[TargetLibraryInfo] Update run time support for Windows

It seems that, since VC19, the `float` C99 math functions are supported for all
targets, unlike the C89 ones.

According to the discussion at https://reviews.llvm.org/D57625.

llvm-svn: 353758

1 files changed, 39 insertions, 47 deletions

diff --git a/llvm/lib/Analysis/TargetLibraryInfo.cpp b/llvm/lib/Analysis/TargetLibraryInfo.cpp
index 608ac6680e6..29e460ec785 100644
--- a/llvm/lib/Analysis/TargetLibraryInfo.cpp
+++ b/llvm/lib/Analysis/TargetLibraryInfo.cpp
@@ -172,26 +172,26 @@ static void initialize(TargetLibraryInfoImpl &TLI, const Triple &T,
       hasPartialC99 = (Major == 0 || Major >= 19);
     }
 
-    // Latest targets support float math functions, in part.
-    bool hasPartialFloat = (T.getArch() == Triple::aarch64 ||
-                            T.getArch() == Triple::arm ||
+    // Latest targets support C89 math functions, in part.
+    bool isARM = (T.getArch() == Triple::aarch64 ||
+                  T.getArch() == Triple::arm);
+    bool hasPartialFloat = (isARM ||
                             T.getArch() == Triple::x86_64);
 
-    // Win32 does not support float math functions, in general.
+    // Win32 does not support float C89 math functions, in general.
     if (!hasPartialFloat) {
       TLI.setUnavailable(LibFunc_acosf);
       TLI.setUnavailable(LibFunc_asinf);
-      TLI.setUnavailable(LibFunc_atanf);
       TLI.setUnavailable(LibFunc_atan2f);
+      TLI.setUnavailable(LibFunc_atanf);
       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_fmodf);
-      TLI.setUnavailable(LibFunc_logf);
       TLI.setUnavailable(LibFunc_log10f);
+      TLI.setUnavailable(LibFunc_logf);
       TLI.setUnavailable(LibFunc_modff);
       TLI.setUnavailable(LibFunc_powf);
       TLI.setUnavailable(LibFunc_sinf);
@@ -200,31 +200,27 @@ static void initialize(TargetLibraryInfoImpl &TLI, const Triple &T,
       TLI.setUnavailable(LibFunc_tanf);
       TLI.setUnavailable(LibFunc_tanhf);
     }
-    TLI.setUnavailable(LibFunc_fabsf);
-    TLI.setUnavailable(LibFunc_fmaxf);
-    TLI.setUnavailable(LibFunc_fminf);
+    if (!isARM)
+      TLI.setUnavailable(LibFunc_fabsf);
     TLI.setUnavailable(LibFunc_frexpf);
     TLI.setUnavailable(LibFunc_ldexpf);
 
-    // Win32 does not support long double math functions.
+    // Win32 does not support long double C89 math functions.
     TLI.setUnavailable(LibFunc_acosl);
     TLI.setUnavailable(LibFunc_asinl);
-    TLI.setUnavailable(LibFunc_atanl);
     TLI.setUnavailable(LibFunc_atan2l);
+    TLI.setUnavailable(LibFunc_atanl);
     TLI.setUnavailable(LibFunc_ceill);
-    TLI.setUnavailable(LibFunc_copysignl);
     TLI.setUnavailable(LibFunc_cosl);
     TLI.setUnavailable(LibFunc_coshl);
     TLI.setUnavailable(LibFunc_expl);
     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_ldexpl);
-    TLI.setUnavailable(LibFunc_logl);
     TLI.setUnavailable(LibFunc_log10l);
+    TLI.setUnavailable(LibFunc_logl);
     TLI.setUnavailable(LibFunc_modfl);
     TLI.setUnavailable(LibFunc_powl);
     TLI.setUnavailable(LibFunc_sinl);
@@ -236,45 +232,53 @@ static void initialize(TargetLibraryInfoImpl &TLI, const Triple &T,
     // Win32 does not fully support C99 math functions.
     if (!hasPartialC99) {
       TLI.setUnavailable(LibFunc_acosh);
+      TLI.setUnavailable(LibFunc_acoshf);
       TLI.setUnavailable(LibFunc_asinh);
+      TLI.setUnavailable(LibFunc_asinhf);
       TLI.setUnavailable(LibFunc_atanh);
+      TLI.setUnavailable(LibFunc_atanhf);
+      TLI.setAvailableWithName(LibFunc_cabs, "_cabs");
+      TLI.setUnavailable(LibFunc_cabsf);
       TLI.setUnavailable(LibFunc_cbrt);
+      TLI.setUnavailable(LibFunc_cbrtf);
+      TLI.setAvailableWithName(LibFunc_copysign, "_copysign");
+      TLI.setAvailableWithName(LibFunc_copysignf, "_copysignf");
       TLI.setUnavailable(LibFunc_exp2);
+      TLI.setUnavailable(LibFunc_exp2f);
       TLI.setUnavailable(LibFunc_expm1);
+      TLI.setUnavailable(LibFunc_expm1f);
+      TLI.setUnavailable(LibFunc_fmax);
+      TLI.setUnavailable(LibFunc_fmaxf);
+      TLI.setUnavailable(LibFunc_fmin);
+      TLI.setUnavailable(LibFunc_fminf);
       TLI.setUnavailable(LibFunc_log1p);
+      TLI.setUnavailable(LibFunc_log1pf);
       TLI.setUnavailable(LibFunc_log2);
-      TLI.setUnavailable(LibFunc_logb);
-      TLI.setUnavailable(LibFunc_nearbyint);
+      TLI.setUnavailable(LibFunc_log2f);
+      TLI.setAvailableWithName(LibFunc_logb, "_logb");
+      if (hasPartialFloat)
+        TLI.setAvailableWithName(LibFunc_logbf, "_logbf");
+      else
+        TLI.setUnavailable(LibFunc_logbf);
       TLI.setUnavailable(LibFunc_rint);
+      TLI.setUnavailable(LibFunc_rintf);
       TLI.setUnavailable(LibFunc_round);
+      TLI.setUnavailable(LibFunc_roundf);
       TLI.setUnavailable(LibFunc_trunc);
+      TLI.setUnavailable(LibFunc_truncf);
     }
 
