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save_world/rest_world for ppc-darwin.

Browse Source 
Approved by Geoff Keating.

From-SVN: r86191
This commit is contained in:
Fariborz Jahanian 2004-08-18 16:33:10 +00:00 committed by Fariborz Jahanian
parent 790ac0e12a
commit d62294f57e
5 changed files with 476 additions and 12 deletions
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26
gcc/ChangeLog
View File

@ -1,3 +1,29 @@
2004-08-18 Fariborz Jahanian <fjahanian@apple.com>
* config/rs6000/altivec.md: Add new patterns for calls to
save_world/rest_world functions.
* config/rs6000/rs6000-protos.h: (save_world_operation,
restore_world_operation) new declarations.
* config/rs6000/rs6000.c: (struct rs6000_stack) new world_save_p
field added.
(rs6000_stack_info): Set world_save_p field.
(save_world_operation): New function.
(restore_world_operation): New function.
(compute_save_world_info): New function.
(rs6000_stack_info): Call compute_save_world_info.
(rs6000_emit_prologue): Check for world_save_p and generate
pattern to call save_world for saving all non-volatile and
special registers.
(rs6000_emit_epilogue): Check for world_save_p and generate
pattern to call rest_world to restore saved registers.
config/rs6000/rs6000.h: macros FIRST_SAVED_ALTIVEC_REGNO,
FIRST_SAVED_FP_REGNO, FIRST_SAVED_GP_REGNO defined.
(rs6000_reg_names): New entries added for save_world_operation and
restore_world_operation.
2004-08-18 Caroline Tice <ctice@apple.com>
* Makefile.in (STAGEFEEDBACK_FLAGS_TO_PASS) Add

22
gcc/config/rs6000/altivec.md
View File

@ -295,6 +295,28 @@
}"
[(set_attr "type" "*")])
(define_insn "*save_world"
[(match_parallel 0 "save_world_operation"
[(clobber (match_operand:SI 1 "register_operand" "=l"))
(use (match_operand:SI 2 "call_operand" "s"))])]
"TARGET_MACHO && (DEFAULT_ABI == ABI_DARWIN) && TARGET_32BIT"
{
return "bl %z2";
}
[(set_attr "type" "branch")
(set_attr "length" "4")])
(define_insn "*restore_world"
[(match_parallel 0 "restore_world_operation"
[(return)
(use (match_operand:SI 1 "register_operand" "l"))
(use (match_operand:SI 2 "call_operand" "s"))
(clobber (match_operand:SI 3 "gpc_reg_operand" "=r"))])]
"TARGET_MACHO && (DEFAULT_ABI == ABI_DARWIN) && TARGET_32BIT"
{
return "b %z2";
})
;; Simple binary operations.
(define_insn "addv16qi3"

2
gcc/config/rs6000/rs6000-protos.h
View File

@ -89,6 +89,8 @@ extern bool legitimate_constant_pool_address_p (rtx);
extern int expand_block_clear (rtx[]);
extern int expand_block_move (rtx[]);
extern int load_multiple_operation (rtx, enum machine_mode);
extern int save_world_operation (rtx, enum machine_mode);
extern int restore_world_operation (rtx, enum machine_mode);
extern const char * rs6000_output_load_multiple (rtx[]);
