The failures in this PR were from forcing { dg-do run } even when
vect.exp chooses options that are incompatible with the runtime.
The default vect.exp behaviour is to execute when possible, so there's
no need for a dg-do at all.

The patch removes other unconditional { dg-do run }s too.  Many of them
were already failing in the same way.

Also, the dg-do run condition in vect-reduc-or* seems unnecessary:
the test should run correctly whatever happens, and the scan tests
are already guarded properly.

Tested on aarch64-linux-gnu, arm-non-eabi, x86_64-linux-gnu and
powerpc64le-linux-gnu.  OK to install?

Richard


2018-01-23  Richard Sandiford  <richard.sandif...@linaro.org>

gcc/testsuite/
        PR testsuite/83889
        * gcc.dg/vect/pr79920.c: Remove explicit dg-do run.
        * gcc.dg/vect/pr80631-1.c: Likewise.
        * gcc.dg/vect/pr80631-2.c: Likewise.
        * gcc.dg/vect/pr81410.c: Likewise.
        * gcc.dg/vect/pr81633.c: Likewise.
        * gcc.dg/vect/pr81815.c: Likewise.
        * gcc.dg/vect/pr82108.c: Likewise.
        * gcc.dg/vect/pr83857.c: Likewise.
        * gcc.dg/vect/vect-alias-check-8.c: Likewise.
        * gcc.dg/vect/vect-alias-check-9.c: Likewise.
        * gcc.dg/vect/vect-alias-check-10.c: Likewise.
        * gcc.dg/vect/vect-alias-check-11.c: Likewise.
        * gcc.dg/vect/vect-alias-check-12.c: Likewise.
        * gcc.dg/vect/vect-reduc-11.c: Likewise.
        * gcc.dg/vect/vect-tail-nomask-1.c: Likewise.
        * gcc.dg/vect/vect-reduc-in-order-1.c: Remove dg-do run and use
        dg-xfail-run-if instead.
        * gcc.dg/vect/vect-reduc-in-order-2.c: Likewise.
        * gcc.dg/vect/vect-reduc-in-order-3.c: Likewise.
        * gcc.dg/vect/vect-reduc-in-order-4.c: Likewise.
        * gcc.dg/vect/vect-reduc-or_1.c: Remove conditional dg-do run.
        * gcc.dg/vect/vect-reduc-or_2.c: Likewise.

Index: gcc/testsuite/gcc.dg/vect/pr79920.c
===================================================================
--- gcc/testsuite/gcc.dg/vect/pr79920.c 2018-01-15 12:38:45.039094423 +0000
+++ gcc/testsuite/gcc.dg/vect/pr79920.c 2018-01-23 11:29:38.977575495 +0000
@@ -1,4 +1,3 @@
-/* { dg-do run } */
 /* { dg-additional-options "-O3 -fno-fast-math" } */
 
 #include "tree-vect.h"
Index: gcc/testsuite/gcc.dg/vect/pr80631-1.c
===================================================================
--- gcc/testsuite/gcc.dg/vect/pr80631-1.c       2018-01-13 17:59:52.122334084 
+0000
+++ gcc/testsuite/gcc.dg/vect/pr80631-1.c       2018-01-23 11:29:38.977575495 
+0000
@@ -1,5 +1,4 @@
 /* PR tree-optimization/80631 */
-/* { dg-do run } */
 
 #include "tree-vect.h"
 
Index: gcc/testsuite/gcc.dg/vect/pr80631-2.c
===================================================================
--- gcc/testsuite/gcc.dg/vect/pr80631-2.c       2017-12-14 00:04:52.323446529 
+0000
+++ gcc/testsuite/gcc.dg/vect/pr80631-2.c       2018-01-23 11:29:38.977575495 
+0000
@@ -1,5 +1,4 @@
 /* PR tree-optimization/80631 */
-/* { dg-do run } */
 
 #include "tree-vect.h"
 
Index: gcc/testsuite/gcc.dg/vect/pr81410.c
===================================================================
--- gcc/testsuite/gcc.dg/vect/pr81410.c 2017-07-27 10:37:55.334036950 +0100
+++ gcc/testsuite/gcc.dg/vect/pr81410.c 2018-01-23 11:29:38.977575495 +0000
@@ -1,4 +1,3 @@
-/* { dg-do run } */
 /* { dg-require-effective-target vect_long_long } */
 
