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List: gcc-bugs
Subject: [Bug bootstrap/63573] [5 Regression] libgo: ICE building libgo on powerpc-linux-gnu
From: "hubicka at gcc dot gnu.org" <gcc-bugzilla () gcc ! gnu ! org>
Date: 2014-10-31 11:34:11
Message-ID: bug-63573-4-x7TI4Uvvdg () http ! gcc ! gnu ! org/bugzilla/
[Download RAW message or body]
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63573
--- Comment #7 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
This is the alternative patch resetting DECL_RTL in calls.c
Index: calls.c
===================================================================
--- calls.c (revision 216942)
+++ calls.c (working copy)
@@ -1210,6 +1210,15 @@ initialize_argument_information (int num
&& TREE_CODE (base) != SSA_NAME
&& (!DECL_P (base) || MEM_P (DECL_RTL (base)))))
{
+ /* Argument setup code may have copied the value to register. We
+ that optimization now because the tail call code must use
+ the original location. */
+ if (TREE_CODE (args[i].tree_value) == PARM_DECL
+ && !MEM_P (DECL_RTL (args[i].tree_value))
+ && DECL_INCOMING_RTL (args[i].tree_value)
+ && MEM_P (DECL_RTL (args[i].tree_value)))
+ set_decl_rtl (args[i].tree_value, DECL_INCOMING_RTL
(args[i].tree_value));
+
mark_addressable (args[i].tree_value);
/* We can't use sibcalls if a callee-copied argument is
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