Skip to content

R
riscv-gcc-1
Commit ba6adec4 by Adam Nemet
Options

mips.h (FRAME_GROWS_DOWNWARD, [...]): Define new macros. 

	* config/mips/mips.h (FRAME_GROWS_DOWNWARD,
	MIPS_GP_SAVE_AREA_SIZE): Define new macros.
	(STARTING_FRAME_OFFSET): Return 0 if FRAME_GROWS_DOWNWARD.  Use
	MIPS_GP_SAVE_AREA_SIZE.
	* config/mips/mips.c (struct mips_frame_info): Update comment
	before arg_pointer_offset and hard_frame_pointer_offset.
	(mips_compute_frame_info): Update diagram before function: to
	correctly use stack_pointer_rtx for fp_sp_offset and gp_sp_offset, to
	indicate the position of frame_pointer_rtx with -fstack-protector and
	to show args_size.  Don't allocate cprestore area for leaf functions
	if FRAME_GROWS_DOWNWARD.  Use MIPS_GP_SAVE_AREA_SIZE to set
	cprestore_size.
	(mips_initial_elimination_offset): Update for FRAME_GROWS_DOWNWARD.

From-SVN: r147024
parent 794f21f9
Showing with 60 additions and 31 deletions
gcc/ChangeLog
2009-04-30 Adam Nemet <anemet@caviumnetworks.com>
* config/mips/mips.h (FRAME_GROWS_DOWNWARD,
MIPS_GP_SAVE_AREA_SIZE): Define new macros.
(STARTING_FRAME_OFFSET): Return 0 if FRAME_GROWS_DOWNWARD. Use
MIPS_GP_SAVE_AREA_SIZE.
* config/mips/mips.c (struct mips_frame_info): Update comment
before arg_pointer_offset and hard_frame_pointer_offset.
(mips_compute_frame_info): Update diagram before function: to
correctly use stack_pointer_rtx for fp_sp_offset and gp_sp_offset, to
indicate the position of frame_pointer_rtx with -fstack-protector and
to show args_size. Don't allocate cprestore area for leaf functions
if FRAME_GROWS_DOWNWARD. Use MIPS_GP_SAVE_AREA_SIZE to set
cprestore_size.
(mips_initial_elimination_offset): Update for FRAME_GROWS_DOWNWARD.
2009-04-30 Michael Matz <matz@suse.de>
PR tree-optimization/39955
* config/rs6000/rs6000.c (rs6000_check_sdmode): Also check SSA_NAMEs.
PR tree-optimization/39955
* config/rs6000/rs6000.c (rs6000_check_sdmode): Also check SSA_NAMEs.
2009-04-30 Dave Korn <dave.korn.cygwin@gmail.com>
......
gcc/config/mips/mips.c
......@@ -285,10 +285,10 @@ struct GTY(()) mips_frame_info {
HOST_WIDE_INT acc_sp_offset;
HOST_WIDE_INT cop0_sp_offset;
/* The offset of arg_pointer_rtx from frame_pointer_rtx. */
/* The offset of arg_pointer_rtx from the bottom of the frame. */
HOST_WIDE_INT arg_pointer_offset;
/* The offset of hard_frame_pointer_rtx from frame_pointer_rtx. */
/* The offset of hard_frame_pointer_rtx from the bottom of the frame. */
HOST_WIDE_INT hard_frame_pointer_offset;
};
......@@ -8673,16 +8673,16 @@ mips_save_reg_p (unsigned int regno)
| | + UNITS_PER_WORD
| accumulator save area |
| |
+-------------------------------+ <-- frame_pointer_rtx + fp_sp_offset
+-------------------------------+ <-- stack_pointer_rtx + fp_sp_offset
| | + UNITS_PER_HWFPVALUE
| FPR save area |
| |
+-------------------------------+ <-- frame_pointer_rtx + gp_sp_offset
+-------------------------------+ <-- stack_pointer_rtx + gp_sp_offset
| | + UNITS_PER_WORD
| GPR save area |
| |
+-------------------------------+
| | \
+-------------------------------+ <-- frame_pointer_rtx with
| | \ -fstack-protector
| local variables | | var_size
| | /
+-------------------------------+
......@@ -8690,16 +8690,17 @@ mips_save_reg_p (unsigned int regno)