 #include "tree-vect.h"
Index: gcc/testsuite/gcc.dg/vect/pr81633.c
===================================================================
--- gcc/testsuite/gcc.dg/vect/pr81633.c 2017-08-03 10:40:54.014105333 +0100
+++ gcc/testsuite/gcc.dg/vect/pr81633.c 2018-01-23 11:29:38.977575495 +0000
@@ -1,5 +1,3 @@
-/* { dg-do run } */
-
 static double identity[4][4] = {{1, 0, 0, 0},
                                 {0, 1, 0, 0},
                                 {0, 0, 1, 0},
Index: gcc/testsuite/gcc.dg/vect/pr81815.c
===================================================================
--- gcc/testsuite/gcc.dg/vect/pr81815.c 2017-08-16 08:50:54.197549943 +0100
+++ gcc/testsuite/gcc.dg/vect/pr81815.c 2018-01-23 11:29:38.978575453 +0000
@@ -1,5 +1,3 @@
-/* { dg-do run } */
-
 int __attribute__ ((noinline, noclone))
 f (int *x, int n)
 {
Index: gcc/testsuite/gcc.dg/vect/pr82108.c
===================================================================
--- gcc/testsuite/gcc.dg/vect/pr82108.c 2017-09-06 20:47:38.380589062 +0100
+++ gcc/testsuite/gcc.dg/vect/pr82108.c 2018-01-23 11:29:38.978575453 +0000
@@ -1,4 +1,3 @@
-/* { dg-do run } */
 /* { dg-require-effective-target vect_float } */
 
 #include "tree-vect.h"
Index: gcc/testsuite/gcc.dg/vect/pr83857.c
===================================================================
--- gcc/testsuite/gcc.dg/vect/pr83857.c 2018-01-16 15:13:24.937622282 +0000
+++ gcc/testsuite/gcc.dg/vect/pr83857.c 2018-01-23 11:29:38.978575453 +0000
@@ -1,4 +1,3 @@
-/* { dg-do run } */
 /* { dg-additional-options "-ffast-math" } */
 
 #define N 100
Index: gcc/testsuite/gcc.dg/vect/vect-alias-check-8.c
===================================================================
--- gcc/testsuite/gcc.dg/vect/vect-alias-check-8.c      2018-01-13 
18:02:00.945360390 +0000
+++ gcc/testsuite/gcc.dg/vect/vect-alias-check-8.c      2018-01-23 
11:29:38.978575453 +0000
@@ -1,5 +1,3 @@
-/* { dg-do run } */
-
 #define N 200
 #define DIST 32
 
Index: gcc/testsuite/gcc.dg/vect/vect-alias-check-9.c
===================================================================
--- gcc/testsuite/gcc.dg/vect/vect-alias-check-9.c      2018-01-13 
18:02:00.945360390 +0000
+++ gcc/testsuite/gcc.dg/vect/vect-alias-check-9.c      2018-01-23 
11:29:38.978575453 +0000
@@ -1,5 +1,3 @@
-/* { dg-do run } */
-
 #define N 200
 #define M 4
 
Index: gcc/testsuite/gcc.dg/vect/vect-alias-check-10.c
===================================================================
--- gcc/testsuite/gcc.dg/vect/vect-alias-check-10.c     2018-01-13 
18:02:00.944360429 +0000
+++ gcc/testsuite/gcc.dg/vect/vect-alias-check-10.c     2018-01-23 
11:29:38.978575453 +0000
@@ -1,5 +1,3 @@
-/* { dg-do run } */
-
 #define N 87
 #define M 6
 
Index: gcc/testsuite/gcc.dg/vect/vect-alias-check-11.c
===================================================================
--- gcc/testsuite/gcc.dg/vect/vect-alias-check-11.c     2018-01-13 
18:02:00.944360429 +0000
+++ gcc/testsuite/gcc.dg/vect/vect-alias-check-11.c     2018-01-23 
11:29:38.978575453 +0000
@@ -1,5 +1,3 @@
-/* { dg-do run } */
-
 #define N 87
 #define M 6
 
Index: gcc/testsuite/gcc.dg/vect/vect-alias-check-12.c
===================================================================
--- gcc/testsuite/gcc.dg/vect/vect-alias-check-12.c     2018-01-13 
18:02:00.945360390 +0000
+++ gcc/testsuite/gcc.dg/vect/vect-alias-check-12.c     2018-01-23 
11:29:38.978575453 +0000
@@ -1,5 +1,3 @@
-/* { dg-do run } */
-
 #define N 87
 #define M 7
 
Index: gcc/testsuite/gcc.dg/vect/vect-reduc-11.c
===================================================================
--- gcc/testsuite/gcc.dg/vect/vect-reduc-11.c   2017-07-27 10:37:55.334036950 
+0100
+++ gcc/testsuite/gcc.dg/vect/vect-reduc-11.c   2018-01-23 11:29:38.979575410 
+0000
@@ -1,4 +1,3 @@
-/* { dg-do run } */
 /* { dg-require-effective-target vect_int } */
 
