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Forbid __builtin_return_address when inlining
- From: Andrew Haley <aph at redhat dot com>
- To: gcc-patches at gcc dot gnu dot org
- Date: Wed, 22 Nov 2006 19:09:58 +0000
- Subject: Forbid __builtin_return_address when inlining
__builtin_return_address(0) returns the wrong address if its caller
has been inlined. Weirdly, we never seem to have detected this
before, but it surely must be wrong.
OK for trunk?
2006-11-22 Andrew Haley <email@example.com>
* tree-inline.c (inline_forbidden_p_1): Forbid
--- tree-inline.c (revision 118936)
+++ tree-inline.c (working copy)
@@ -1388,6 +1388,16 @@ inline_forbidden_p_1 (tree *nodep, int *
"it uses __builtin_return or __builtin_apply_args");
+ /* We can't inline functions that call
+ __builtin_return_address because it would return the
+ address of the caller of the function the inline has
+ been inlined into. */
+ case BUILT_IN_RETURN_ADDRESS:
+ = G_("function %q+F can never be inlined because "
+ "it uses __builtin_return_address");
+ return node;