[trunk][patch] fix invalid sharing in see

["Rafael Espindola" <espindola at google dot com>]

The attached patch fixes an invalid rtl sharing in see. A test is
attached, to reproduce run on a x86_64

./cc1plus -fsee -O2 test.ii

I would like to add test.ii to the testsuite. Where should it go?

OK if bootstraps and regression tests are OK?

* see.c (see_pre_insert_extensions): Use copy_rtx to avoid invalid rtx sharing.

Cheers,
-- 
Rafael Avila de Espindola

Google Ireland Ltd.
Gordon House
Barrow Street
Dublin 4
Ireland

Registered in Dublin, Ireland
Registration Number: 368047

diff --git a/gcc/see.c b/gcc/see.c
index 6e5260b..8002cde 100644
--- a/gcc/see.c
+++ b/gcc/see.c
@@ -1687,7 +1687,7 @@ see_pre_insert_extensions (struct see_pre_extension_expr **index_map)
 
 		start_sequence ();
 		emit_insn (PATTERN (expr->se_insn));
-		se_insn = get_insns ();
+		se_insn = copy_rtx (get_insns ());
 		end_sequence ();
 
 		if (eg->flags & EDGE_ABNORMAL)

Attachment: test.ii
Description: Binary data