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llvm-6502/include/llvm/Target/TargetLibraryInfo.h
Benjamin Kramer 8e0d1c03ca Make MemoryBuiltins aware of TargetLibraryInfo. 
This disables malloc-specific optimization when -fno-builtin (or -ffreestanding)
is specified. This has been a problem for a long time but became more severe
with the recent memory builtin improvements.

Since the memory builtin functions are used everywhere, this required passing
TLI in many places. This means that functions that now have an optional TLI
argument, like RecursivelyDeleteTriviallyDeadFunctions, won't remove dead
mallocs anymore if the TLI argument is missing. I've updated most passes to do
the right thing.

Fixes PR13694 and probably others.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162841 91177308-0d34-0410-b5e6-96231b3b80d8
2012-08-29 15:32:21 +00:00

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//===-- llvm/Target/TargetLibraryInfo.h - Library information ---*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_TARGET_TARGETLIBRARYINFO_H
#define LLVM_TARGET_TARGETLIBRARYINFO_H
#include "llvm/Pass.h"
#include "llvm/ADT/DenseMap.h"
namespace llvm {
class Triple;
namespace LibFunc {
enum Func {
/// void operator delete[](void*);
ZdaPv,
/// void operator delete(void*);
ZdlPv,
/// void *new[](unsigned int);
Znaj,
/// void *new[](unsigned int, nothrow);
ZnajRKSt9nothrow_t,
/// void *new[](unsigned long);
Znam,
/// void *new[](unsigned long, nothrow);
ZnamRKSt9nothrow_t,
/// void *new(unsigned int);
Znwj,
/// void *new(unsigned int, nothrow);
ZnwjRKSt9nothrow_t,
/// void *new(unsigned long);
Znwm,
/// void *new(unsigned long, nothrow);
ZnwmRKSt9nothrow_t,
/// int __cxa_atexit(void (*f)(void *), void *p, void *d);
cxa_atexit,
/// void __cxa_guard_abort(guard_t *guard);
/// guard_t is int64_t in Itanium ABI or int32_t on ARM eabi.
cxa_guard_abort,
/// int __cxa_guard_acquire(guard_t *guard);
cxa_guard_acquire,
/// void __cxa_guard_release(guard_t *guard);
cxa_guard_release,
/// void *__memcpy_chk(void *s1, const void *s2, size_t n, size_t s1size);
memcpy_chk,
/// double acos(double x);
acos,
/// float acosf(float x);
acosf,
/// double acosh(double x);
acosh,
/// float acoshf(float x);
acoshf,
/// long double acoshl(long double x);
acoshl,
/// long double acosl(long double x);
acosl,
/// double asin(double x);
asin,
/// float asinf(float x);
asinf,
/// double asinh(double x);
asinh,
/// float asinhf(float x);
asinhf,
/// long double asinhl(long double x);
asinhl,
/// long double asinl(long double x);
asinl,
/// double atan(double x);
atan,
/// double atan2(double y, double x);
atan2,
/// float atan2f(float y, float x);
atan2f,
/// long double atan2l(long double y, long double x);
atan2l,
/// float atanf(float x);
atanf,
/// double atanh(double x);
atanh,
/// float atanhf(float x);
atanhf,
/// long double atanhl(long double x);
atanhl,
/// long double atanl(long double x);
atanl,
/// void *calloc(size_t count, size_t size);
calloc,
/// double cbrt(double x);
cbrt,
/// float cbrtf(float x);
cbrtf,
/// long double cbrtl(long double x);
cbrtl,
/// double ceil(double x);
ceil,
/// float ceilf(float x);
ceilf,
/// long double ceill(long double x);
ceill,
/// double copysign(double x, double y);
copysign,
/// float copysignf(float x, float y);
copysignf,
/// long double copysignl(long double x, long double y);
copysignl,
/// double cos(double x);
cos,
/// float cosf(float x);
cosf,
/// double cosh(double x);
cosh,
/// float coshf(float x);
coshf,
/// long double coshl(long double x);
coshl,
/// long double cosl(long double x);
cosl,
/// double exp(double x);
exp,
/// double exp10(double x);
exp10,
/// float exp10f(float x);
exp10f,
/// long double exp10l(long double x);
exp10l,
/// double exp2(double x);
exp2,
/// float exp2f(float x);
exp2f,
/// long double exp2l(long double x);
exp2l,
/// float expf(float x);
expf,
/// long double expl(long double x);
expl,
/// double expm1(double x);
expm1,
/// float expm1f(float x);
expm1f,
/// long double expm1l(long double x);
