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1008 lines
33 KiB
1008 lines
33 KiB
//===- BuildLibCalls.cpp - Utility builder for libcalls -------------------===//
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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 implements some functions that will create standard C libcalls.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Transforms/Utils/BuildLibCalls.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/ADT/Statistic.h"
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#include "llvm/Analysis/TargetLibraryInfo.h"
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#include "llvm/IR/Constants.h"
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#include "llvm/IR/DataLayout.h"
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#include "llvm/IR/Function.h"
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#include "llvm/IR/IRBuilder.h"
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#include "llvm/IR/Intrinsics.h"
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#include "llvm/IR/LLVMContext.h"
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#include "llvm/IR/Module.h"
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#include "llvm/IR/Type.h"
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using namespace llvm;
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#define DEBUG_TYPE "build-libcalls"
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//- Infer Attributes ---------------------------------------------------------//
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STATISTIC(NumReadNone, "Number of functions inferred as readnone");
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STATISTIC(NumReadOnly, "Number of functions inferred as readonly");
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STATISTIC(NumArgMemOnly, "Number of functions inferred as argmemonly");
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STATISTIC(NumNoUnwind, "Number of functions inferred as nounwind");
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STATISTIC(NumNoCapture, "Number of arguments inferred as nocapture");
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STATISTIC(NumReadOnlyArg, "Number of arguments inferred as readonly");
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STATISTIC(NumNoAlias, "Number of function returns inferred as noalias");
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STATISTIC(NumNonNull, "Number of function returns inferred as nonnull returns");
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static bool setDoesNotAccessMemory(Function &F) {
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if (F.doesNotAccessMemory())
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return false;
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F.setDoesNotAccessMemory();
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++NumReadNone;
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return true;
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}
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static bool setOnlyReadsMemory(Function &F) {
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if (F.onlyReadsMemory())
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return false;
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F.setOnlyReadsMemory();
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++NumReadOnly;
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return true;
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}
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static bool setOnlyAccessesArgMemory(Function &F) {
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if (F.onlyAccessesArgMemory())
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return false;
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F.setOnlyAccessesArgMemory ();
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++NumArgMemOnly;
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return true;
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}
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static bool setDoesNotThrow(Function &F) {
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if (F.doesNotThrow())
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return false;
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F.setDoesNotThrow();
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++NumNoUnwind;
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return true;
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}
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static bool setDoesNotCapture(Function &F, unsigned n) {
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if (F.doesNotCapture(n))
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return false;
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F.setDoesNotCapture(n);
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++NumNoCapture;
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return true;
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}
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static bool setOnlyReadsMemory(Function &F, unsigned n) {
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if (F.onlyReadsMemory(n))
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return false;
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F.setOnlyReadsMemory(n);
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++NumReadOnlyArg;
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return true;
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}
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static bool setDoesNotAlias(Function &F, unsigned n) {
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if (F.doesNotAlias(n))
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return false;
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F.setDoesNotAlias(n);
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++NumNoAlias;
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return true;
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}
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static bool setNonNull(Function &F, unsigned n) {
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assert((n != AttributeSet::ReturnIndex ||
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F.getReturnType()->isPointerTy()) &&
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"nonnull applies only to pointers");
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if (F.getAttributes().hasAttribute(n, Attribute::NonNull))
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return false;
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F.addAttribute(n, Attribute::NonNull);
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++NumNonNull;
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return true;
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}
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bool llvm::inferLibFuncAttributes(Function &F, const TargetLibraryInfo &TLI) {
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LibFunc::Func TheLibFunc;
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if (!(TLI.getLibFunc(F, TheLibFunc) && TLI.has(TheLibFunc)))
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return false;
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bool Changed = false;
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switch (TheLibFunc) {
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case LibFunc::strlen:
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Changed |= setOnlyReadsMemory(F);
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotCapture(F, 1);
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return Changed;
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case LibFunc::strchr:
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case LibFunc::strrchr:
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Changed |= setOnlyReadsMemory(F);
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Changed |= setDoesNotThrow(F);
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return Changed;
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case LibFunc::strtol:
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case LibFunc::strtod:
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case LibFunc::strtof:
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case LibFunc::strtoul:
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case LibFunc::strtoll:
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case LibFunc::strtold:
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case LibFunc::strtoull:
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotCapture(F, 2);
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Changed |= setOnlyReadsMemory(F, 1);
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return Changed;
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case LibFunc::strcpy:
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case LibFunc::stpcpy:
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case LibFunc::strcat:
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case LibFunc::strncat:
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case LibFunc::strncpy:
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case LibFunc::stpncpy:
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotCapture(F, 2);
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Changed |= setOnlyReadsMemory(F, 2);
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return Changed;
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case LibFunc::strxfrm:
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotCapture(F, 1);
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Changed |= setDoesNotCapture(F, 2);
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Changed |= setOnlyReadsMemory(F, 2);
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return Changed;
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case LibFunc::strcmp: // 0,1
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case LibFunc::strspn: // 0,1
