opts.c (decode_options): Don't enable flag_schedule_insns when optimizing for size.

	* opts.c (decode_options): Don't enable flag_schedule_insns 
	when optimizing for size.
	* doc/invoke.texi: Document change.

From-SVN: r154424

gcc/ChangeLog

+2009-11-22  Richard Earnshaw  <rearnsha@arm.com>
+
+	* opts.c (decode_options): Don't enable flag_schedule_insns 
+	when optimizing for size.
+	* doc/invoke.texi: Document change.
+
 2009-11-22  Uros Bizjak  <ubizjak@gmail.com>
 
 	PR target/42113

gcc/doc/invoke.texi

@@ -6295,7 +6295,7 @@ helps machines that have slow floating point or memory load instructions
 by allowing other instructions to be issued until the result of the load
 or floating point instruction is required.
 
-Enabled at levels @option{-O2}, @option{-O3}, @option{-Os}.
+Enabled at levels @option{-O2}, @option{-O3}.
 
 @item -fschedule-insns2
 @opindex fschedule-insns2

gcc/opts.c

@@ -884,7 +884,8 @@ decode_options (unsigned int argc, const char **argv)
   flag_caller_saves = opt2;
   flag_peephole2 = opt2;
 #ifdef INSN_SCHEDULING
-  flag_schedule_insns = opt2;
+  /* Only run the pre-regalloc scheduling pass if optimizing for speed.  */
+  flag_schedule_insns = opt2 && ! optimize_size;
   flag_schedule_insns_after_reload = opt2;
 #endif
   flag_regmove = opt2;