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llvm-mirror/lib/Transforms/Utils/BuildLibCalls.cpp
Richard Smith c07a815edb Revert "[BuildLibcalls, Attrs] Support more variants of C++'s new, add attributes for C++'s delete" 
Several of the new attributes here were incorrect, and even the ones
that are generally correct were being added even to nobuiltin calls.

This reverts commit bb3f169b59e1c8bd7fd70097532220bbd11e9967.
2021-02-04 13:59:49 -08:00

1683 lines
56 KiB
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//===- BuildLibCalls.cpp - Utility builder for libcalls -------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file implements some functions that will create standard C libcalls.
//
//===----------------------------------------------------------------------===//
#include "llvm/Transforms/Utils/BuildLibCalls.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/Analysis/TargetLibraryInfo.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/IRBuilder.h"
#include "llvm/IR/Intrinsics.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/Type.h"
#include "llvm/Analysis/MemoryBuiltins.h"
using namespace llvm;
#define DEBUG_TYPE "build-libcalls"
//- Infer Attributes ---------------------------------------------------------//
STATISTIC(NumReadNone, "Number of functions inferred as readnone");
STATISTIC(NumInaccessibleMemOnly,
"Number of functions inferred as inaccessiblememonly");
STATISTIC(NumReadOnly, "Number of functions inferred as readonly");
STATISTIC(NumArgMemOnly, "Number of functions inferred as argmemonly");
STATISTIC(NumInaccessibleMemOrArgMemOnly,
"Number of functions inferred as inaccessiblemem_or_argmemonly");
STATISTIC(NumNoUnwind, "Number of functions inferred as nounwind");
STATISTIC(NumNoCapture, "Number of arguments inferred as nocapture");
STATISTIC(NumWriteOnlyArg, "Number of arguments inferred as writeonly");
STATISTIC(NumSExtArg, "Number of arguments inferred as signext");
STATISTIC(NumReadOnlyArg, "Number of arguments inferred as readonly");
STATISTIC(NumNoAlias, "Number of function returns inferred as noalias");
STATISTIC(NumNoUndef, "Number of function returns inferred as noundef returns");
STATISTIC(NumNonNull, "Number of function returns inferred as nonnull returns");
STATISTIC(NumReturnedArg, "Number of arguments inferred as returned");
STATISTIC(NumWillReturn, "Number of functions inferred as willreturn");
static bool setDoesNotAccessMemory(Function &F) {
if (F.doesNotAccessMemory())
return false;
F.setDoesNotAccessMemory();
++NumReadNone;
return true;
}
static bool setOnlyAccessesInaccessibleMemory(Function &F) {
if (F.onlyAccessesInaccessibleMemory())
return false;
F.setOnlyAccessesInaccessibleMemory();
++NumInaccessibleMemOnly;
return true;
}
static bool setOnlyReadsMemory(Function &F) {
if (F.onlyReadsMemory())
return false;
F.setOnlyReadsMemory();
++NumReadOnly;
return true;
}
static bool setOnlyAccessesArgMemory(Function &F) {
if (F.onlyAccessesArgMemory())
return false;
F.setOnlyAccessesArgMemory();
++NumArgMemOnly;
return true;
}
static bool setOnlyAccessesInaccessibleMemOrArgMem(Function &F) {
if (F.onlyAccessesInaccessibleMemOrArgMem())
return false;
F.setOnlyAccessesInaccessibleMemOrArgMem();
++NumInaccessibleMemOrArgMemOnly;
return true;
}
static bool setDoesNotThrow(Function &F) {
if (F.doesNotThrow())
return false;
F.setDoesNotThrow();
++NumNoUnwind;
return true;
}
static bool setRetDoesNotAlias(Function &F) {
if (F.hasAttribute(AttributeList::ReturnIndex, Attribute::NoAlias))
return false;
F.addAttribute(AttributeList::ReturnIndex, Attribute::NoAlias);
++NumNoAlias;
return true;
}
static bool setDoesNotCapture(Function &F, unsigned ArgNo) {
if (F.hasParamAttribute(ArgNo, Attribute::NoCapture))
return false;
F.addParamAttr(ArgNo, Attribute::NoCapture);
++NumNoCapture;
return true;
}
static bool setDoesNotAlias(Function &F, unsigned ArgNo) {
if (F.hasParamAttribute(ArgNo, Attribute::NoAlias))
return false;
F.addParamAttr(ArgNo, Attribute::NoAlias);
++NumNoAlias;
return true;
}
static bool setOnlyReadsMemory(Function &F, unsigned ArgNo) {
if (F.hasParamAttribute(ArgNo, Attribute::ReadOnly))
return false;
F.addParamAttr(ArgNo, Attribute::ReadOnly);
++NumReadOnlyArg;
return true;
}
static bool setOnlyWritesMemory(Function &F, unsigned ArgNo) {
if (F.hasParamAttribute(ArgNo, Attribute::WriteOnly))
return false;
F.addParamAttr(ArgNo, Attribute::WriteOnly);
++NumWriteOnlyArg;
return true;
}
static bool setSignExtendedArg(Function &F, unsigned ArgNo) {
if (F.hasParamAttribute(ArgNo, Attribute::SExt))
return false;
F.addParamAttr(ArgNo, Attribute::SExt);
++NumSExtArg;
return true;
}
static bool setRetNoUndef(Function &F) {
if (!F.getReturnType()->isVoidTy() &&
!F.hasAttribute(AttributeList::ReturnIndex, Attribute::NoUndef)) {
F.addAttribute(AttributeList::ReturnIndex, Attribute::NoUndef);
++NumNoUndef;
return true;
}
return false;
}
static bool setArgsNoUndef(Function &F) {
bool Changed = false;
for (unsigned ArgNo = 0; ArgNo < F.arg_size(); ++ArgNo) {
if (!F.hasParamAttribute(ArgNo, Attribute::NoUndef)) {
F.addParamAttr(ArgNo, Attribute::NoUndef);
++NumNoUndef;
Changed = true;
}
}
return Changed;
}
static bool setRetAndArgsNoUndef(Function &F) {
return setRetNoUndef(F) | setArgsNoUndef(F);
}
static bool setRetNonNull(Function &F) {
assert(F.getReturnType()->isPointerTy() &&
"nonnull applies only to pointers");
if (F.hasAttribute(AttributeList::ReturnIndex, Attribute::NonNull))
return false;
F.addAttribute(AttributeList::ReturnIndex, Attribute::NonNull);