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case LibFunc::strncmp: // 0,1
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case LibFunc::strcspn: // 0,1
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case LibFunc::strcoll: // 0,1
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case LibFunc::strcasecmp: // 0,1
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case LibFunc::strncasecmp: //
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Changed |= setOnlyReadsMemory(F);
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotCapture(F, 1);
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Changed |= setDoesNotCapture(F, 2);
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return Changed;
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case LibFunc::strstr:
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case LibFunc::strpbrk:
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Changed |= setOnlyReadsMemory(F);
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotCapture(F, 2);
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return Changed;
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case LibFunc::strtok:
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case LibFunc::strtok_r:
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotCapture(F, 2);
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Changed |= setOnlyReadsMemory(F, 2);
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return Changed;
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case LibFunc::scanf:
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotCapture(F, 1);
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Changed |= setOnlyReadsMemory(F, 1);
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return Changed;
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case LibFunc::setbuf:
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case LibFunc::setvbuf:
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotCapture(F, 1);
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return Changed;
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case LibFunc::strdup:
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case LibFunc::strndup:
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotAlias(F, 0);
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Changed |= setDoesNotCapture(F, 1);
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Changed |= setOnlyReadsMemory(F, 1);
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return Changed;
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case LibFunc::stat:
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case LibFunc::statvfs:
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotCapture(F, 1);
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Changed |= setDoesNotCapture(F, 2);
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Changed |= setOnlyReadsMemory(F, 1);
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return Changed;
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case LibFunc::sscanf:
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotCapture(F, 1);
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Changed |= setDoesNotCapture(F, 2);
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Changed |= setOnlyReadsMemory(F, 1);
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Changed |= setOnlyReadsMemory(F, 2);
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return Changed;
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case LibFunc::sprintf:
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotCapture(F, 1);
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Changed |= setDoesNotCapture(F, 2);
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Changed |= setOnlyReadsMemory(F, 2);
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return Changed;
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case LibFunc::snprintf:
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotCapture(F, 1);
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Changed |= setDoesNotCapture(F, 3);
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Changed |= setOnlyReadsMemory(F, 3);
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return Changed;
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case LibFunc::setitimer:
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotCapture(F, 2);
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Changed |= setDoesNotCapture(F, 3);
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Changed |= setOnlyReadsMemory(F, 2);
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return Changed;
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case LibFunc::system:
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// May throw; "system" is a valid pthread cancellation point.
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Changed |= setDoesNotCapture(F, 1);
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Changed |= setOnlyReadsMemory(F, 1);
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return Changed;
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case LibFunc::malloc:
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotAlias(F, 0);
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return Changed;
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case LibFunc::memcmp:
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Changed |= setOnlyReadsMemory(F);
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotCapture(F, 1);
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Changed |= setDoesNotCapture(F, 2);
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return Changed;
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case LibFunc::memchr:
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case LibFunc::memrchr:
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Changed |= setOnlyReadsMemory(F);
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Changed |= setDoesNotThrow(F);
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return Changed;
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case LibFunc::modf:
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case LibFunc::modff:
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case LibFunc::modfl:
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotCapture(F, 2);
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return Changed;
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case LibFunc::memcpy:
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case LibFunc::memccpy:
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case LibFunc::memmove:
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotCapture(F, 2);
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Changed |= setOnlyReadsMemory(F, 2);
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return Changed;
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case LibFunc::memcpy_chk:
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Changed |= setDoesNotThrow(F);
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return Changed;
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case LibFunc::memalign:
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Changed |= setDoesNotAlias(F, 0);
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return Changed;
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case LibFunc::mkdir:
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotCapture(F, 1);
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Changed |= setOnlyReadsMemory(F, 1);
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return Changed;
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case LibFunc::mktime:
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotCapture(F, 1);
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return Changed;
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case LibFunc::realloc:
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotAlias(F, 0);
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Changed |= setDoesNotCapture(F, 1);
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return Changed;
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case LibFunc::read:
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// May throw; "read" is a valid pthread cancellation point.
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Changed |= setDoesNotCapture(F, 2);
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return Changed;
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case LibFunc::rewind:
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotCapture(F, 1);
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return Changed;
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case LibFunc::rmdir:
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case LibFunc::remove:
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case LibFunc::realpath:
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotCapture(F, 1);
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Changed |= setOnlyReadsMemory(F, 1);
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return Changed;
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case LibFunc::rename:
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotCapture(F, 1);
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Changed |= setDoesNotCapture(F, 2);
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Changed |= setOnlyReadsMemory(F, 1);
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Changed |= setOnlyReadsMemory(F, 2);
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return Changed;
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case LibFunc::readlink:
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotCapture(F, 1);
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Changed |= setDoesNotCapture(F, 2);
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Changed |= setOnlyReadsMemory(F, 1);
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return Changed;
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case LibFunc::write:
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// May throw; "write" is a valid pthread cancellation point.
