ca22d427b9
Summary: If file stream arg is not captured and source is fopen, we could replace IO calls by unlocked IO ("_unlocked" function variants) to gain better speed,
Reviewers: efriedma, RKSimon, spatel, sanjoy, hfinkel, majnemer, lebedev.ri, rja
Reviewed By: rja
Subscribers: rja, srhines, efriedma, lebedev.ri, llvm-commits
Differential Revision: https://reviews.llvm.org/D45736
llvm-svn: 332452
165 lines
7.8 KiB
C++
165 lines
7.8 KiB
C++
//===- BuildLibCalls.h - Utility builder for libcalls -----------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file exposes an interface to build some C language libcalls for
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// optimization passes that need to call the various functions.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_TRANSFORMS_UTILS_BUILDLIBCALLS_H
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#define LLVM_TRANSFORMS_UTILS_BUILDLIBCALLS_H
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#include "llvm/Analysis/TargetLibraryInfo.h"
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#include "llvm/IR/IRBuilder.h"
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namespace llvm {
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class Value;
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class DataLayout;
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class TargetLibraryInfo;
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/// Analyze the name and prototype of the given function and set any
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/// applicable attributes.
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/// If the library function is unavailable, this doesn't modify it.
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///
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/// Returns true if any attributes were set and false otherwise.
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bool inferLibFuncAttributes(Function &F, const TargetLibraryInfo &TLI);
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/// Check whether the overloaded unary floating point function
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/// corresponding to \a Ty is available.
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bool hasUnaryFloatFn(const TargetLibraryInfo *TLI, Type *Ty,
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LibFunc DoubleFn, LibFunc FloatFn,
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LibFunc LongDoubleFn);
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/// Return V if it is an i8*, otherwise cast it to i8*.
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Value *castToCStr(Value *V, IRBuilder<> &B);
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/// Emit a call to the strlen function to the builder, for the specified
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/// pointer. Ptr is required to be some pointer type, and the return value has
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/// 'intptr_t' type.
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Value *emitStrLen(Value *Ptr, IRBuilder<> &B, const DataLayout &DL,
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const TargetLibraryInfo *TLI);
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/// Emit a call to the strnlen function to the builder, for the specified
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/// pointer. Ptr is required to be some pointer type, MaxLen must be of size_t
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/// type, and the return value has 'intptr_t' type.
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Value *emitStrNLen(Value *Ptr, Value *MaxLen, IRBuilder<> &B,
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const DataLayout &DL, const TargetLibraryInfo *TLI);
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/// Emit a call to the strchr function to the builder, for the specified
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/// pointer and character. Ptr is required to be some pointer type, and the
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/// return value has 'i8*' type.
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Value *emitStrChr(Value *Ptr, char C, IRBuilder<> &B,
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const TargetLibraryInfo *TLI);
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/// Emit a call to the strncmp function to the builder.
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Value *emitStrNCmp(Value *Ptr1, Value *Ptr2, Value *Len, IRBuilder<> &B,
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const DataLayout &DL, const TargetLibraryInfo *TLI);
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/// Emit a call to the strcpy function to the builder, for the specified
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/// pointer arguments.
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Value *emitStrCpy(Value *Dst, Value *Src, IRBuilder<> &B,
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const TargetLibraryInfo *TLI, StringRef Name = "strcpy");
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/// Emit a call to the strncpy function to the builder, for the specified
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/// pointer arguments and length.
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Value *emitStrNCpy(Value *Dst, Value *Src, Value *Len, IRBuilder<> &B,
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const TargetLibraryInfo *TLI, StringRef Name = "strncpy");
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/// Emit a call to the __memcpy_chk function to the builder. This expects that
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/// the Len and ObjSize have type 'intptr_t' and Dst/Src are pointers.
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Value *emitMemCpyChk(Value *Dst, Value *Src, Value *Len, Value *ObjSize,
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IRBuilder<> &B, const DataLayout &DL,
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const TargetLibraryInfo *TLI);
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/// Emit a call to the memchr function. This assumes that Ptr is a pointer,
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/// Val is an i32 value, and Len is an 'intptr_t' value.
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Value *emitMemChr(Value *Ptr, Value *Val, Value *Len, IRBuilder<> &B,
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const DataLayout &DL, const TargetLibraryInfo *TLI);
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/// Emit a call to the memcmp function.
