8
* combine.c (combine_instructions): When finished, call init_recog.
* regmove.c (optimize_reg_copy_3): Reject volatile MEMs.
From-SVN: r23094
total_successes += combine_successes;
nonzero_sign_valid = 0;
+
+ /* Make recognizer allow volatile MEMs again. */
+ init_recog ();
}
/* Wipe the reg_last_xxx arrays in preparation for another pass. */
|| SET_DEST (set) != src_reg)
return;
+ /* Be conserative: although this optimization is also valid for
+ volatile memory references, that could cause trouble in later passes. */
+ if (MEM_VOLATILE_P (SET_SRC (set)))
+ return;
+
/* Do not use a SUBREG to truncate from one mode to another if truncation
is not a nop. */
if (GET_MODE_BITSIZE (GET_MODE (src_reg)) <= GET_MODE_BITSIZE (GET_MODE (src))