On 01/26/2016 09:39 AM, Jakub Jelinek wrote:
PR target/69442 * combine.c (combine_instructions): For REG_EQUAL note with SET_DEST being ZERO_EXTRACT, also temporarily set SET_DEST to the underlying register. * doc/rtl.texi (REG_EQUAL): Document the behavior of REG_EQUAL/REG_EQUIV notes if SET_DEST is ZERO_EXTRACT. * gcc.dg/pr69442.c: New test.
Ok. Bernd