++NumNonNull;
return true;
}
static bool setReturnedArg(Function &F, unsigned ArgNo) {
if (F.hasParamAttribute(ArgNo, Attribute::Returned))
return false;
F.addParamAttr(ArgNo, Attribute::Returned);
++NumReturnedArg;
return true;
}
static bool setNonLazyBind(Function &F) {
if (F.hasFnAttribute(Attribute::NonLazyBind))
return false;
F.addFnAttr(Attribute::NonLazyBind);
return true;
}
static bool setDoesNotFreeMemory(Function &F) {
if (F.hasFnAttribute(Attribute::NoFree))
return false;
F.addFnAttr(Attribute::NoFree);
return true;
}
static bool setWillReturn(Function &F) {
if (F.hasFnAttribute(Attribute::WillReturn))
return false;
F.addFnAttr(Attribute::WillReturn);
++NumWillReturn;
return true;
}
bool llvm::inferLibFuncAttributes(Module *M, StringRef Name,
const TargetLibraryInfo &TLI) {
Function *F = M->getFunction(Name);
if (!F)
return false;
return inferLibFuncAttributes(*F, TLI);
}
bool llvm::inferLibFuncAttributes(Function &F, const TargetLibraryInfo &TLI) {
LibFunc TheLibFunc;
if (!(TLI.getLibFunc(F, TheLibFunc) && TLI.has(TheLibFunc)))
return false;
bool Changed = false;
if(!isLibFreeFunction(&F, TheLibFunc) && !isReallocLikeFn(&F, &TLI))
Changed |= setDoesNotFreeMemory(F);
if (F.getParent() != nullptr && F.getParent()->getRtLibUseGOT())
Changed |= setNonLazyBind(F);
switch (TheLibFunc) {
case LibFunc_strlen:
case LibFunc_wcslen:
Changed |= setOnlyReadsMemory(F);
Changed |= setDoesNotThrow(F);
Changed |= setOnlyAccessesArgMemory(F);
Changed |= setWillReturn(F);
Changed |= setDoesNotCapture(F, 0);
return Changed;
case LibFunc_strchr:
case LibFunc_strrchr:
Changed |= setOnlyAccessesArgMemory(F);
Changed |= setOnlyReadsMemory(F);
Changed |= setDoesNotThrow(F);
Changed |= setWillReturn(F);
return Changed;
case LibFunc_strtol:
case LibFunc_strtod:
case LibFunc_strtof:
case LibFunc_strtoul:
case LibFunc_strtoll:
case LibFunc_strtold:
case LibFunc_strtoull:
Changed |= setDoesNotThrow(F);
Changed |= setWillReturn(F);
Changed |= setDoesNotCapture(F, 1);
Changed |= setOnlyReadsMemory(F, 0);
return Changed;
case LibFunc_strcpy:
case LibFunc_strncpy:
case LibFunc_strcat:
case LibFunc_strncat:
Changed |= setWillReturn(F);
Changed |= setReturnedArg(F, 0);
LLVM_FALLTHROUGH;
case LibFunc_stpcpy:
case LibFunc_stpncpy:
Changed |= setOnlyAccessesArgMemory(F);
Changed |= setDoesNotThrow(F);
Changed |= setWillReturn(F);
Changed |= setDoesNotCapture(F, 1);
Changed |= setOnlyWritesMemory(F, 0);
Changed |= setOnlyReadsMemory(F, 1);
Changed |= setDoesNotAlias(F, 0);
Changed |= setDoesNotAlias(F, 1);
return Changed;
case LibFunc_strxfrm:
Changed |= setDoesNotThrow(F);
Changed |= setWillReturn(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setDoesNotCapture(F, 1);
Changed |= setOnlyReadsMemory(F, 1);
return Changed;
case LibFunc_strcmp: // 0,1
case LibFunc_strspn: // 0,1
case LibFunc_strncmp: // 0,1
case LibFunc_strcspn: // 0,1
Changed |= setDoesNotThrow(F);
Changed |= setOnlyAccessesArgMemory(F);
Changed |= setWillReturn(F);
Changed |= setOnlyReadsMemory(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setDoesNotCapture(F, 1);
return Changed;
case LibFunc_strcoll:
case LibFunc_strcasecmp: // 0,1
case LibFunc_strncasecmp: //
// Those functions may depend on the locale, which may be accessed through
// global memory.
Changed |= setOnlyReadsMemory(F);
Changed |= setDoesNotThrow(F);
Changed |= setWillReturn(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setDoesNotCapture(F, 1);
return Changed;
case LibFunc_strstr:
case LibFunc_strpbrk:
Changed |= setOnlyAccessesArgMemory(F);
Changed |= setOnlyReadsMemory(F);
Changed |= setDoesNotThrow(F);
Changed |= setWillReturn(F);
Changed |= setDoesNotCapture(F, 1);
return Changed;
case LibFunc_strtok:
case LibFunc_strtok_r:
Changed |= setDoesNotThrow(F);
Changed |= setWillReturn(F);
Changed |= setDoesNotCapture(F, 1);
Changed |= setOnlyReadsMemory(F, 1);
return Changed;
case LibFunc_scanf:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setOnlyReadsMemory(F, 0);
return Changed;
case LibFunc_setbuf:
case LibFunc_setvbuf:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 0);
return Changed;
case LibFunc_strdup:
case LibFunc_strndup:
Changed |= setOnlyAccessesInaccessibleMemOrArgMem(F);
Changed |= setDoesNotThrow(F);
Changed |= setRetDoesNotAlias(F);
Changed |= setWillReturn(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setOnlyReadsMemory(F, 0);
return Changed;
case LibFunc_stat:
case LibFunc_statvfs:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setDoesNotCapture(F, 1);
Changed |= setOnlyReadsMemory(F, 0);
return Changed;
case LibFunc_sscanf:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setDoesNotCapture(F, 1);
Changed |= setOnlyReadsMemory(F, 0);
Changed |= setOnlyReadsMemory(F, 1);
return Changed;
case LibFunc_sprintf:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setDoesNotAlias(F, 0);
Changed |= setOnlyWritesMemory(F, 0);
Changed |= setDoesNotCapture(F, 1);
Changed |= setOnlyReadsMemory(F, 1);
return Changed;
case LibFunc_snprintf:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setDoesNotAlias(F, 0);
Changed |= setOnlyWritesMemory(F, 0);
Changed |= setDoesNotCapture(F, 2);
Changed |= setOnlyReadsMemory(F, 2);
return Changed;
case LibFunc_setitimer:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setWillReturn(F);
Changed |= setDoesNotCapture(F, 1);
Changed |= setDoesNotCapture(F, 2);
Changed |= setOnlyReadsMemory(F, 1);
return Changed;
case LibFunc_system:
// May throw; "system" is a valid pthread cancellation point.
