From 786869fd62813e80da9b6545a295d53c36275c19 Mon Sep 17 00:00:00 2001
From: Mark Eggleston <markeggleston@gcc.gnu.org>
Date: Fri, 22 Jan 2021 13:12:14 +0000
Subject: [PATCH 06/10] Allow string length and kind to be specified on a per
variable basis.
This allows kind/length to be mixed with array specification in
declarations.
e.g.
INTEGER*4 x*2, y*8
CHARACTER names*20(10)
REAL v(100)*8, vv*4(50)
The per-variable size overrides the kind or length specified for the type.
Use -fdec-override-kind to enable. Also enabled by -fdec.
Note: this feature is a merger of two previously separate features.
Now accepts named constants as kind parameters:
INTEGER A
PARAMETER (A=2)
INTEGER B*(A)
Contributed by Mark Eggleston <mark.eggleston@codethink.com>
Now rejects invalid kind parameters and prints error messages:
INTEGER X*3
caused an internal compiler error.
Contributed by Mark Eggleston <mark.eggleston@codethink.com>
---
gcc/fortran/decl.cc | 156 ++++++++++++++----
gcc/fortran/lang.opt | 4 +
gcc/fortran/options.cc | 1 +
.../dec_mixed_char_array_declaration_1.f | 13 ++
.../dec_mixed_char_array_declaration_2.f | 13 ++
.../dec_mixed_char_array_declaration_3.f | 13 ++
.../gfortran.dg/dec_spec_in_variable_1.f | 31 ++++
.../gfortran.dg/dec_spec_in_variable_2.f | 31 ++++
.../gfortran.dg/dec_spec_in_variable_3.f | 31 ++++
.../gfortran.dg/dec_spec_in_variable_4.f | 14 ++
.../gfortran.dg/dec_spec_in_variable_5.f | 19 +++
.../gfortran.dg/dec_spec_in_variable_6.f | 19 +++
.../gfortran.dg/dec_spec_in_variable_7.f | 15 ++
.../gfortran.dg/dec_spec_in_variable_8.f | 14 ++
14 files changed, 340 insertions(+), 34 deletions(-)
create mode 100644 gcc/testsuite/gfortran.dg/dec_mixed_char_array_declaration_1.f
create mode 100644 gcc/testsuite/gfortran.dg/dec_mixed_char_array_declaration_2.f
create mode 100644 gcc/testsuite/gfortran.dg/dec_mixed_char_array_declaration_3.f
create mode 100644 gcc/testsuite/gfortran.dg/dec_spec_in_variable_1.f
create mode 100644 gcc/testsuite/gfortran.dg/dec_spec_in_variable_2.f
create mode 100644 gcc/testsuite/gfortran.dg/dec_spec_in_variable_3.f
create mode 100644 gcc/testsuite/gfortran.dg/dec_spec_in_variable_4.f
create mode 100644 gcc/testsuite/gfortran.dg/dec_spec_in_variable_5.f
create mode 100644 gcc/testsuite/gfortran.dg/dec_spec_in_variable_6.f
create mode 100644 gcc/testsuite/gfortran.dg/dec_spec_in_variable_7.f
create mode 100644 gcc/testsuite/gfortran.dg/dec_spec_in_variable_8.f
diff --git a/gcc/fortran/decl.cc b/gcc/fortran/decl.cc
index 5c8c1b7981b..f7dc9d8263d 100644
--- a/gcc/fortran/decl.cc
+++ b/gcc/fortran/decl.cc
@@ -1213,6 +1213,54 @@ syntax:
return MATCH_ERROR;
}
+/* This matches the nonstandard kind given after a variable name, like:
+ INTEGER x*2, y*4
+ The per-variable kind will override any kind given in the type
+ declaration.
