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Convert calls to __sinpi and __cospi into __sincospi_stret

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This adds an SimplifyLibCalls case which converts the special __sinpi and
__cospi (float & double variants) into a __sincospi_stret where appropriate to
remove duplicated work.

Patch by Tim Northover

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193943 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bob Wilson
2013-11-03 06:48:38 +00:00
parent cb01efb798
commit 208130f113
4 changed files with 292 additions and 0 deletions
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33
lib/Target/TargetLibraryInfo.cpp
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@ -38,6 +38,8 @@ const char* TargetLibraryInfo::StandardNames[LibFunc::NumLibFuncs] =
"_ZnwjRKSt9nothrow_t",
"_Znwm",
"_ZnwmRKSt9nothrow_t",
"__cospi",
"__cospif",
"__cxa_atexit",
"__cxa_guard_abort",
"__cxa_guard_acquire",
@ -45,6 +47,10 @@ const char* TargetLibraryInfo::StandardNames[LibFunc::NumLibFuncs] =
"__isoc99_scanf",
"__isoc99_sscanf",
"__memcpy_chk",
"__sincospi_stret",
"__sincospi_stretf",
"__sinpi",
"__sinpif",
"__sqrt_finite",
"__sqrtf_finite",
"__sqrtl_finite",
@ -331,6 +337,24 @@ const char* TargetLibraryInfo::StandardNames[LibFunc::NumLibFuncs] =
"write"
};
static bool hasSinCosPiStret(const Triple &T) {
// Only Darwin variants have _stret versions of combined trig functions.
if (!T.isMacOSX() && T.getOS() != Triple::IOS)
return false;
// The ABI is rather complicated on x86, so don't do anything special there.
if (T.getArch() == Triple::x86)
return false;
if (T.isMacOSX() && T.isMacOSXVersionLT(10, 9))
return false;
if (T.getOS() == Triple::IOS && T.isOSVersionLT(7, 0))
return false;
return true;
}
/// initialize - Initialize the set of available library functions based on the
/// specified target triple. This should be carefully written so that a missing
/// target triple gets a sane set of defaults.
@ -357,6 +381,15 @@ static void initialize(TargetLibraryInfo &TLI, const Triple &T,
TLI.setUnavailable(LibFunc::memset_pattern16);
}
if (!hasSinCosPiStret(T)) {
TLI.setUnavailable(LibFunc::sinpi);
TLI.setUnavailable(LibFunc::sinpif);
TLI.setUnavailable(LibFunc::cospi);
TLI.setUnavailable(LibFunc::cospif);
TLI.setUnavailable(LibFunc::sincospi_stret);
TLI.setUnavailable(LibFunc::sincospi_stretf);
}
if (T.isMacOSX() && T.getArch() == Triple::x86 &&
!T.isMacOSXVersionLT(10, 7)) {
// x86-32 OSX has a scheme where fwrite and fputs (and some other functions