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setOnlyReadsMemory(F, 0);
return Changed;
case LibFunc_malloc:
case LibFunc_vec_malloc:
Changed |= setOnlyAccessesInaccessibleMemory(F);
Changed |= setRetNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setRetDoesNotAlias(F);
Changed |= setWillReturn(F);
return Changed;
case LibFunc_memcmp:
Changed |= setOnlyAccessesArgMemory(F);
Changed |= setOnlyReadsMemory(F);
Changed |= setDoesNotThrow(F);
Changed |= setWillReturn(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setDoesNotCapture(F, 1);
return Changed;
case LibFunc_memchr:
case LibFunc_memrchr:
Changed |= setDoesNotThrow(F);
Changed |= setOnlyAccessesArgMemory(F);
Changed |= setOnlyReadsMemory(F);
Changed |= setWillReturn(F);
return Changed;
case LibFunc_modf:
case LibFunc_modff:
case LibFunc_modfl:
Changed |= setDoesNotThrow(F);
Changed |= setWillReturn(F);
Changed |= setDoesNotCapture(F, 1);
return Changed;
case LibFunc_memcpy:
Changed |= setDoesNotThrow(F);
Changed |= setOnlyAccessesArgMemory(F);
Changed |= setWillReturn(F);
Changed |= setDoesNotAlias(F, 0);
Changed |= setReturnedArg(F, 0);
Changed |= setOnlyWritesMemory(F, 0);
Changed |= setDoesNotAlias(F, 1);
Changed |= setDoesNotCapture(F, 1);
Changed |= setOnlyReadsMemory(F, 1);
return Changed;
case LibFunc_memmove:
Changed |= setDoesNotThrow(F);
Changed |= setOnlyAccessesArgMemory(F);
Changed |= setWillReturn(F);
Changed |= setReturnedArg(F, 0);
Changed |= setOnlyWritesMemory(F, 0);
Changed |= setDoesNotCapture(F, 1);
Changed |= setOnlyReadsMemory(F, 1);
return Changed;
case LibFunc_mempcpy:
case LibFunc_memccpy:
Changed |= setDoesNotThrow(F);
Changed |= setOnlyAccessesArgMemory(F);
Changed |= setWillReturn(F);
Changed |= setDoesNotAlias(F, 0);
Changed |= setOnlyWritesMemory(F, 0);
Changed |= setDoesNotAlias(F, 1);
Changed |= setDoesNotCapture(F, 1);
Changed |= setOnlyReadsMemory(F, 1);
return Changed;
case LibFunc_memcpy_chk:
Changed |= setDoesNotThrow(F);
return Changed;
case LibFunc_memalign:
Changed |= setOnlyAccessesInaccessibleMemory(F);
Changed |= setRetNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setRetDoesNotAlias(F);
Changed |= setWillReturn(F);
return Changed;
case LibFunc_mkdir:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setOnlyReadsMemory(F, 0);
return Changed;
case LibFunc_mktime:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setWillReturn(F);
Changed |= setDoesNotCapture(F, 0);
return Changed;
case LibFunc_realloc:
case LibFunc_vec_realloc:
Changed |= setOnlyAccessesInaccessibleMemOrArgMem(F);
Changed |= setRetNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setRetDoesNotAlias(F);
Changed |= setWillReturn(F);
Changed |= setDoesNotCapture(F, 0);
return Changed;
case LibFunc_reallocf:
Changed |= setRetNoUndef(F);
Changed |= setWillReturn(F);
return Changed;
case LibFunc_read:
// May throw; "read" is a valid pthread cancellation point.
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotCapture(F, 1);
return Changed;
case LibFunc_rewind:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 0);
return Changed;
case LibFunc_rmdir:
case LibFunc_remove:
case LibFunc_realpath:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setOnlyReadsMemory(F, 0);
return Changed;
case LibFunc_rename:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setDoesNotCapture(F, 1);
Changed |= setOnlyReadsMemory(F, 0);
Changed |= setOnlyReadsMemory(F, 1);
return Changed;
case LibFunc_readlink:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setDoesNotCapture(F, 1);
Changed |= setOnlyReadsMemory(F, 0);
return Changed;
case LibFunc_write:
// May throw; "write" is a valid pthread cancellation point.
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotCapture(F, 1);
Changed |= setOnlyReadsMemory(F, 1);
return Changed;
case LibFunc_aligned_alloc:
Changed |= setOnlyAccessesInaccessibleMemory(F);
Changed |= setRetNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setRetDoesNotAlias(F);
Changed |= setWillReturn(F);
return Changed;
case LibFunc_bcopy:
Changed |= setDoesNotThrow(F);
Changed |= setOnlyAccessesArgMemory(F);
Changed |= setWillReturn(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setOnlyReadsMemory(F, 0);
Changed |= setOnlyWritesMemory(F, 1);
Changed |= setDoesNotCapture(F, 1);
return Changed;
case LibFunc_bcmp:
Changed |= setDoesNotThrow(F);
Changed |= setOnlyAccessesArgMemory(F);
Changed |= setOnlyReadsMemory(F);
Changed |= setWillReturn(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setDoesNotCapture(F, 1);
return Changed;
case LibFunc_bzero:
Changed |= setDoesNotThrow(F);
Changed |= setOnlyAccessesArgMemory(F);
Changed |= setWillReturn(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setOnlyWritesMemory(F, 0);
return Changed;
case LibFunc_calloc:
case LibFunc_vec_calloc:
Changed |= setOnlyAccessesInaccessibleMemory(F);
Changed |= setRetNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setRetDoesNotAlias(F);
Changed |= setWillReturn(F);
return Changed;
case LibFunc_chmod:
case LibFunc_chown:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setOnlyReadsMemory(F, 0);
return Changed;
case LibFunc_ctermid:
case LibFunc_clearerr:
case LibFunc_closedir:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 0);
return Changed;
case LibFunc_atoi:
case LibFunc_atol:
case LibFunc_atof:
case LibFunc_atoll:
Changed |= setDoesNotThrow(F);
Changed |= setOnlyReadsMemory(F);
Changed |= setWillReturn(F);
Changed |= setDoesNotCapture(F, 0);
return Changed;
case LibFunc_access:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setOnlyReadsMemory(F, 0);
return Changed;
case LibFunc_fopen:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setRetDoesNotAlias(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setDoesNotCapture(F, 1);
Changed |= setOnlyReadsMemory(F, 0);
Changed |= setOnlyReadsMemory(F, 1);
return Changed;
case LibFunc_fdopen:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setRetDoesNotAlias(F);
Changed |= setDoesNotCapture(F, 1);
Changed |= setOnlyReadsMemory(F, 1);
return Changed;
case LibFunc_feof:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 0);
return Changed;
case LibFunc_free:
case LibFunc_vec_free:
Changed |= setOnlyAccessesInaccessibleMemOrArgMem(F);
Changed |= setArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setWillReturn(F);
Changed |= setDoesNotCapture(F, 0);
return Changed;
case LibFunc_fseek:
case LibFunc_ftell:
case LibFunc_fgetc:
case LibFunc_fgetc_unlocked:
case LibFunc_fseeko:
case LibFunc_ftello:
case LibFunc_fileno:
case LibFunc_fflush:
case LibFunc_fclose:
case LibFunc_fsetpos:
case LibFunc_flockfile:
case LibFunc_funlockfile:
case LibFunc_ftrylockfile:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 0);
return Changed;
case LibFunc_ferror:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setOnlyReadsMemory(F);
return Changed;
case LibFunc_fputc:
case LibFunc_fputc_unlocked:
case LibFunc_fstat:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 1);
return Changed;
case LibFunc_frexp:
case LibFunc_frexpf:
case LibFunc_frexpl:
Changed |= setDoesNotThrow(F);
Changed |= setWillReturn(F);
Changed |= setDoesNotCapture(F, 1);
return Changed;
case LibFunc_fstatvfs:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 1);
return Changed;
case LibFunc_fgets:
case LibFunc_fgets_unlocked:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 2);
return Changed;
case LibFunc_fread:
case LibFunc_fread_unlocked:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setDoesNotCapture(F, 3);
return Changed;
case LibFunc_fwrite:
case LibFunc_fwrite_unlocked:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setDoesNotCapture(F, 3);
// FIXME: readonly #1?