| $gp save area | | cprestore_size
| | /
P +-------------------------------+ <-- hard_frame_pointer_rtx for
| | MIPS16 code
| outgoing stack arguments |
| |
+-------------------------------+
| |
| caller-allocated save area |
| for register arguments |
| |
| | \ MIPS16 code
| outgoing stack arguments | |
| | |
+-------------------------------+ | args_size
| | |
| caller-allocated save area | |
| for register arguments | |
| | /
+-------------------------------+ <-- stack_pointer_rtx
frame_pointer_rtx
frame_pointer_rtx without
-fstack-protector
hard_frame_pointer_rtx for
non-MIPS16 code.
......@@ -8744,11 +8745,11 @@ mips_compute_frame_info (void)
cfun->machine->global_pointer = mips_global_pointer ();
/* The first STARTING_FRAME_OFFSET bytes contain the outgoing argument
area and the $gp save slot. This area isn't needed in leaf functions,
but if the target-independent frame size is nonzero, we're committed
to allocating it anyway. */
if (size == 0 && current_function_is_leaf)
/* The first two blocks contain the outgoing argument area and the $gp save
slot. This area isn't needed in leaf functions, but if the
target-independent frame size is nonzero, we have already committed to
allocating these in STARTING_FRAME_OFFSET for !FRAME_GROWS_DOWNWARD. */
if ((size == 0 || FRAME_GROWS_DOWNWARD) && current_function_is_leaf)
{
/* The MIPS 3.0 linker does not like functions that dynamically
allocate the stack and have 0 for STACK_DYNAMIC_OFFSET, since it
......@@ -8763,7 +8764,7 @@ mips_compute_frame_info (void)
else
{
frame->args_size = crtl->outgoing_args_size;
frame->cprestore_size = STARTING_FRAME_OFFSET - frame->args_size;
frame->cprestore_size = MIPS_GP_SAVE_AREA_SIZE;
}
offset = frame->args_size + frame->cprestore_size;
......@@ -8942,12 +8943,16 @@ mips_initial_elimination_offset (int from, int to)
mips_compute_frame_info ();
/* Set OFFSET to the offset from the soft frame pointer, which is also
the offset from the end-of-prologue stack pointer. */
/* Set OFFSET to the offset from the end-of-prologue stack pointer. */
switch (from)
{
case FRAME_POINTER_REGNUM:
offset = 0;
if (FRAME_GROWS_DOWNWARD)
offset = (cfun->machine->frame.args_size
+ cfun->machine->frame.cprestore_size
+ cfun->machine->frame.var_size);
else
offset = 0;
break;
case ARG_POINTER_REGNUM:
......
gcc/config/mips/mips.h
......@@ -2081,12 +2081,20 @@ enum reg_class
#define STACK_GROWS_DOWNWARD
/* The offset of the first local variable from the beginning of the frame.
See mips_compute_frame_info for details about the frame layout. */
#define FRAME_GROWS_DOWNWARD flag_stack_protect
#define STARTING_FRAME_OFFSET \
(crtl->outgoing_args_size \
+ (TARGET_CALL_CLOBBERED_GP ? MIPS_STACK_ALIGN (UNITS_PER_WORD) : 0))
/* Size of the area allocated in the frame to save the GP. */
#define MIPS_GP_SAVE_AREA_SIZE \
(TARGET_CALL_CLOBBERED_GP ? MIPS_STACK_ALIGN (UNITS_PER_WORD) : 0)
/* The offset of the first local variable from the frame pointer. See
mips_compute_frame_info for details about the frame layout. */
#define STARTING_FRAME_OFFSET \
(FRAME_GROWS_DOWNWARD \
? 0 \
: crtl->outgoing_args_size + MIPS_GP_SAVE_AREA_SIZE)
#define RETURN_ADDR_RTX mips_return_addr
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment