1 //===-- TargetLibraryInfo.cpp - Runtime library information ----------------==//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the TargetLibraryInfo class.
12 //===----------------------------------------------------------------------===//
14 #include "llvm/Target/TargetLibraryInfo.h"
15 #include "llvm/ADT/Triple.h"
18 // Register the default implementation.
19 INITIALIZE_PASS(TargetLibraryInfo, "targetlibinfo",
20 "Target Library Information", false, true)
21 char TargetLibraryInfo::ID = 0;
23 const char* TargetLibraryInfo::StandardNames[LibFunc::NumLibFuncs] =
117 /// initialize - Initialize the set of available library functions based on the
118 /// specified target triple. This should be carefully written so that a missing
119 /// target triple gets a sane set of defaults.
120 static void initialize(TargetLibraryInfo &TLI, const Triple &T) {
121 initializeTargetLibraryInfoPass(*PassRegistry::getPassRegistry());
124 // memset_pattern16 is only available on iOS 3.0 and Mac OS/X 10.5 and later.
126 if (T.isMacOSXVersionLT(10, 5))
127 TLI.setUnavailable(LibFunc::memset_pattern16);
128 } else if (T.getOS() == Triple::IOS) {
129 if (T.isOSVersionLT(3, 0))
130 TLI.setUnavailable(LibFunc::memset_pattern16);
132 TLI.setUnavailable(LibFunc::memset_pattern16);
135 if (T.isMacOSX() && T.getArch() == Triple::x86 &&
136 !T.isMacOSXVersionLT(10, 7)) {
137 // x86-32 OSX has a scheme where fwrite and fputs (and some other functions
138 // we don't care about) have two versions; on recent OSX, the one we want
139 // has a $UNIX2003 suffix. The two implementations are identical except
140 // for the return value in some edge cases. However, we don't want to
141 // generate code that depends on the old symbols.
142 TLI.setAvailableWithName(LibFunc::fwrite, "fwrite$UNIX2003");
143 TLI.setAvailableWithName(LibFunc::fputs, "fputs$UNIX2003");
146 // iprintf and friends are only available on XCore and TCE.
147 if (T.getArch() != Triple::xcore && T.getArch() != Triple::tce) {
148 TLI.setUnavailable(LibFunc::iprintf);
149 TLI.setUnavailable(LibFunc::siprintf);
150 TLI.setUnavailable(LibFunc::fiprintf);
155 TargetLibraryInfo::TargetLibraryInfo() : ImmutablePass(ID) {
156 // Default to everything being available.
157 memset(AvailableArray, -1, sizeof(AvailableArray));
159 initialize(*this, Triple());
162 TargetLibraryInfo::TargetLibraryInfo(const Triple &T) : ImmutablePass(ID) {
163 // Default to everything being available.
164 memset(AvailableArray, -1, sizeof(AvailableArray));
166 initialize(*this, T);
169 TargetLibraryInfo::TargetLibraryInfo(const TargetLibraryInfo &TLI)
170 : ImmutablePass(ID) {
171 memcpy(AvailableArray, TLI.AvailableArray, sizeof(AvailableArray));
172 CustomNames = TLI.CustomNames;
176 /// disableAllFunctions - This disables all builtins, which is used for options
177 /// like -fno-builtin.
178 void TargetLibraryInfo::disableAllFunctions() {
179 memset(AvailableArray, 0, sizeof(AvailableArray));