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mn10300.c (can_use_return_insn): Add size of fixed stack space for function calls into the size of the frame. 

* mn10300.c (can_use_return_insn): Add size of fixed stack space
        for function calls into the size of the frame.  */
        (expand_prologue, expand_epilogue): Likewise.
        (initial_offset): Corresponding changes..
        * mn10300.h (OUTGOING_REG_PARM_STACK_SPACE): No longer define.
        (STACK_POINTER_OFFSET): Define.
        * mn10300.md (call, call_value expanders): Don't adjust the stack
        pointer here anymore.

        * mn10300.md (ashlsi3): Remove some alternatives which are no longer
        needed or desired.

From-SVN: r13837
This commit is contained in:
Jeff Law 1997-04-03 15:20:18 -07:00
parent 24e46fc402
commit 3dbc43d13a
3 changed files with 42 additions and 17 deletions
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41
gcc/config/mn10300/mn10300.c
View File

@ -327,7 +327,8 @@ print_operand_address (file, addr)
int
can_use_return_insn ()
{
int size = get_frame_size ();
/* SIZE includes the fixed stack space needed for function calls. */
int size = get_frame_size () + (!leaf_function_p () ? 12 : 0);
return (reload_completed
&& size == 0
@ -341,7 +342,17 @@ can_use_return_insn ()
void
expand_prologue ()
{
unsigned int size = get_frame_size ();
unsigned int size;
/* We have to end the current sequence so leaf_function_p will
work. We then start a new sequence to hold the prologue/epilogue. */
end_sequence ();
/* SIZE includes the fixed stack space needed for function calls. */
size = get_frame_size () + (!leaf_function_p () ? 12 : 0);
/* Start a new sequence for the prologue/epilogue. */
start_sequence ();
/* If this is an old-style varargs function, then its arguments
need to be flushed back to the stack. */
@ -378,7 +389,17 @@ expand_prologue ()
void
expand_epilogue ()
{
unsigned int size = get_frame_size ();
unsigned int size;
/* We have to end the current sequence so leaf_function_p will
work. We then start a new sequence to hold the prologue/epilogue. */
end_sequence ();
/* SIZE includes the fixed stack space needed for function calls. */
size = get_frame_size () + (!leaf_function_p () ? 12 : 0);
/* Start a new sequence for the prologue/epilogue. */
start_sequence ();
/* Cut back the stack. */
if (frame_pointer_needed)
@ -528,6 +549,8 @@ int
initial_offset (from, to)
int from, to;
{
/* The difference between the argument pointer and the frame pointer
is the size of the callee register save area. */
if (from == ARG_POINTER_REGNUM && to == FRAME_POINTER_REGNUM)
{
if (regs_ever_live[2] || regs_ever_live[3]
@ -538,18 +561,24 @@ initial_offset (from, to)
return 0;
}
/* The difference between the argument pointer and the stack pointer is
the sum of the size of this function's frame, the callee register save
area, and the fixed stack space needed for function calls (if any). */
if (from == ARG_POINTER_REGNUM && to == STACK_POINTER_REGNUM)
{
if (regs_ever_live[2] || regs_ever_live[3]
|| regs_ever_live[6] || regs_ever_live[7]
|| frame_pointer_needed)
return get_frame_size () + 16;
return (get_frame_size () + 16 + (!leaf_function_p () ? 12 : 0));
else
return get_frame_size ();
return (get_frame_size () + (!leaf_function_p () ? 12 : 0));
}
/* The difference between the frame pointer and stack pointer is the sum
of the size of this function's frame and the fixed stack space needed
for function calls (if any). */
if (from == FRAME_POINTER_REGNUM && to == STACK_POINTER_REGNUM)
return get_frame_size ();
return get_frame_size () + (!leaf_function_p () ? 12 : 0);
abort ();
}

5
gcc/config/mn10300/mn10300.h
View File

@ -423,7 +423,10 @@ enum reg_class {
/* We use d0/d1 for passing parameters, so allocate 8 bytes of space
for a register flushback area. */
#define REG_PARM_STACK_SPACE(DECL) 8
#define OUTGOING_REG_PARM_STACK_SPACE
/* So we can allocate space for return pointers once for the function
instead of around every call. */
#define STACK_POINTER_OFFSET 4
/* 1 if N is a possible register number for function argument passing.
On the MN10300, no registers are used in this way. */

13
gcc/config/mn10300/mn10300.md
View File

@ -962,9 +962,7 @@
{
if (! call_address_operand (XEXP (operands[0], 0)))
XEXP (operands[0], 0) = force_reg (SImode, XEXP (operands[0], 0));
emit_insn (gen_addsi3 (stack_pointer_rtx, stack_pointer_rtx, GEN_INT (-4)));
emit_call_insn (gen_call_internal (XEXP (operands[0], 0), operands[1]));
emit_insn (gen_addsi3 (stack_pointer_rtx, stack_pointer_rtx, GEN_INT (4)));
DONE;
}")
@ -987,11 +985,9 @@
{
if (! call_address_operand (XEXP (operands[1], 0)))
XEXP (operands[1], 0) = force_reg (SImode, XEXP (operands[1], 0));
emit_insn (gen_addsi3 (stack_pointer_rtx, stack_pointer_rtx, GEN_INT (-4)));
emit_call_insn (gen_call_value_internal (operands[0],
XEXP (operands[1], 0),
operands[2]));
emit_insn (gen_addsi3 (stack_pointer_rtx, stack_pointer_rtx, GEN_INT (4)));
DONE;
}")
@ -1062,19 +1058,16 @@
;; ----------------------------------------------------------------------
(define_insn "ashlsi3"
[(set (match_operand:SI 0 "register_operand" "=da,d,a,d,a,d,a,d")
[(set (match_operand:SI 0 "register_operand" "=da,d,d,d,d")
(ashift:SI
(match_operand:SI 1 "register_operand" "0,0,0,0,0,0,0,0")
(match_operand:QI 2 "nonmemory_operand" "J,K,K,M,M,L,L,di")))]
(match_operand:SI 1 "register_operand" "0,0,0,0,0")
(match_operand:QI 2 "nonmemory_operand" "J,K,M,L,di")))]
""
"@
add %0,%0
asl2 %0
add %0,%0\;add %0,%0
asl2 %0\;add %0,%0
add %0,%0\;add %0,%0\;add %0,%0
asl2 %0\;asl2 %0
add %0,%0\;add %0,%0\;add %0,%0\;add %0,%0
asl %2,%0"
[(set_attr "cc" "set_zn_c0")])