expm1l,
/// double fabs(double x);
fabs,
/// float fabsf(float x);
fabsf,
/// long double fabsl(long double x);
fabsl,
/// int fiprintf(FILE *stream, const char *format, ...);
fiprintf,
/// double floor(double x);
floor,
/// float floorf(float x);
floorf,
/// long double floorl(long double x);
floorl,
/// double fmod(double x, double y);
fmod,
/// float fmodf(float x, float y);
fmodf,
/// long double fmodl(long double x, long double y);
fmodl,
/// int fputc(int c, FILE *stream);
fputc,
/// int fputs(const char *s, FILE *stream);
fputs,
/// void free(void *ptr);
free,
/// size_t fwrite(const void *ptr, size_t size, size_t nitems,
/// FILE *stream);
fwrite,
/// int iprintf(const char *format, ...);
iprintf,
/// double log(double x);
log,
/// double log10(double x);
log10,
/// float log10f(float x);
log10f,
/// long double log10l(long double x);
log10l,
/// double log1p(double x);
log1p,
/// float log1pf(float x);
log1pf,
/// long double log1pl(long double x);
log1pl,
/// double log2(double x);
log2,
/// float log2f(float x);
log2f,
/// double long double log2l(long double x);
log2l,
/// double logb(double x);
logb,
/// float logbf(float x);
logbf,
/// long double logbl(long double x);
logbl,
/// float logf(float x);
logf,
/// long double logl(long double x);
logl,
/// void *malloc(size_t size);
malloc,
/// void *memchr(const void *s, int c, size_t n);
memchr,
/// int memcmp(const void *s1, const void *s2, size_t n);
memcmp,
/// void *memcpy(void *s1, const void *s2, size_t n);
memcpy,
/// void *memmove(void *s1, const void *s2, size_t n);
memmove,
/// void *memset(void *b, int c, size_t len);
memset,
/// void memset_pattern16(void *b, const void *pattern16, size_t len);
memset_pattern16,
/// double nearbyint(double x);
nearbyint,
/// float nearbyintf(float x);
nearbyintf,
/// long double nearbyintl(long double x);
nearbyintl,
/// int posix_memalign(void **memptr, size_t alignment, size_t size);
posix_memalign,
/// double pow(double x, double y);
pow,
/// float powf(float x, float y);
powf,
/// long double powl(long double x, long double y);
powl,
/// int putchar(int c);
putchar,
/// int puts(const char *s);
puts,
/// void *realloc(void *ptr, size_t size);
realloc,
/// void *reallocf(void *ptr, size_t size);
reallocf,
/// double rint(double x);
rint,
/// float rintf(float x);
rintf,
/// long double rintl(long double x);
rintl,
/// double round(double x);
round,
/// float roundf(float x);
roundf,
/// long double roundl(long double x);
roundl,
/// double sin(double x);
sin,
/// float sinf(float x);
sinf,
/// double sinh(double x);
sinh,
/// float sinhf(float x);
sinhf,
/// long double sinhl(long double x);
sinhl,
/// long double sinl(long double x);
sinl,
/// int siprintf(char *str, const char *format, ...);
siprintf,
/// double sqrt(double x);
sqrt,
/// float sqrtf(float x);
sqrtf,
/// long double sqrtl(long double x);
sqrtl,
/// char *strcat(char *s1, const char *s2);
strcat,
/// char *strchr(const char *s, int c);
strchr,
/// char *strcpy(char *s1, const char *s2);
strcpy,
/// char *strdup(const char *s1);
strdup,
/// size_t strlen(const char *s);
strlen,
/// char *strncat(char *s1, const char *s2, size_t n);
strncat,
/// int strncmp(const char *s1, const char *s2, size_t n);
strncmp,
/// char *strncpy(char *s1, const char *s2, size_t n);
strncpy,
/// char *strndup(const char *s1, size_t n);
strndup,
/// size_t strnlen(const char *s, size_t maxlen);
strnlen,
/// double tan(double x);
tan,
/// float tanf(float x);
tanf,
/// double tanh(double x);
tanh,
/// float tanhf(float x);
tanhf,
/// long double tanhl(long double x);
tanhl,
/// long double tanl(long double x);
tanl,
/// double trunc(double x);
trunc,
/// float truncf(float x);
truncf,
/// long double truncl(long double x);
truncl,
/// void *valloc(size_t size);
valloc,
NumLibFuncs
};
}
/// TargetLibraryInfo - This immutable pass captures information about what
/// library functions are available for the current target, and allows a
/// frontend to disable optimizations through -fno-builtin etc.
