http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53438
Richard Guenther <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |ASSIGNED AssignedTo|unassigned at gcc dot |rguenth at gcc dot gnu.org |gnu.org | --- Comment #6 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-05-22 11:07:15 UTC --- I think the following should fix it: Index: gcc/tree-sra.c =================================================================== --- gcc/tree-sra.c (revision 187767) +++ gcc/tree-sra.c (working copy) @@ -1001,9 +1001,10 @@ build_access_from_expr_1 (tree expr, gim @@ -2096,9 +2097,12 @@ analyze_access_subtree (struct access *r && (TREE_CODE (root->type) != INTEGER_TYPE || TYPE_PRECISION (root->type) != root->size) /* But leave bitfield accesses alone. */ - && (root->offset % BITS_PER_UNIT) == 0) + && (TREE_CODE (root->expr) != COMPONENT_REF + || !DECL_BIT_FIELD (TREE_OPERAND (root->expr, 1)))) { tree rt = root->type; + gcc_assert ((root->offset % BITS_PER_UNIT) == 0 + && (root->size % BITS_PER_UNIT) == 0); root->type = build_nonstandard_integer_type (root->size, TYPE_UNSIGNED (rt)); root->expr = build_ref_for_offset (UNKNOWN_LOCATION, can you verify that, thus give it a bootstrap & regtest run?