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Changed |= setDoesNotCapture(F, 2);
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Changed |= setOnlyReadsMemory(F, 2);
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return Changed;
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case LibFunc::bcopy:
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotCapture(F, 1);
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Changed |= setDoesNotCapture(F, 2);
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Changed |= setOnlyReadsMemory(F, 1);
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return Changed;
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case LibFunc::bcmp:
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Changed |= setDoesNotThrow(F);
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Changed |= setOnlyReadsMemory(F);
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Changed |= setDoesNotCapture(F, 1);
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Changed |= setDoesNotCapture(F, 2);
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return Changed;
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case LibFunc::bzero:
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotCapture(F, 1);
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return Changed;
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case LibFunc::calloc:
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotAlias(F, 0);
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return Changed;
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case LibFunc::chmod:
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case LibFunc::chown:
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotCapture(F, 1);
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Changed |= setOnlyReadsMemory(F, 1);
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return Changed;
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case LibFunc::ctermid:
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case LibFunc::clearerr:
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case LibFunc::closedir:
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotCapture(F, 1);
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return Changed;
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case LibFunc::atoi:
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case LibFunc::atol:
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case LibFunc::atof:
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case LibFunc::atoll:
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Changed |= setDoesNotThrow(F);
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Changed |= setOnlyReadsMemory(F);
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Changed |= setDoesNotCapture(F, 1);
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return Changed;
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case LibFunc::access:
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotCapture(F, 1);
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Changed |= setOnlyReadsMemory(F, 1);
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return Changed;
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case LibFunc::fopen:
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotAlias(F, 0);
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Changed |= setDoesNotCapture(F, 1);
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Changed |= setDoesNotCapture(F, 2);
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Changed |= setOnlyReadsMemory(F, 1);
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Changed |= setOnlyReadsMemory(F, 2);
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return Changed;
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case LibFunc::fdopen:
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotAlias(F, 0);
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Changed |= setDoesNotCapture(F, 2);
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Changed |= setOnlyReadsMemory(F, 2);
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return Changed;
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case LibFunc::feof:
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case LibFunc::free:
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case LibFunc::fseek:
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case LibFunc::ftell:
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case LibFunc::fgetc:
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case LibFunc::fseeko:
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case LibFunc::ftello:
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case LibFunc::fileno:
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case LibFunc::fflush:
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case LibFunc::fclose:
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case LibFunc::fsetpos:
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case LibFunc::flockfile:
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case LibFunc::funlockfile:
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case LibFunc::ftrylockfile:
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotCapture(F, 1);
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return Changed;
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case LibFunc::ferror:
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotCapture(F, 1);
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Changed |= setOnlyReadsMemory(F);
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return Changed;
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case LibFunc::fputc:
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case LibFunc::fstat:
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case LibFunc::frexp:
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case LibFunc::frexpf:
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case LibFunc::frexpl:
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case LibFunc::fstatvfs:
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotCapture(F, 2);
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return Changed;
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case LibFunc::fgets:
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotCapture(F, 3);
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return Changed;
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case LibFunc::fread:
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotCapture(F, 1);
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Changed |= setDoesNotCapture(F, 4);
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return Changed;
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case LibFunc::fwrite:
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotCapture(F, 1);
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Changed |= setDoesNotCapture(F, 4);
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// FIXME: readonly #1?
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return Changed;
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case LibFunc::fputs:
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotCapture(F, 1);
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Changed |= setDoesNotCapture(F, 2);
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Changed |= setOnlyReadsMemory(F, 1);
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return Changed;
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case LibFunc::fscanf:
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case LibFunc::fprintf:
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotCapture(F, 1);
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Changed |= setDoesNotCapture(F, 2);
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Changed |= setOnlyReadsMemory(F, 2);
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return Changed;
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case LibFunc::fgetpos:
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotCapture(F, 1);
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Changed |= setDoesNotCapture(F, 2);
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return Changed;
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case LibFunc::getc:
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case LibFunc::getlogin_r:
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case LibFunc::getc_unlocked:
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotCapture(F, 1);
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return Changed;
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case LibFunc::getenv:
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Changed |= setDoesNotThrow(F);
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Changed |= setOnlyReadsMemory(F);
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Changed |= setDoesNotCapture(F, 1);
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return Changed;
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case LibFunc::gets:
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case LibFunc::getchar:
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Changed |= setDoesNotThrow(F);
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return Changed;
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case LibFunc::getitimer:
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotCapture(F, 2);
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return Changed;
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case LibFunc::getpwnam:
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotCapture(F, 1);
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Changed |= setOnlyReadsMemory(F, 1);
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return Changed;
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case LibFunc::ungetc:
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotCapture(F, 2);
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return Changed;
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case LibFunc::uname:
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotCapture(F, 1);
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return Changed;
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case LibFunc::unlink:
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotCapture(F, 1);
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Changed |= setOnlyReadsMemory(F, 1);
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return Changed;
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case LibFunc::unsetenv:
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotCapture(F, 1);
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Changed |= setOnlyReadsMemory(F, 1);
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return Changed;
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case LibFunc::utime:
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case LibFunc::utimes:
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotCapture(F, 1);
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Changed |= setDoesNotCapture(F, 2);
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Changed |= setOnlyReadsMemory(F, 1);
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Changed |= setOnlyReadsMemory(F, 2);
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return Changed;
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case LibFunc::putc:
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotCapture(F, 2);
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return Changed;
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case LibFunc::puts:
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case LibFunc::printf:
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case LibFunc::perror:
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Changed |= setDoesNotThrow(F);
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Changed |= setDoesNotCapture(F, 1);
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Changed |= setOnlyReadsMemory(F, 1);
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return Changed;
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case LibFunc::pread:
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// May throw; "pread" is a valid pthread cancellation point.
