PR middle-end/20297

        * expr.c (init_block_move_fn): Force default visibility.
        (init_block_clear_fn): Likewise.
        * builtins.c (expand_builtin_fork_or_exec): Likewise.
        * targhooks.c (default_external_stack_protect_fail): Likewise.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@112270 138bc75d-0d04-0410-961f-82ee72b054a4

5 files changed, 40 insertions, 0 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 6b1c06eccd5..b9b9eae926a 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,11 @@
+2006-03-21  Jason Merrill  <jason@redhat.com>
+
+	PR middle-end/20297
+	* expr.c (init_block_move_fn): Force default visibility.
+	(init_block_clear_fn): Likewise.
+	* builtins.c (expand_builtin_fork_or_exec): Likewise.
+	* targhooks.c (default_external_stack_protect_fail): Likewise.
+
 2006-03-21  Richard Sandiford  <richard@codesourcery.com>
 
 	* config/mips/predicates.md (const_call_insn_operand): Allow direct
diff --git a/gcc/builtins.c b/gcc/builtins.c
index 999d777ecc4..ebdbb695296 100644
--- a/gcc/builtins.c
+++ b/gcc/builtins.c
@@ -5381,6 +5381,8 @@ expand_builtin_fork_or_exec (tree fn, tree arglist, rtx target, int ignore)
   TREE_PUBLIC (decl) = 1;
   DECL_ARTIFICIAL (decl) = 1;
   TREE_NOTHROW (decl) = 1;
+  DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
+  DECL_VISIBILITY_SPECIFIED (fn) = 1;
   call = build_function_call_expr (decl, arglist);
 
   return expand_call (call, target, ignore);
diff --git a/gcc/expr.c b/gcc/expr.c
index e3cb784f187..2d5c359e139 100644
--- a/gcc/expr.c
+++ b/gcc/expr.c
@@ -1409,6 +1409,8 @@ init_block_move_fn (const char *asmspec)
       TREE_PUBLIC (fn) = 1;
       DECL_ARTIFICIAL (fn) = 1;
       TREE_NOTHROW (fn) = 1;
+      DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
+      DECL_VISIBILITY_SPECIFIED (fn) = 1;
 
       block_move_fn = fn;
     }
@@ -2556,6 +2558,8 @@ init_block_clear_fn (const char *asmspec)
       TREE_PUBLIC (fn) = 1;
       DECL_ARTIFICIAL (fn) = 1;
       TREE_NOTHROW (fn) = 1;
+      DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
+      DECL_VISIBILITY_SPECIFIED (fn) = 1;
 
       block_clear_fn = fn;
     }
diff --git a/gcc/targhooks.c b/gcc/targhooks.c
index f6289c8977e..45942a27a22 100644
--- a/gcc/targhooks.c
+++ b/gcc/targhooks.c
@@ -398,6 +398,8 @@ default_external_stack_protect_fail (void)
       TREE_NOTHROW (t) = 1;
       DECL_ARTIFICIAL (t) = 1;
       DECL_IGNORED_P (t) = 1;
+      DECL_VISIBILITY (t) = VISIBILITY_DEFAULT;
+      DECL_VISIBILITY_SPECIFIED (t) = 1;
 
       stack_chk_fail_decl = t;
     }
diff --git a/gcc/testsuite/gcc.dg/visibility-11.c b/gcc/testsuite/gcc.dg/visibility-11.c
new file mode 100644
index 00000000000..e5995827b79
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/visibility-11.c
@@ -0,0 +1,24 @@
+/* PR middle-end/20297 */
+/* The memcpy FUNCTION_DECL built in the middle-end for block moves got
+   hidden visibility from the first push, so the call didn't use the PLT.  */
+
+/* { dg-do compile { target i?86-*-* x86_64-*-* } } */
+/* { dg-require-visibility "" } */
+/* { dg-options "-Os -fpic" } */
+/* { dg-final { scan-assembler "memcpy@PLT" } } */
+
+#pragma GCC visibility push(hidden)
+#pragma GCC visibility push(default)
+extern void* memcpy (void *, const void *, __SIZE_TYPE__);
+#pragma GCC visibility pop
+
+struct a { int a[10]; };
+
+extern void *bar (struct a *, struct a *, int);
+
+void *
+foo (struct a *a, struct a *b, int c)
+{
+  struct a cc = *b;
+  return bar (a, &cc, 4 * c);
+}