return Changed;
case LibFunc_fputs:
case LibFunc_fputs_unlocked:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setDoesNotCapture(F, 1);
Changed |= setOnlyReadsMemory(F, 0);
return Changed;
case LibFunc_fscanf:
case LibFunc_fprintf:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setDoesNotCapture(F, 1);
Changed |= setOnlyReadsMemory(F, 1);
return Changed;
case LibFunc_fgetpos:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setDoesNotCapture(F, 1);
return Changed;
case LibFunc_getc:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 0);
return Changed;
case LibFunc_getlogin_r:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 0);
return Changed;
case LibFunc_getc_unlocked:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 0);
return Changed;
case LibFunc_getenv:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setOnlyReadsMemory(F);
Changed |= setDoesNotCapture(F, 0);
return Changed;
case LibFunc_gets:
case LibFunc_getchar:
case LibFunc_getchar_unlocked:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
return Changed;
case LibFunc_getitimer:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 1);
return Changed;
case LibFunc_getpwnam:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setOnlyReadsMemory(F, 0);
return Changed;
case LibFunc_ungetc:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 1);
return Changed;
case LibFunc_uname:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 0);
return Changed;
case LibFunc_unlink:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setOnlyReadsMemory(F, 0);
return Changed;
case LibFunc_unsetenv:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setOnlyReadsMemory(F, 0);
return Changed;
case LibFunc_utime:
case LibFunc_utimes:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setDoesNotCapture(F, 1);
Changed |= setOnlyReadsMemory(F, 0);
Changed |= setOnlyReadsMemory(F, 1);
return Changed;
case LibFunc_putc:
case LibFunc_putc_unlocked:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 1);
return Changed;
case LibFunc_puts:
case LibFunc_printf:
case LibFunc_perror:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setOnlyReadsMemory(F, 0);
return Changed;
case LibFunc_pread:
// May throw; "pread" is a valid pthread cancellation point.
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotCapture(F, 1);
return Changed;
case LibFunc_pwrite:
// May throw; "pwrite" is a valid pthread cancellation point.
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotCapture(F, 1);
Changed |= setOnlyReadsMemory(F, 1);
return Changed;
case LibFunc_putchar:
case LibFunc_putchar_unlocked:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
return Changed;
case LibFunc_popen:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setRetDoesNotAlias(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setDoesNotCapture(F, 1);
Changed |= setOnlyReadsMemory(F, 0);
Changed |= setOnlyReadsMemory(F, 1);
return Changed;
case LibFunc_pclose:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 0);
return Changed;
case LibFunc_vscanf:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setOnlyReadsMemory(F, 0);
return Changed;
case LibFunc_vsscanf:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setDoesNotCapture(F, 1);
Changed |= setOnlyReadsMemory(F, 0);
Changed |= setOnlyReadsMemory(F, 1);
return Changed;
case LibFunc_vfscanf:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setDoesNotCapture(F, 1);
Changed |= setOnlyReadsMemory(F, 1);
return Changed;
case LibFunc_valloc:
Changed |= setOnlyAccessesInaccessibleMemory(F);
Changed |= setRetNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setRetDoesNotAlias(F);
Changed |= setWillReturn(F);
return Changed;
case LibFunc_vprintf:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setOnlyReadsMemory(F, 0);
return Changed;
case LibFunc_vfprintf:
case LibFunc_vsprintf:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setDoesNotCapture(F, 1);
Changed |= setOnlyReadsMemory(F, 1);
return Changed;
case LibFunc_vsnprintf:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setDoesNotCapture(F, 2);
Changed |= setOnlyReadsMemory(F, 2);
return Changed;
case LibFunc_open:
// May throw; "open" is a valid pthread cancellation point.
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setOnlyReadsMemory(F, 0);
return Changed;
case LibFunc_opendir:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setRetDoesNotAlias(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setOnlyReadsMemory(F, 0);
return Changed;
case LibFunc_tmpfile:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setRetDoesNotAlias(F);
return Changed;
case LibFunc_times:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 0);
return Changed;
case LibFunc_htonl:
case LibFunc_htons:
case LibFunc_ntohl:
case LibFunc_ntohs:
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotAccessMemory(F);
return Changed;
case LibFunc_lstat:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setDoesNotCapture(F, 1);
Changed |= setOnlyReadsMemory(F, 0);
return Changed;
case LibFunc_lchown:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setOnlyReadsMemory(F, 0);
return Changed;
case LibFunc_qsort:
// May throw; places call through function pointer.
// Cannot give undef pointer/size
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotCapture(F, 3);
return Changed;
case LibFunc_dunder_strdup:
case LibFunc_dunder_strndup:
Changed |= setDoesNotThrow(F);
Changed |= setRetDoesNotAlias(F);
Changed |= setWillReturn(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setOnlyReadsMemory(F, 0);
return Changed;
case LibFunc_dunder_strtok_r:
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 1);
Changed |= setOnlyReadsMemory(F, 1);
return Changed;
case LibFunc_under_IO_getc:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 0);
return Changed;
case LibFunc_under_IO_putc:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 1);
return Changed;
case LibFunc_dunder_isoc99_scanf:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setOnlyReadsMemory(F, 0);
return Changed;
case LibFunc_stat64:
case LibFunc_lstat64:
case LibFunc_statvfs64:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setDoesNotCapture(F, 1);
Changed |= setOnlyReadsMemory(F, 0);
return Changed;
case LibFunc_dunder_isoc99_sscanf:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setDoesNotCapture(F, 1);
Changed |= setOnlyReadsMemory(F, 0);
Changed |= setOnlyReadsMemory(F, 1);
return Changed;
case LibFunc_fopen64:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setRetDoesNotAlias(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setDoesNotCapture(F, 1);
Changed |= setOnlyReadsMemory(F, 0);
Changed |= setOnlyReadsMemory(F, 1);
return Changed;
case LibFunc_fseeko64:
case LibFunc_ftello64:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 0);
return Changed;
case LibFunc_tmpfile64:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setRetDoesNotAlias(F);
return Changed;
case LibFunc_fstat64:
case LibFunc_fstatvfs64:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 1);
return Changed;
case LibFunc_open64:
// May throw; "open" is a valid pthread cancellation point.
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setOnlyReadsMemory(F, 0);
return Changed;
case LibFunc_gettimeofday:
// Currently some platforms have the restrict keyword on the arguments to
// gettimeofday. To be conservative, do not add noalias to gettimeofday's
// arguments.