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Changed |= setDoesNotCapture(F, 2);
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return Changed;
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case LibFunc::pwrite:
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// May throw; "pwrite" is a valid pthread cancellation point.
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|
Changed |= setDoesNotCapture(F, 2);
|
|
Changed |= setOnlyReadsMemory(F, 2);
|
|
return Changed;
|
|
case LibFunc::putchar:
|
|
Changed |= setDoesNotThrow(F);
|
|
return Changed;
|
|
case LibFunc::popen:
|
|
Changed |= setDoesNotThrow(F);
|
|
Changed |= setDoesNotAlias(F, 0);
|
|
Changed |= setDoesNotCapture(F, 1);
|
|
Changed |= setDoesNotCapture(F, 2);
|
|
Changed |= setOnlyReadsMemory(F, 1);
|
|
Changed |= setOnlyReadsMemory(F, 2);
|
|
return Changed;
|
|
case LibFunc::pclose:
|
|
Changed |= setDoesNotThrow(F);
|
|
Changed |= setDoesNotCapture(F, 1);
|
|
return Changed;
|
|
case LibFunc::vscanf:
|
|
Changed |= setDoesNotThrow(F);
|
|
Changed |= setDoesNotCapture(F, 1);
|
|
Changed |= setOnlyReadsMemory(F, 1);
|
|
return Changed;
|
|
case LibFunc::vsscanf:
|
|
Changed |= setDoesNotThrow(F);
|
|
Changed |= setDoesNotCapture(F, 1);
|
|
Changed |= setDoesNotCapture(F, 2);
|
|
Changed |= setOnlyReadsMemory(F, 1);
|
|
Changed |= setOnlyReadsMemory(F, 2);
|
|
return Changed;
|
|
case LibFunc::vfscanf:
|
|
Changed |= setDoesNotThrow(F);
|
|
Changed |= setDoesNotCapture(F, 1);
|
|
Changed |= setDoesNotCapture(F, 2);
|
|
Changed |= setOnlyReadsMemory(F, 2);
|
|
return Changed;
|
|
case LibFunc::valloc:
|
|
Changed |= setDoesNotThrow(F);
|
|
Changed |= setDoesNotAlias(F, 0);
|
|
return Changed;
|
|
case LibFunc::vprintf:
|
|
Changed |= setDoesNotThrow(F);
|
|
Changed |= setDoesNotCapture(F, 1);
|
|
Changed |= setOnlyReadsMemory(F, 1);
|
|
return Changed;
|
|
case LibFunc::vfprintf:
|
|
case LibFunc::vsprintf:
|
|
Changed |= setDoesNotThrow(F);
|
|
Changed |= setDoesNotCapture(F, 1);
|
|
Changed |= setDoesNotCapture(F, 2);
|
|
Changed |= setOnlyReadsMemory(F, 2);
|
|
return Changed;
|
|
case LibFunc::vsnprintf:
|
|
Changed |= setDoesNotThrow(F);
|
|
Changed |= setDoesNotCapture(F, 1);
|
|
Changed |= setDoesNotCapture(F, 3);
|
|
Changed |= setOnlyReadsMemory(F, 3);
|
|
return Changed;
|
|
case LibFunc::open:
|
|
// May throw; "open" is a valid pthread cancellation point.
|
|
Changed |= setDoesNotCapture(F, 1);
|
|
Changed |= setOnlyReadsMemory(F, 1);
|
|
return Changed;
|
|
case LibFunc::opendir:
|
|
Changed |= setDoesNotThrow(F);
|
|
Changed |= setDoesNotAlias(F, 0);
|
|
Changed |= setDoesNotCapture(F, 1);
|
|
Changed |= setOnlyReadsMemory(F, 1);
|
|
return Changed;
|
|
case LibFunc::tmpfile:
|
|
Changed |= setDoesNotThrow(F);
|
|
Changed |= setDoesNotAlias(F, 0);
|
|
return Changed;
|
|
case LibFunc::times:
|
|
Changed |= setDoesNotThrow(F);
|
|
Changed |= setDoesNotCapture(F, 1);
|
|
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 |= setDoesNotThrow(F);
|
|
Changed |= setDoesNotCapture(F, 1);
|
|
Changed |= setDoesNotCapture(F, 2);
|
|
Changed |= setOnlyReadsMemory(F, 1);
|
|
return Changed;
|
|
case LibFunc::lchown:
|
|
Changed |= setDoesNotThrow(F);
|
|
Changed |= setDoesNotCapture(F, 1);
|
|
Changed |= setOnlyReadsMemory(F, 1);
|
|
return Changed;
|
|
case LibFunc::qsort:
|
|
// May throw; places call through function pointer.