+*/
+
+static match
+match_per_symbol_kind (int *length)
+{
+ match m;
+ gfc_expr *expr = NULL;
+
+ m = gfc_match_char ('*');
+ if (m != MATCH_YES)
+ return m;
+
+ m = gfc_match_small_literal_int (length, NULL);
+ if (m == MATCH_YES || m == MATCH_ERROR)
+ return m;
+
+ if (gfc_match_char ('(') == MATCH_NO)
+ return MATCH_ERROR;
+
+ m = gfc_match_expr (&expr);
+ if (m == MATCH_YES)
+ {
+ m = MATCH_ERROR; // Assume error
+ if (gfc_expr_check_typed (expr, gfc_current_ns, false))
+ {
+ if ((expr->expr_type == EXPR_CONSTANT)
+ && (expr->ts.type == BT_INTEGER))
+ {
+ *length = mpz_get_si(expr->value.integer);
+ m = MATCH_YES;
+ }
+ }
+
+ if (m == MATCH_YES)
+ {
+ if (gfc_match_char (')') == MATCH_NO)
+ m = MATCH_ERROR;
+ }
+ }
+
+ if (expr != NULL)
+ gfc_free_expr (expr);
+ return m;
+}
/* Special subroutine for finding a symbol. Check if the name is found
in the current name space. If not, and we're compiling a function or
@@ -2443,6 +2491,35 @@ check_function_name (char *name)
}
+static match
+match_character_length_clause (gfc_charlen **cl, bool *cl_deferred, int elem)
+{
+ gfc_expr* char_len;
+ char_len = NULL;
+
+ match m = match_char_length (&char_len, cl_deferred, false);
+ if (m == MATCH_YES)
+ {
+ *cl = gfc_new_charlen (gfc_current_ns, NULL);
+ (*cl)->length = char_len;
+ }
+ else if (m == MATCH_NO)
+ {
+ if (elem > 1
+ && (current_ts.u.cl->length == NULL
+ || current_ts.u.cl->length->expr_type != EXPR_CONSTANT))
+ {
+ *cl = gfc_new_charlen (gfc_current_ns, NULL);
+ (*cl)->length = gfc_copy_expr (current_ts.u.cl->length);
+ }
+ else
+ *cl = current_ts.u.cl;
+
+ *cl_deferred = current_ts.deferred;
+ }
+ return m;
+}
+
/* Match a variable name with an optional initializer. When this
subroutine is called, a variable is expected to be parsed next.
Depending on what is happening at the moment, updates either the
@@ -2453,7 +2530,7 @@ variable_decl (int elem)
{
char name[GFC_MAX_SYMBOL_LEN + 1];
static unsigned int fill_id = 0;
- gfc_expr *initializer, *char_len;
+ gfc_expr *initializer;
gfc_array_spec *as;
gfc_array_spec *cp_as; /* Extra copy for Cray Pointees. */
gfc_charlen *cl;
@@ -2462,11 +2539,15 @@ variable_decl (int elem)
match m;
bool t;
gfc_symbol *sym;
+ match cl_match;
+ match kind_match;
+ int overridden_kind;
char c;
initializer = NULL;
as = NULL;
cp_as = NULL;
+ kind_match = MATCH_NO;
/* When we get here, we've just matched a list of attributes and
maybe a type and a double colon. The next thing we expect to see
@@ -2519,6 +2600,28 @@ variable_decl (int elem)
var_locus = gfc_current_locus;
+
+ cl = NULL;
+ cl_deferred = false;
+ cl_match = MATCH_NO;
+
+ /* Check for a character length clause before an array clause */
+ if (flag_dec_override_kind)
+ {
+ if (current_ts.type == BT_CHARACTER)
+ {
+ cl_match = match_character_length_clause (&cl, &cl_deferred, elem);
+ if (cl_match == MATCH_ERROR)
+ goto cleanup;
+ }
+ else
+ {
+ kind_match = match_per_symbol_kind (&overridden_kind);
+ if (kind_match == MATCH_ERROR)
