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From bb76446db10c21860a4e19569ce3e350d8a2b59f Mon Sep 17 00:00:00 2001
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From: Mark Eggleston <markeggleston@gcc.gnu.org>
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Date: Fri, 22 Jan 2021 15:00:44 +0000
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Subject: [PATCH 09/10] Add the SEQUENCE attribute by default if it's not
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present.
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Use -fdec-sequence to enable this feature. Also enabled by -fdec.
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---
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gcc/fortran/lang.opt | 4 ++
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gcc/fortran/options.c | 1 +
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gcc/fortran/resolve.c | 13 ++++-
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...dd_SEQUENCE_to_COMMON_block_by_default_1.f | 57 +++++++++++++++++++
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...dd_SEQUENCE_to_COMMON_block_by_default_2.f | 57 +++++++++++++++++++
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...dd_SEQUENCE_to_COMMON_block_by_default_3.f | 57 +++++++++++++++++++
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6 files changed, 186 insertions(+), 3 deletions(-)
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create mode 100644 gcc/testsuite/gfortran.dg/dec_add_SEQUENCE_to_COMMON_block_by_default_1.f
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create mode 100644 gcc/testsuite/gfortran.dg/dec_add_SEQUENCE_to_COMMON_block_by_default_2.f
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create mode 100644 gcc/testsuite/gfortran.dg/dec_add_SEQUENCE_to_COMMON_block_by_default_3.f
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diff --git a/gcc/fortran/lang.opt b/gcc/fortran/lang.opt
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index 4ca2f93f2df..019c798cf09 100644
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--- a/gcc/fortran/lang.opt
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+++ b/gcc/fortran/lang.opt
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@@ -509,6 +509,10 @@ fdec-promotion
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Fortran Var(flag_dec_promotion)
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Add support for type promotion in intrinsic arguments.
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+fdec-sequence
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+Fortran Var(flag_dec_sequence)
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+Add the SEQUENCE attribute by default if it's not present.
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+
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fdec-structure
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Fortran Var(flag_dec_structure)
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Enable support for DEC STRUCTURE/RECORD.
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diff --git a/gcc/fortran/options.c b/gcc/fortran/options.c
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index 15079c7e95a..050f56fdc25 100644
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--- a/gcc/fortran/options.c
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+++ b/gcc/fortran/options.c
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@@ -83,6 +83,7 @@ set_dec_flags (int value)
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SET_BITFLAG (flag_dec_override_kind, value, value);
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SET_BITFLAG (flag_dec_non_logical_if, value, value);
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SET_BITFLAG (flag_dec_promotion, value, value);
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+ SET_BITFLAG (flag_dec_sequence, value, value);
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}
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/* Finalize DEC flags. */
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diff --git a/gcc/fortran/resolve.c b/gcc/fortran/resolve.c
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index 07dd039f3bf..fe7d0cc5944 100644
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--- a/gcc/fortran/resolve.c
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+++ b/gcc/fortran/resolve.c
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@@ -978,9 +978,16 @@ resolve_common_vars (gfc_common_head *common_block, bool named_common)
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if (!(csym->ts.u.derived->attr.sequence
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|| csym->ts.u.derived->attr.is_bind_c))
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- gfc_error_now ("Derived type variable %qs in COMMON at %L "
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- "has neither the SEQUENCE nor the BIND(C) "
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- "attribute", csym->name, &csym->declared_at);
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+ {
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+ if (flag_dec_sequence)
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+ /* Assume sequence. */
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+ csym->ts.u.derived->attr.sequence = 1;
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+ else
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+ gfc_error_now ("Derived type variable '%s' in COMMON at %L "
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+ "has neither the SEQUENCE nor the BIND(C) "
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+ "attribute", csym->name, &csym->declared_at);
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+ }
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+
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if (csym->ts.u.derived->attr.alloc_comp)
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gfc_error_now ("Derived type variable %qs in COMMON at %L "
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"has an ultimate component that is "
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diff --git a/gcc/testsuite/gfortran.dg/dec_add_SEQUENCE_to_COMMON_block_by_default_1.f b/gcc/testsuite/gfortran.dg/dec_add_SEQUENCE_to_COMMON_block_by_default_1.f
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new file mode 100644
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index 00000000000..fe7b39625eb
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--- /dev/null
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+++ b/gcc/testsuite/gfortran.dg/dec_add_SEQUENCE_to_COMMON_block_by_default_1.f
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@@ -0,0 +1,57 @@
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+! { dg-do run }
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+! { dg-options "-fdec" }
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+!
