[PATCH] [TargetLibraryInfo] Update run time support for Windows

It seems that the run time for Windows has changed and supports more math
functions than before.  Since LLVM requires at least VS2015, I assume that
this is the run time that would be redistributed with programs built with
Clang.  Thus, I based this update on the header file `math.h` that
accompanies it.

This patch addresses the PR40541.  Unfortunately, I have no access to a
Windows development environment to validate it.

llvm-svn: 353114

1 files changed, 59 insertions, 53 deletions

diff --git a/llvm/lib/Analysis/TargetLibraryInfo.cpp b/llvm/lib/Analysis/TargetLibraryInfo.cpp
index e0ee8d497c2..050a73e8598 100644
--- a/llvm/lib/Analysis/TargetLibraryInfo.cpp
+++ b/llvm/lib/Analysis/TargetLibraryInfo.cpp
@@ -160,7 +160,39 @@ static void initialize(TargetLibraryInfoImpl &TLI, const Triple &T,
   }
 
   if (T.isOSWindows() && !T.isOSCygMing()) {
-    // Win32 does not support long double
+    bool is64 = (T.getArch() == Triple::aarch64 ||
+                 T.getArch() == Triple::x86_64);
+
+    // Win32 does not support float math functions, in general.
+    if (!is64) {
+      TLI.setUnavailable(LibFunc_acosf);
+      TLI.setUnavailable(LibFunc_asinf);
+      TLI.setUnavailable(LibFunc_atanf);
+      TLI.setUnavailable(LibFunc_atan2f);
+      TLI.setUnavailable(LibFunc_ceilf);
+      TLI.setUnavailable(LibFunc_cosf);
+      TLI.setUnavailable(LibFunc_coshf);
+      TLI.setUnavailable(LibFunc_expf);
+      TLI.setUnavailable(LibFunc_floorf);
+      TLI.setUnavailable(LibFunc_fmodf);
+      TLI.setUnavailable(LibFunc_logf);
+      TLI.setUnavailable(LibFunc_log10f);
+      TLI.setUnavailable(LibFunc_modff);
+      TLI.setUnavailable(LibFunc_powf);
+      TLI.setUnavailable(LibFunc_sinf);
+      TLI.setUnavailable(LibFunc_sinhf);
+      TLI.setUnavailable(LibFunc_sqrtf);
+      TLI.setUnavailable(LibFunc_tanf);
+      TLI.setUnavailable(LibFunc_tanhf);
+    }
+    TLI.setUnavailable(LibFunc_copysignf);
+    TLI.setUnavailable(LibFunc_fabsf);
+    TLI.setUnavailable(LibFunc_fmaxf);
+    TLI.setUnavailable(LibFunc_fminf);
+    TLI.setUnavailable(LibFunc_frexpf);
+    TLI.setUnavailable(LibFunc_ldexpf);
+
+    // Win32 does not support long double.
     TLI.setUnavailable(LibFunc_acosl);
     TLI.setUnavailable(LibFunc_asinl);
     TLI.setUnavailable(LibFunc_atanl);
@@ -170,16 +202,15 @@ static void initialize(TargetLibraryInfoImpl &TLI, const Triple &T,
     TLI.setUnavailable(LibFunc_cosl);
     TLI.setUnavailable(LibFunc_coshl);
     TLI.setUnavailable(LibFunc_expl);
-    TLI.setUnavailable(LibFunc_fabsf); // Win32 and Win64 both lack fabsf
     TLI.setUnavailable(LibFunc_fabsl);
     TLI.setUnavailable(LibFunc_floorl);
     TLI.setUnavailable(LibFunc_fmaxl);
     TLI.setUnavailable(LibFunc_fminl);
     TLI.setUnavailable(LibFunc_fmodl);
     TLI.setUnavailable(LibFunc_frexpl);
-    TLI.setUnavailable(LibFunc_ldexpf);
     TLI.setUnavailable(LibFunc_ldexpl);
     TLI.setUnavailable(LibFunc_logl);
+    TLI.setUnavailable(LibFunc_log10l);
     TLI.setUnavailable(LibFunc_modfl);
     TLI.setUnavailable(LibFunc_powl);
     TLI.setUnavailable(LibFunc_sinl);
@@ -188,80 +219,61 @@ static void initialize(TargetLibraryInfoImpl &TLI, const Triple &T,
     TLI.setUnavailable(LibFunc_tanl);
     TLI.setUnavailable(LibFunc_tanhl);
 
