rs6000.c (rs6000_scalar_mode_supported_p): Disallow TImode for TARGET_32BIT.

	* config/rs6000/rs6000.c (rs6000_scalar_mode_supported_p): Disallow
	TImode for TARGET_32BIT.

From-SVN: r219754

gcc/ChangeLog

 2015-01-16  Segher Boessenkool  <segher@kernel.crashing.org>
 
+	* config/rs6000/rs6000.c (rs6000_scalar_mode_supported_p): Disallow
+	TImode for TARGET_32BIT.
+
+2015-01-16  Segher Boessenkool  <segher@kernel.crashing.org>
+
 	* config/rs6000/rs6000.c (TARGET_LIBGCC_CMP_RETURN_MODE,
 	TARGET_LIBGCC_SHIFT_COUNT_MODE, TARGET_UNWIND_WORD_MODE): Implement
 	as ...

gcc/config/rs6000/rs6000.c

@@ -31967,6 +31967,14 @@ rs6000_eh_return_filter_mode (void)
 static bool
 rs6000_scalar_mode_supported_p (machine_mode mode)
 {
+  /* -m32 does not support TImode.  This is the default, from
+     default_scalar_mode_supported_p.  For -m32 -mpowerpc64 we want the
+     same ABI as for -m32.  But default_scalar_mode_supported_p allows
+     integer modes of precision 2 * BITS_PER_WORD, which matches TImode
+     for -mpowerpc64.  */
+  if (TARGET_32BIT && mode == TImode)
+    return false;
+
   if (DECIMAL_FLOAT_MODE_P (mode))
     return default_decimal_float_supported_p ();
   else