extern int store_multiple_operation (rtx, enum machine_mode);
extern int branch_comparison_operator (rtx, enum machine_mode);

432
gcc/config/rs6000/rs6000.c
View File

@ -79,6 +79,8 @@ typedef struct rs6000_stack {
int toc_save_p; /* true if the TOC needs to be saved */
int push_p; /* true if we need to allocate stack space */
int calls_p; /* true if the function makes any calls */
int world_save_p; /* true if we're saving *everything*:
r13-r31, cr, f14-f31, vrsave, v20-v31 */
enum rs6000_abi abi; /* which ABI to use */
int gp_save_offset; /* offset to save GP regs from initial SP */
int fp_save_offset; /* offset to save FP regs from initial SP */
@ -714,6 +716,7 @@ static void rs6000_parse_tls_size_option (void);
static void rs6000_parse_yes_no_option (const char *, const char *, int *);
static int first_altivec_reg_to_save (void);
static unsigned int compute_vrsave_mask (void);
static void compute_save_world_info(rs6000_stack_t *info_ptr);
static void is_altivec_return_reg (rtx, void *);
static rtx generate_set_vrsave (rtx, rs6000_stack_t *, int);
int easy_vector_constant (rtx, enum machine_mode);
@ -8529,6 +8532,143 @@ expand_block_move (rtx operands[])
return 1;
}
/* Return 1 if OP is suitable for a save_world call in prologue. It is
known to be a PARALLEL. */
int
save_world_operation (rtx op, enum machine_mode mode ATTRIBUTE_UNUSED)
{
int index;
int i;
rtx elt;
int count = XVECLEN (op, 0);
if (count != 55)
return 0;
index = 0;
if (GET_CODE (XVECEXP (op, 0, index++)) != CLOBBER
|| GET_CODE (XVECEXP (op, 0, index++)) != USE)
return 0;
for (i=1; i <= 18; i++)
{
elt = XVECEXP (op, 0, index++);
if (GET_CODE (elt) != SET
|| GET_CODE (SET_DEST (elt)) != MEM
|| ! memory_operand (SET_DEST (elt), DFmode)
|| GET_CODE (SET_SRC (elt)) != REG
|| GET_MODE (SET_SRC (elt)) != DFmode)
return 0;
}
for (i=1; i <= 12; i++)
{
elt = XVECEXP (op, 0, index++);
if (GET_CODE (elt) != SET
|| GET_CODE (SET_DEST (elt)) != MEM
|| GET_CODE (SET_SRC (elt)) != REG
|| GET_MODE (SET_SRC (elt)) != V4SImode)
return 0;
}
for (i=1; i <= 19; i++)
{
elt = XVECEXP (op, 0, index++);
if (GET_CODE (elt) != SET
|| GET_CODE (SET_DEST (elt)) != MEM
|| ! memory_operand (SET_DEST (elt), Pmode)
|| GET_CODE (SET_SRC (elt)) != REG
|| GET_MODE (SET_SRC (elt)) != Pmode)
return 0;
}
elt = XVECEXP (op, 0, index++);
if (GET_CODE (elt) != SET
|| GET_CODE (SET_DEST (elt)) != MEM
|| ! memory_operand (SET_DEST (elt), Pmode)
|| GET_CODE (SET_SRC (elt)) != REG
|| REGNO (SET_SRC (elt)) != CR2_REGNO
|| GET_MODE (SET_SRC (elt)) != Pmode)
return 0;
if (GET_CODE (XVECEXP (op, 0, index++)) != USE
|| GET_CODE (XVECEXP (op, 0, index++)) != USE
|| GET_CODE (XVECEXP (op, 0, index++)) != CLOBBER)
return 0;
return 1;
}
/* Return 1 if OP is suitable for a save_world call in prologue. It is