+ goto cleanup;
+ }
+ }
+
/* Now we could see the optional array spec. or character length. */
m = gfc_match_array_spec (&as, true, true);
if (m == MATCH_ERROR)
@@ -2667,40 +2770,12 @@ variable_decl (int elem)
}
}
- char_len = NULL;
- cl = NULL;
- cl_deferred = false;
-
- if (current_ts.type == BT_CHARACTER)
+ /* Second chance for a character length clause */
+ if (cl_match == MATCH_NO && current_ts.type == BT_CHARACTER)
{
- switch (match_char_length (&char_len, &cl_deferred, false))
- {
- case MATCH_YES:
- cl = gfc_new_charlen (gfc_current_ns, NULL);
-
- cl->length = char_len;
- break;
-
- /* Non-constant lengths need to be copied after the first
- element. Also copy assumed lengths. */
- case MATCH_NO:
- if (elem > 1
- && (current_ts.u.cl->length == NULL
- || current_ts.u.cl->length->expr_type != EXPR_CONSTANT))
- {
- cl = gfc_new_charlen (gfc_current_ns, NULL);
- cl->length = gfc_copy_expr (current_ts.u.cl->length);
- }
- else
- cl = current_ts.u.cl;
-
- cl_deferred = current_ts.deferred;
-
- break;
-
- case MATCH_ERROR:
- goto cleanup;
- }
+ m = match_character_length_clause (&cl, &cl_deferred, elem);
+ if (m == MATCH_ERROR)
+ goto cleanup;
}
/* The dummy arguments and result of the abreviated form of MODULE
@@ -2802,6 +2877,19 @@ variable_decl (int elem)
goto cleanup;
}
+ if (kind_match == MATCH_YES)
+ {
+ gfc_find_symbol (name, gfc_current_ns, 1, &sym);
+ /* sym *must* be found at this point */
+ sym->ts.kind = overridden_kind;
+ if (gfc_validate_kind (sym->ts.type, sym->ts.kind, true) < 0)
+ {
+ gfc_error ("Kind %d not supported for type %s at %C",
+ sym->ts.kind, gfc_basic_typename (sym->ts.type));
+ return MATCH_ERROR;
+ }
+ }
+
if (!check_function_name (name))
{
m = MATCH_ERROR;
diff --git a/gcc/fortran/lang.opt b/gcc/fortran/lang.opt
index 25cc948699b..4a269ebb22d 100644
--- a/gcc/fortran/lang.opt
+++ b/gcc/fortran/lang.opt
@@ -502,6 +502,10 @@ fdec-math
Fortran Var(flag_dec_math)
Enable legacy math intrinsics for compatibility.
+fdec-override-kind
+Fortran Var(flag_dec_override_kind)
+Enable support for per variable kind specification.
+
fdec-structure
Fortran Var(flag_dec_structure)
Enable support for DEC STRUCTURE/RECORD.
diff --git a/gcc/fortran/options.cc b/gcc/fortran/options.cc
index d6bd36c3a8a..edbab483b36 100644
--- a/gcc/fortran/options.cc
+++ b/gcc/fortran/options.cc
@@ -78,6 +78,7 @@ set_dec_flags (int value)
SET_BITFLAG (flag_dec_blank_format_item, value, value);
SET_BITFLAG (flag_dec_char_conversions, value, value);
SET_BITFLAG (flag_dec_duplicates, value, value);
+ SET_BITFLAG (flag_dec_override_kind, value, value);
}
/* Finalize DEC flags. */
diff --git a/gcc/testsuite/gfortran.dg/dec_mixed_char_array_declaration_1.f b/gcc/testsuite/gfortran.dg/dec_mixed_char_array_declaration_1.f
new file mode 100644
index 00000000000..706ea4112a4
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/dec_mixed_char_array_declaration_1.f
@@ -0,0 +1,13 @@
+! { dg-do run }
+! { dg-options "-fdec" }
+!
