[pushed] testsuite: add additional option to force DSE execution [PR103662]

[Mikael Morin <morin-mikael@orange.fr>]

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I have just pushed the attached fix for two UNRESOLVED checks at 
-O0 that I hadn’t seen.

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From 6cc26f3037a18b9a958b4ac2a1363149a7fccd39 Mon Sep 17 00:00:00 2001
From: Mikael Morin <mikael@gcc.gnu.org>
Date: Mon, 25 Apr 2022 13:14:20 +0200
Subject: [pushed] =?UTF-8?q?testsuite:=C2=A0add=20additional=20option=20to?=
 =?UTF-8?q?=20force=20DSE=20execution=20[PR103662]?=
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This fixes a dump tree match check that is UNRESOLVED with the -O0
optimization option, as the optimization pass corresponding to the
dump file is not run at -O0, and the dump is not generated.

	PR fortran/103662

gcc/testsuite/ChangeLog:

	* gfortran.dg/unlimited_polymorphic_3.f03: Force execution of
	the DSE optimization pass.
---
 gcc/testsuite/gfortran.dg/unlimited_polymorphic_3.f03 | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/testsuite/gfortran.dg/unlimited_polymorphic_3.f03 b/gcc/testsuite/gfortran.dg/unlimited_polymorphic_3.f03
index 780d68cdd87..4104de6ac68 100644
--- a/gcc/testsuite/gfortran.dg/unlimited_polymorphic_3.f03
+++ b/gcc/testsuite/gfortran.dg/unlimited_polymorphic_3.f03
@@ -1,5 +1,5 @@
 ! { dg-do run }
-! { dg-additional-options "-fdump-tree-dse-details" }
+! { dg-additional-options "-ftree-dse -fdump-tree-dse-details" }
 !
 ! Check that pointer assignments allowed by F2003:C717
 ! work and check null initialization of CLASS(*) pointers.
-- 
2.35.1