDoubleFP);
- addOpt(LibFunc::atanh, LibFunc::atanhf, &UnsafeUnaryDoubleFP);
- addOpt(LibFunc::cbrt, LibFunc::cbrtf, &UnsafeUnaryDoubleFP);
- addOpt(LibFunc::cosh, LibFunc::coshf, &UnsafeUnaryDoubleFP);
- addOpt(LibFunc::exp, LibFunc::expf, &UnsafeUnaryDoubleFP);
- addOpt(LibFunc::exp10, LibFunc::exp10f, &UnsafeUnaryDoubleFP);
- addOpt(LibFunc::expm1, LibFunc::expm1f, &UnsafeUnaryDoubleFP);
- addOpt(LibFunc::log, LibFunc::logf, &UnsafeUnaryDoubleFP);
- addOpt(LibFunc::log10, LibFunc::log10f, &UnsafeUnaryDoubleFP);
- addOpt(LibFunc::log1p, LibFunc::log1pf, &UnsafeUnaryDoubleFP);
- addOpt(LibFunc::log2, LibFunc::log2f, &UnsafeUnaryDoubleFP);
- addOpt(LibFunc::logb, LibFunc::logbf, &UnsafeUnaryDoubleFP);
- addOpt(LibFunc::sin, LibFunc::sinf, &UnsafeUnaryDoubleFP);
- addOpt(LibFunc::sinh, LibFunc::sinhf, &UnsafeUnaryDoubleFP);
- addOpt(LibFunc::sqrt, LibFunc::sqrtf, &UnsafeUnaryDoubleFP);
- addOpt(LibFunc::tan, LibFunc::tanf, &UnsafeUnaryDoubleFP);
- addOpt(LibFunc::tanh, LibFunc::tanhf, &UnsafeUnaryDoubleFP);
- }
-
- addOpt(LibFunc::cosf, &Cos);
- addOpt(LibFunc::cos, &Cos);
- addOpt(LibFunc::cosl, &Cos);
- addOpt(LibFunc::powf, &Pow);
- addOpt(LibFunc::pow, &Pow);
- addOpt(LibFunc::powl, &Pow);
- Optimizations["llvm.pow.f32"] = &Pow;
- Optimizations["llvm.pow.f64"] = &Pow;
- Optimizations["llvm.pow.f80"] = &Pow;
- Optimizations["llvm.pow.f128"] = &Pow;
- Optimizations["llvm.pow.ppcf128"] = &Pow;
- addOpt(LibFunc::exp2l, &Exp2);
- addOpt(LibFunc::exp2, &Exp2);
- addOpt(LibFunc::exp2f, &Exp2);
- Optimizations["llvm.exp2.ppcf128"] = &Exp2;
- Optimizations["llvm.exp2.f128"] = &Exp2;
- Optimizations["llvm.exp2.f80"] = &Exp2;
- Optimizations["llvm.exp2.f64"] = &Exp2;
- Optimizations["llvm.exp2.f32"] = &Exp2;
+// Fortified library call optimizations.
+static MemCpyChkOpt MemCpyChk;
+static MemMoveChkOpt MemMoveChk;
+static MemSetChkOpt MemSetChk;
+static StrCpyChkOpt StrCpyChk;
+static StpCpyChkOpt StpCpyChk;
+static StrNCpyChkOpt StrNCpyChk;
+
+// String library call optimizations.
+static StrCatOpt StrCat;
+static StrNCatOpt StrNCat;
+static StrChrOpt StrChr;
+static StrRChrOpt StrRChr;
+static StrCmpOpt StrCmp;
+static StrNCmpOpt StrNCmp;
+static StrCpyOpt StrCpy;
+static StpCpyOpt StpCpy;
+static StrNCpyOpt StrNCpy;
+static StrLenOpt StrLen;
+static StrPBrkOpt StrPBrk;
+static StrToOpt StrTo;
+static StrSpnOpt StrSpn;
+static StrCSpnOpt StrCSpn;
+static StrStrOpt StrStr;
+
+// Memory library call optimizations.
+static MemCmpOpt MemCmp;
+static MemCpyOpt MemCpy;
+static MemMoveOpt MemMove;
+static MemSetOpt MemSet;
+
+// Math library call optimizations.
+static UnaryDoubleFPOpt UnaryDoubleFP(false);
+static BinaryDoubleFPOpt BinaryDoubleFP(false);
+static UnaryDoubleFPOpt UnsafeUnaryDoubleFP(true);
+static SinCosPiOpt SinCosPi;
// Integer library call optimizations.
- addOpt(LibFunc::ffs, &FFS);
- addOpt(LibFunc::ffsl, &FFS);
- addOpt(LibFunc::ffsll, &FFS);
- addOpt(LibFunc::abs, &Abs);
- addOpt(LibFunc::labs, &Abs);
- addOpt(LibFunc::llabs, &Abs);
- addOpt(LibFunc::isdigit, &IsDigit);
- addOpt(LibFunc::isascii, &IsAscii);
- addOpt(LibFunc::toascii, &ToAscii);
-
- // Formatting and IO library call optimizations.
