* Makefile.in (rtl-profile.o, value-prof.o): Add GCC_H dependency.

[pf3gnuchains/gcc-fork.git] / gcc / toplev.c

diff --git a/gcc/toplev.c b/gcc/toplev.c
index 34db3bd..853f170 100644 (file)
--- a/gcc/toplev.c
+++ b/gcc/toplev.c
@@ -1730,6 +1730,17 @@ process_options (void)
   if (flag_value_profile_transformations)
     flag_profile_values = 1;
 
+  /* Speculative prefetching implies the value profiling.  We also switch off
+     the prefetching in the loop optimizer, so that we do not emit double
+     prefetches.  TODO -- we should teach these two to cooperate; the loop
+     based prefetching may sometimes do a better job, especially in connection
+     with reuse analysis.  */
+  if (flag_speculative_prefetching)
+    {
+      flag_profile_values = 1;
+      flag_prefetch_loop_arrays = 0;
+    }
+
   /* Warn about options that are not supported on this machine.  */
 #ifndef INSN_SCHEDULING
   if (flag_schedule_insns || flag_schedule_insns_after_reload)
@@ -1898,12 +1909,24 @@ process_options (void)
       warning ("-fprefetch-loop-arrays not supported for this target");
       flag_prefetch_loop_arrays = 0;
     }
+  if (flag_speculative_prefetching)
+    {
+      if (flag_speculative_prefetching_set)
+       WARNIng ("-fspeculative-prefetching not supported for this target");
+      flag_speculative_prefetching = 0;
+    }
 #else
   if (flag_prefetch_loop_arrays && !HAVE_prefetch)
     {
       warning ("-fprefetch-loop-arrays not supported for this target (try -march switches)");
       flag_prefetch_loop_arrays = 0;
     }
+  if (flag_speculative_prefetching && !HAVE_prefetch)
+    {
+      if (flag_speculative_prefetching_set)
+       warning ("-fspeculative-prefetching not supported for this target (try -march switches)");
+      flag_speculative_prefetching = 0;
+    }
 #endif
 
   /* This combination of options isn't handled for i386 targets and doesn't