[(UNSPEC_MOVE_PIC 0)
(UNSPEC_UPDATE_RETURN 1)
(UNSPEC_LOAD_PCREL_SYM 2)
+ (UNSPEC_FRAME_BLOCKAGE 3)
(UNSPEC_MOVE_PIC_LABEL 5)
(UNSPEC_SETH44 6)
(UNSPEC_SETM44 7)
(UNSPEC_MOVE_GOTDATA 19)
(UNSPEC_MEMBAR 20)
+ (UNSPEC_ATOMIC 21)
(UNSPEC_TLSGD 30)
(UNSPEC_TLSLDM 31)
""
[(set_attr "length" "0")])
+;; Do not schedule instructions accessing memory before this point.
+
+(define_expand "frame_blockage"
+ [(set (match_dup 0)
+ (unspec:BLK [(match_dup 1)] UNSPEC_FRAME_BLOCKAGE))]
+ ""
+{
+ operands[0] = gen_rtx_MEM (BLKmode, gen_rtx_SCRATCH (Pmode));
+ MEM_VOLATILE_P (operands[0]) = 1;
+ operands[1] = stack_pointer_rtx;
+})
+
+(define_insn "*frame_blockage<P:mode>"
+ [(set (match_operand:BLK 0 "" "")
+ (unspec:BLK [(match_operand:P 1 "" "")] UNSPEC_FRAME_BLOCKAGE))]
+ ""
+ ""
+ [(set_attr "length" "0")])
+
(define_expand "probe_stack"
[(set (match_operand 0 "memory_operand" "") (const_int 0))]
""