understands to be a memory clobber.
* arm.c (arm_expand_prologue): Use it.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@55486
138bc75d-0d04-0410-961f-
82ee72b054a4
+2002-07-16 Richard Earnshaw <rearnsha@arm.com>
+
+ * arm.md (stack_tie): New insn. Use an idiom that the alias code
+ understands to be a memory clobber.
+ * arm.c (arm_expand_prologue): Use it.
+
2002-07-16 Daniel Berlin <dberlin@dberlin.org>
* ra-rewrite.c: #include reload.h, insn-config.h
will prevent the scheduler from moving stores to the frame
before the stack adjustment. */
if (frame_pointer_needed)
- {
- rtx unspec = gen_rtx_UNSPEC (SImode,
- gen_rtvec (2, stack_pointer_rtx,
- hard_frame_pointer_rtx),
- UNSPEC_PRLG_STK);
-
- insn = emit_insn (gen_rtx_CLOBBER (VOIDmode,
- gen_rtx_MEM (BLKmode, unspec)));
- }
+ insn = emit_insn (gen_stack_tie (stack_pointer_rtx,
+ hard_frame_pointer_rtx));
}
/* If we are profiling, make sure no instructions are scheduled before
[(set_attr "type" "store4")]
)
+(define_insn "stack_tie"
+ [(set (mem:BLK (scratch))
+ (unspec:BLK [(match_operand:SI 0 "s_register_operand" "r")
+ (match_operand:SI 1 "s_register_operand" "r")]
+ UNSPEC_PRLG_STK))]
+ ""
+ ""
+ [(set_attr "length" "0")]
+)
+
;; Similarly for the floating point registers
(define_insn "*push_fp_multi"
[(match_parallel 2 "multi_register_push"