rs6000-c.c (altivec_overloaded_builtins): Change behavior of vec_pack (vector double...

gcc/ChangeLog:

2018-06-22  Kelvin Nilsen  <kelvin@gcc.gnu.org>

	* config/rs6000/rs6000-c.c (altivec_overloaded_builtins): Change
	behavior of vec_pack (vector double, vector double) to match
	behavior of vec_float2 (vector double, vector double).

gcc/testsuite/ChangeLog:

2018-06-22  Kelvin Nilsen  <kelvin@gcc.gnu.org>

	* gcc.target/powerpc/builtins-3-p8.c (test_pack_float): Remove
	this test.
	* gcc.target/powerpc/builtins-9.c: New test.
	* gcc.target/powerpc/fold-vec-pack-double.c: Modify dg directives
	to expect different code generation on big-endian vs.
	little-endian targets.

From-SVN: r261974

gcc/ChangeLog

+2018-06-22  Kelvin Nilsen  <kelvin@gcc.gnu.org>
+
+	* config/rs6000/rs6000-c.c (altivec_overloaded_builtins): Change
+	behavior of vec_pack (vector double, vector double) to match
+	behavior of vec_float2 (vector double, vector double).
+
 2018-06-22  Olivier Hainque  <hainque@adacore.com>
 
 	* gimplify.c (gimplify_function_tree): Prevent creation

gcc/config/rs6000/rs6000-c.c

@@ -2425,7 +2425,7 @@ const struct altivec_builtin_types altivec_overloaded_builtins[] = {
     RS6000_BTI_unsigned_V4SI, RS6000_BTI_unsigned_V2DI, RS6000_BTI_unsigned_V2DI, 0 },
   { ALTIVEC_BUILTIN_VEC_PACK, P8V_BUILTIN_VPKUDUM,
     RS6000_BTI_bool_V4SI, RS6000_BTI_bool_V2DI, RS6000_BTI_bool_V2DI, 0 },
-  { ALTIVEC_BUILTIN_VEC_PACK, P8V_BUILTIN_VPKUDUM,
+  { ALTIVEC_BUILTIN_VEC_PACK, P8V_BUILTIN_FLOAT2_V2DF,
     RS6000_BTI_V4SF, RS6000_BTI_V2DF, RS6000_BTI_V2DF, 0 },
 
   { P8V_BUILTIN_VEC_NEG, P8V_BUILTIN_NEG_V16QI,

gcc/testsuite/ChangeLog

+2018-06-22  Kelvin Nilsen  <kelvin@gcc.gnu.org>
+
+	* gcc.target/powerpc/builtins-3-p8.c (test_pack_float): Remove
+	this test.
+	* gcc.target/powerpc/builtins-9.c: New test.
+	* gcc.target/powerpc/fold-vec-pack-double.c: Modify dg directives
+	to expect different code generation on big-endian vs.
+	little-endian targets.
+
 2018-06-22  Tom de Vries  <tdevries@suse.de>
 
 	* g++.dg/guality/guality.exp (guality_gdb_name): Default to

gcc/testsuite/gcc.target/powerpc/builtins-3-p8.c

@@ -11,12 +11,6 @@ test_eq_long_long (vector bool long long x, vector bool long long y)
 	return vec_cmpeq (x, y);
 }
 
-vector float
-test_pack_float (vector double x, vector double y)
-{
-  return vec_pack (x, y);
-}
-
 vector unsigned char
 test_vsi_packs_vusi_vusi (vector unsigned short x,
                           vector unsigned short y)
@@ -214,7 +208,6 @@ test_neg_double (vector double x)
 /* Expected test results:
 
      test_eq_long_long                         1 vcmpequd inst
-     test_pack_float                           1 vpkudum inst
      test_vsi_packs_vsll_vsll                  1 vpksdss
      test_vui_packs_vull_vull                  1 vpkudus
      test_vui_packs_vssi_vssi                  1 vpkshss
@@ -241,7 +234,6 @@ test_neg_double (vector double x)
  */
 
 /* { dg-final { scan-assembler-times "vcmpequd" 1 } } */
-/* { dg-final { scan-assembler-times "vpkudum"  1 } } */
 /* { dg-final { scan-assembler-times "vpksdss"  1 } } */
 /* { dg-final { scan-assembler-times "vpkudus"  2 } } */  
 /* { dg-final { scan-assembler-times "vpkuhus"  2 } } */

gcc/testsuite/gcc.target/powerpc/builtins-9.c

+/* { dg-do compile } */
+/* { dg-require-effective-target powerpc_p8vector_ok } */
+/* { dg-skip-if "do not override -mcpu" { powerpc*-*-* } { "-mcpu=*" } { "-mcpu=power8" } } */
+/* { dg-options "-maltivec -mcpu=power8 -O3" } */
+
+#include <altivec.h>
+
+vector float
+test_pack_float (vector double x, vector double y)
+{
+  return vec_pack (x, y);
+}
+
+/* { dg-final { scan-assembler-times "vmrgew" 1 { target be } } } */
+/* { dg-final { scan-assembler-times "vmrgow"  1 { target le } } } */
+
+/* { dg-final { scan-assembler-times "xvcvdpsp"  2 } } */
+/* { dg-final { scan-assembler-times "xxpermdi"  2 } } */
+

gcc/testsuite/gcc.target/powerpc/fold-vec-pack-double.c

@@ -3,6 +3,7 @@
 
 /* { dg-do compile } */
 /* { dg-require-effective-target powerpc_p8vector_ok } */
+/* { dg-skip-if "do not override -mcpu" { powerpc*-*-* } { "-mcpu=*" } { "-mcpu=power8" } } */
 /* { dg-options "-mvsx -mpower8-vector -O2" } */
 
 #include <altivec.h>
@@ -15,4 +16,5 @@ test_pack (vector double vd2, vector double vd3)
   return vec_pack (vd2, vd3);
 }
 
-/* { dg-final { scan-assembler-times "vpkudum" 1 } } */
+/* { dg-final { scan-assembler-times "vmrgew" 1 { target be } } } */
+/* { dg-final { scan-assembler-times "vmrgow"  1 { target le } } } */