re PR target/80103 (ICE in output_1144, at config/rs6000/vsx.md:2298)

gcc/testsuite/ChangeLog:

2017-03-27  Kelvin Nilsen  <kelvin@gcc.gnu.org>

	PR target/80103
	* gcc.target/powerpc/pr80103-1.c: New test.

gcc/ChangeLog:

2017-03-27  Kelvin Nilsen  <kelvin@gcc.gnu.org>

	PR target/80103
	* config/rs6000/rs6000-c.c (rs6000_target_modify_macros): Edit and
	add comments.
	* config/rs6000/rs6000.c (rs6000_option_override_internal): Add
	special handling for target option conflicts between dform
	options (-mpower9-dform, -mpower9-dform-vector,
	-mpower9-dform-scalar) and -mno-direct-move.

From-SVN: r246505

gcc/ChangeLog

+2017-03-27  Kelvin Nilsen  <kelvin@gcc.gnu.org>
+
+	PR target/80103
+	* config/rs6000/rs6000-c.c (rs6000_target_modify_macros): Edit and
+	add comments.
+	* config/rs6000/rs6000.c (rs6000_option_override_internal): Add
+	special handling for target option conflicts between dform
+	options (-mpower9-dform, -mpower9-dform-vector,
+	-mpower9-dform-scalar) and -mno-direct-move.
+
 2017-03-27  Richard Biener  <rguenther@suse.de>
 
 	PR tree-optimization/80181

gcc/config/rs6000/rs6000-c.c

@@ -429,6 +429,12 @@ rs6000_target_modify_macros (bool define_p, HOST_WIDE_INT flags,
   if ((flags & OPTION_MASK_POPCNTD) != 0)
     rs6000_define_or_undefine_macro (define_p, "_ARCH_PWR7");
   /* Note that the OPTION_MASK_DIRECT_MOVE flag is automatically
+     turned on in the following condition:
+     1. TARGET_P9_DFORM_SCALAR or TARGET_P9_DFORM_VECTOR are enabled
+        and OPTION_MASK_DIRECT_MOVE is not explicitly disabled.
+        Hereafter, the OPTION_MASK_DIRECT_MOVE flag is considered to
+        have been turned on explicitly.
+     Note that the OPTION_MASK_DIRECT_MOVE flag is automatically
      turned off in any of the following conditions:
      1. TARGET_HARD_FLOAT, TARGET_ALTIVEC, or TARGET_VSX is explicitly
 	disabled and OPTION_MASK_DIRECT_MOVE was not explicitly
@@ -473,7 +479,12 @@ rs6000_target_modify_macros (bool define_p, HOST_WIDE_INT flags,
       if (!flag_iso)
 	rs6000_define_or_undefine_macro (define_p, "__APPLE_ALTIVEC__");
     }
-  /* Note that the OPTION_MASK_VSX flag is automatically turned off in
+  /* Note that the OPTION_MASK_VSX flag is automatically turned on in
+     the following conditions:
+     1. TARGET_P8_VECTOR is explicitly turned on and the OPTION_MASK_VSX
+        was not explicitly turned off.  Hereafter, the OPTION_MASK_VSX
+        flag is considered to have been explicitly turned on.
+     Note that the OPTION_MASK_VSX flag is automatically turned off in
      the following conditions:
      1. The operating system does not support saving of AltiVec
 	registers (OS_MISSING_ALTIVEC).
@@ -507,6 +518,12 @@ rs6000_target_modify_macros (bool define_p, HOST_WIDE_INT flags,
       rs6000_define_or_undefine_macro (define_p, "__TM_FENCE__");
     }
   /* Note that the OPTION_MASK_P8_VECTOR flag is automatically turned
+     on in the following conditions:
+     1. TARGET_P9_VECTOR is explicitly turned on and
+        OPTION_MASK_P8_VECTOR is not explicitly turned off.
+        Hereafter, the OPTION_MASK_P8_VECTOR flag is considered to
+        have been turned off explicitly.
+     Note that the OPTION_MASK_P8_VECTOR flag is automatically turned
      off in the following conditions:
      1. If any of TARGET_HARD_FLOAT, TARGET_ALTIVEC, or TARGET_VSX
 	were turned off explicitly and OPTION_MASK_P8_VECTOR flag was
@@ -514,15 +531,24 @@ rs6000_target_modify_macros (bool define_p, HOST_WIDE_INT flags,
      2. If TARGET_ALTIVEC is turned off.  Hereafter, the
 	OPTION_MASK_P8_VECTOR flag is considered to have been turned off
 	explicitly.
-     3. If TARGET_VSX is turned off.  Hereafter, the OPTION_MASK_P8_VECTOR
-	flag is considered to have been turned off explicitly.  */
+     3. If TARGET_VSX is turned off and OPTION_MASK_P8_VECTOR was not
+        explicitly enabled.  If TARGET_VSX is explicitly enabled, the
+        OPTION_MASK_P8_VECTOR flag is hereafter also considered to
+	have been turned off explicitly.  */
   if ((flags & OPTION_MASK_P8_VECTOR) != 0)
     rs6000_define_or_undefine_macro (define_p, "__POWER8_VECTOR__");
   /* Note that the OPTION_MASK_P9_VECTOR flag is automatically turned
      off in the following conditions:
-     1. If TARGET_P8_VECTOR is turned off. Hereafter, the
-	OPTION_MASK_P9_VECTOR flag is considered to have been turned off
-	explicitly.  */
+     1. If TARGET_P8_VECTOR is turned off and OPTION_MASK_P9_VECTOR is
+        not turned on explicitly. Hereafter, if OPTION_MASK_P8_VECTOR
+        was turned on explicitly, the OPTION_MASK_P9_VECTOR flag is
+        also considered to have been turned off explicitly.
+     Note that the OPTION_MASK_P9_VECTOR is automatically turned on
+     in the following conditions:
+     1. If TARGET_P9_DFORM_SCALAR or TARGET_P9_DFORM_VECTOR and
+        OPTION_MASK_P9_VECTOR was not turned off explicitly.
+        Hereafter, THE OPTION_MASK_P9_VECTOR flag is considered to
+        have been turned on explicitly.  */
   if ((flags & OPTION_MASK_P9_VECTOR) != 0)
     rs6000_define_or_undefine_macro (define_p, "__POWER9_VECTOR__");
   /* Note that the OPTION_MASK_QUAD_MEMORY flag is automatically