+! Test character declaration with mixed string length and array specification
+!
+! Contributed by Jim MacArthur <jim.macarthur@codethink.co.uk>
+! Modified by Mark Eggleston <mark.eggleston@codethink.com>
+!
+ PROGRAM character_declaration
+ CHARACTER ASPEC_SLENGTH*2 (5) /'01','02','03','04','05'/
+ CHARACTER SLENGTH_ASPEC(5)*2 /'01','02','03','04','05'/
+ if (ASPEC_SLENGTH(3).NE.SLENGTH_ASPEC(3)) STOP 1
+ END
diff --git a/gcc/testsuite/gfortran.dg/dec_mixed_char_array_declaration_2.f b/gcc/testsuite/gfortran.dg/dec_mixed_char_array_declaration_2.f
new file mode 100644
index 00000000000..26d2acf01de
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/dec_mixed_char_array_declaration_2.f
@@ -0,0 +1,13 @@
+! { dg-do run }
+! { dg-options "-fdec-override-kind" }
+!
+! Test character declaration with mixed string length and array specification
+!
+! Contributed by Jim MacArthur <jim.macarthur@codethink.co.uk>
+! Modified by Mark Eggleston <mark.eggleston@codethink.com>
+!
+ PROGRAM character_declaration
+ CHARACTER ASPEC_SLENGTH*2 (5) /'01','02','03','04','05'/
+ CHARACTER SLENGTH_ASPEC(5)*2 /'01','02','03','04','05'/
+ if (ASPEC_SLENGTH(3).NE.SLENGTH_ASPEC(3)) STOP 1
+ END
diff --git a/gcc/testsuite/gfortran.dg/dec_mixed_char_array_declaration_3.f b/gcc/testsuite/gfortran.dg/dec_mixed_char_array_declaration_3.f
new file mode 100644
index 00000000000..76e4f0bdb93
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/dec_mixed_char_array_declaration_3.f
@@ -0,0 +1,13 @@
+! { dg-do compile }
+! { dg-options "-fdec-override-kind -fno-dec-override-kind" }
+!
+! Test character declaration with mixed string length and array specification
+!
+! Contributed by Jim MacArthur <jim.macarthur@codethink.co.uk>
+! Modified by Mark Eggleston <mark.eggleston@codethink.com>
+!
+ PROGRAM character_declaration
+ CHARACTER ASPEC_SLENGTH*2 (5) /'01','02','03','04','05'/ ! { dg-error "Syntax error" }
+ CHARACTER SLENGTH_ASPEC(5)*2 /'01','02','03','04','05'/
+ if (ASPEC_SLENGTH(3).NE.SLENGTH_ASPEC(3)) STOP 1 ! { dg-error " Operands of comparison operator" }
+ END
diff --git a/gcc/testsuite/gfortran.dg/dec_spec_in_variable_1.f b/gcc/testsuite/gfortran.dg/dec_spec_in_variable_1.f
new file mode 100644
index 00000000000..edd0f5874b7
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/dec_spec_in_variable_1.f
@@ -0,0 +1,31 @@
+! { dg-do run }
+! { dg-options "-fdec" }
+!
+! Test kind specification in variable not in type
+!
+! Contributed by Mark Eggleston <mark.eggleston@codethink.com>
+!
