http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58619
Dehao Chen <dehao at google dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |dehao at google dot com
--- Comment #3 from Dehao Chen <dehao at google dot com> ---
This is a bug when updating block during tree-inline. Basically, it is legal
for *n to be NULL. E.g. When gimple_block(id->gimple_call) is NULL,
remap_blocks_to_null will be called to set *n to NULL.
The problem is that we should check this before calling COMBINE_LOCATION_DATA,
which assumes block is not NULL.
The following patch can fix the problem:
Index: gcc/tree-inline.c
===================================================================
--- gcc/tree-inline.c (revision 203208)
+++ gcc/tree-inline.c (working copy)
@@ -2090,7 +2090,10 @@ copy_phis_for_bb (basic_block bb, copy_body_data *
n = (tree *) pointer_map_contains (id->decl_map,
LOCATION_BLOCK (locus));
gcc_assert (n);
- locus = COMBINE_LOCATION_DATA (line_table, locus, *n);
+ if (*n)
+ locus = COMBINE_LOCATION_DATA (line_table, locus, *n);
+ else
+ locus = LOCATION_LOCUS (locus);
}
else
locus = LOCATION_LOCUS (locus);
