optabs.c (emit_cmp_insn): Abort if asked to emit non-canonical RTL for a target with HAVE_cc0 defined.

        * optabs.c (emit_cmp_insn): Abort if asked to emit non-canonical RTL
        for a target with HAVE_cc0 defined.
        (emit_cmp_and_jump_insns): New function.
        * expr.h (emit_cmp_and_jump_insns): Prototype it.
        * loop.c (check_dbra_loop): Use it to replace calls
        to emit_cmp_insn and emit_jump_insn and to canonicalise
        the comparison if necessary.
        * unroll.c (unroll_loop): Likewise.

From-SVN: r24471

1 files changed, 5 insertions, 0 deletions

diff --git a/gcc/expr.h b/gcc/expr.h
index 134c095..c6740c2 100644
--- a/gcc/expr.h
+++ b/gcc/expr.h
@@ -614,6 +614,11 @@ extern void emit_0_to_1_insn PROTO((rtx));
 extern void emit_cmp_insn PROTO((rtx, rtx, enum rtx_code, rtx,
 				 enum machine_mode, int, int));
 
+/* Emit a pair of rtl insns to compare two rtx's and to jump 
+   to a label if the comparison is true.  */
+extern void emit_cmp_and_jump_insns PROTO((rtx, rtx, enum rtx_code, rtx,
+					   enum machine_mode, int, int, rtx));
+
 /* Nonzero if a compare of mode MODE can be done straightforwardly
    (without splitting it into pieces).  */
 extern int can_compare_p PROTO((enum machine_mode));