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spu.c (struct machine_function): New data structure. 

* config/spu/spu.c (struct machine_function): New data structure.
	(spu_init_machine_status): New function.
	(spu_option_override): Install it.
	(get_pic_reg): Set and use cfun->machine->pic_reg.
	(spu_split_immediate): Do not set crtl->uses_pic_offset_table.
	(need_to_save_reg): Use cfun->machine->pic_reg instead of
	checking crtl->uses_pic_offset_table.
	(spu_expand_prologue): Likewise.

From-SVN: r180156
This commit is contained in:
Ulrich Weigand 2011-10-18 15:48:49 +00:00 committed by Ulrich Weigand
parent d8381c04c3
commit c5d942188b
2 changed files with 47 additions and 12 deletions
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11
gcc/ChangeLog
View File

@ -1,3 +1,14 @@
2011-10-18 Ulrich Weigand <Ulrich.Weigand@de.ibm.com>
* config/spu/spu.c (struct machine_function): New data structure.
(spu_init_machine_status): New function.
(spu_option_override): Install it.
(get_pic_reg): Set and use cfun->machine->pic_reg.
(spu_split_immediate): Do not set crtl->uses_pic_offset_table.
(need_to_save_reg): Use cfun->machine->pic_reg instead of
checking crtl->uses_pic_offset_table.
(spu_expand_prologue): Likewise.
2011-10-18 Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/50735

48
gcc/config/spu/spu.c
View File

@ -500,10 +500,27 @@ static void spu_setup_incoming_varargs (cumulative_args_t cum,
struct gcc_target targetm = TARGET_INITIALIZER;
/* Define the structure for the machine field in struct function. */
struct GTY(()) machine_function
{
/* Register to use for PIC accesses. */
rtx pic_reg;
};
/* How to allocate a 'struct machine_function'. */
static struct machine_function *
spu_init_machine_status (void)
{
return ggc_alloc_cleared_machine_function ();
}
/* Implement TARGET_OPTION_OVERRIDE. */
static void
spu_option_override (void)
{
/* Set up function hooks. */
init_machine_status = spu_init_machine_status;
/* Small loops will be unpeeled at -O3. For SPU it is more important
to keep code small by default. */
if (!flag_unroll_loops && !flag_peel_loops)
@ -1741,12 +1758,22 @@ print_operand (FILE * file, rtx x, int code)
static rtx
get_pic_reg (void)
{
rtx pic_reg = pic_offset_table_rtx;
if (!reload_completed && !reload_in_progress)
abort ();
if (current_function_is_leaf && !df_regs_ever_live_p (LAST_ARG_REGNUM))
pic_reg = gen_rtx_REG (SImode, LAST_ARG_REGNUM);
return pic_reg;
/* If we've already made the decision, we need to keep with it. Once we've
decided to use LAST_ARG_REGNUM, future calls to df_regs_ever_live_p may
return true since the register is now live; this should not cause us to
"switch back" to using pic_offset_table_rtx. */
if (!cfun->machine->pic_reg)
{
if (current_function_is_leaf && !df_regs_ever_live_p (LAST_ARG_REGNUM))
cfun->machine->pic_reg = gen_rtx_REG (SImode, LAST_ARG_REGNUM);
else
cfun->machine->pic_reg = pic_offset_table_rtx;
}
return cfun->machine->pic_reg;
}
/* Split constant addresses to handle cases that are too large.
@ -1849,7 +1876,6 @@ spu_split_immediate (rtx * ops)
{
rtx pic_reg = get_pic_reg ();
emit_insn (gen_addsi3 (ops[0], ops[0], pic_reg));
crtl->uses_pic_offset_table = 1;
}
return flag_pic || c == IC_IL2s;
}
@ -1875,9 +1901,7 @@ need_to_save_reg (int regno, int saving)
return 1;
if (flag_pic
&& regno == PIC_OFFSET_TABLE_REGNUM
&& (!saving || crtl->uses_pic_offset_table)
&& (!saving
|| !current_function_is_leaf || df_regs_ever_live_p (LAST_ARG_REGNUM)))
&& (!saving || cfun->machine->pic_reg == pic_offset_table_rtx))
return 1;
return 0;
}
@ -1991,8 +2015,8 @@ spu_expand_prologue (void)
rtx scratch_reg_0, scratch_reg_1;
rtx insn, real;
if (flag_pic && optimize == 0)
crtl->uses_pic_offset_table = 1;
if (flag_pic && optimize == 0 && !cfun->machine->pic_reg)
cfun->machine->pic_reg = pic_offset_table_rtx;
if (spu_naked_function_p (current_function_decl))
return;
@ -2029,9 +2053,9 @@ spu_expand_prologue (void)
}
}
if (flag_pic && crtl->uses_pic_offset_table)
if (flag_pic && cfun->machine->pic_reg)
{
rtx pic_reg = get_pic_reg ();
rtx pic_reg = cfun->machine->pic_reg;
insn = emit_insn (gen_load_pic_offset (pic_reg, scratch_reg_0));
insn = emit_insn (gen_subsi3 (pic_reg, pic_reg, scratch_reg_0));
}