+ program spec_in_var
+ integer*8 ai*1, bi*4, ci
+ real*4 ar*4, br*8, cr
+
+ ai = 1
+ ar = 1.0
+ bi = 2
+ br = 2.0
+ ci = 3
+ cr = 3.0
+
+ if (ai .ne. 1) stop 1
+ if (abs(ar - 1.0) > 1.0D-6) stop 2
+ if (bi .ne. 2) stop 3
+ if (abs(br - 2.0) > 1.0D-6) stop 4
+ if (ci .ne. 3) stop 5
+ if (abs(cr - 3.0) > 1.0D-6) stop 6
+ if (kind(ai) .ne. 1) stop 7
+ if (kind(ar) .ne. 4) stop 8
+ if (kind(bi) .ne. 4) stop 9
+ if (kind(br) .ne. 8) stop 10
+ if (kind(ci) .ne. 8) stop 11
+ if (kind(cr) .ne. 4) stop 12
+ end
diff --git a/gcc/testsuite/gfortran.dg/dec_spec_in_variable_2.f b/gcc/testsuite/gfortran.dg/dec_spec_in_variable_2.f
new file mode 100644
index 00000000000..bfaba584dbb
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/dec_spec_in_variable_2.f
@@ -0,0 +1,31 @@
+! { dg-do run }
+! { dg-options "-fdec-override-kind" }
+!
+! Test kind specification in variable not in type
+!
+! Contributed by Mark Eggleston <mark.eggleston@codethink.com>
+!
+ program spec_in_var
+ integer*8 ai*1, bi*4, ci
+ real*4 ar*4, br*8, cr
+
+ ai = 1
+ ar = 1.0
+ bi = 2
+ br = 2.0
+ ci = 3
+ cr = 3.0
+
+ if (ai .ne. 1) stop 1
+ if (abs(ar - 1.0) > 1.0D-6) stop 2
+ if (bi .ne. 2) stop 3
+ if (abs(br - 2.0) > 1.0D-6) stop 4
+ if (ci .ne. 3) stop 5
+ if (abs(cr - 3.0) > 1.0D-6) stop 6
+ if (kind(ai) .ne. 1) stop 7
+ if (kind(ar) .ne. 4) stop 8
+ if (kind(bi) .ne. 4) stop 9
+ if (kind(br) .ne. 8) stop 10
+ if (kind(ci) .ne. 8) stop 11
+ if (kind(cr) .ne. 4) stop 12
+ end
diff --git a/gcc/testsuite/gfortran.dg/dec_spec_in_variable_3.f b/gcc/testsuite/gfortran.dg/dec_spec_in_variable_3.f
new file mode 100644
index 00000000000..5ff434e7466
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/dec_spec_in_variable_3.f
@@ -0,0 +1,31 @@
+! { dg-do compile }
+! { dg-options "-fdec -fno-dec-override-kind" }
+!
+! Test kind specification in variable not in type
+!
+! Contributed by Mark Eggleston <mark.eggleston@codethink.com>
+!
+ program spec_in_var
+ integer*8 ai*1, bi*4, ci ! { dg-error "Syntax error" }
+ real*4 ar*4, br*8, cr ! { dg-error "Syntax error" }
+
+ ai = 1
+ ar = 1.0
+ bi = 2
+ br = 2.0
+ ci = 3
+ cr = 3.0
+
+ if (ai .ne. 1) stop 1
+ if (abs(ar - 1.0) > 1.0D-6) stop 2
+ if (bi .ne. 2) stop 3
+ if (abs(br - 2.0) > 1.0D-6) stop 4
+ if (ci .ne. 3) stop 5
+ if (abs(cr - 3.0) > 1.0D-6) stop 6
+ if (kind(ai) .ne. 1) stop 7
+ if (kind(ar) .ne. 4) stop 8
+ if (kind(bi) .ne. 4) stop 9
+ if (kind(br) .ne. 8) stop 10
+ if (kind(ci) .ne. 8) stop 11
+ if (kind(cr) .ne. 4) stop 12
+ end
diff --git a/gcc/testsuite/gfortran.dg/dec_spec_in_variable_4.f b/gcc/testsuite/gfortran.dg/dec_spec_in_variable_4.f
new file mode 100644
index 00000000000..c01980e8b9d
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/dec_spec_in_variable_4.f
@@ -0,0 +1,14 @@
+! { dg-do compile }
+!
+! Test kind specification in variable not in type. The per variable
+! kind specification is not enabled so these should fail
+!