-    // Win32 only has C89 math
-    TLI.setUnavailable(LibFunc_acosh);
+    // Win32 does not support C89 math functions, in general.
+    // acosh
     TLI.setUnavailable(LibFunc_acoshf);
     TLI.setUnavailable(LibFunc_acoshl);
-    TLI.setUnavailable(LibFunc_asinh);
+    // asinh
     TLI.setUnavailable(LibFunc_asinhf);
     TLI.setUnavailable(LibFunc_asinhl);
-    TLI.setUnavailable(LibFunc_atanh);
+    // atanh
     TLI.setUnavailable(LibFunc_atanhf);
     TLI.setUnavailable(LibFunc_atanhl);
     TLI.setUnavailable(LibFunc_cabs);
     TLI.setUnavailable(LibFunc_cabsf);
     TLI.setUnavailable(LibFunc_cabsl);
-    TLI.setUnavailable(LibFunc_cbrt);
+    // cbrt
     TLI.setUnavailable(LibFunc_cbrtf);
     TLI.setUnavailable(LibFunc_cbrtl);
-    TLI.setUnavailable(LibFunc_exp2);
+    // exp2
     TLI.setUnavailable(LibFunc_exp2f);
     TLI.setUnavailable(LibFunc_exp2l);
-    TLI.setUnavailable(LibFunc_expm1);
+    // expm1
     TLI.setUnavailable(LibFunc_expm1f);
     TLI.setUnavailable(LibFunc_expm1l);
-    TLI.setUnavailable(LibFunc_log2);
-    TLI.setUnavailable(LibFunc_log2f);
-    TLI.setUnavailable(LibFunc_log2l);
-    TLI.setUnavailable(LibFunc_log1p);
+    // log1p
     TLI.setUnavailable(LibFunc_log1pf);
     TLI.setUnavailable(LibFunc_log1pl);
-    TLI.setUnavailable(LibFunc_logb);
-    TLI.setUnavailable(LibFunc_logbf);
+    // log2
+    TLI.setUnavailable(LibFunc_log2f);
+    TLI.setUnavailable(LibFunc_log2l);
+    // logb
+    if (!is64)
+      TLI.setUnavailable(LibFunc_logbf);
     TLI.setUnavailable(LibFunc_logbl);
-    TLI.setUnavailable(LibFunc_nearbyint);
+    // nearbyint
     TLI.setUnavailable(LibFunc_nearbyintf);
     TLI.setUnavailable(LibFunc_nearbyintl);
-    TLI.setUnavailable(LibFunc_rint);
+    // rint
     TLI.setUnavailable(LibFunc_rintf);
     TLI.setUnavailable(LibFunc_rintl);
-    TLI.setUnavailable(LibFunc_round);
+    // round
     TLI.setUnavailable(LibFunc_roundf);
     TLI.setUnavailable(LibFunc_roundl);
-    TLI.setUnavailable(LibFunc_trunc);
+    // trunc
     TLI.setUnavailable(LibFunc_truncf);
     TLI.setUnavailable(LibFunc_truncl);
 
-    // Win32 provides some C99 math with mangled names
+    // Win32 supports some C89 and C99 math functions, but with mangled names.
     TLI.setAvailableWithName(LibFunc_copysign, "_copysign");
+    if (is64)
+      TLI.setAvailableWithName(LibFunc_logbf, "_logbf");
 
-    if (T.getArch() == Triple::x86) {
-      // Win32 on x86 implements single-precision math functions as macros
-      TLI.setUnavailable(LibFunc_acosf);
-      TLI.setUnavailable(LibFunc_asinf);
-      TLI.setUnavailable(LibFunc_atanf);
-      TLI.setUnavailable(LibFunc_atan2f);
-      TLI.setUnavailable(LibFunc_ceilf);
-      TLI.setUnavailable(LibFunc_copysignf);
-      TLI.setUnavailable(LibFunc_cosf);
-      TLI.setUnavailable(LibFunc_coshf);
-      TLI.setUnavailable(LibFunc_expf);
-      TLI.setUnavailable(LibFunc_floorf);
-      TLI.setUnavailable(LibFunc_fminf);
-      TLI.setUnavailable(LibFunc_fmaxf);
-      TLI.setUnavailable(LibFunc_fmodf);
-      TLI.setUnavailable(LibFunc_logf);
-      TLI.setUnavailable(LibFunc_log10f);
-      TLI.setUnavailable(LibFunc_modff);
-      TLI.setUnavailable(LibFunc_powf);
-      TLI.setUnavailable(LibFunc_sinf);
-      TLI.setUnavailable(LibFunc_sinhf);
-      TLI.setUnavailable(LibFunc_sqrtf);
-      TLI.setUnavailable(LibFunc_tanf);
-      TLI.setUnavailable(LibFunc_tanhf);
-    }
+    // Win32 does not support these C99 functions.
+    TLI.setUnavailable(LibFunc_atoll);
+    TLI.setUnavailable(LibFunc_llabs);
 
-    // Win32 does *not* provide these functions, but they are
+    // Win32 does not support these functions, but they are
     // generally available on POSIX-compliant systems:
     TLI.setUnavailable(LibFunc_access);
     TLI.setUnavailable(LibFunc_bcmp);
@@ -317,12 +329,6 @@ static void initialize(TargetLibraryInfoImpl &TLI, const Triple &T,
     TLI.setUnavailable(LibFunc_utime);
     TLI.setUnavailable(LibFunc_utimes);
     TLI.setUnavailable(LibFunc_write);
-
-    // Win32 does *not* provide provide these functions, but they are
-    // specified by C99:
-    TLI.setUnavailable(LibFunc_atoll);
-    TLI.setUnavailable(LibFunc_frexpf);
-    TLI.setUnavailable(LibFunc_llabs);
   }
 
   switch (T.getOS()) {