https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107734
--- Comment #3 from David Binderman <dcb314 at hotmail dot com> --- Another test case: ./gcc.target/i386/pr53366-2.c ==666641== Conditional jump or move depends on uninitialised value(s) ==666641== at 0x11DFAE7: bitmap_set_bit (sbitmap.h:137) ==666641== by 0x11DFAE7: gimple_simplify_122(gimple_match_op*, gimple**, tree_node* (*)(tree_node*), tree_node*, tree_node**, tree_code) (gimple-match.cc:48933)