known to be a PARALLEL. */
int
restore_world_operation (rtx op, enum machine_mode mode ATTRIBUTE_UNUSED)
{
int index;
int i;
rtx elt;
int count = XVECLEN (op, 0);
if (count != 59)
return 0;
index = 0;
if (GET_CODE (XVECEXP (op, 0, index++)) != RETURN
|| GET_CODE (XVECEXP (op, 0, index++)) != USE
|| GET_CODE (XVECEXP (op, 0, index++)) != USE
|| GET_CODE (XVECEXP (op, 0, index++)) != CLOBBER)
return 0;
elt = XVECEXP (op, 0, index++);
if (GET_CODE (elt) != SET
|| GET_CODE (SET_SRC (elt)) != MEM
|| ! memory_operand (SET_SRC (elt), Pmode)
|| GET_CODE (SET_DEST (elt)) != REG
|| REGNO (SET_DEST (elt)) != CR2_REGNO
|| GET_MODE (SET_DEST (elt)) != Pmode)
return 0;
for (i=1; i <= 19; i++)
{
elt = XVECEXP (op, 0, index++);
if (GET_CODE (elt) != SET
|| GET_CODE (SET_SRC (elt)) != MEM
|| ! memory_operand (SET_SRC (elt), Pmode)
|| GET_CODE (SET_DEST (elt)) != REG
|| GET_MODE (SET_DEST (elt)) != Pmode)
return 0;
}
for (i=1; i <= 12; i++)
{
elt = XVECEXP (op, 0, index++);
if (GET_CODE (elt) != SET
|| GET_CODE (SET_SRC (elt)) != MEM
|| GET_CODE (SET_DEST (elt)) != REG
|| GET_MODE (SET_DEST (elt)) != V4SImode)
return 0;
}
for (i=1; i <= 18; i++)
{
elt = XVECEXP (op, 0, index++);
if (GET_CODE (elt) != SET
|| GET_CODE (SET_SRC (elt)) != MEM
|| ! memory_operand (SET_SRC (elt), DFmode)
|| GET_CODE (SET_DEST (elt)) != REG
|| GET_MODE (SET_DEST (elt)) != DFmode)
return 0;
}
if (GET_CODE (XVECEXP (op, 0, index++)) != CLOBBER
|| GET_CODE (XVECEXP (op, 0, index++)) != CLOBBER
|| GET_CODE (XVECEXP (op, 0, index++)) != CLOBBER
|| GET_CODE (XVECEXP (op, 0, index++)) != CLOBBER
|| GET_CODE (XVECEXP (op, 0, index++)) != USE)
return 0;
return 1;
}
/* Return 1 if OP is a load multiple operation. It is known to be a
PARALLEL and the first section will be tested. */
@ -11362,6 +11502,57 @@ compute_vrsave_mask (void)
return mask;
}
/* For a very restricted set of circumstances, we can cut down the
size of prologs/epilogs by calling our own save/restore-the-world
routines. */
static void
compute_save_world_info(rs6000_stack_t *info_ptr)
{
info_ptr->world_save_p =
(DEFAULT_ABI == ABI_DARWIN)
&& ! (current_function_calls_setjmp && flag_exceptions)
&& info_ptr->first_fp_reg_save == FIRST_SAVED_FP_REGNO
&& info_ptr->first_gp_reg_save == FIRST_SAVED_GP_REGNO
&& info_ptr->first_altivec_reg_save == FIRST_SAVED_ALTIVEC_REGNO
&& info_ptr->cr_save_p;
/* This will not work in conjunction with sibcalls. Make sure there
are none. (This check is expensive, but seldom executed.) */
if ( info_ptr->world_save_p )
{
rtx insn;
for ( insn = get_last_insn_anywhere (); insn; insn = PREV_INSN (insn))
if ( GET_CODE (insn) == CALL_INSN
&& SIBLING_CALL_P (insn))
{
info_ptr->world_save_p = 0;
break;
}
}
if (info_ptr->world_save_p)
{
