version.c: Bump for new snapshot.

        * version.c: Bump for new snapshot.

        * local-alloc.c (update_equiv_regs): All the target to reject
        promotion of some REG_EQUAL to REG_EQUIV notes.
        * pa.h (DONT_RECORD_EQUIVALENCE): Define.
Fixes some c-torture failures, also improves generated code.

        * pa.c (secondary_reload_class): (mem (mem ... )) does not need
        secondary reloads.
Fixes 094.fpppp/twldrv.f abort.

        * pa.c (hppa_builtin_saveregs): Emit a blockage insn after the
        store of the argument registers.
Fixes c-torture failure.

        * fold-const.c (multiple_of_p): New function.
        (fold): Turn some cases of *_DIV_EXPR into EXACT_DIV_EXPR.
One of the performance patches from the g77 folks.

From-SVN: r14915

1 files changed, 16 insertions, 0 deletions

diff --git a/gcc/local-alloc.c b/gcc/local-alloc.c
index 4466169..677801e 100644
--- a/gcc/local-alloc.c
+++ b/gcc/local-alloc.c
@@ -1048,6 +1048,22 @@ update_equiv_regs ()
 
       note = find_reg_note (insn, REG_EQUAL, NULL_RTX);
 
+#ifdef DONT_RECORD_EQUIVALENCE
+      /* Allow the target to reject promotions of some REG_EQUAL notes to
+	 REG_EQUIV notes.
+
+	 In some cases this can improve register allocation if the existence
+	 of the REG_EQUIV note is likely to increase the lifetime of a register
+	 that is likely to be spilled.
+
+	 It may also be necessary if the target can't handle certain constant
+	 expressions appearing randomly in insns, but for whatever reason
+	 those expressions must be considered legitimate constant expressions
+	 to prevent them from being forced into memory.  */
+      if (note && DONT_RECORD_EQUIVALENCE (note))
+        note = NULL;
+#endif
+
       /* Record this insn as initializing this register.  */
       reg_equiv_init_insn[regno] = insn;