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+! Test add default SEQUENCE attribute derived types appearing in
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+! COMMON blocks and EQUIVALENCE statements.
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+!
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+! Contributed by Francisco Redondo Marchena <francisco.marchena@codethink.co.uk>
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+! Modified by Mark Eggleston <mark.eggleston@codethink.com>
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+!
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+ MODULE SEQ
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+ TYPE STRUCT1
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+ INTEGER*4 ID
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+ INTEGER*4 TYPE
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+ INTEGER*8 DEFVAL
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+ CHARACTER*(4) NAME
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+ LOGICAL*1 NIL
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+ END TYPE STRUCT1
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+ END MODULE
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+
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+ SUBROUTINE A
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+ USE SEQ
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+ TYPE (STRUCT1) S
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+ COMMON /BLOCK1/ S
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+ IF (S%ID.NE.5) STOP 1
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+ IF (S%TYPE.NE.1000) STOP 2
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+ IF (S%DEFVAL.NE.-99) STOP 3
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+ IF (S%NAME.NE."JANE") STOP 4
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+ IF (S%NIL.NEQV..FALSE.) STOP 5
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+ END SUBROUTINE
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+
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+ PROGRAM sequence_att_common
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+ USE SEQ
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+ IMPLICIT NONE
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+ TYPE (STRUCT1) S1
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+ TYPE (STRUCT1) S2
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+ TYPE (STRUCT1) S3
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+
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+ EQUIVALENCE (S1,S2)
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+ COMMON /BLOCK1/ S3
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+
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+ S1%ID = 5
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+ S1%TYPE = 1000
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+ S1%DEFVAL = -99
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+ S1%NAME = "JANE"
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+ S1%NIL = .FALSE.
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+
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+ IF (S2%ID.NE.5) STOP 1
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+ IF (S2%TYPE.NE.1000) STOP 2
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+ IF (S2%DEFVAL.NE.-99) STOP 3
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+ IF (S2%NAME.NE."JANE") STOP 4
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+ IF (S2%NIL.NEQV..FALSE.) STOP 5
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+
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+ S3 = S1
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+
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+ CALL A
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+
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+ END
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diff --git a/gcc/testsuite/gfortran.dg/dec_add_SEQUENCE_to_COMMON_block_by_default_2.f b/gcc/testsuite/gfortran.dg/dec_add_SEQUENCE_to_COMMON_block_by_default_2.f
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new file mode 100644
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index 00000000000..83512f0f3a2
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--- /dev/null
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+++ b/gcc/testsuite/gfortran.dg/dec_add_SEQUENCE_to_COMMON_block_by_default_2.f
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@@ -0,0 +1,57 @@
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+! { dg-do run }
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+! { dg-options "-fdec-sequence" }
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+!
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+! Test add default SEQUENCE attribute derived types appearing in
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+! COMMON blocks and EQUIVALENCE statements.
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+!
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+! Contributed by Francisco Redondo Marchena <francisco.marchena@codethink.co.uk>
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+! Modified by Mark Eggleston <mark.eggleston@codethink.com>
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+!
