rtl.def: Add unordered fp comparisions.

        * rtl.def: Add unordered fp comparisions.
        * tree.def: Likewise.
	* tree.h: Add ISO C 9x unordered fp comparision builtins.

	* builtins.c (expand_tree_builtin): New function.
	* c-typeck.c (build_function_call): Use it.
	(build_binary_op): Support unordered compares.
	* c-common.c (c_common_nodes_and_builtins): Add unordered compares.

	* combine.c (known_cond): Handle reverse_condition returning UNKNOWN.
	(reversible_comparison_p): Allow UNORDERED/ORDERED to be reversed.
	* cse.c (fold_rtx): Check FLOAT_MODE_P before reversing.
	(record_jump_equiv): Handle reverse_condition returning UNKNOWN.
	* jump.c (reverse_condition): Don't abort for UNLE etc, but
	return UNKNOWN.
	(swap_condition): Handle unordered compares.
	(thread_jumps): Check can_reverse before reversing.
	* loop.c (get_condition): Likewise.  Allow UNORERED/ORDERED to be
	reversed for FP.

	* optabs.c (can_compare_p): New argument CODE.  Verify branch or
	setcc is present before acking for cmp_optab.  Update all callers.
	(prepare_float_lib_cmp, init_optabs): Handle UNORDERED.
	* expmed.c (do_cmp_and_jump): Update for can_compare_p.
	* expr.c (expand_expr): Likewise.  Support unordered compares.
	(do_jump, do_store_flag): Likewise.
	* expr.h (enum libfunc_index): Add unordered compares.

	* Makefile.in (FPBIT_FUNCS): Add _unord_sf.
	(DPBIT_FUNCS): Add _unord_df.
	* config/fp-bit.c (_unord_f2): New.
	* fp-test.c (main): Try unordered compare builtins.

	* alpha-protos.h (alpha_fp_comparison_operator): Declare.
	* alpha.c (alpha_comparison_operator): Check mode properly.
	(alpha_swapped_comparison_operator): Likewise.
	(signed_comparison_operator): Likewise.
	(alpha_fp_comparison_operator): New.
	(alpha_emit_conditional_branch): Handle unordered compares.
	* alpha.h (PREDICATE_CODES): Update.
	* alpha.md (fp compares): Use alpha_fp_comparison_operator.
	(bunordered, bordered): New.

	* cp/call.c (build_over_call): Use expand_tree_builtin.
	* cp/typeck.c (build_function_call_real): Likewise.
	(build_binary_op_nodefault): Handle unordered compares.

	* gcc.c-torture/execute/ieee/fp-cmp-4.c: New.

From-SVN: r31591

1 files changed, 7 insertions, 3 deletions

diff --git a/gcc/cse.c b/gcc/cse.c
index b346199..9aced05 100644
--- a/gcc/cse.c
+++ b/gcc/cse.c
@@ -3718,9 +3718,9 @@ fold_rtx (x, insn)
 		      struct qty_table_elem *ent = &qty_table[qty];
 
 		      if ((comparison_dominates_p (ent->comparison_code, code)
-			   || (comparison_dominates_p (ent->comparison_code,
-						       reverse_condition (code))
-			       && ! FLOAT_MODE_P (mode_arg0)))
+			   || (! FLOAT_MODE_P (mode_arg0)
+			       && comparison_dominates_p (ent->comparison_code,
+						          reverse_condition (code))))
 			  && (rtx_equal_p (ent->comparison_const, folded_arg1)
 			      || (const_arg1
 				  && rtx_equal_p (ent->comparison_const,
@@ -4156,6 +4156,10 @@ record_jump_equiv (insn, taken)
     {
       reversed_nonequality = (code != EQ && code != NE);
       code = reverse_condition (code);
+
+      /* Don't remember if we can't find the inverse.  */
+      if (code == UNKNOWN)
+	return;
     }
 
   /* The mode is the mode of the non-constant.  */