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setDoesNotCapture(F, 1);
return Changed;
case LibFunc_Znwj: // new(unsigned int)
case LibFunc_Znwm: // new(unsigned long)
case LibFunc_Znaj: // new[](unsigned int)
case LibFunc_Znam: // new[](unsigned long)
case LibFunc_msvc_new_int: // new(unsigned int)
case LibFunc_msvc_new_longlong: // new(unsigned long long)
case LibFunc_msvc_new_array_int: // new[](unsigned int)
case LibFunc_msvc_new_array_longlong: // new[](unsigned long long)
Changed |= setOnlyAccessesInaccessibleMemory(F);
// Operator new always returns a nonnull noalias pointer
Changed |= setRetNoUndef(F);
Changed |= setRetNonNull(F);
Changed |= setRetDoesNotAlias(F);
Changed |= setWillReturn(F);
return Changed;
// TODO: add LibFunc entries for:
// case LibFunc_memset_pattern4:
// case LibFunc_memset_pattern8:
case LibFunc_memset_pattern16:
Changed |= setOnlyAccessesArgMemory(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setOnlyWritesMemory(F, 0);
Changed |= setDoesNotCapture(F, 1);
Changed |= setOnlyReadsMemory(F, 1);
return Changed;
case LibFunc_memset:
Changed |= setOnlyAccessesArgMemory(F);
Changed |= setWillReturn(F);
Changed |= setDoesNotThrow(F);
Changed |= setOnlyWritesMemory(F, 0);
return Changed;
// int __nvvm_reflect(const char *)
case LibFunc_nvvm_reflect:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotAccessMemory(F);
Changed |= setDoesNotThrow(F);
return Changed;
case LibFunc_ldexp:
case LibFunc_ldexpf:
case LibFunc_ldexpl:
Changed |= setSignExtendedArg(F, 1);
Changed |= setWillReturn(F);
return Changed;
case LibFunc_abs:
case LibFunc_acos:
case LibFunc_acosf:
case LibFunc_acosh:
case LibFunc_acoshf:
case LibFunc_acoshl:
case LibFunc_acosl:
case LibFunc_asin:
case LibFunc_asinf:
case LibFunc_asinh:
case LibFunc_asinhf:
case LibFunc_asinhl:
case LibFunc_asinl:
case LibFunc_atan:
case LibFunc_atan2:
case LibFunc_atan2f:
case LibFunc_atan2l:
case LibFunc_atanf:
case LibFunc_atanh:
case LibFunc_atanhf:
case LibFunc_atanhl:
case LibFunc_atanl:
case LibFunc_cbrt:
case LibFunc_cbrtf:
case LibFunc_cbrtl:
case LibFunc_ceil:
case LibFunc_ceilf:
case LibFunc_ceill:
case LibFunc_copysign:
case LibFunc_copysignf:
case LibFunc_copysignl:
case LibFunc_cos:
case LibFunc_cosh:
case LibFunc_coshf:
case LibFunc_coshl:
case LibFunc_cosf:
case LibFunc_cosl:
case LibFunc_cospi:
case LibFunc_cospif:
case LibFunc_exp:
case LibFunc_expf:
case LibFunc_expl:
case LibFunc_exp2:
case LibFunc_exp2f:
case LibFunc_exp2l:
case LibFunc_expm1:
case LibFunc_expm1f:
case LibFunc_expm1l:
case LibFunc_fabs:
case LibFunc_fabsf:
case LibFunc_fabsl:
case LibFunc_ffs:
case LibFunc_ffsl:
case LibFunc_ffsll:
case LibFunc_floor:
case LibFunc_floorf:
case LibFunc_floorl:
case LibFunc_fls:
case LibFunc_flsl:
case LibFunc_flsll:
case LibFunc_fmax:
case LibFunc_fmaxf:
case LibFunc_fmaxl:
case LibFunc_fmin:
case LibFunc_fminf:
case LibFunc_fminl:
case LibFunc_fmod:
case LibFunc_fmodf:
case LibFunc_fmodl:
case LibFunc_isascii:
case LibFunc_isdigit:
case LibFunc_labs:
case LibFunc_llabs:
case LibFunc_log:
case LibFunc_log10:
case LibFunc_log10f:
case LibFunc_log10l:
case LibFunc_log1p:
case LibFunc_log1pf:
case LibFunc_log1pl:
case LibFunc_log2:
case LibFunc_log2f:
case LibFunc_log2l:
case LibFunc_logb:
case LibFunc_logbf:
case LibFunc_logbl:
case LibFunc_logf:
case LibFunc_logl:
case LibFunc_nearbyint:
case LibFunc_nearbyintf:
case LibFunc_nearbyintl:
case LibFunc_pow:
case LibFunc_powf:
case LibFunc_powl:
case LibFunc_rint:
case LibFunc_rintf:
case LibFunc_rintl:
case LibFunc_round:
case LibFunc_roundf:
case LibFunc_roundl:
case LibFunc_sin:
case LibFunc_sincospif_stret:
case LibFunc_sinf:
case LibFunc_sinh:
case LibFunc_sinhf:
case LibFunc_sinhl:
case LibFunc_sinl:
case LibFunc_sinpi:
case LibFunc_sinpif:
case LibFunc_sqrt:
case LibFunc_sqrtf:
case LibFunc_sqrtl:
case LibFunc_strnlen:
case LibFunc_tan:
case LibFunc_tanf:
case LibFunc_tanh:
case LibFunc_tanhf:
case LibFunc_tanhl:
case LibFunc_tanl:
case LibFunc_toascii:
case LibFunc_trunc:
case LibFunc_truncf:
case LibFunc_truncl:
Changed |= setDoesNotThrow(F);
Changed |= setDoesNotFreeMemory(F);
Changed |= setWillReturn(F);
return Changed;
default:
// FIXME: It'd be really nice to cover all the library functions we're
// aware of here.
return false;
}
}
bool llvm::hasFloatFn(const TargetLibraryInfo *TLI, Type *Ty,
LibFunc DoubleFn, LibFunc FloatFn, LibFunc LongDoubleFn) {
switch (Ty->getTypeID()) {
case Type::HalfTyID:
return false;
case Type::FloatTyID:
return TLI->has(FloatFn);
case Type::DoubleTyID:
return TLI->has(DoubleFn);
default:
return TLI->has(LongDoubleFn);
}
}
StringRef llvm::getFloatFnName(const TargetLibraryInfo *TLI, Type *Ty,
LibFunc DoubleFn, LibFunc FloatFn,
LibFunc LongDoubleFn) {
assert(hasFloatFn(TLI, Ty, DoubleFn, FloatFn, LongDoubleFn) &&
"Cannot get name for unavailable function!");
switch (Ty->getTypeID()) {
case Type::HalfTyID:
llvm_unreachable("No name for HalfTy!");
case Type::FloatTyID:
return TLI->getName(FloatFn);
case Type::DoubleTyID:
return TLI->getName(DoubleFn);
default:
return TLI->getName(LongDoubleFn);
}
}
//- Emit LibCalls ------------------------------------------------------------//
Value *llvm::castToCStr(Value *V, IRBuilderBase &B) {
