* rs6000/predicates.md (fix_trunc_dest_operand): New.
* rs6000/rs6000.md (fix_truncdfsi2): Use fix_trunc_dest_operand.
Check that a memory operand is valid before trying to use it.
From-SVN: r99927
2005-05-18 Geoffrey Keating <geoffk@apple.com>
+ * rs6000/predicates.md (fix_trunc_dest_operand): New.
+ * rs6000/rs6000.md (fix_truncdfsi2): Use fix_trunc_dest_operand.
+ Check that a memory operand is valid before trying to use it.
+
* tree-cfg.c (pass_remove_useless): This pass works on trees.
2005-05-18 Richard Guenther <rguenth@gcc.gnu.org>
|| GET_CODE (XEXP (XEXP (op, 0), 1)) != CONST_INT
|| INTVAL (XEXP (XEXP (op, 0), 1)) % 4 == 0")))
+;; Used for the destination of the fix_truncdfsi2 expander.
+;; If stfiwx will be used, the result goes to memory; otherwise,
+;; we're going to emit a store and a load of a subreg, so the dest is a
+;; register.
+(define_predicate "fix_trunc_dest_operand"
+ (if_then_else (match_test "! TARGET_E500_DOUBLE && TARGET_PPC_GFXOPT")
+ (match_operand 0 "memory_operand")
+ (match_operand 0 "gpc_reg_operand")))
+
;; Return 1 if the operand is either a non-special register or can be used
;; as the operand of a `mode' add insn.
(define_predicate "add_operand"
}"
[(set_attr "length" "20")])
-; In the TARGET_PPC_GFXOPT case, this could and probably should
-; take a memory destination; but actually making this work is hard.
(define_expand "fix_truncdfsi2"
- [(parallel [(set (match_operand:SI 0 "gpc_reg_operand" "")
+ [(parallel [(set (match_operand:SI 0 "fix_trunc_dest_operand" "")
(fix:SI (match_operand:DF 1 "gpc_reg_operand" "")))
(clobber (match_dup 2))
(clobber (match_dup 3))])]
if (TARGET_PPC_GFXOPT)
{
rtx orig_dest = operands[0];
- if (GET_CODE (orig_dest) != MEM)
+ if (! memory_operand (orig_dest, GET_MODE (orig_dest)))
operands[0] = assign_stack_temp (SImode, GET_MODE_SIZE (SImode), 0);
emit_insn (gen_fix_truncdfsi2_internal_gfxopt (operands[0], operands[1],
operands[2]));