/* Even if we're not touching VRsave, make sure there's room on the
stack for it, if it looks like we're calling SAVE_WORLD, which
will attempt to save it. */
info_ptr->vrsave_size = 4;
/* "Save" the VRsave register too if we're saving the world. */
if (info_ptr->vrsave_mask == 0)
info_ptr->vrsave_mask = compute_vrsave_mask ();
/* Because the Darwin register save/restore routines only handle
F14 .. F31 and V20 .. V31 as per the ABI, perform a consistancy
check and abort if there's something worng. */
if (info_ptr->first_fp_reg_save < FIRST_SAVED_FP_REGNO
|| info_ptr->first_altivec_reg_save < FIRST_SAVED_ALTIVEC_REGNO)
abort ();
}
return;
}
static void
is_altivec_return_reg (rtx reg, void *xyes)
{
@ -11602,6 +11793,8 @@ rs6000_stack_info (void)
else
info_ptr->vrsave_size = 0;
compute_save_world_info (info_ptr);
/* Calculate the offsets. */
switch (DEFAULT_ABI)
{
@ -12716,8 +12909,128 @@ rs6000_emit_prologue (void)
rs6000_emit_stack_tie ();
}
/* Handle world saves specially here. */
if (info->world_save_p)
{
int i, j, sz;
rtx treg;
rtvec p;
/* save_world expects lr in r0. */
if (info->lr_save_p)
{
insn = emit_move_insn (gen_rtx_REG (Pmode, 0),
gen_rtx_REG (Pmode, LINK_REGISTER_REGNUM));
RTX_FRAME_RELATED_P (insn) = 1;
}
/* The SAVE_WORLD and RESTORE_WORLD routines make a number of
assumptions about the offsets of various bits of the stack
frame. Abort if things aren't what they should be. */
if (info->gp_save_offset != -220
|| info->fp_save_offset != -144
|| info->lr_save_offset != 8
|| info->cr_save_offset != 4
|| !info->push_p
|| !info->lr_save_p
|| (current_function_calls_eh_return && info->ehrd_offset != -432)
|| (info->vrsave_save_offset != -224
|| info->altivec_save_offset != (-224 -16 -192)))
abort ();
treg = gen_rtx_REG (SImode, 11);
emit_move_insn (treg, GEN_INT (-info->total_size));
/* SAVE_WORLD takes the caller's LR in R0 and the frame size
in R11. It also clobbers R12, so beware! */
/* Preserve CR2 for save_world prologues */
sz = 6;
sz += 32 - info->first_gp_reg_save;
sz += 64 - info->first_fp_reg_save;
sz += LAST_ALTIVEC_REGNO - info->first_altivec_reg_save + 1;
p = rtvec_alloc (sz);
j = 0;
RTVEC_ELT (p, j++) = gen_rtx_CLOBBER (VOIDmode,
gen_rtx_REG (Pmode,
LINK_REGISTER_REGNUM));
RTVEC_ELT (p, j++) = gen_rtx_USE (VOIDmode,
gen_rtx_SYMBOL_REF (Pmode,
"*save_world"));
/* We do floats first so that the instruction pattern matches
properly. */
for (i = 0; i < 64 - info->first_fp_reg_save; i++)
{
rtx reg = gen_rtx_REG (DFmode, info->first_fp_reg_save + i);
rtx addr = gen_rtx_PLUS (Pmode, frame_reg_rtx,
GEN_INT (info->fp_save_offset
+ sp_offset + 8 * i));
rtx mem = gen_rtx_MEM (DFmode, addr);
set_mem_alias_set (mem, rs6000_sr_alias_set);
RTVEC_ELT (p, j++) = gen_rtx_SET (VOIDmode, mem, reg);
}