unsigned AS = V->getType()->getPointerAddressSpace();
return B.CreateBitCast(V, B.getInt8PtrTy(AS), "cstr");
}
static Value *emitLibCall(LibFunc TheLibFunc, Type *ReturnType,
ArrayRef<Type *> ParamTypes,
ArrayRef<Value *> Operands, IRBuilderBase &B,
const TargetLibraryInfo *TLI,
bool IsVaArgs = false) {
if (!TLI->has(TheLibFunc))
return nullptr;
Module *M = B.GetInsertBlock()->getModule();
StringRef FuncName = TLI->getName(TheLibFunc);
FunctionType *FuncType = FunctionType::get(ReturnType, ParamTypes, IsVaArgs);
FunctionCallee Callee = M->getOrInsertFunction(FuncName, FuncType);
inferLibFuncAttributes(M, FuncName, *TLI);
CallInst *CI = B.CreateCall(Callee, Operands, FuncName);
if (const Function *F =
dyn_cast<Function>(Callee.getCallee()->stripPointerCasts()))
CI->setCallingConv(F->getCallingConv());
return CI;
}
Value *llvm::emitStrLen(Value *Ptr, IRBuilderBase &B, const DataLayout &DL,
const TargetLibraryInfo *TLI) {
LLVMContext &Context = B.GetInsertBlock()->getContext();
return emitLibCall(LibFunc_strlen, DL.getIntPtrType(Context),
B.getInt8PtrTy(), castToCStr(Ptr, B), B, TLI);
}
Value *llvm::emitStrDup(Value *Ptr, IRBuilderBase &B,
const TargetLibraryInfo *TLI) {
return emitLibCall(LibFunc_strdup, B.getInt8PtrTy(), B.getInt8PtrTy(),
castToCStr(Ptr, B), B, TLI);
}
Value *llvm::emitStrChr(Value *Ptr, char C, IRBuilderBase &B,
const TargetLibraryInfo *TLI) {
Type *I8Ptr = B.getInt8PtrTy();
Type *I32Ty = B.getInt32Ty();
return emitLibCall(LibFunc_strchr, I8Ptr, {I8Ptr, I32Ty},
{castToCStr(Ptr, B), ConstantInt::get(I32Ty, C)}, B, TLI);
}
Value *llvm::emitStrNCmp(Value *Ptr1, Value *Ptr2, Value *Len, IRBuilderBase &B,
const DataLayout &DL, const TargetLibraryInfo *TLI) {
LLVMContext &Context = B.GetInsertBlock()->getContext();
return emitLibCall(
LibFunc_strncmp, B.getInt32Ty(),
{B.getInt8PtrTy(), B.getInt8PtrTy(), DL.getIntPtrType(Context)},
{castToCStr(Ptr1, B), castToCStr(Ptr2, B), Len}, B, TLI);
}
Value *llvm::emitStrCpy(Value *Dst, Value *Src, IRBuilderBase &B,
const TargetLibraryInfo *TLI) {
Type *I8Ptr = B.getInt8PtrTy();
return emitLibCall(LibFunc_strcpy, I8Ptr, {I8Ptr, I8Ptr},
{castToCStr(Dst, B), castToCStr(Src, B)}, B, TLI);
}
Value *llvm::emitStpCpy(Value *Dst, Value *Src, IRBuilderBase &B,
const TargetLibraryInfo *TLI) {
Type *I8Ptr = B.getInt8PtrTy();
return emitLibCall(LibFunc_stpcpy, I8Ptr, {I8Ptr, I8Ptr},
{castToCStr(Dst, B), castToCStr(Src, B)}, B, TLI);
}
Value *llvm::emitStrNCpy(Value *Dst, Value *Src, Value *Len, IRBuilderBase &B,
const TargetLibraryInfo *TLI) {
Type *I8Ptr = B.getInt8PtrTy();
return emitLibCall(LibFunc_strncpy, I8Ptr, {I8Ptr, I8Ptr, Len->getType()},
{castToCStr(Dst, B), castToCStr(Src, B), Len}, B, TLI);
}
Value *llvm::emitStpNCpy(Value *Dst, Value *Src, Value *Len, IRBuilderBase &B,
const TargetLibraryInfo *TLI) {
Type *I8Ptr = B.getInt8PtrTy();
return emitLibCall(LibFunc_stpncpy, I8Ptr, {I8Ptr, I8Ptr, Len->getType()},
{castToCStr(Dst, B), castToCStr(Src, B), Len}, B, TLI);
}
Value *llvm::emitMemCpyChk(Value *Dst, Value *Src, Value *Len, Value *ObjSize,
IRBuilderBase &B, const DataLayout &DL,
const TargetLibraryInfo *TLI) {
if (!TLI->has(LibFunc_memcpy_chk))
return nullptr;
Module *M = B.GetInsertBlock()->getModule();
AttributeList AS;
AS = AttributeList::get(M->getContext(), AttributeList::FunctionIndex,
Attribute::NoUnwind);
LLVMContext &Context = B.GetInsertBlock()->getContext();
FunctionCallee MemCpy = M->getOrInsertFunction(
"__memcpy_chk", AttributeList::get(M->getContext(), AS), B.getInt8PtrTy(),
B.getInt8PtrTy(), B.getInt8PtrTy(), DL.getIntPtrType(Context),
DL.getIntPtrType(Context));
Dst = castToCStr(Dst, B);
Src = castToCStr(Src, B);
CallInst *CI = B.CreateCall(MemCpy, {Dst, Src, Len, ObjSize});
if (const Function *F =
dyn_cast<Function>(MemCpy.getCallee()->stripPointerCasts()))
CI->setCallingConv(F->getCallingConv());
return CI;
}
Value *llvm::emitMemPCpy(Value *Dst, Value *Src, Value *Len, IRBuilderBase &B,
const DataLayout &DL, const TargetLibraryInfo *TLI) {
LLVMContext &Context = B.GetInsertBlock()->getContext();
return emitLibCall(
LibFunc_mempcpy, B.getInt8PtrTy(),
{B.getInt8PtrTy(), B.getInt8PtrTy(), DL.getIntPtrType(Context)},
{Dst, Src, Len}, B, TLI);
}
Value *llvm::emitMemChr(Value *Ptr, Value *Val, Value *Len, IRBuilderBase &B,
const DataLayout &DL, const TargetLibraryInfo *TLI) {
LLVMContext &Context = B.GetInsertBlock()->getContext();
return emitLibCall(
LibFunc_memchr, B.getInt8PtrTy(),
{B.getInt8PtrTy(), B.getInt32Ty(), DL.getIntPtrType(Context)},
{castToCStr(Ptr, B), Val, Len}, B, TLI);
}
Value *llvm::emitMemCmp(Value *Ptr1, Value *Ptr2, Value *Len, IRBuilderBase &B,
const DataLayout &DL, const TargetLibraryInfo *TLI) {
LLVMContext &Context = B.GetInsertBlock()->getContext();
return emitLibCall(
LibFunc_memcmp, B.getInt32Ty(),
{B.getInt8PtrTy(), B.getInt8PtrTy(), DL.getIntPtrType(Context)},
{castToCStr(Ptr1, B), castToCStr(Ptr2, B), Len}, B, TLI);
}
Value *llvm::emitBCmp(Value *Ptr1, Value *Ptr2, Value *Len, IRBuilderBase &B,
const DataLayout &DL, const TargetLibraryInfo *TLI) {
LLVMContext &Context = B.GetInsertBlock()->getContext();
return emitLibCall(
LibFunc_bcmp, B.getInt32Ty(),
{B.getInt8PtrTy(), B.getInt8PtrTy(), DL.getIntPtrType(Context)},
