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] =
39 /// initialize - Initialize the set of available library functions based on the
40 /// specified target triple. This should be carefully written so that a missing
41 /// target triple gets a sane set of defaults.
42 static void initialize(TargetLibraryInfo &TLI, const Triple &T) {
43 initializeTargetLibraryInfoPass(*PassRegistry::getPassRegistry());
46 // memset_pattern16 is only available on iOS 3.0 and Mac OS/X 10.5 and later.
48 if (T.isMacOSXVersionLT(10, 5))
49 TLI.setUnavailable(LibFunc::memset_pattern16);
50 } else if (T.getOS() == Triple::IOS) {
51 if (T.isOSVersionLT(3, 0))
52 TLI.setUnavailable(LibFunc::memset_pattern16);
54 TLI.setUnavailable(LibFunc::memset_pattern16);
57 if (T.isMacOSX() && T.getArch() == Triple::x86 &&
58 !T.isMacOSXVersionLT(10, 7)) {
59 // x86-32 OSX has a scheme where fwrite and fputs (and some other functions
60 // we don't care about) have two versions; on recent OSX, the one we want
61 // has a $UNIX2003 suffix. The two implementations are identical except
62 // for the return value in some edge cases. However, we don't want to
63 // generate code that depends on the old symbols.
64 TLI.setAvailableWithName(LibFunc::fwrite, "fwrite$UNIX2003");
65 TLI.setAvailableWithName(LibFunc::fputs, "fputs$UNIX2003");
68 // iprintf and friends are only available on XCore and TCE.
69 if (T.getArch() != Triple::xcore && T.getArch() != Triple::tce) {
70 TLI.setUnavailable(LibFunc::iprintf);
71 TLI.setUnavailable(LibFunc::siprintf);
72 TLI.setUnavailable(LibFunc::fiprintf);
77 TargetLibraryInfo::TargetLibraryInfo() : ImmutablePass(ID) {
78 // Default to everything being available.
79 memset(AvailableArray, -1, sizeof(AvailableArray));
81 initialize(*this, Triple());
84 TargetLibraryInfo::TargetLibraryInfo(const Triple &T) : ImmutablePass(ID) {
85 // Default to everything being available.
86 memset(AvailableArray, -1, sizeof(AvailableArray));
91 TargetLibraryInfo::TargetLibraryInfo(const TargetLibraryInfo &TLI)
93 memcpy(AvailableArray, TLI.AvailableArray, sizeof(AvailableArray));
94 CustomNames = TLI.CustomNames;
98 /// disableAllFunctions - This disables all builtins, which is used for options
99 /// like -fno-builtin.
100 void TargetLibraryInfo::disableAllFunctions() {
101 memset(AvailableArray, 0, sizeof(AvailableArray));