re PR target/87496 (ICE in aggregate_value_p at gcc/function.c:2046)

gcc/
	PR target/87496
	* config/rs6000/rs6000.c (rs6000_option_override_internal): Disallow
	-mabi=ieeelongdouble without both -mpopcntd and -mvsx.

gcc/testsuite/
	PR target/87496
	* gcc.target/powerpc/pr87496.c: New test.

From-SVN: r266636

gcc/ChangeLog

+2018-11-29  Peter Bergner  <bergner@linux.ibm.com>
+
+	PR target/87496
+	* config/rs6000/rs6000.c (rs6000_option_override_internal): Disallow
+	-mabi=ieeelongdouble without both -mpopcntd and -mvsx.
+
 2018-11-29  Uros Bizjak  <ubizjak@gmail.com>
 
 	* config/i386/i386.c (inline_memory_move_cost):

gcc/config/rs6000/rs6000.c

@@ -4291,7 +4291,12 @@ rs6000_option_override_internal (bool global_init_p)
   if (!global_options_set.x_rs6000_ieeequad)
     rs6000_ieeequad = TARGET_IEEEQUAD_DEFAULT;
 
-  else if (rs6000_ieeequad != TARGET_IEEEQUAD_DEFAULT && TARGET_LONG_DOUBLE_128)
+  else
+    {
+      if (!TARGET_POPCNTD || !TARGET_VSX)
+	error ("%qs requires full ISA 2.06 support", "-mabi=ieeelongdouble");
+
+      if (rs6000_ieeequad != TARGET_IEEEQUAD_DEFAULT && TARGET_LONG_DOUBLE_128)
 	{
 	  static bool warned_change_long_double;
 	  if (!warned_change_long_double)
@@ -4303,6 +4308,7 @@ rs6000_option_override_internal (bool global_init_p)
 		warning (OPT_Wpsabi, "Using IBM extended precision long double");
 	    }
 	}
+    }
 
   /* Enable the default support for IEEE 128-bit floating point on Linux VSX
      sytems.  In GCC 7, we would enable the the IEEE 128-bit floating point

gcc/testsuite/ChangeLog

+2018-11-29  Peter Bergner  <bergner@linux.ibm.com>
+
+	PR target/87496
+	* gcc.target/powerpc/pr87496.c: New test.
+
 2018-11-29  Martin Sebor  <msebor@redhat.com>
 
 	PR c/88172

gcc/testsuite/gcc.target/powerpc/pr87496.c

+/* PR target/87496.c */
+/* { dg-do compile { target { powerpc*-*-* && lp64 } } } */
+/* { dg-skip-if "" { powerpc*-*-darwin* } } */
+/* { dg-skip-if "do not override -mcpu" { powerpc*-*-* } { "-mcpu=*" } { "-mcpu=power7" } } */
+/* { dg-require-effective-target longdouble128 } */
+/* { dg-options "-O2 -mcpu=power7 -mabi=ieeelongdouble -mno-popcntd -Wno-psabi" } */
+
+int i;
+
+/* { dg-error "'-mabi=ieeelongdouble' requires full ISA 2.06 support" "PR87496" { target *-*-* } 0 } */