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[AArch64] Restructure callee save slot allocation logic. 

Co-Authored-By: Jiong Wang <jiong.wang@arm.com>

From-SVN: r211271
This commit is contained in:
Marcus Shawcroft 2014-06-05 12:22:07 +00:00 committed by Marcus Shawcroft
parent 8799637aad
commit 97826595b5
2 changed files with 20 additions and 9 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2014-06-05 Marcus Shawcroft <marcus.shawcroft@arm.com>
Jiong Wang <jiong.wang@arm.com>
* config/aarch64/aarch64.c (SLOT_NOT_REQUIRED, SLOT_REQUIRED): Define.
(aarch64_layout_frame): Use SLOT_NOT_REQUIRED and SLOT_REQUIRED.
(aarch64_register_saved_on_entry): Adjust test.
2014-06-05 Marcus Shawcroft <marcus.shawcroft@arm.com>
* config/aarch64/aarch64.h (machine_function): Move

22
gcc/config/aarch64/aarch64.c
View File

@ -1812,28 +1812,32 @@ aarch64_layout_frame (void)
if (reload_completed && cfun->machine->frame.laid_out)
return;
#define SLOT_NOT_REQUIRED (-2)
#define SLOT_REQUIRED (-1)
/* First mark all the registers that really need to be saved... */
for (regno = R0_REGNUM; regno <= R30_REGNUM; regno++)
cfun->machine->frame.reg_offset[regno] = -1;
cfun->machine->frame.reg_offset[regno] = SLOT_NOT_REQUIRED;
for (regno = V0_REGNUM; regno <= V31_REGNUM; regno++)
cfun->machine->frame.reg_offset[regno] = -1;
cfun->machine->frame.reg_offset[regno] = SLOT_NOT_REQUIRED;
/* ... that includes the eh data registers (if needed)... */
if (crtl->calls_eh_return)
for (regno = 0; EH_RETURN_DATA_REGNO (regno) != INVALID_REGNUM; regno++)
cfun->machine->frame.reg_offset[EH_RETURN_DATA_REGNO (regno)] = 0;
cfun->machine->frame.reg_offset[EH_RETURN_DATA_REGNO (regno)]
= SLOT_REQUIRED;
/* ... and any callee saved register that dataflow says is live. */
for (regno = R0_REGNUM; regno <= R30_REGNUM; regno++)
if (df_regs_ever_live_p (regno)
&& !call_used_regs[regno])
cfun->machine->frame.reg_offset[regno] = 0;
cfun->machine->frame.reg_offset[regno] = SLOT_REQUIRED;
for (regno = V0_REGNUM; regno <= V31_REGNUM; regno++)
if (df_regs_ever_live_p (regno)
&& !call_used_regs[regno])
cfun->machine->frame.reg_offset[regno] = 0;
cfun->machine->frame.reg_offset[regno] = SLOT_REQUIRED;
if (frame_pointer_needed)
{
@ -1844,14 +1848,14 @@ aarch64_layout_frame (void)
/* Now assign stack slots for them. */
for (regno = R0_REGNUM; regno <= R28_REGNUM; regno++)
if (cfun->machine->frame.reg_offset[regno] != -1)
if (cfun->machine->frame.reg_offset[regno] == SLOT_REQUIRED)
{
cfun->machine->frame.reg_offset[regno] = offset;
offset += UNITS_PER_WORD;
}
for (regno = V0_REGNUM; regno <= V31_REGNUM; regno++)
if (cfun->machine->frame.reg_offset[regno] != -1)
if (cfun->machine->frame.reg_offset[regno] == SLOT_REQUIRED)
{
cfun->machine->frame.reg_offset[regno] = offset;
offset += UNITS_PER_WORD;
@ -1863,7 +1867,7 @@ aarch64_layout_frame (void)
offset += UNITS_PER_WORD;
}
if (cfun->machine->frame.reg_offset[R30_REGNUM] != -1)
if (cfun->machine->frame.reg_offset[R30_REGNUM] == SLOT_REQUIRED)
{
cfun->machine->frame.reg_offset[R30_REGNUM] = offset;
offset += UNITS_PER_WORD;
@ -1896,7 +1900,7 @@ aarch64_set_frame_expr (rtx frame_pattern)
static bool
aarch64_register_saved_on_entry (int regno)
{
return cfun->machine->frame.reg_offset[regno] != -1;
return cfun->machine->frame.reg_offset[regno] >= 0;
}