* optabs.c (emit_unop_insn): Break out to ...
(maybe_emit_unop_insn): ... this one.
(expand_sfix_optab): Use maybe variant.
* optabs.h (maybe_emit_unop_insn): Declare.
* i386.md (mov0 patterns): Enable by default.
(FP conversion expanders): Disable expansion of code expanding
sequences when instruction should be optimized for size.
(single strinop patterns): Enable when optimizing for size.
(string expanders): Disable expanding of code expanding sequences
when optimizning instruction for size.
* i386.c (ix86_expand_vector_move_misalign): Do code size optimization
per BB basis.
(ix86_fp_comparison_sahf_cost): Likewise.
(ix86_expand_branch): Likewise.
(ix86_expand_ashl_const): Likewise.
(ix86_split_ashl): Likewise.
(ix86_expand_strlen): Likewise.
(ix86_emit_fp_unordered_jump): Likewie.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@138835
138bc75d-0d04-0410-961f-
82ee72b054a4