|
|
Changed |= setDoesNotCapture(F, 4);
|
|
return Changed;
|
|
case LibFunc::dunder_strdup:
|
|
case LibFunc::dunder_strndup:
|
|
Changed |= setDoesNotThrow(F);
|
|
Changed |= setDoesNotAlias(F, 0);
|
|
Changed |= setDoesNotCapture(F, 1);
|
|
Changed |= setOnlyReadsMemory(F, 1);
|
|
return Changed;
|
|
case LibFunc::dunder_strtok_r:
|
|
Changed |= setDoesNotThrow(F);
|
|
Changed |= setDoesNotCapture(F, 2);
|
|
Changed |= setOnlyReadsMemory(F, 2);
|
|
return Changed;
|
|
case LibFunc::under_IO_getc:
|
|
Changed |= setDoesNotThrow(F);
|
|
Changed |= setDoesNotCapture(F, 1);
|
|
return Changed;
|
|
case LibFunc::under_IO_putc:
|
|
Changed |= setDoesNotThrow(F);
|
|
Changed |= setDoesNotCapture(F, 2);
|
|
return Changed;
|
|
case LibFunc::dunder_isoc99_scanf:
|
|
Changed |= setDoesNotThrow(F);
|
|
Changed |= setDoesNotCapture(F, 1);
|
|
Changed |= setOnlyReadsMemory(F, 1);
|
|
return Changed;
|
|
case LibFunc::stat64:
|
|
case LibFunc::lstat64:
|
|
case LibFunc::statvfs64:
|
|
Changed |= setDoesNotThrow(F);
|
|
Changed |= setDoesNotCapture(F, 1);
|
|
Changed |= setDoesNotCapture(F, 2);
|
|
Changed |= setOnlyReadsMemory(F, 1);
|
|
return Changed;
|
|
case LibFunc::dunder_isoc99_sscanf:
|
|
Changed |= setDoesNotThrow(F);
|
|
Changed |= setDoesNotCapture(F, 1);
|
|
Changed |= setDoesNotCapture(F, 2);
|
|
Changed |= setOnlyReadsMemory(F, 1);
|
|
Changed |= setOnlyReadsMemory(F, 2);
|
|
return Changed;
|
|
case LibFunc::fopen64:
|
|
Changed |= setDoesNotThrow(F);
|
|
Changed |= setDoesNotAlias(F, 0);
|
|
Changed |= setDoesNotCapture(F, 1);
|
|
Changed |= setDoesNotCapture(F, 2);
|
|
Changed |= setOnlyReadsMemory(F, 1);
|
|
Changed |= setOnlyReadsMemory(F, 2);
|
|
return Changed;
|
|
case LibFunc::fseeko64:
|
|
case LibFunc::ftello64:
|
|
Changed |= setDoesNotThrow(F);
|
|
Changed |= setDoesNotCapture(F, 1);
|
|
return Changed;
|
|
case LibFunc::tmpfile64:
|
|
Changed |= setDoesNotThrow(F);
|
|
Changed |= setDoesNotAlias(F, 0);
|
|
return Changed;
|
|
case LibFunc::fstat64:
|
|
case LibFunc::fstatvfs64:
|
|
Changed |= setDoesNotThrow(F);
|
|
Changed |= setDoesNotCapture(F, 2);
|
|
return Changed;
|
|
case LibFunc::open64:
|
|
// May throw; "open" is a valid pthread cancellation point.
|
|
Changed |= setDoesNotCapture(F, 1);
|
|
Changed |= setOnlyReadsMemory(F, 1);
|
|
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 |= setDoesNotThrow(F);
|
|
Changed |= setDoesNotCapture(F, 1);
|
|
Changed |= setDoesNotCapture(F, 2);
|
|
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)
|
|
// Operator new always returns a nonnull noalias pointer
|
|
Changed |= setNonNull(F, AttributeSet::ReturnIndex);
|
|
Changed |= setDoesNotAlias(F, AttributeSet::ReturnIndex);
|
|
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, 1);
|
|
Changed |= setDoesNotCapture(F, 2);
|
|
Changed |= setOnlyReadsMemory(F, 2);
|
|
return Changed;
|
|
// int __nvvm_reflect(const char *)
|
|
case LibFunc::nvvm_reflect:
|
|
Changed |= setDoesNotAccessMemory(F);
|
|
Changed |= setDoesNotThrow(F);
|
|
return Changed;
|
|
|
|
default:
|
|
// FIXME: It'd be really nice to cover all the library functions we're
|
|
// aware of here.
