* config/i386/i386.c (override_options): Define c3-2 as a 686 with SSE.

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

diff --git a/gcc/flow.c b/gcc/flow.c
index 5e51818..24f8691 100644 (file)
--- a/gcc/flow.c
+++ b/gcc/flow.c
@@ -693,6 +693,16 @@ update_life_info (blocks, extent, prop_flags)
             partial improvement (see MAX_MEM_SET_LIST_LEN usage).
             Further improvement may be possible.  */
          cleanup_cfg (CLEANUP_EXPENSIVE);
+
+         /* Zap the life information from the last round.  If we don't 
+            do this, we can wind up with registers that no longer appear
+            in the code being marked live at entry, which twiggs bogus
+            warnings from regno_uninitialized.  */
+         FOR_EACH_BB (bb)
+           {
+             CLEAR_REG_SET (bb->global_live_at_start);
+             CLEAR_REG_SET (bb->global_live_at_end);
+           }
        }
 
       /* If asked, remove notes from the blocks we'll update.  */
@@ -2379,7 +2389,7 @@ regno_uninitialized (regno)
              || FUNCTION_ARG_REGNO_P (regno))))
     return 0;
 
-  return REGNO_REG_SET_P (ENTRY_BLOCK_PTR->next_bb->global_live_at_start, regno);
+  return REGNO_REG_SET_P (ENTRY_BLOCK_PTR->global_live_at_end, regno);
 }
 
 /* 1 if register REGNO was alive at a place where `setjmp' was called
@@ -2394,7 +2404,7 @@ regno_clobbered_at_setjmp (regno)
     return 0;
 
   return ((REG_N_SETS (regno) > 1
-          || REGNO_REG_SET_P (ENTRY_BLOCK_PTR->next_bb->global_live_at_start, regno))
+          || REGNO_REG_SET_P (ENTRY_BLOCK_PTR->global_live_at_end, regno))
          && REGNO_REG_SET_P (regs_live_at_setjmp, regno));
 }
 \f