+! Contributed by Mark Eggleston <mark.eggleston@codethink.com>
+!
+ program spec_in_var
+ integer a
+ parameter(a=2)
+ integer b*(a) ! { dg-error "Syntax error" }
+ real c*(8) ! { dg-error "Syntax error" }
+ logical d*1_1 ! { dg-error "Syntax error" }
+ end
diff --git a/gcc/testsuite/gfortran.dg/dec_spec_in_variable_5.f b/gcc/testsuite/gfortran.dg/dec_spec_in_variable_5.f
new file mode 100644
index 00000000000..e2f39da3f4f
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/dec_spec_in_variable_5.f
@@ -0,0 +1,19 @@
+! { dg-do run }
+! { dg-options "-fdec-override-kind" }
+!
+! Test kind specification in variable not in type
+!
+! Contributed by Mark Eggleston <mark.eggleston@codethink.com>
+!
+ program spec_in_var
+ integer a
+ parameter(a=2)
+ integer b*(a)
+ real c*(8)
+ logical d*(1_1)
+ character e*(a)
+ if (kind(b).ne.2) stop 1
+ if (kind(c).ne.8) stop 2
+ if (kind(d).ne.1) stop 3
+ if (len(e).ne.2) stop 4
+ end
diff --git a/gcc/testsuite/gfortran.dg/dec_spec_in_variable_6.f b/gcc/testsuite/gfortran.dg/dec_spec_in_variable_6.f
new file mode 100644
index 00000000000..569747874e3
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/dec_spec_in_variable_6.f
@@ -0,0 +1,19 @@
+! { dg-do run }
+! { dg-options "-fdec" }
+!
+! Test kind specification in variable not in type
+!
+! Contributed by Mark Eggleston <mark.eggleston@codethink.com>
+!
+ program spec_in_var
+ integer a
+ parameter(a=2)
+ integer b*(a)
+ real c*(8)
+ logical d*(1_1)
+ character e*(a)
+ if (kind(b).ne.2) stop 1
+ if (kind(c).ne.8) stop 2
+ if (kind(d).ne.1) stop 3
+ if (len(e).ne.2) stop 4
+ end
diff --git a/gcc/testsuite/gfortran.dg/dec_spec_in_variable_7.f b/gcc/testsuite/gfortran.dg/dec_spec_in_variable_7.f
new file mode 100644
index 00000000000..b975bfd15c5
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/dec_spec_in_variable_7.f
@@ -0,0 +1,15 @@
+! { dg-do compile }
+! { dg-options "-fdec -fno-dec-override-kind" }
+!
+! Test kind specification in variable not in type as the per variable
+! kind specification is not enables these should fail
+!
+! Contributed by Mark Eggleston <mark.eggleston@codethink.com>
+!
+ program spec_in_var
+ integer a
+ parameter(a=2)
+ integer b*(a) ! { dg-error "Syntax error" }
+ real c*(8) ! { dg-error "Syntax error" }
+ logical d*1_1 ! { dg-error "Syntax error" }
+ end
diff --git a/gcc/testsuite/gfortran.dg/dec_spec_in_variable_8.f b/gcc/testsuite/gfortran.dg/dec_spec_in_variable_8.f
new file mode 100644
index 00000000000..85732e0bd85
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/dec_spec_in_variable_8.f
@@ -0,0 +1,14 @@
+! { dg-do compile }
+! { dg-options "-fdec" }
+!
+! Check that invalid kind values are rejected.
+!
+! Contributed by Mark Eggleston <mark.eggleston@codethink.com>
+!
+ program spec_in_var
+ integer a
+ parameter(a=3)
+ integer b*(a) ! { dg-error "Kind 3 not supported" }
+ real c*(78) ! { dg-error "Kind 78 not supported" }
+ logical d*(*) ! { dg-error "Invalid character" }
+ end
--
2.27.0