2012-08-20 Tobias Burnus <burnus@net-b.de>

        PR fortran/54301
        * expr.c (gfc_check_pointer_assign): Warn when a pointer,
        which is a function result, might outlive its target.

2012-08-20  Tobias Burnus  <burnus@net-b.de>

        PR fortran/54301
        * gfortran.dg/warn_target_lifetime_2.f90: New.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@190542 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/fortran/ChangeLog b/gcc/fortran/ChangeLog
index de255ea..4992ecf 100644 (file)
--- a/gcc/fortran/ChangeLog
+++ b/gcc/fortran/ChangeLog
@@ -1,6 +1,12 @@
 2012-08-20  Tobias Burnus  <burnus@net-b.de>
 
        PR fortran/54301
+       * expr.c (gfc_check_pointer_assign): Warn when a pointer,
+       which is a function result, might outlive its target.
+
+2012-08-20  Tobias Burnus  <burnus@net-b.de>
+
+       PR fortran/54301
        * expr.c (gfc_check_pointer_assign): Warn when the pointer
        might outlive its target.
        * gfortran.h (struct gfc_option_t): Add warn_target_lifetime.

diff --git a/gcc/fortran/expr.c b/gcc/fortran/expr.c
index 6f1283d..bc1f5e3 100644 (file)
--- a/gcc/fortran/expr.c
+++ b/gcc/fortran/expr.c
@@ -3673,6 +3673,7 @@ gfc_check_pointer_assign (gfc_expr *lvalue, gfc_expr *rvalue)
 
       warn = lvalue->symtree->n.sym->attr.dummy
             || lvalue->symtree->n.sym->attr.result
+            || lvalue->symtree->n.sym->attr.function
             || lvalue->symtree->n.sym->attr.host_assoc
             || lvalue->symtree->n.sym->attr.use_assoc
             || lvalue->symtree->n.sym->attr.in_common;

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 686e041..0b1bf5a 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2012-08-20  Tobias Burnus  <burnus@net-b.de>
+
+       PR fortran/54301
+       * gfortran.dg/warn_target_lifetime_2.f90: New.
+
 2012-08-20  Paolo Carlini  <paolo.carlini@oracle.com>
 
        PR c++/10416

diff --git a/gcc/testsuite/gfortran.dg/warn_target_lifetime_2.f90 b/gcc/testsuite/gfortran.dg/warn_target_lifetime_2.f90
new file mode 100644 (file)
index 0000000..bfcb7ac
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/warn_target_lifetime_2.f90
@@ -0,0 +1,10 @@
+! { dg-do compile }
+! { dg-options "-Wtarget-lifetime" }
+!
+! PR fortran/54301
+!
+function f()
+  integer, pointer :: f
+  integer, target :: t
+  f => t ! { dg-warning "Pointer at .1. in pointer assignment might outlive the pointer target" }
+end