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ce99120084
query about available library functions. For now this just has memset_pattern16, which exists on darwin, but it can be extended for a bunch of other things in the future. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125965 91177308-0d34-0410-b5e6-96231b3b80d8
57 lines
1.6 KiB
C++
57 lines
1.6 KiB
C++
//===-- llvm/Target/TargetLibraryInfo.h - Library information ---*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_TARGET_TARGETLIBRARYINFO_H
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#define LLVM_TARGET_TARGETLIBRARYINFO_H
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#include "llvm/Pass.h"
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namespace llvm {
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class Triple;
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namespace LibFunc {
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enum Func {
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/// void memset_pattern16(void *b, const void *pattern16, size_t len);
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memset_pattern16,
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NumLibFuncs
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};
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}
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/// TargetLibraryInfo - This immutable pass captures information about what
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/// library functions are available for the current target, and allows a
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/// frontend to disable optimizations through -fno-builtin etc.
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class TargetLibraryInfo : public ImmutablePass {
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unsigned char AvailableArray[(LibFunc::NumLibFuncs+7)/8];
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public:
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static char ID;
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TargetLibraryInfo();
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TargetLibraryInfo(const Triple &T);
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/// has - This function is used by optimizations that want to match on or form
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/// a given library function.
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bool has(LibFunc::Func F) const {
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return (AvailableArray[F/8] & (1 << (F&7))) != 0;
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}
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/// setUnavailable - this can be used by whatever sets up TargetLibraryInfo to
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/// ban use of specific library functions.
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void setUnavailable(LibFunc::Func F) {
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AvailableArray[F/8] &= ~(1 << (F&7));
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}
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void setAvailable(LibFunc::Func F) {
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AvailableArray[F/8] |= 1 << (F&7);
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}
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};
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} // end namespace llvm
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#endif
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