for (i = 0; info->first_altivec_reg_save + i <= LAST_ALTIVEC_REGNO; i++)
{
rtx reg = gen_rtx_REG (V4SImode, info->first_altivec_reg_save + i);
rtx addr = gen_rtx_PLUS (Pmode, frame_reg_rtx,
GEN_INT (info->altivec_save_offset
+ sp_offset + 16 * i));
rtx mem = gen_rtx_MEM (V4SImode, addr);
set_mem_alias_set (mem, rs6000_sr_alias_set);
RTVEC_ELT (p, j++) = gen_rtx_SET (VOIDmode, mem, reg);
}
for (i = 0; i < 32 - info->first_gp_reg_save; i++)
{
rtx reg = gen_rtx_REG (reg_mode, info->first_gp_reg_save + i);
rtx addr = gen_rtx_PLUS (Pmode, frame_reg_rtx,
GEN_INT (info->gp_save_offset
+ sp_offset + reg_size * i));
rtx mem = gen_rtx_MEM (reg_mode, addr);
set_mem_alias_set (mem, rs6000_sr_alias_set);
RTVEC_ELT (p, j++) = gen_rtx_SET (VOIDmode, mem, reg);
}
{
/* CR register traditionally saved as CR2. */
rtx reg = gen_rtx_REG (reg_mode, CR2_REGNO);
rtx addr = gen_rtx_PLUS (Pmode, frame_reg_rtx,
GEN_INT (info->cr_save_offset
+ sp_offset));
rtx mem = gen_rtx_MEM (reg_mode, addr);
set_mem_alias_set (mem, rs6000_sr_alias_set);
RTVEC_ELT (p, j++) = gen_rtx_SET (VOIDmode, mem, reg);
}
/* Prevent any attempt to delete the setting of r0 and treg! */
RTVEC_ELT (p, j++) = gen_rtx_USE (VOIDmode, gen_rtx_REG (Pmode, 0));
RTVEC_ELT (p, j++) = gen_rtx_USE (VOIDmode, treg);
RTVEC_ELT (p, j++) = gen_rtx_CLOBBER (VOIDmode, sp_reg_rtx);
insn = emit_insn (gen_rtx_PARALLEL (VOIDmode, p));
rs6000_frame_related (insn, frame_ptr_rtx, info->total_size,
NULL_RTX, NULL_RTX);
if (current_function_calls_eh_return)
{
unsigned int i;
for (i = 0; ; ++i)
{
unsigned int regno = EH_RETURN_DATA_REGNO (i);
if (regno == INVALID_REGNUM)
break;
emit_frame_save (frame_reg_rtx, frame_ptr_rtx, reg_mode, regno,
info->ehrd_offset + sp_offset
+ reg_size * (int) i,
info->total_size);
}
}
}
/* Save AltiVec registers if needed. */
if (TARGET_ALTIVEC_ABI && info->altivec_size != 0)
if (! info->world_save_p && TARGET_ALTIVEC_ABI && info->altivec_size != 0)
{
int i;
@ -12758,7 +13071,7 @@ rs6000_emit_prologue (void)
epilogue. */
if (TARGET_ALTIVEC && TARGET_ALTIVEC_VRSAVE
&& info->vrsave_mask != 0)
&& ! info->world_save_p && info->vrsave_mask != 0)
{
rtx reg, mem, vrsave;
int offset;
@ -12786,7 +13099,7 @@ rs6000_emit_prologue (void)
}
/* If we use the link register, get it into r0. */
if (info->lr_save_p)
if (! info->world_save_p && info->lr_save_p)
{
insn = emit_move_insn (gen_rtx_REG (Pmode, 0),
gen_rtx_REG (Pmode, LINK_REGISTER_REGNUM));
@ -12794,7 +13107,7 @@ rs6000_emit_prologue (void)
}
/* If we need to save CR, put it into r12. */
if (info->cr_save_p && frame_reg_rtx != frame_ptr_rtx)
if (! info->world_save_p && info->cr_save_p && frame_reg_rtx != frame_ptr_rtx)
{
rtx set;
@ -12816,7 +13129,7 @@ rs6000_emit_prologue (void)
/* Do any required saving of fpr's. If only one or two to save, do