- addOpt(LibFunc::printf, &PrintF);
- addOpt(LibFunc::sprintf, &SPrintF);
- addOpt(LibFunc::fprintf, &FPrintF);
- addOpt(LibFunc::fwrite, &FWrite);
+static FFSOpt FFS;
+static AbsOpt Abs;
+static IsDigitOpt IsDigit;
+static IsAsciiOpt IsAscii;
+static ToAsciiOpt ToAscii;
+
+// Formatting and IO library call optimizations.
+static ErrorReportingOpt ErrorReporting;
+static ErrorReportingOpt ErrorReporting0(0);
+static ErrorReportingOpt ErrorReporting1(1);
+static PrintFOpt PrintF;
+static SPrintFOpt SPrintF;
+static FPrintFOpt FPrintF;
+static FWriteOpt FWrite;
+static FPutsOpt FPuts;
+static PutsOpt Puts;
+
+LibCallOptimization *LibCallSimplifierImpl::lookupOptimization(CallInst *CI) {
+ LibFunc::Func Func;
+ Function *Callee = CI->getCalledFunction();
+ StringRef FuncName = Callee->getName();
+
+ // Next check for intrinsics.
+ if (IntrinsicInst *II = dyn_cast<IntrinsicInst>(CI)) {
+ switch (II->getIntrinsicID()) {
+ case Intrinsic::pow:
+ return &Pow;
+ case Intrinsic::exp2:
+ return &Exp2;
+ default:
+ return 0;
+ }
+ }
+
+ // Then check for known library functions.
+ if (TLI->getLibFunc(FuncName, Func) && TLI->has(Func)) {
+ switch (Func) {
+ case LibFunc::strcat:
+ return &StrCat;
+ case LibFunc::strncat:
+ return &StrNCat;
+ case LibFunc::strchr:
+ return &StrChr;
+ case LibFunc::strrchr:
+ return &StrRChr;
+ case LibFunc::strcmp:
+ return &StrCmp;
+ case LibFunc::strncmp:
+ return &StrNCmp;
+ case LibFunc::strcpy:
+ return &StrCpy;
+ case LibFunc::stpcpy:
+ return &StpCpy;
+ case LibFunc::strncpy:
+ return &StrNCpy;
+ case LibFunc::strlen:
+ return &StrLen;
+ case LibFunc::strpbrk:
+ return &StrPBrk;
+ case LibFunc::strtol:
+ case LibFunc::strtod:
+ case LibFunc::strtof:
+ case LibFunc::strtoul:
+ case LibFunc::strtoll:
+ case LibFunc::strtold:
+ case LibFunc::strtoull:
+ return &StrTo;
+ case LibFunc::strspn:
+ return &StrSpn;
+ case LibFunc::strcspn:
+ return &StrCSpn;
+ case LibFunc::strstr:
+ return &StrStr;
+ case LibFunc::memcmp:
+ return &MemCmp;
+ case LibFunc::memcpy:
+ return &MemCpy;
+ case LibFunc::memmove:
+ return &MemMove;
+ case LibFunc::memset:
+ return &MemSet;
+ case LibFunc::cosf:
+ case LibFunc::cos:
+ case LibFunc::cosl:
+ return &Cos;
+ case LibFunc::sinpif:
+ case LibFunc::sinpi:
+ case LibFunc::cospif:
+ case LibFunc::cospi:
+ return &SinCosPi;
+ case LibFunc::powf:
+ case LibFunc::pow:
+ case LibFunc::powl:
+ return &Pow;
+ case LibFunc::exp2l:
+ case LibFunc::exp2:
+ case LibFunc::exp2f:
+ return &Exp2;
+ case LibFunc::ffs:
+ case LibFunc::ffsl:
+ case LibFunc::ffsll:
+ return &FFS;
+ case LibFunc::abs:
+ case LibFunc::labs:
+ case LibFunc::llabs:
+ return &Abs;
+ case LibFunc::isdigit:
+ return &IsDigit;
+ case LibFunc::isascii:
+ return &IsAscii;
+ case LibFunc::toascii:
+ return &ToAscii;
+ case LibFunc::printf:
+ return &PrintF;
+ case LibFunc::sprintf:
+ return &SPrintF;
+ case LibFunc::fprintf:
+ return &FPrintF;
+ case LibFunc::fwrite:
+ return &FWrite;
+ case LibFunc::fputs:
+ return &FPuts;
+ case LibFunc::puts:
+ return &Puts;
+ case LibFunc::perror:
+ return &ErrorReporting;
+ case LibFunc::vfprintf:
+ case LibFunc::fiprintf:
+ return &ErrorReporting0;
+ case LibFunc::fputc:
+ return &ErrorReporting1;
+ case LibFunc::ceil:
+ case LibFunc::fabs:
+ case LibFunc::floor:
+ case LibFunc::rint:
+ case LibFunc::round:
+ case LibFunc::nearbyint:
+ case LibFunc::trunc:
+ if (hasFloatVersion(FuncName))
+ return &UnaryDoubleFP;
+ return 0;
+ case LibFunc::acos:
+ case LibFunc::acosh:
+ case LibFunc::asin:
+ case LibFunc::asinh:
+ case LibFunc::atan:
+ case LibFunc::atanh:
+ case LibFunc::cbrt:
+ case LibFunc::cosh:
+ case LibFunc::exp:
+ case LibFunc::exp10:
+ case LibFunc::expm1:
+ case LibFunc::log:
+ case LibFunc::log10:
+ case LibFunc::log1p:
+ case LibFunc::log2:
+ case LibFunc::logb:
+ case LibFunc::sin:
+ case LibFunc::sinh:
+ case LibFunc::sqrt:
+ case LibFunc::tan:
+ case LibFunc::tanh:
+ if (UnsafeFPShrink && hasFloatVersion(FuncName))
+ return &UnsafeUnaryDoubleFP;
+ return 0;
+ case LibFunc::fmin:
+ case LibFunc::fmax:
+ if (hasFloatVersion(FuncName))
+ return &BinaryDoubleFP;
+ return 0;
+ case LibFunc::memcpy_chk:
+ return &MemCpyChk;
+ default:
+ return 0;
+ }
+ }
+
+ // Finally check for fortified library calls.