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+ MODULE SEQ
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+ TYPE STRUCT1
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+ INTEGER*4 ID
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+ INTEGER*4 TYPE
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+ INTEGER*8 DEFVAL
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+ CHARACTER*(4) NAME
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+ LOGICAL*1 NIL
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+ END TYPE STRUCT1
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+ END MODULE
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+
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+ SUBROUTINE A
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+ USE SEQ
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+ TYPE (STRUCT1) S
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+ COMMON /BLOCK1/ S
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+ IF (S%ID.NE.5) STOP 1
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+ IF (S%TYPE.NE.1000) STOP 2
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+ IF (S%DEFVAL.NE.-99) STOP 3
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+ IF (S%NAME.NE."JANE") STOP 4
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+ IF (S%NIL.NEQV..FALSE.) STOP 5
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+ END SUBROUTINE
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+
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+ PROGRAM sequence_att_common
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+ USE SEQ
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+ IMPLICIT NONE
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+ TYPE (STRUCT1) S1
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+ TYPE (STRUCT1) S2
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+ TYPE (STRUCT1) S3
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+
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+ EQUIVALENCE (S1,S2)
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+ COMMON /BLOCK1/ S3
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+
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+ S1%ID = 5
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+ S1%TYPE = 1000
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+ S1%DEFVAL = -99
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+ S1%NAME = "JANE"
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+ S1%NIL = .FALSE.
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+
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+ IF (S2%ID.NE.5) STOP 1
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+ IF (S2%TYPE.NE.1000) STOP 2
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+ IF (S2%DEFVAL.NE.-99) STOP 3
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+ IF (S2%NAME.NE."JANE") STOP 4
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+ IF (S2%NIL.NEQV..FALSE.) STOP 5
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+
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+ S3 = S1
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+
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+ CALL A
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+
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+ END
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diff --git a/gcc/testsuite/gfortran.dg/dec_add_SEQUENCE_to_COMMON_block_by_default_3.f b/gcc/testsuite/gfortran.dg/dec_add_SEQUENCE_to_COMMON_block_by_default_3.f
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new file mode 100644
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index 00000000000..26cd59f9090
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--- /dev/null
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+++ b/gcc/testsuite/gfortran.dg/dec_add_SEQUENCE_to_COMMON_block_by_default_3.f
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@@ -0,0 +1,57 @@
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+! { dg-do compile }
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+! { dg-options "-fdec -fno-dec-sequence" }
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+!
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+! Test add default SEQUENCE attribute derived types appearing in
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+! COMMON blocks and EQUIVALENCE statements.
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+!
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+! Contributed by Francisco Redondo Marchena <francisco.marchena@codethink.co.uk>
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+! Modified by Mark Eggleston <mark.eggleston@codethink.com>
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+!
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+ MODULE SEQ
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+ TYPE STRUCT1
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+ INTEGER*4 ID
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+ INTEGER*4 TYPE
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+ INTEGER*8 DEFVAL
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+ CHARACTER*(4) NAME
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+ LOGICAL*1 NIL
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+ END TYPE STRUCT1
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+ END MODULE
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+
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+ SUBROUTINE A
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+ USE SEQ
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+ TYPE (STRUCT1) S ! { dg-error "Derived type variable" }
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+ COMMON /BLOCK1/ S
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+ IF (S%ID.NE.5) STOP 1
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+ IF (S%TYPE.NE.1000) STOP 2
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+ IF (S%DEFVAL.NE.-99) STOP 3
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+ IF (S%NAME.NE."JANE") STOP 4
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+ IF (S%NIL.NEQV..FALSE.) STOP 5
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+ END SUBROUTINE
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+
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+ PROGRAM sequence_att_common
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+ USE SEQ
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+ IMPLICIT NONE
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+ TYPE (STRUCT1) S1
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+ TYPE (STRUCT1) S2
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+ TYPE (STRUCT1) S3 ! { dg-error "Derived type variable" }
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+
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+ EQUIVALENCE (S1,S2) ! { dg-error "Derived type variable" }
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+ COMMON /BLOCK1/ S3
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+
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+ S1%ID = 5
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+ S1%TYPE = 1000
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+ S1%DEFVAL = -99
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+ S1%NAME = "JANE"
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+ S1%NIL = .FALSE.
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+
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+ IF (S2%ID.NE.5) STOP 1
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+ IF (S2%TYPE.NE.1000) STOP 2
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+ IF (S2%DEFVAL.NE.-99) STOP 3
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+ IF (S2%NAME.NE."JANE") STOP 4
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+ IF (S2%NIL.NEQV..FALSE.) STOP 5
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+
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+ S3 = S1
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+
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+ CALL A
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+
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+ END
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--
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2.27.0
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