{castToCStr(Ptr1, B), castToCStr(Ptr2, B), Len}, B, TLI);
}
Value *llvm::emitMemCCpy(Value *Ptr1, Value *Ptr2, Value *Val, Value *Len,
IRBuilderBase &B, const TargetLibraryInfo *TLI) {
return emitLibCall(
LibFunc_memccpy, B.getInt8PtrTy(),
{B.getInt8PtrTy(), B.getInt8PtrTy(), B.getInt32Ty(), Len->getType()},
{Ptr1, Ptr2, Val, Len}, B, TLI);
}
Value *llvm::emitSNPrintf(Value *Dest, Value *Size, Value *Fmt,
ArrayRef<Value *> VariadicArgs, IRBuilderBase &B,
const TargetLibraryInfo *TLI) {
SmallVector<Value *, 8> Args{castToCStr(Dest, B), Size, castToCStr(Fmt, B)};
llvm::append_range(Args, VariadicArgs);
return emitLibCall(LibFunc_snprintf, B.getInt32Ty(),
{B.getInt8PtrTy(), Size->getType(), B.getInt8PtrTy()},
Args, B, TLI, /*IsVaArgs=*/true);
}
Value *llvm::emitSPrintf(Value *Dest, Value *Fmt,
ArrayRef<Value *> VariadicArgs, IRBuilderBase &B,
const TargetLibraryInfo *TLI) {
SmallVector<Value *, 8> Args{castToCStr(Dest, B), castToCStr(Fmt, B)};
llvm::append_range(Args, VariadicArgs);
return emitLibCall(LibFunc_sprintf, B.getInt32Ty(),
{B.getInt8PtrTy(), B.getInt8PtrTy()}, Args, B, TLI,
/*IsVaArgs=*/true);
}
Value *llvm::emitStrCat(Value *Dest, Value *Src, IRBuilderBase &B,
const TargetLibraryInfo *TLI) {
return emitLibCall(LibFunc_strcat, B.getInt8PtrTy(),
{B.getInt8PtrTy(), B.getInt8PtrTy()},
{castToCStr(Dest, B), castToCStr(Src, B)}, B, TLI);
}
Value *llvm::emitStrLCpy(Value *Dest, Value *Src, Value *Size, IRBuilderBase &B,
const TargetLibraryInfo *TLI) {
return emitLibCall(LibFunc_strlcpy, Size->getType(),
{B.getInt8PtrTy(), B.getInt8PtrTy(), Size->getType()},
{castToCStr(Dest, B), castToCStr(Src, B), Size}, B, TLI);
}
Value *llvm::emitStrLCat(Value *Dest, Value *Src, Value *Size, IRBuilderBase &B,
const TargetLibraryInfo *TLI) {
return emitLibCall(LibFunc_strlcat, Size->getType(),
{B.getInt8PtrTy(), B.getInt8PtrTy(), Size->getType()},
{castToCStr(Dest, B), castToCStr(Src, B), Size}, B, TLI);
}
Value *llvm::emitStrNCat(Value *Dest, Value *Src, Value *Size, IRBuilderBase &B,
const TargetLibraryInfo *TLI) {
return emitLibCall(LibFunc_strncat, B.getInt8PtrTy(),
{B.getInt8PtrTy(), B.getInt8PtrTy(), Size->getType()},
{castToCStr(Dest, B), castToCStr(Src, B), Size}, B, TLI);
}
Value *llvm::emitVSNPrintf(Value *Dest, Value *Size, Value *Fmt, Value *VAList,
IRBuilderBase &B, const TargetLibraryInfo *TLI) {
return emitLibCall(
LibFunc_vsnprintf, B.getInt32Ty(),
{B.getInt8PtrTy(), Size->getType(), B.getInt8PtrTy(), VAList->getType()},
{castToCStr(Dest, B), Size, castToCStr(Fmt, B), VAList}, B, TLI);
}
Value *llvm::emitVSPrintf(Value *Dest, Value *Fmt, Value *VAList,
IRBuilderBase &B, const TargetLibraryInfo *TLI) {
return emitLibCall(LibFunc_vsprintf, B.getInt32Ty(),
{B.getInt8PtrTy(), B.getInt8PtrTy(), VAList->getType()},
{castToCStr(Dest, B), castToCStr(Fmt, B), VAList}, B, TLI);
}
/// Append a suffix to the function name according to the type of 'Op'.
static void appendTypeSuffix(Value *Op, StringRef &Name,
SmallString<20> &NameBuffer) {
if (!Op->getType()->isDoubleTy()) {
NameBuffer += Name;
if (Op->getType()->isFloatTy())
NameBuffer += 'f';
else
NameBuffer += 'l';
Name = NameBuffer;
}
}
static Value *emitUnaryFloatFnCallHelper(Value *Op, StringRef Name,
IRBuilderBase &B,
const AttributeList &Attrs) {
assert((Name != "") && "Must specify Name to emitUnaryFloatFnCall");
Module *M = B.GetInsertBlock()->getModule();
FunctionCallee Callee =
M->getOrInsertFunction(Name, Op->getType(), Op->getType());
CallInst *CI = B.CreateCall(Callee, Op, Name);
// The incoming attribute set may have come from a speculatable intrinsic, but
// is being replaced with a library call which is not allowed to be
// speculatable.
CI->setAttributes(Attrs.removeAttribute(B.getContext(),
AttributeList::FunctionIndex,
Attribute::Speculatable));
if (const Function *F =
dyn_cast<Function>(Callee.getCallee()->stripPointerCasts()))
CI->setCallingConv(F->getCallingConv());
return CI;
}
Value *llvm::emitUnaryFloatFnCall(Value *Op, StringRef Name, IRBuilderBase &B,
const AttributeList &Attrs) {
SmallString<20> NameBuffer;
appendTypeSuffix(Op, Name, NameBuffer);
return emitUnaryFloatFnCallHelper(Op, Name, B, Attrs);
}
Value *llvm::emitUnaryFloatFnCall(Value *Op, const TargetLibraryInfo *TLI,
LibFunc DoubleFn, LibFunc FloatFn,
LibFunc LongDoubleFn, IRBuilderBase &B,
const AttributeList &Attrs) {
// Get the name of the function according to TLI.
StringRef Name = getFloatFnName(TLI, Op->getType(),
DoubleFn, FloatFn, LongDoubleFn);
return emitUnaryFloatFnCallHelper(Op, Name, B, Attrs);
}
static Value *emitBinaryFloatFnCallHelper(Value *Op1, Value *Op2,
StringRef Name, IRBuilderBase &B,
const AttributeList &Attrs,
const TargetLibraryInfo *TLI = nullptr) {
assert((Name != "") && "Must specify Name to emitBinaryFloatFnCall");
Module *M = B.GetInsertBlock()->getModule();
FunctionCallee Callee = M->getOrInsertFunction(Name, Op1->getType(),
Op1->getType(), Op2->getType());
if (TLI != nullptr)
inferLibFuncAttributes(M, Name, *TLI);
CallInst *CI = B.CreateCall(Callee, { Op1, Op2 }, Name);
// The incoming attribute set may have come from a speculatable intrinsic, but
// is being replaced with a library call which is not allowed to be
// speculatable.
