gen_int_mode (STARTING_FRAME_OFFSET, Pmode));
}
+/* Return contents of MEM at frame pointer + stack size + 1 (+2 if 3 byte PC).
+ This is return address of function. */
+rtx
+avr_return_addr_rtx (int count, const_rtx tem)
+{
+ rtx r;
+
+ /* Can only return this functions return address. Others not supported. */
+ if (count)
+ return NULL;
+
+ if (AVR_3_BYTE_PC)
+ {
+ r = gen_rtx_SYMBOL_REF (Pmode, ".L__stack_usage+2");
+ warning (0, "'builtin_return_address' contains only 2 bytes of address");
+ }
+ else
+ r = gen_rtx_SYMBOL_REF (Pmode, ".L__stack_usage+1");
+
+ r = gen_rtx_PLUS (Pmode, tem, r);
+ r = gen_frame_mem (Pmode, memory_address (Pmode, r));
+ r = gen_rtx_ROTATE (HImode, r, GEN_INT (8));
+ return r;
+}
+
/* Return 1 if the function epilogue is just a single "ret". */
int
cfun->machine->is_signal = signal_function_p (current_function_decl);
cfun->machine->is_OS_task = avr_OS_task_function_p (current_function_decl);
cfun->machine->is_OS_main = avr_OS_main_function_p (current_function_decl);
+ cfun->machine->stack_usage = 0;
/* Prologue: naked. */
if (cfun->machine->is_naked)
/* Push zero reg. */
insn = emit_move_insn (pushbyte, zero_reg_rtx);
RTX_FRAME_RELATED_P (insn) = 1;
+ cfun->machine->stack_usage++;
/* Push tmp reg. */
insn = emit_move_insn (pushbyte, tmp_reg_rtx);
RTX_FRAME_RELATED_P (insn) = 1;
+ cfun->machine->stack_usage++;
/* Push SREG. */
insn = emit_move_insn (tmp_reg_rtx,
RTX_FRAME_RELATED_P (insn) = 1;
insn = emit_move_insn (pushbyte, tmp_reg_rtx);
RTX_FRAME_RELATED_P (insn) = 1;
+ cfun->machine->stack_usage++;
/* Push RAMPZ. */
if(AVR_HAVE_RAMPZ
RTX_FRAME_RELATED_P (insn) = 1;
insn = emit_move_insn (pushbyte, tmp_reg_rtx);
RTX_FRAME_RELATED_P (insn) = 1;
+ cfun->machine->stack_usage++;
}
/* Clear zero reg. */
emit_insn (gen_call_prologue_saves (gen_int_mode (live_seq, HImode),
gen_int_mode (size + live_seq, HImode)));
RTX_FRAME_RELATED_P (insn) = 1;
+ cfun->machine->stack_usage += size + live_seq;
}
else
{
/* Emit push of register to save. */
insn=emit_move_insn (pushbyte, gen_rtx_REG (QImode, reg));
RTX_FRAME_RELATED_P (insn) = 1;
+ cfun->machine->stack_usage++;
}
}
if (frame_pointer_needed)
/* Push frame pointer. */
insn = emit_move_insn (pushword, frame_pointer_rtx);
RTX_FRAME_RELATED_P (insn) = 1;
+ cfun->machine->stack_usage += 2;
}
if (!size)
emit_insn (sp_plus_insns);
else
emit_insn (fp_plus_insns);
+ cfun->machine->stack_usage += size;
}
}
}
}
fprintf (file, "/* frame size = " HOST_WIDE_INT_PRINT_DEC " */\n",
get_frame_size());
+ fprintf (file, "/* stack size = %d */\n",
+ cfun->machine->stack_usage);
+ /* Create symbol stack offset here so all functions have it. Add 1 to stack
+ usage for offset so that SP + .L__stack_offset = return address. */
+ fprintf (file, ".L__stack_usage = %d\n", cfun->machine->stack_usage);
}
#define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
OFFSET = avr_initial_elimination_offset (FROM, TO)
-#define RETURN_ADDR_RTX(count, x) \
- gen_rtx_MEM (Pmode, memory_address (Pmode, plus_constant (tem, 1)))
+#define RETURN_ADDR_RTX(count, tem) avr_return_addr_rtx (count, tem)
/* Don't use Push rounding. expr.c: emit_single_push_insn is broken
for POST_DEC targets (PR27386). */
/* 'true' - if current function is a 'main' function
as specified by the "OS_main" attribute. */
int is_OS_main;
+
+ /* Current function stack size. */
+ int stack_usage;
};