it ourselves. Otherwise, call function. */
if (saving_FPRs_inline)
if (! info->world_save_p && saving_FPRs_inline)
{
int i;
for (i = 0; i < 64 - info->first_fp_reg_save; i++)
@ -12827,7 +13140,7 @@ rs6000_emit_prologue (void)
info->fp_save_offset + sp_offset + 8 * i,
info->total_size);
}
else if (info->first_fp_reg_save != 64)
else if (! info->world_save_p && info->first_fp_reg_save != 64)
{
int i;
char rname[30];
@ -12863,7 +13176,7 @@ rs6000_emit_prologue (void)
/* Save GPRs. This is done as a PARALLEL if we are using
the store-multiple instructions. */
if (using_store_multiple)
if (! info->world_save_p && using_store_multiple)
{
rtvec p;
int i;
@ -12885,7 +13198,7 @@ rs6000_emit_prologue (void)
rs6000_frame_related (insn, frame_ptr_rtx, info->total_size,
NULL_RTX, NULL_RTX);
}
else
else if (! info->world_save_p)
{
int i;
for (i = 0; i < 32 - info->first_gp_reg_save; i++)
@ -12944,7 +13257,7 @@ rs6000_emit_prologue (void)
/* ??? There's no need to emit actual instructions here, but it's the
easiest way to get the frame unwind information emitted. */
if (current_function_calls_eh_return)
if (! info->world_save_p && current_function_calls_eh_return)
{
unsigned int i, regno;
@ -12979,7 +13292,7 @@ rs6000_emit_prologue (void)
}
/* Save lr if we used it. */
if (info->lr_save_p)
if (! info->world_save_p && info->lr_save_p)
{
rtx addr = gen_rtx_PLUS (Pmode, frame_reg_rtx,
GEN_INT (info->lr_save_offset + sp_offset));
@ -12994,7 +13307,7 @@ rs6000_emit_prologue (void)
}
/* Save CR if we use any that must be preserved. */
if (info->cr_save_p)
if (! info->world_save_p && info->cr_save_p)
{
rtx addr = gen_rtx_PLUS (Pmode, frame_reg_rtx,
GEN_INT (info->cr_save_offset + sp_offset));
@ -13027,7 +13340,7 @@ rs6000_emit_prologue (void)
/* Update stack and set back pointer unless this is V.4,
for which it was done previously. */
if (info->push_p
if (! info->world_save_p && info->push_p
&& !(DEFAULT_ABI == ABI_V4 || current_function_calls_eh_return))
rs6000_emit_allocate_stack (info->total_size, FALSE);
@ -13196,6 +13509,101 @@ rs6000_emit_epilogue (int sibcall)
|| rs6000_cpu == PROCESSOR_PPC750
|| optimize_size);
if (info->world_save_p)
{
int i, j;
char rname[30];
const char *alloc_rname;
rtvec p;
/* eh_rest_world_r10 will return to the location saved in the LR
stack slot (which is not likely to be our caller.)
Input: R10 -- stack adjustment. Clobbers R0, R11, R12, R7, R8.
rest_world is similar, except any R10 parameter is ignored.
The exception-handling stuff that was here in 2.95 is no
longer necessary. */
p = rtvec_alloc (9
+ 1
+ 32 - info->first_gp_reg_save
+ LAST_ALTIVEC_REGNO + 1 - info->first_altivec_reg_save
+ 63 + 1 - info->first_fp_reg_save);
strcpy (rname, (current_function_calls_eh_return) ?