|
|
return false;
|
|
}
|
|
}
|
|
|
|
//- Emit LibCalls ------------------------------------------------------------//
|
|
|
|
Value *llvm::castToCStr(Value *V, IRBuilder<> &B) {
|
|
unsigned AS = V->getType()->getPointerAddressSpace();
|
|
return B.CreateBitCast(V, B.getInt8PtrTy(AS), "cstr");
|
|
}
|
|
|
|
Value *llvm::emitStrLen(Value *Ptr, IRBuilder<> &B, const DataLayout &DL,
|
|
const TargetLibraryInfo *TLI) {
|
|
if (!TLI->has(LibFunc::strlen))
|
|
return nullptr;
|
|
|
|
Module *M = B.GetInsertBlock()->getModule();
|
|
LLVMContext &Context = B.GetInsertBlock()->getContext();
|
|
Constant *StrLen = M->getOrInsertFunction("strlen", DL.getIntPtrType(Context),
|
|
B.getInt8PtrTy(), nullptr);
|
|
inferLibFuncAttributes(*M->getFunction("strlen"), *TLI);
|
|
CallInst *CI = B.CreateCall(StrLen, castToCStr(Ptr, B), "strlen");
|
|
if (const Function *F = dyn_cast<Function>(StrLen->stripPointerCasts()))
|
|
CI->setCallingConv(F->getCallingConv());
|
|
|
|
return CI;
|
|
}
|
|
|
|
Value *llvm::emitStrChr(Value *Ptr, char C, IRBuilder<> &B,
|
|
const TargetLibraryInfo *TLI) {
|
|
if (!TLI->has(LibFunc::strchr))
|
|
return nullptr;
|
|
|
|
Module *M = B.GetInsertBlock()->getModule();
|
|
Type *I8Ptr = B.getInt8PtrTy();
|
|
Type *I32Ty = B.getInt32Ty();
|
|
Constant *StrChr =
|
|
M->getOrInsertFunction("strchr", I8Ptr, I8Ptr, I32Ty, nullptr);
|
|
inferLibFuncAttributes(*M->getFunction("strchr"), *TLI);
|
|
CallInst *CI = B.CreateCall(
|
|
StrChr, {castToCStr(Ptr, B), ConstantInt::get(I32Ty, C)}, "strchr");
|
|
if (const Function *F = dyn_cast<Function>(StrChr->stripPointerCasts()))
|
|
CI->setCallingConv(F->getCallingConv());
|
|
return CI;
|
|
}
|
|
|
|
Value *llvm::emitStrNCmp(Value *Ptr1, Value *Ptr2, Value *Len, IRBuilder<> &B,
|
|
const DataLayout &DL, const TargetLibraryInfo *TLI) {
|
|
if (!TLI->has(LibFunc::strncmp))
|
|
return nullptr;
|
|
|
|
Module *M = B.GetInsertBlock()->getModule();
|
|
LLVMContext &Context = B.GetInsertBlock()->getContext();
|
|
Value *StrNCmp = M->getOrInsertFunction("strncmp", B.getInt32Ty(),
|
|
B.getInt8PtrTy(), B.getInt8PtrTy(),
|
|
DL.getIntPtrType(Context), nullptr);
|
|
inferLibFuncAttributes(*M->getFunction("strncmp"), *TLI);
|
|
CallInst *CI = B.CreateCall(
|
|
StrNCmp, {castToCStr(Ptr1, B), castToCStr(Ptr2, B), Len}, "strncmp");
|
|
|
|
if (const Function *F = dyn_cast<Function>(StrNCmp->stripPointerCasts()))
|
|
CI->setCallingConv(F->getCallingConv());
|
|
|
|
return CI;
|
|
}
|
|
|
|
Value *llvm::emitStrCpy(Value *Dst, Value *Src, IRBuilder<> &B,
|
|
const TargetLibraryInfo *TLI, StringRef Name) {
|
|
if (!TLI->has(LibFunc::strcpy))
|
|
return nullptr;
|
|
|
|
Module *M = B.GetInsertBlock()->getModule();
|
|
Type *I8Ptr = B.getInt8PtrTy();
|
|
Value *StrCpy = M->getOrInsertFunction(Name, I8Ptr, I8Ptr, I8Ptr, nullptr);
|
|
inferLibFuncAttributes(*M->getFunction(Name), *TLI);
|
|
CallInst *CI =
|
|
B.CreateCall(StrCpy, {castToCStr(Dst, B), castToCStr(Src, B)}, Name);
|
|
if (const Function *F = dyn_cast<Function>(StrCpy->stripPointerCasts()))
|
|
CI->setCallingConv(F->getCallingConv());
|
|
return CI;
|
|
}
|
|
|
|
Value *llvm::emitStrNCpy(Value *Dst, Value *Src, Value *Len, IRBuilder<> &B,
|
|
const TargetLibraryInfo *TLI, StringRef Name) {
|
|
if (!TLI->has(LibFunc::strncpy))
|
|
return nullptr;
|
|
|
|
Module *M = B.GetInsertBlock()->getModule();
|
|
Type *I8Ptr = B.getInt8PtrTy();
|
|
Value *StrNCpy = M->getOrInsertFunction(Name, I8Ptr, I8Ptr, I8Ptr,
|
|
Len->getType(), nullptr);
|
|
inferLibFuncAttributes(*M->getFunction(Name), *TLI);
