90 lines
2.8 KiB
Diff
90 lines
2.8 KiB
Diff
2007-08-17 Jakub Jelinek <jakub@redhat.com>
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* decl.c (variable_decl): Don't share charlen structs if
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length == NULL.
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* trans-decl.c (create_function_arglist): Assert
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f->sym->ts.cl->backend_decl is NULL instead of unsharing
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charlen struct here.
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* gfortran.dg/assumed_charlen_sharing.f90: New test.
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--- gcc/fortran/decl.c.jj 2007-02-20 22:38:20.000000000 +0100
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+++ gcc/fortran/decl.c 2007-08-21 20:50:33.000000000 +0200
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@@ -1086,10 +1086,11 @@ variable_decl (int elem)
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break;
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/* Non-constant lengths need to be copied after the first
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- element. */
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+ element. Also copy assumed lengths. */
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case MATCH_NO:
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- if (elem > 1 && current_ts.cl->length
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- && current_ts.cl->length->expr_type != EXPR_CONSTANT)
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+ if (elem > 1
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+ && (current_ts.cl->length == NULL
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+ || current_ts.cl->length->expr_type != EXPR_CONSTANT))
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{
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cl = gfc_get_charlen ();
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cl->next = gfc_current_ns->cl_list;
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--- gcc/fortran/trans-decl.c.jj 2007-03-12 08:28:13.000000000 +0100
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+++ gcc/fortran/trans-decl.c 2007-08-21 20:50:33.000000000 +0200
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@@ -1417,25 +1417,8 @@ create_function_arglist (gfc_symbol * sy
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if (!f->sym->ts.cl->length)
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{
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TREE_USED (length) = 1;
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- if (!f->sym->ts.cl->backend_decl)
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- f->sym->ts.cl->backend_decl = length;
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- else
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- {
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- /* there is already another variable using this
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- gfc_charlen node, build a new one for this variable
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- and chain it into the list of gfc_charlens.
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- This happens for e.g. in the case
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- CHARACTER(*)::c1,c2
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- since CHARACTER declarations on the same line share
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- the same gfc_charlen node. */
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- gfc_charlen *cl;
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-
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- cl = gfc_get_charlen ();
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- cl->backend_decl = length;
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- cl->next = f->sym->ts.cl->next;
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- f->sym->ts.cl->next = cl;
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- f->sym->ts.cl = cl;
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- }
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+ gcc_assert (!f->sym->ts.cl->backend_decl);
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+ f->sym->ts.cl->backend_decl = length;
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}
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hidden_typelist = TREE_CHAIN (hidden_typelist);
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--- gcc/testsuite/gfortran.dg/assumed_charlen_sharing.f90.jj 2007-08-21 08:29:57.000000000 +0200
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+++ gcc/testsuite/gfortran.dg/assumed_charlen_sharing.f90 2007-08-21 08:29:57.000000000 +0200
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@@ -0,0 +1,29 @@
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+! This testcase was miscompiled, because ts.cl
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+! in function bar was initially shared between both
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+! dummy arguments. Although it was later unshared,
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+! all expressions which copied ts.cl from bar2
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+! before that used incorrectly bar1's length
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+! instead of bar2.
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+! { dg-do run }
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+
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+subroutine foo (foo1, foo2)
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+ implicit none
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+ integer, intent(in) :: foo2
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+ character(*), intent(in) :: foo1(foo2)
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+end subroutine foo
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+
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+subroutine bar (bar1, bar2)
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+ implicit none
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+ character(*), intent(in) :: bar1, bar2
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+
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+ call foo ((/ bar2 /), 1)
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+end subroutine bar
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+
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+program test
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+ character(80) :: str1
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+ character(5) :: str2
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+
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+ str1 = 'String'
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+ str2 = 'Strng'
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+ call bar (str2, str1)
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+end program test
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