gcc/config/rs6000/rs6000.c

@@ -4595,6 +4595,33 @@ rs6000_option_override_internal (bool global_init_p)
 	}
     }
 
+  if ((TARGET_P9_DFORM_SCALAR || TARGET_P9_DFORM_VECTOR)
+      && !TARGET_DIRECT_MOVE)
+    {
+      /* We prefer to not mention undocumented options in
+	 error messages.  However, if users have managed to select
+	 power9-dform without selecting direct-move, they
+	 already know about undocumented flags.  */
+      if ((rs6000_isa_flags_explicit & OPTION_MASK_DIRECT_MOVE)
+	  && ((rs6000_isa_flags_explicit & OPTION_MASK_P9_DFORM_VECTOR) ||
+	      (rs6000_isa_flags_explicit & OPTION_MASK_P9_DFORM_SCALAR) ||
+	      (TARGET_P9_DFORM_BOTH == 1)))
+	error ("-mpower9-dform, -mpower9-dform-vector, -mpower9-dform-scalar"
+	       " require -mdirect-move");
+      else if ((rs6000_isa_flags_explicit & OPTION_MASK_DIRECT_MOVE) == 0)
+	{
+	  rs6000_isa_flags |= OPTION_MASK_DIRECT_MOVE;
+	  rs6000_isa_flags_explicit |= OPTION_MASK_DIRECT_MOVE;
+	}
+      else
+	{
+	  rs6000_isa_flags &=
+	    ~(OPTION_MASK_P9_DFORM_SCALAR | OPTION_MASK_P9_DFORM_VECTOR);
+	  rs6000_isa_flags_explicit |=
+	    (OPTION_MASK_P9_DFORM_SCALAR | OPTION_MASK_P9_DFORM_VECTOR);
+	}
+    }
+
   if (TARGET_P9_DFORM_SCALAR && !TARGET_UPPER_REGS_DF)
     {
       /* We prefer to not mention undocumented options in

gcc/testsuite/ChangeLog

+2017-03-27  Kelvin Nilsen  <kelvin@gcc.gnu.org>
+
+	PR target/80103
+	* gcc.target/powerpc/pr80103-1.c: New test.
+
 2017-03-27  Richard Biener  <rguenther@suse.de>
 
 	PR tree-optimization/80181

gcc/testsuite/gcc.target/powerpc/pr80103-1.c

+/* { dg-do compile { target { powerpc*-*-* } } } */
+/* { dg-skip-if "do not override -mcpu" { powerpc*-*-* } { "-mcpu=*" } { "-mcpu=power9" } } */
+/* { dg-require-effective-target powerpc_p9vector_ok } */
+/* { dg-options "-mpower9-dform-vector -mno-direct-move" } */
+/* { dg-excess-errors "expect error due to conflicting target options" } */
+/* Since the error message is not associated with a particular line
+   number, we cannot use the dg-error directive and cannot specify a
+   regexp to describe the expected error message.  The expected error
+   message is: "-mpower9-dform, -mpower9-dform-vector,
+                -mpower9-dform-scalar require -mdirect-move" */
+
+int a;
+void b (__attribute__ ((__vector_size__ (16))) char c)
+{
+  a = ((__attributes__ ((__vector_size__ (2 * sizeof (long)))) long) c)[0];
+}