 #include "tree-vect.h"
Index: gcc/testsuite/gcc.dg/vect/vect-tail-nomask-1.c
===================================================================
--- gcc/testsuite/gcc.dg/vect/vect-tail-nomask-1.c      2018-01-16 
09:27:09.046519360 +0000
+++ gcc/testsuite/gcc.dg/vect/vect-tail-nomask-1.c      2018-01-23 
11:29:38.979575410 +0000
@@ -1,4 +1,3 @@
-/* { dg-do run } */
 /* { dg-require-weak "" } */
 /* { dg-skip-if "No undefined weak" { hppa*-*-hpux* && { ! lp64 } } } */
 /* { dg-skip-if "No undefined weak" { nvptx-*-* } } */
Index: gcc/testsuite/gcc.dg/vect/vect-reduc-in-order-1.c
===================================================================
--- gcc/testsuite/gcc.dg/vect/vect-reduc-in-order-1.c   2018-01-13 
18:01:15.294116882 +0000
+++ gcc/testsuite/gcc.dg/vect/vect-reduc-in-order-1.c   2018-01-23 
11:29:38.979575410 +0000
@@ -1,4 +1,4 @@
-/* { dg-do run { xfail { { i?86-*-* x86_64-*-* } && ia32 } } } */
+/* { dg-xfail-run-if "" { { i?86-*-* x86_64-*-* } && ia32 } } */
 /* { dg-require-effective-target vect_double } */
 /* { dg-add-options ieee } */
 /* { dg-additional-options "-fno-fast-math" } */
Index: gcc/testsuite/gcc.dg/vect/vect-reduc-in-order-2.c
===================================================================
--- gcc/testsuite/gcc.dg/vect/vect-reduc-in-order-2.c   2018-01-13 
18:01:15.294116882 +0000
+++ gcc/testsuite/gcc.dg/vect/vect-reduc-in-order-2.c   2018-01-23 
11:29:38.979575410 +0000
@@ -1,4 +1,4 @@
-/* { dg-do run { xfail { { i?86-*-* x86_64-*-* } && ia32 } } } */
+/* { dg-xfail-run-if "" { { i?86-*-* x86_64-*-* } && ia32 } } */
 /* { dg-require-effective-target vect_double } */
 /* { dg-add-options ieee } */
 /* { dg-additional-options "-fno-fast-math" } */
Index: gcc/testsuite/gcc.dg/vect/vect-reduc-in-order-3.c
===================================================================
--- gcc/testsuite/gcc.dg/vect/vect-reduc-in-order-3.c   2018-01-13 
18:01:15.294116882 +0000
+++ gcc/testsuite/gcc.dg/vect/vect-reduc-in-order-3.c   2018-01-23 
11:29:38.979575410 +0000
@@ -1,4 +1,4 @@
-/* { dg-do run { xfail { { i?86-*-* x86_64-*-* } && ia32 } } } */
+/* { dg-xfail-run-if "" { { i?86-*-* x86_64-*-* } && ia32 } } */
 /* { dg-require-effective-target vect_double } */
 /* { dg-add-options ieee } */
 /* { dg-additional-options "-fno-fast-math" } */
Index: gcc/testsuite/gcc.dg/vect/vect-reduc-in-order-4.c
===================================================================
--- gcc/testsuite/gcc.dg/vect/vect-reduc-in-order-4.c   2018-01-13 
18:01:15.294116882 +0000
+++ gcc/testsuite/gcc.dg/vect/vect-reduc-in-order-4.c   2018-01-23 
11:29:38.979575410 +0000
@@ -1,4 +1,4 @@
-/* { dg-do run { xfail { { i?86-*-* x86_64-*-* } && ia32 } } } */
+/* { dg-xfail-run-if "" { { i?86-*-* x86_64-*-* } && ia32 } } */
 /* { dg-require-effective-target vect_double } */
 /* { dg-add-options ieee } */
 /* { dg-additional-options "-fno-fast-math" } */
Index: gcc/testsuite/gcc.dg/vect/vect-reduc-or_1.c
===================================================================
--- gcc/testsuite/gcc.dg/vect/vect-reduc-or_1.c 2018-01-13 17:58:35.049273040 
+0000
+++ gcc/testsuite/gcc.dg/vect/vect-reduc-or_1.c 2018-01-23 11:29:38.979575410 
+0000
@@ -1,5 +1,3 @@
-/* { dg-do run { target { whole_vector_shift || vect_logical_reduc } } } */
-
 /* Write a reduction loop to be reduced using vector shifts.  */
 
 #include "tree-vect.h"
Index: gcc/testsuite/gcc.dg/vect/vect-reduc-or_2.c
===================================================================
--- gcc/testsuite/gcc.dg/vect/vect-reduc-or_2.c 2018-01-13 17:58:35.049273040 
+0000
+++ gcc/testsuite/gcc.dg/vect/vect-reduc-or_2.c 2018-01-23 11:29:38.979575410 
+0000
@@ -1,5 +1,3 @@
-/* { dg-do run { target { whole_vector_shift || vect_logical_reduc } } } */
-
 /* Write a reduction loop to be reduced using vector shifts and folded.  */
 
 #include "tree-vect.h"

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