re PR fortran/88678 (Many gfortran.dg/ieee/ieee_X.f90 test cases fail starting with r267465)

	PR fortran/88678
	* config/fpu-glibc.h (support_fpu_trap): Do not try to enable
	exceptions to determine if exception is supported.

From-SVN: r268402

libgfortran/ChangeLog

 2019-01-30  Uroš Bizjak  <ubizjak@gmail.com>
 
 	PR fortran/88678
+	* config/fpu-glibc.h (support_fpu_trap): Do not try to enable
+	exceptions to determine if exception is supported.
+
+2019-01-30  Uroš Bizjak  <ubizjak@gmail.com>
+
+	PR fortran/88678
 	* config/fpu-glibc.h (set_fpu_trap_exceptions): Clear stalled
 	exception flags before changing trap mode.  Optimize to call
 	feenableexcept and fedisableexcept only once.

libgfortran/config/fpu-glibc.h

@@ -129,41 +129,7 @@ get_fpu_trap_exceptions (void)
 int
 support_fpu_trap (int flag)
 {
-  int exceptions = 0;
-  int old;
-
-  if (!support_fpu_flag (flag))
-    return 0;
-
-#ifdef FE_INVALID
-  if (flag & GFC_FPE_INVALID) exceptions |= FE_INVALID;
-#endif
-
-#ifdef FE_DIVBYZERO
-  if (flag & GFC_FPE_ZERO) exceptions |= FE_DIVBYZERO;
-#endif
-
-#ifdef FE_OVERFLOW
-  if (flag & GFC_FPE_OVERFLOW) exceptions |= FE_OVERFLOW;
-#endif
-
-#ifdef FE_UNDERFLOW
-  if (flag & GFC_FPE_UNDERFLOW) exceptions |= FE_UNDERFLOW;
-#endif
-
-#ifdef FE_DENORMAL
-  if (flag & GFC_FPE_DENORMAL) exceptions |= FE_DENORMAL;
-#endif
-
-#ifdef FE_INEXACT
-  if (flag & GFC_FPE_INEXACT) exceptions |= FE_INEXACT;
-#endif
-
-  old = feenableexcept (exceptions);
-  if (old == -1)
-    return 0;
-  fedisableexcept (exceptions & ~old);
-  return 1;
+  return support_fpu_flag (flag);
 }