class TargetLibraryInfo : public ImmutablePass {
virtual void anchor();
unsigned char AvailableArray[(LibFunc::NumLibFuncs+3)/4];
llvm::DenseMap<unsigned, std::string> CustomNames;
static const char* StandardNames[LibFunc::NumLibFuncs];
enum AvailabilityState {
StandardName = 3, // (memset to all ones)
CustomName = 1,
Unavailable = 0 // (memset to all zeros)
};
void setState(LibFunc::Func F, AvailabilityState State) {
AvailableArray[F/4] &= ~(3 << 2*(F&3));
AvailableArray[F/4] |= State << 2*(F&3);
}
AvailabilityState getState(LibFunc::Func F) const {
return static_cast<AvailabilityState>((AvailableArray[F/4] >> 2*(F&3)) & 3);
}
public:
static char ID;
TargetLibraryInfo();
TargetLibraryInfo(const Triple &T);
explicit TargetLibraryInfo(const TargetLibraryInfo &TLI);
/// getLibFunc - Search for a particular function name. If it is one of the
/// known library functions, return true and set F to the corresponding value.
bool getLibFunc(StringRef funcName, LibFunc::Func &F) const;
/// has - This function is used by optimizations that want to match on or form
/// a given library function.
bool has(LibFunc::Func F) const {
return getState(F) != Unavailable;
}
/// hasOptimizedCodeGen - Return true if the function is both available as
/// a builtin and a candidate for optimized code generation.
bool hasOptimizedCodeGen(LibFunc::Func F) const {
if (getState(F) == Unavailable)
return false;
switch (F) {
default: break;
case LibFunc::copysign: case LibFunc::copysignf: case LibFunc::copysignl:
case LibFunc::fabs: case LibFunc::fabsf: case LibFunc::fabsl:
case LibFunc::sin: case LibFunc::sinf: case LibFunc::sinl:
case LibFunc::cos: case LibFunc::cosf: case LibFunc::cosl:
case LibFunc::sqrt: case LibFunc::sqrtf: case LibFunc::sqrtl:
case LibFunc::floor: case LibFunc::floorf: case LibFunc::floorl:
case LibFunc::nearbyint: case LibFunc::nearbyintf: case LibFunc::nearbyintl:
case LibFunc::ceil: case LibFunc::ceilf: case LibFunc::ceill:
case LibFunc::rint: case LibFunc::rintf: case LibFunc::rintl:
case LibFunc::trunc: case LibFunc::truncf: case LibFunc::truncl:
case LibFunc::log2: case LibFunc::log2f: case LibFunc::log2l:
case LibFunc::exp2: case LibFunc::exp2f: case LibFunc::exp2l:
case LibFunc::memcmp:
return true;
}
return false;
}
StringRef getName(LibFunc::Func F) const {
AvailabilityState State = getState(F);
if (State == Unavailable)
return StringRef();
if (State == StandardName)
return StandardNames[F];
assert(State == CustomName);
return CustomNames.find(F)->second;
}
/// setUnavailable - this can be used by whatever sets up TargetLibraryInfo to
/// ban use of specific library functions.
void setUnavailable(LibFunc::Func F) {
setState(F, Unavailable);
}
void setAvailable(LibFunc::Func F) {
setState(F, StandardName);
}
void setAvailableWithName(LibFunc::Func F, StringRef Name) {
if (StandardNames[F] != Name) {
setState(F, CustomName);
CustomNames[F] = Name;
assert(CustomNames.find(F) != CustomNames.end());
} else {
setState(F, StandardName);
}
}
/// disableAllFunctions - This disables all builtins, which is used for
/// options like -fno-builtin.
void disableAllFunctions();
};
} // end namespace llvm
#endif
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