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Value *emitMemCmp(Value *Ptr1, Value *Ptr2, Value *Len, IRBuilder<> &B,
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const DataLayout &DL, const TargetLibraryInfo *TLI);
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/// Emit a call to the unary function named 'Name' (e.g. 'floor'). This
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/// function is known to take a single of type matching 'Op' and returns one
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/// value with the same type. If 'Op' is a long double, 'l' is added as the
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/// suffix of name, if 'Op' is a float, we add a 'f' suffix.
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Value *emitUnaryFloatFnCall(Value *Op, StringRef Name, IRBuilder<> &B,
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const AttributeList &Attrs);
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/// Emit a call to the binary function named 'Name' (e.g. 'fmin'). This
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/// function is known to take type matching 'Op1' and 'Op2' and return one
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/// value with the same type. If 'Op1/Op2' are long double, 'l' is added as
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/// the suffix of name, if 'Op1/Op2' are float, we add a 'f' suffix.
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Value *emitBinaryFloatFnCall(Value *Op1, Value *Op2, StringRef Name,
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IRBuilder<> &B, const AttributeList &Attrs);
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/// Emit a call to the putchar function. This assumes that Char is an integer.
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Value *emitPutChar(Value *Char, IRBuilder<> &B, const TargetLibraryInfo *TLI);
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/// Emit a call to the puts function. This assumes that Str is some pointer.
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Value *emitPutS(Value *Str, IRBuilder<> &B, const TargetLibraryInfo *TLI);
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/// Emit a call to the fputc function. This assumes that Char is an i32, and
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/// File is a pointer to FILE.
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Value *emitFPutC(Value *Char, Value *File, IRBuilder<> &B,
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const TargetLibraryInfo *TLI);
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/// Emit a call to the fputc_unlocked function. This assumes that Char is an
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/// i32, and File is a pointer to FILE.
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Value *emitFPutCUnlocked(Value *Char, Value *File, IRBuilder<> &B,
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const TargetLibraryInfo *TLI);
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/// Emit a call to the fputs function. Str is required to be a pointer and
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/// File is a pointer to FILE.
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Value *emitFPutS(Value *Str, Value *File, IRBuilder<> &B,
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const TargetLibraryInfo *TLI);
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/// Emit a call to the fputs_unlocked function. Str is required to be a
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/// pointer and File is a pointer to FILE.
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Value *emitFPutSUnlocked(Value *Str, Value *File, IRBuilder<> &B,
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const TargetLibraryInfo *TLI);
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/// Emit a call to the fwrite function. This assumes that Ptr is a pointer,
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/// Size is an 'intptr_t', and File is a pointer to FILE.
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Value *emitFWrite(Value *Ptr, Value *Size, Value *File, IRBuilder<> &B,
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const DataLayout &DL, const TargetLibraryInfo *TLI);
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/// Emit a call to the malloc function.
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Value *emitMalloc(Value *Num, IRBuilder<> &B, const DataLayout &DL,
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const TargetLibraryInfo *TLI);
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/// Emit a call to the calloc function.
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Value *emitCalloc(Value *Num, Value *Size, const AttributeList &Attrs,
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IRBuilder<> &B, const TargetLibraryInfo &TLI);
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/// Emit a call to the fwrite_unlocked function. This assumes that Ptr is a
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/// pointer, Size is an 'intptr_t', N is nmemb and File is a pointer to FILE.
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Value *emitFWriteUnlocked(Value *Ptr, Value *Size, Value *N, Value *File,
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IRBuilder<> &B, const DataLayout &DL,
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const TargetLibraryInfo *TLI);
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/// Emit a call to the fgetc_unlocked function. File is a pointer to FILE.
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Value *emitFGetCUnlocked(Value *File, IRBuilder<> &B,
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const TargetLibraryInfo *TLI);
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/// Emit a call to the fgets_unlocked function. Str is required to be a
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/// pointer, Size is an i32 and File is a pointer to FILE.
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Value *emitFGetSUnlocked(Value *Str, Value *Size, Value *File, IRBuilder<> &B,
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const TargetLibraryInfo *TLI);
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/// Emit a call to the fread_unlocked function. This assumes that Ptr is a
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/// pointer, Size is an 'intptr_t', N is nmemb and File is a pointer to FILE.
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Value *emitFReadUnlocked(Value *Ptr, Value *Size, Value *N, Value *File,
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IRBuilder<> &B, const DataLayout &DL,
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const TargetLibraryInfo *TLI);
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}
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#endif
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