-    // Win32 does not support float C99 math functions, in general.
-    TLI.setUnavailable(LibFunc_acoshf);
-    TLI.setUnavailable(LibFunc_asinhf);
-    TLI.setUnavailable(LibFunc_atanhf);
-    TLI.setUnavailable(LibFunc_cabsf);
-    TLI.setUnavailable(LibFunc_cbrtf);
-    TLI.setUnavailable(LibFunc_exp2f);
-    TLI.setUnavailable(LibFunc_expm1f);
-    TLI.setUnavailable(LibFunc_log1pf);
-    TLI.setUnavailable(LibFunc_log2f);
-    if (!hasPartialFloat || !hasPartialC99)
-      TLI.setUnavailable(LibFunc_logbf);
-    TLI.setUnavailable(LibFunc_nearbyintf);
-    TLI.setUnavailable(LibFunc_rintf);
-    TLI.setUnavailable(LibFunc_roundf);
-    TLI.setUnavailable(LibFunc_truncf);
-
     // Win32 does not support long double C99 math functions.
     TLI.setUnavailable(LibFunc_acoshl);
     TLI.setUnavailable(LibFunc_asinhl);
     TLI.setUnavailable(LibFunc_atanhl);
     TLI.setUnavailable(LibFunc_cabsl);
     TLI.setUnavailable(LibFunc_cbrtl);
+    TLI.setUnavailable(LibFunc_copysignl);
     TLI.setUnavailable(LibFunc_exp2l);
     TLI.setUnavailable(LibFunc_expm1l);
+    TLI.setUnavailable(LibFunc_fmaxl);
+    TLI.setUnavailable(LibFunc_fminl);
     TLI.setUnavailable(LibFunc_log1pl);
     TLI.setUnavailable(LibFunc_log2l);
     TLI.setUnavailable(LibFunc_logbl);
@@ -283,18 +287,6 @@ static void initialize(TargetLibraryInfoImpl &TLI, const Triple &T,
     TLI.setUnavailable(LibFunc_roundl);
     TLI.setUnavailable(LibFunc_truncl);
 
-    // Win32 supports some C89 and C99 math functions, but with mangled names.
-    TLI.setAvailableWithName(LibFunc_cabs, "_cabs");
-    TLI.setAvailableWithName(LibFunc_copysign, "_copysign");
-    if (hasPartialFloat)
-      TLI.setAvailableWithName(LibFunc_copysignf, "_copysignf");
-    if (hasPartialFloat && hasPartialC99)
-      TLI.setAvailableWithName(LibFunc_logbf, "_logbf");
-
-    // Win32 does not support these C99 functions.
-    TLI.setUnavailable(LibFunc_atoll);
-    TLI.setUnavailable(LibFunc_llabs);
-
     // Win32 does not support these functions, but
     // they are generally available on POSIX-compliant systems.
     TLI.setUnavailable(LibFunc_access);