+ if (FuncName.endswith("_chk")) {
+ if (FuncName == "__memmove_chk")
+ return &MemMoveChk;
+ else if (FuncName == "__memset_chk")
+ return &MemSetChk;
+ else if (FuncName == "__strcpy_chk")
+ return &StrCpyChk;
+ else if (FuncName == "__stpcpy_chk")
+ return &StpCpyChk;
+ else if (FuncName == "__strncpy_chk")
+ return &StrNCpyChk;
+ else if (FuncName == "__stpncpy_chk")
+ return &StrNCpyChk;
+ }
+
+ return 0;
+
}
Value *LibCallSimplifierImpl::optimizeCall(CallInst *CI) {
- if (Optimizations.empty())
- initOptimizations();
-
- Function *Callee = CI->getCalledFunction();
- LibCallOptimization *LCO = Optimizations.lookup(Callee->getName());
+ LibCallOptimization *LCO = lookupOptimization(CI);
if (LCO) {
IRBuilder<> Builder(CI);
return LCO->optimizeCall(CI, TD, TLI, LCS, Builder);
return 0;
}
-void LibCallSimplifierImpl::addOpt(LibFunc::Func F, LibCallOptimization* Opt) {
- if (TLI->has(F))
- Optimizations[TLI->getName(F)] = Opt;
-}
-
-void LibCallSimplifierImpl::addOpt(LibFunc::Func F1, LibFunc::Func F2,
- LibCallOptimization* Opt) {
- if (TLI->has(F1) && TLI->has(F2))
- Optimizations[TLI->getName(F1)] = Opt;
-}
-
LibCallSimplifier::LibCallSimplifier(const DataLayout *TD,
const TargetLibraryInfo *TLI,
bool UnsafeFPShrink) {
}
Value *LibCallSimplifier::optimizeCall(CallInst *CI) {
+ if (CI->isNoBuiltin()) return 0;
return Impl->optimizeCall(CI);
}
}
}
+
+// TODO:
+// Additional cases that we need to add to this file:
+//
+// cbrt:
+// * cbrt(expN(X)) -> expN(x/3)
+// * cbrt(sqrt(x)) -> pow(x,1/6)
+// * cbrt(sqrt(x)) -> pow(x,1/9)
+//
+// exp, expf, expl:
+// * exp(log(x)) -> x
+//
+// log, logf, logl:
+// * log(exp(x)) -> x
+// * log(x**y) -> y*log(x)
+// * log(exp(y)) -> y*log(e)
+// * log(exp2(y)) -> y*log(2)
+// * log(exp10(y)) -> y*log(10)
+// * log(sqrt(x)) -> 0.5*log(x)
+// * log(pow(x,y)) -> y*log(x)
+//
+// lround, lroundf, lroundl:
+// * lround(cnst) -> cnst'
+//
+// pow, powf, powl:
+// * pow(exp(x),y) -> exp(x*y)
+// * pow(sqrt(x),y) -> pow(x,y*0.5)
+// * pow(pow(x,y),z)-> pow(x,y*z)
+//
+// round, roundf, roundl:
+// * round(cnst) -> cnst'
+//
+// signbit:
+// * signbit(cnst) -> cnst'
+// * signbit(nncst) -> 0 (if pstv is a non-negative constant)
+//
+// sqrt, sqrtf, sqrtl:
+// * sqrt(expN(x)) -> expN(x*0.5)
+// * sqrt(Nroot(x)) -> pow(x,1/(2*N))
+// * sqrt(pow(x,y)) -> pow(|x|,y*0.5)
+//
+// tan, tanf, tanl:
+// * tan(atan(x)) -> x
+//
+// trunc, truncf, truncl:
+// * trunc(cnst) -> cnst'
+//
+//
projects / oota-llvm.git / blobdiff