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gcc/SOURCES/gcc11-fortran-fdec-sequence...

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