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[Bug middle-end/42509] [4.5 Regression] bootstrap failure in stage3 (integer overflow in preprocessor expression)
- From: "rguenth at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 2 Apr 2010 15:20:23 -0000
- Subject: [Bug middle-end/42509] [4.5 Regression] bootstrap failure in stage3 (integer overflow in preprocessor expression)
- References: <bug-42509-11764@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #24 from rguenth at gcc dot gnu dot org 2010-04-02 15:20 -------
Alternative patch as suggested by Richard on IRC - it doesn't make sense to
retain MEM_EXPR w/o MEM_OFFSET.
Index: gcc/cfgcleanup.c
===================================================================
--- gcc/cfgcleanup.c (revision 157942)
+++ gcc/cfgcleanup.c (working copy)
@@ -891,18 +891,14 @@ merge_memattrs (rtx x, rtx y)
set_mem_alias_set (y, 0);
}
- if (! mem_expr_equal_p (MEM_EXPR (x), MEM_EXPR (y)))
+ if (! mem_expr_equal_p (MEM_EXPR (x), MEM_EXPR (y))
+ || MEM_OFFSET (x) != MEM_OFFSET (y))
{
set_mem_expr (x, 0);
set_mem_expr (y, 0);
set_mem_offset (x, 0);
set_mem_offset (y, 0);
}
- else if (MEM_OFFSET (x) != MEM_OFFSET (y))
- {
- set_mem_offset (x, 0);
- set_mem_offset (y, 0);
- }
if (!MEM_SIZE (x))
mem_size = NULL_RTX;
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC|rguenther at suse dot de |jakub at gcc dot gnu dot
| |org, rguenth at gcc dot gnu
| |dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42509