i386.c (x86_schedule): New global variable.

	* i386.c (x86_schedule): New global variable.
	(override_options): Disable scheduling when not supported.
	* i386.h (x86_schedule): Declare.
	(TARGET_SCHEDULE): New macro.

From-SVN: r87411

gcc/ChangeLog

+2004-09-13  Jan Hubicka  <jh@suse.cz>
+
+	* i386.c (x86_schedule): New global variable.
+	(override_options): Disable scheduling when not supported.
+	* i386.h (x86_schedule): Declare.
+	(TARGET_SCHEDULE): New macro.
+
 2004-09-12  Richard Henderson  <rth@redhat.com>
 
 	PR c++/16254

gcc/config/i386/i386.c

@@ -578,6 +578,7 @@ const int x86_ext_80387_constants = m_K6 | m_ATHLON | m_PENT4 | m_NOCONA | m_PPR
 /* Some CPU cores are not able to predict more than 4 branch instructions in
    the 16 byte window.  */
 const int x86_four_jump_limit = m_PPRO | m_ATHLON_K8 | m_PENT4 | m_NOCONA;
+const int x86_schedule = m_PPRO | m_ATHLON_K8 | m_K8 | m_PENT;
 
 /* In case the average insn count for single function invocation is
    lower than this constant, emit fast (but longer) prologue and
@@ -1565,6 +1566,10 @@ override_options (void)
     internal_label_prefix_len = p - internal_label_prefix;
     *p = '\0';
   }
+  /* When scheduling description is not available, disable scheduler pass so it
+     won't slow down the compilation and make x87 code slower.  */
+  if (!TARGET_SCHEDULE)
+    flag_schedule_insns_after_reload = flag_schedule_insns = 0;
 }
 
 void

gcc/config/i386/i386.h

@@ -243,7 +243,7 @@ extern const int x86_arch_always_fancy_math_387, x86_shift1;
 extern const int x86_sse_partial_reg_dependency, x86_sse_partial_regs;
 extern const int x86_sse_typeless_stores, x86_sse_load0_by_pxor;
 extern const int x86_use_ffreep, x86_sse_partial_regs_for_cvtsd2ss;
-extern const int x86_inter_unit_moves;
+extern const int x86_inter_unit_moves, x86_schedule;
 extern int x86_prefetch_sse;
 
 #define TARGET_USE_LEAVE (x86_use_leave & TUNEMASK)
@@ -298,6 +298,7 @@ extern int x86_prefetch_sse;
 #define TARGET_REP_MOVL_OPTIMAL (x86_rep_movl_optimal & TUNEMASK)
 #define TARGET_INTER_UNIT_MOVES (x86_inter_unit_moves & TUNEMASK)
 #define TARGET_FOUR_JUMP_LIMIT (x86_four_jump_limit & TUNEMASK)
+#define TARGET_SCHEDULE (x86_schedule & TUNEMASK)
 
 #define TARGET_STACK_PROBE (target_flags & MASK_STACK_PROBE)