CI->setAttributes(Attrs.removeAttribute(B.getContext(),
AttributeList::FunctionIndex,
Attribute::Speculatable));
if (const Function *F =
dyn_cast<Function>(Callee.getCallee()->stripPointerCasts()))
CI->setCallingConv(F->getCallingConv());
return CI;
}
Value *llvm::emitBinaryFloatFnCall(Value *Op1, Value *Op2, StringRef Name,
IRBuilderBase &B,
const AttributeList &Attrs) {
assert((Name != "") && "Must specify Name to emitBinaryFloatFnCall");
SmallString<20> NameBuffer;
appendTypeSuffix(Op1, Name, NameBuffer);
return emitBinaryFloatFnCallHelper(Op1, Op2, Name, B, Attrs);
}
Value *llvm::emitBinaryFloatFnCall(Value *Op1, Value *Op2,
const TargetLibraryInfo *TLI,
LibFunc DoubleFn, LibFunc FloatFn,
LibFunc LongDoubleFn, IRBuilderBase &B,
const AttributeList &Attrs) {
// Get the name of the function according to TLI.
StringRef Name = getFloatFnName(TLI, Op1->getType(),
DoubleFn, FloatFn, LongDoubleFn);
return emitBinaryFloatFnCallHelper(Op1, Op2, Name, B, Attrs, TLI);
}
Value *llvm::emitPutChar(Value *Char, IRBuilderBase &B,
const TargetLibraryInfo *TLI) {
if (!TLI->has(LibFunc_putchar))
return nullptr;
Module *M = B.GetInsertBlock()->getModule();
StringRef PutCharName = TLI->getName(LibFunc_putchar);
FunctionCallee PutChar =
M->getOrInsertFunction(PutCharName, B.getInt32Ty(), B.getInt32Ty());
inferLibFuncAttributes(M, PutCharName, *TLI);
CallInst *CI = B.CreateCall(PutChar,
B.CreateIntCast(Char,
B.getInt32Ty(),
/*isSigned*/true,
"chari"),
PutCharName);
if (const Function *F =
dyn_cast<Function>(PutChar.getCallee()->stripPointerCasts()))
CI->setCallingConv(F->getCallingConv());
return CI;
}
Value *llvm::emitPutS(Value *Str, IRBuilderBase &B,
const TargetLibraryInfo *TLI) {
if (!TLI->has(LibFunc_puts))
return nullptr;
Module *M = B.GetInsertBlock()->getModule();
StringRef PutsName = TLI->getName(LibFunc_puts);
FunctionCallee PutS =
M->getOrInsertFunction(PutsName, B.getInt32Ty(), B.getInt8PtrTy());
inferLibFuncAttributes(M, PutsName, *TLI);
CallInst *CI = B.CreateCall(PutS, castToCStr(Str, B), PutsName);
if (const Function *F =
dyn_cast<Function>(PutS.getCallee()->stripPointerCasts()))
CI->setCallingConv(F->getCallingConv());
return CI;
}
Value *llvm::emitFPutC(Value *Char, Value *File, IRBuilderBase &B,
const TargetLibraryInfo *TLI) {
if (!TLI->has(LibFunc_fputc))
return nullptr;
Module *M = B.GetInsertBlock()->getModule();
StringRef FPutcName = TLI->getName(LibFunc_fputc);
FunctionCallee F = M->getOrInsertFunction(FPutcName, B.getInt32Ty(),
B.getInt32Ty(), File->getType());
if (File->getType()->isPointerTy())
inferLibFuncAttributes(M, FPutcName, *TLI);
Char = B.CreateIntCast(Char, B.getInt32Ty(), /*isSigned*/true,
"chari");
CallInst *CI = B.CreateCall(F, {Char, File}, FPutcName);
if (const Function *Fn =
dyn_cast<Function>(F.getCallee()->stripPointerCasts()))
CI->setCallingConv(Fn->getCallingConv());
return CI;
}
Value *llvm::emitFPutS(Value *Str, Value *File, IRBuilderBase &B,
const TargetLibraryInfo *TLI) {
if (!TLI->has(LibFunc_fputs))
return nullptr;
Module *M = B.GetInsertBlock()->getModule();
StringRef FPutsName = TLI->getName(LibFunc_fputs);
FunctionCallee F = M->getOrInsertFunction(FPutsName, B.getInt32Ty(),
B.getInt8PtrTy(), File->getType());
if (File->getType()->isPointerTy())
inferLibFuncAttributes(M, FPutsName, *TLI);
CallInst *CI = B.CreateCall(F, {castToCStr(Str, B), File}, FPutsName);
if (const Function *Fn =
dyn_cast<Function>(F.getCallee()->stripPointerCasts()))
CI->setCallingConv(Fn->getCallingConv());
return CI;
}
Value *llvm::emitFWrite(Value *Ptr, Value *Size, Value *File, IRBuilderBase &B,
const DataLayout &DL, const TargetLibraryInfo *TLI) {
if (!TLI->has(LibFunc_fwrite))
return nullptr;
Module *M = B.GetInsertBlock()->getModule();
LLVMContext &Context = B.GetInsertBlock()->getContext();
StringRef FWriteName = TLI->getName(LibFunc_fwrite);
FunctionCallee F = M->getOrInsertFunction(
FWriteName, DL.getIntPtrType(Context), B.getInt8PtrTy(),
DL.getIntPtrType(Context), DL.getIntPtrType(Context), File->getType());
if (File->getType()->isPointerTy())
inferLibFuncAttributes(M, FWriteName, *TLI);
CallInst *CI =
B.CreateCall(F, {castToCStr(Ptr, B), Size,
ConstantInt::get(DL.getIntPtrType(Context), 1), File});
if (const Function *Fn =
dyn_cast<Function>(F.getCallee()->stripPointerCasts()))
CI->setCallingConv(Fn->getCallingConv());
return CI;
}
Value *llvm::emitMalloc(Value *Num, IRBuilderBase &B, const DataLayout &DL,
const TargetLibraryInfo *TLI) {
if (!TLI->has(LibFunc_malloc))
return nullptr;
Module *M = B.GetInsertBlock()->getModule();
StringRef MallocName = TLI->getName(LibFunc_malloc);
LLVMContext &Context = B.GetInsertBlock()->getContext();
FunctionCallee Malloc = M->getOrInsertFunction(MallocName, B.getInt8PtrTy(),
DL.getIntPtrType(Context));
inferLibFuncAttributes(M, MallocName, *TLI);
CallInst *CI = B.CreateCall(Malloc, Num, MallocName);
if (const Function *F =
dyn_cast<Function>(Malloc.getCallee()->stripPointerCasts()))
CI->setCallingConv(F->getCallingConv());
return CI;
}
Value *llvm::emitCalloc(Value *Num, Value *Size, const AttributeList &Attrs,
IRBuilderBase &B, const TargetLibraryInfo &TLI) {
if (!TLI.has(LibFunc_calloc))
return nullptr;
Module *M = B.GetInsertBlock()->getModule();
StringRef CallocName = TLI.getName(LibFunc_calloc);
const DataLayout &DL = M->getDataLayout();
IntegerType *PtrType = DL.getIntPtrType((B.GetInsertBlock()->getContext()));
FunctionCallee Calloc = M->getOrInsertFunction(
CallocName, Attrs, B.getInt8PtrTy(), PtrType, PtrType);
inferLibFuncAttributes(M, CallocName, TLI);
CallInst *CI = B.CreateCall(Calloc, {Num, Size}, CallocName);
if (const auto *F =
dyn_cast<Function>(Calloc.getCallee()->stripPointerCasts()))
CI->setCallingConv(F->getCallingConv());
return CI;
}
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