|
|
CallInst *CI = B.CreateCall(
|
|
StrNCpy, {castToCStr(Dst, B), castToCStr(Src, B), Len}, "strncpy");
|
|
if (const Function *F = dyn_cast<Function>(StrNCpy->stripPointerCasts()))
|
|
CI->setCallingConv(F->getCallingConv());
|
|
return CI;
|
|
}
|
|
|
|
Value *llvm::emitMemCpyChk(Value *Dst, Value *Src, Value *Len, Value *ObjSize,
|
|
IRBuilder<> &B, const DataLayout &DL,
|
|
const TargetLibraryInfo *TLI) {
|
|
if (!TLI->has(LibFunc::memcpy_chk))
|
|
return nullptr;
|
|
|
|
Module *M = B.GetInsertBlock()->getModule();
|
|
AttributeSet AS;
|
|
AS = AttributeSet::get(M->getContext(), AttributeSet::FunctionIndex,
|
|
Attribute::NoUnwind);
|
|
LLVMContext &Context = B.GetInsertBlock()->getContext();
|
|
Value *MemCpy = M->getOrInsertFunction(
|
|
"__memcpy_chk", AttributeSet::get(M->getContext(), AS), B.getInt8PtrTy(),
|
|
B.getInt8PtrTy(), B.getInt8PtrTy(), DL.getIntPtrType(Context),
|
|
DL.getIntPtrType(Context), nullptr);
|
|
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->stripPointerCasts()))
|
|
CI->setCallingConv(F->getCallingConv());
|
|
return CI;
|
|
}
|
|
|
|
Value *llvm::emitMemChr(Value *Ptr, Value *Val, Value *Len, IRBuilder<> &B,
|
|
const DataLayout &DL, const TargetLibraryInfo *TLI) {
|
|
if (!TLI->has(LibFunc::memchr))
|
|
return nullptr;
|
|
|
|
Module *M = B.GetInsertBlock()->getModule();
|
|
LLVMContext &Context = B.GetInsertBlock()->getContext();
|
|
Value *MemChr = M->getOrInsertFunction("memchr", B.getInt8PtrTy(),
|
|
B.getInt8PtrTy(), B.getInt32Ty(),
|
|
DL.getIntPtrType(Context), nullptr);
|
|
inferLibFuncAttributes(*M->getFunction("memchr"), *TLI);
|
|
CallInst *CI = B.CreateCall(MemChr, {castToCStr(Ptr, B), Val, Len}, "memchr");
|
|
|
|
if (const Function *F = dyn_cast<Function>(MemChr->stripPointerCasts()))
|
|
CI->setCallingConv(F->getCallingConv());
|
|
|
|
return CI;
|
|
}
|
|
|
|
Value *llvm::emitMemCmp(Value *Ptr1, Value *Ptr2, Value *Len, IRBuilder<> &B,
|
|
const DataLayout &DL, const TargetLibraryInfo *TLI) {
|
|
if (!TLI->has(LibFunc::memcmp))
|
|
return nullptr;
|
|
|
|
Module *M = B.GetInsertBlock()->getModule();
|
|
LLVMContext &Context = B.GetInsertBlock()->getContext();
|
|
Value *MemCmp = M->getOrInsertFunction("memcmp", B.getInt32Ty(),
|
|
B.getInt8PtrTy(), B.getInt8PtrTy(),
|
|
DL.getIntPtrType(Context), nullptr);
|
|
inferLibFuncAttributes(*M->getFunction("memcmp"), *TLI);
|
|
CallInst *CI = B.CreateCall(
|
|
MemCmp, {castToCStr(Ptr1, B), castToCStr(Ptr2, B), Len}, "memcmp");
|
|
|
|
if (const Function *F = dyn_cast<Function>(MemCmp->stripPointerCasts()))
|
|
CI->setCallingConv(F->getCallingConv());
|
|
|
|
return CI;
|
|
}
|
|
|
|
/// 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;
|
|
}
|
|
}
|
|
|
|
Value *llvm::emitUnaryFloatFnCall(Value *Op, StringRef Name, IRBuilder<> &B,
|
|
const AttributeSet &Attrs) {
|
|
SmallString<20> NameBuffer;
|
|
appendTypeSuffix(Op, Name, NameBuffer);
|
|
|
|
Module *M = B.GetInsertBlock()->getModule();
|
|
Value *Callee = M->getOrInsertFunction(Name, Op->getType(),
|
|
Op->getType(), nullptr);
|
|
CallInst *CI = B.CreateCall(Callee, Op, Name);
|
|
CI->setAttributes(Attrs);
|
|
if (const Function *F = dyn_cast<Function>(Callee->stripPointerCasts()))
|
|
CI->setCallingConv(F->getCallingConv());
|
|
|
|
return CI;
|
|
}
|
|
|
|
Value *llvm::emitBinaryFloatFnCall(Value *Op1, Value *Op2, StringRef Name,
|
|
IRBuilder<> &B, const AttributeSet &Attrs) {
|
|
SmallString<20> NameBuffer;
|
|
appendTypeSuffix(Op1, Name, NameBuffer);
|
|
|
|
