Squash commit of EH in gimple

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

diff --git a/gcc/optabs.c b/gcc/optabs.c
index 35f95f2..a1adc58 100644 (file)
--- a/gcc/optabs.c
+++ b/gcc/optabs.c
@@ -3858,32 +3858,31 @@ emit_libcall_block (rtx insns, rtx target, rtx result, rtx equiv)
 
   /* If we're using non-call exceptions, a libcall corresponding to an
      operation that may trap may also trap.  */
+  /* ??? See the comment in front of make_reg_eh_region_note.  */
   if (flag_non_call_exceptions && may_trap_p (equiv))
     {
       for (insn = insns; insn; insn = NEXT_INSN (insn))
        if (CALL_P (insn))
          {
            rtx note = find_reg_note (insn, REG_EH_REGION, NULL_RTX);
-
-           if (note != 0 && INTVAL (XEXP (note, 0)) <= 0)
-             remove_note (insn, note);
+           if (note)
+             {
+               int lp_nr = INTVAL (XEXP (note, 0));
+               if (lp_nr == 0 || lp_nr == INT_MIN)
+                 remove_note (insn, note);
+             }
          }
     }
   else
-  /* look for any CALL_INSNs in this sequence, and attach a REG_EH_REGION
-     reg note to indicate that this call cannot throw or execute a nonlocal
-     goto (unless there is already a REG_EH_REGION note, in which case
-     we update it).  */
-    for (insn = insns; insn; insn = NEXT_INSN (insn))
-      if (CALL_P (insn))
-       {
-         rtx note = find_reg_note (insn, REG_EH_REGION, NULL_RTX);
-
-         if (note != 0)
-           XEXP (note, 0) = constm1_rtx;
-         else
-           add_reg_note (insn, REG_EH_REGION, constm1_rtx);
-       }
+    {
+      /* Look for any CALL_INSNs in this sequence, and attach a REG_EH_REGION
+        reg note to indicate that this call cannot throw or execute a nonlocal
+        goto (unless there is already a REG_EH_REGION note, in which case
+        we update it).  */
+      for (insn = insns; insn; insn = NEXT_INSN (insn))
+       if (CALL_P (insn))
+         make_reg_eh_region_note_nothrow_nononlocal (insn);
+    }
 
   /* First emit all insns that set pseudos.  Remove them from the list as
      we go.  Avoid insns that set pseudos which were referenced in previous