"*eh_rest_world_r10" : "*rest_world");
alloc_rname = ggc_strdup (rname);
j = 0;
RTVEC_ELT (p, j++) = gen_rtx_RETURN (VOIDmode);
RTVEC_ELT (p, j++) = gen_rtx_USE (VOIDmode,
gen_rtx_REG (Pmode,
LINK_REGISTER_REGNUM));
RTVEC_ELT (p, j++)
= gen_rtx_USE (VOIDmode, gen_rtx_SYMBOL_REF (Pmode, alloc_rname));
/* The instruction pattern requires a clobber here;
it is shared with the restVEC helper. */
RTVEC_ELT (p, j++)
= gen_rtx_CLOBBER (VOIDmode, gen_rtx_REG (Pmode, 11));
{
/* CR register traditionally saved as CR2. */
rtx reg = gen_rtx_REG (reg_mode, CR2_REGNO);
rtx addr = gen_rtx_PLUS (Pmode, frame_reg_rtx,
GEN_INT (info->cr_save_offset));
rtx mem = gen_rtx_MEM (reg_mode, addr);
set_mem_alias_set (mem, rs6000_sr_alias_set);
RTVEC_ELT (p, j++) = gen_rtx_SET (VOIDmode, reg, mem);
}
for (i = 0; i < 32 - info->first_gp_reg_save; i++)
{
rtx reg = gen_rtx_REG (reg_mode, info->first_gp_reg_save + i);
rtx addr = gen_rtx_PLUS (Pmode, frame_reg_rtx,
GEN_INT (info->gp_save_offset
+ reg_size * i));
rtx mem = gen_rtx_MEM (reg_mode, addr);
set_mem_alias_set (mem, rs6000_sr_alias_set);
RTVEC_ELT (p, j++) = gen_rtx_SET (VOIDmode, reg, mem);
}
for (i = 0; info->first_altivec_reg_save + i <= LAST_ALTIVEC_REGNO; i++)
{
rtx reg = gen_rtx_REG (V4SImode, info->first_altivec_reg_save + i);
rtx addr = gen_rtx_PLUS (Pmode, frame_reg_rtx,
GEN_INT (info->altivec_save_offset
+ 16 * i));
rtx mem = gen_rtx_MEM (V4SImode, addr);
set_mem_alias_set (mem, rs6000_sr_alias_set);
RTVEC_ELT (p, j++) = gen_rtx_SET (VOIDmode, reg, mem);
}
for (i = 0; info->first_fp_reg_save + i <= 63; i++)
{
rtx reg = gen_rtx_REG (DFmode, info->first_fp_reg_save + i);
rtx addr = gen_rtx_PLUS (Pmode, frame_reg_rtx,
GEN_INT (info->fp_save_offset
+ 8 * i));
rtx mem = gen_rtx_MEM (DFmode, addr);
set_mem_alias_set (mem, rs6000_sr_alias_set);
RTVEC_ELT (p, j++) = gen_rtx_SET (VOIDmode, reg, mem);
}
RTVEC_ELT (p, j++)
= gen_rtx_CLOBBER (VOIDmode, gen_rtx_REG (Pmode, 0));
RTVEC_ELT (p, j++)
= gen_rtx_CLOBBER (VOIDmode, gen_rtx_REG (SImode, 12));
RTVEC_ELT (p, j++)
= gen_rtx_CLOBBER (VOIDmode, gen_rtx_REG (SImode, 7));
RTVEC_ELT (p, j++)
= gen_rtx_CLOBBER (VOIDmode, gen_rtx_REG (SImode, 8));
RTVEC_ELT (p, j++)
= gen_rtx_USE (VOIDmode, gen_rtx_REG (SImode, 10));
emit_jump_insn (gen_rtx_PARALLEL (VOIDmode, p));
return;
}
/* If we have a frame pointer, a call to alloca, or a large stack
frame, restore the old stack pointer using the backchain. Otherwise,
we know what size to update it with. */

6
gcc/config/rs6000/rs6000.h
View File

@ -916,6 +916,10 @@ extern const char *rs6000_warn_altivec_long_switch;
#define SPE_ACC_REGNO 111
#define SPEFSCR_REGNO 112
#define FIRST_SAVED_ALTIVEC_REGNO (FIRST_ALTIVEC_REGNO+20)
#define FIRST_SAVED_FP_REGNO (14+32)
#define FIRST_SAVED_GP_REGNO 13
/* List the order in which to allocate registers. Each register must be
listed once, even those in FIXED_REGISTERS.
@ -2587,6 +2591,8 @@ extern char rs6000_reg_names[][8]; /* register names (0 vs. %r0). */
{"lmw_operation", {PARALLEL}}, \
{"stmw_operation", {PARALLEL}}, \
{"vrsave_operation", {PARALLEL}}, \
{"save_world_operation", {PARALLEL}}, \
{"restore_world_operation", {PARALLEL}}, \
{"mfcr_operation", {PARALLEL}}, \
{"mtcrf_operation", {PARALLEL}}, \
{"branch_comparison_operator", {EQ, NE, LE, LT, GE, \