Module *M = B.GetInsertBlock()->getModule();
|
|
Value *Callee = M->getOrInsertFunction(Name, Op1->getType(), Op1->getType(),
|
|
Op2->getType(), nullptr);
|
|
CallInst *CI = B.CreateCall(Callee, {Op1, Op2}, Name);
|
|
CI->setAttributes(Attrs);
|
|
if (const Function *F = dyn_cast<Function>(Callee->stripPointerCasts()))
|
|
CI->setCallingConv(F->getCallingConv());
|
|
|
|
return CI;
|
|
}
|
|
|
|
Value *llvm::emitPutChar(Value *Char, IRBuilder<> &B,
|
|
const TargetLibraryInfo *TLI) {
|
|
if (!TLI->has(LibFunc::putchar))
|
|
return nullptr;
|
|
|
|
Module *M = B.GetInsertBlock()->getModule();
|
|
Value *PutChar = M->getOrInsertFunction("putchar", B.getInt32Ty(),
|
|
B.getInt32Ty(), nullptr);
|
|
CallInst *CI = B.CreateCall(PutChar,
|
|
B.CreateIntCast(Char,
|
|
B.getInt32Ty(),
|
|
/*isSigned*/true,
|
|
"chari"),
|
|
"putchar");
|
|
|
|
if (const Function *F = dyn_cast<Function>(PutChar->stripPointerCasts()))
|
|
CI->setCallingConv(F->getCallingConv());
|
|
return CI;
|
|
}
|
|
|
|
Value *llvm::emitPutS(Value *Str, IRBuilder<> &B,
|
|
const TargetLibraryInfo *TLI) {
|
|
if (!TLI->has(LibFunc::puts))
|
|
return nullptr;
|
|
|
|
Module *M = B.GetInsertBlock()->getModule();
|
|
Value *PutS =
|
|
M->getOrInsertFunction("puts", B.getInt32Ty(), B.getInt8PtrTy(), nullptr);
|
|
inferLibFuncAttributes(*M->getFunction("puts"), *TLI);
|
|
CallInst *CI = B.CreateCall(PutS, castToCStr(Str, B), "puts");
|
|
if (const Function *F = dyn_cast<Function>(PutS->stripPointerCasts()))
|
|
CI->setCallingConv(F->getCallingConv());
|
|
return CI;
|
|
}
|
|
|
|
Value *llvm::emitFPutC(Value *Char, Value *File, IRBuilder<> &B,
|
|
const TargetLibraryInfo *TLI) {
|
|
if (!TLI->has(LibFunc::fputc))
|
|
return nullptr;
|
|
|
|
Module *M = B.GetInsertBlock()->getModule();
|
|
Constant *F = M->getOrInsertFunction("fputc", B.getInt32Ty(), B.getInt32Ty(),
|
|
File->getType(), nullptr);
|
|
if (File->getType()->isPointerTy())
|
|
inferLibFuncAttributes(*M->getFunction("fputc"), *TLI);
|
|
Char = B.CreateIntCast(Char, B.getInt32Ty(), /*isSigned*/true,
|
|
"chari");
|
|
CallInst *CI = B.CreateCall(F, {Char, File}, "fputc");
|
|
|
|
if (const Function *Fn = dyn_cast<Function>(F->stripPointerCasts()))
|
|
CI->setCallingConv(Fn->getCallingConv());
|
|
return CI;
|
|
}
|
|
|
|
Value *llvm::emitFPutS(Value *Str, Value *File, IRBuilder<> &B,
|
|
const TargetLibraryInfo *TLI) {
|
|
if (!TLI->has(LibFunc::fputs))
|
|
return nullptr;
|
|
|
|
Module *M = B.GetInsertBlock()->getModule();
|
|
StringRef FPutsName = TLI->getName(LibFunc::fputs);
|
|
Constant *F = M->getOrInsertFunction(
|
|
FPutsName, B.getInt32Ty(), B.getInt8PtrTy(), File->getType(), nullptr);
|
|
if (File->getType()->isPointerTy())
|
|
inferLibFuncAttributes(*M->getFunction(FPutsName), *TLI);
|
|
CallInst *CI = B.CreateCall(F, {castToCStr(Str, B), File}, "fputs");
|
|
|
|
if (const Function *Fn = dyn_cast<Function>(F->stripPointerCasts()))
|
|
CI->setCallingConv(Fn->getCallingConv());
|
|
return CI;
|
|
}
|
|
|
|
Value *llvm::emitFWrite(Value *Ptr, Value *Size, Value *File, IRBuilder<> &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);
|
|
Constant *F = M->getOrInsertFunction(
|
|
FWriteName, DL.getIntPtrType(Context), B.getInt8PtrTy(),
|
|
DL.getIntPtrType(Context), DL.getIntPtrType(Context), File->getType(),
|
|
nullptr);
|
|
if (File->getType()->isPointerTy())
|
|
inferLibFuncAttributes(*M->getFunction(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->stripPointerCasts()))
|
|
CI->setCallingConv(Fn->getCallingConv());
|
|
return CI;
|
|
}
|