On Wed, May 19, 2021 at 5:55 AM H.J. Lu <hjl.to...@gmail.com> wrote:
>
> On Wed, May 19, 2021 at 2:25 AM Richard Biener
> <richard.guent...@gmail.com> wrote:
> >
> > On Tue, May 18, 2021 at 9:16 PM H.J. Lu <hjl.to...@gmail.com> wrote:
> > >
> > > Add TARGET_READ_MEMSET_VALUE and TARGET_GEN_MEMSET_VALUE to support
> > > target instructions to duplicate QImode value to TImode/OImode/XImode
> > > value for memmset.
> > >
> > > PR middle-end/90773
> > > * builtins.c (builtin_memset_read_str): Call
> > > targetm.read_memset_value.
> > > (builtin_memset_gen_str): Call targetm.gen_memset_value.
> > > * target.def (read_memset_value): New hook.
> > > (gen_memset_value): Likewise.
> > > * targhooks.c: Inclue "builtins.h".
> > > (default_read_memset_value): New function.
> > > (default_gen_memset_value): Likewise.
> > > * targhooks.h (default_read_memset_value): New prototype.
> > > (default_gen_memset_value): Likewise.
> > > * doc/tm.texi.in: Add TARGET_READ_MEMSET_VALUE and
> > > TARGET_GEN_MEMSET_VALUE hooks.
> > > * doc/tm.texi: Regenerated.
> > > ---
> > > gcc/builtins.c | 47 ++++----------------------------------
> > > gcc/doc/tm.texi | 16 +++++++++++++
> > > gcc/doc/tm.texi.in | 4 ++++
> > > gcc/target.def | 20 +++++++++++++++++
> > > gcc/targhooks.c | 56 ++++++++++++++++++++++++++++++++++++++++++++++
> > > gcc/targhooks.h | 4 ++++
> > > 6 files changed, 104 insertions(+), 43 deletions(-)
> > >
> > > diff --git a/gcc/builtins.c b/gcc/builtins.c
> > > index e1b284846b1..f78a36478ef 100644
> > > --- a/gcc/builtins.c
> > > +++ b/gcc/builtins.c
> > > @@ -6584,24 +6584,11 @@ expand_builtin_strncpy (tree exp, rtx target)
> > > previous iteration. */
> > >
> > > rtx
> > > -builtin_memset_read_str (void *data, void *prevp,
> > > +builtin_memset_read_str (void *data, void *prev,
> > > HOST_WIDE_INT offset ATTRIBUTE_UNUSED,
> > > scalar_int_mode mode)
> > > {
> > > - by_pieces_prev *prev = (by_pieces_prev *) prevp;
> > > - if (prev != nullptr && prev->data != nullptr)
> > > - {
> > > - /* Use the previous data in the same mode. */
> > > - if (prev->mode == mode)
> > > - return prev->data;
> > > - }
> > > -
> > > - const char *c = (const char *) data;
> > > - char *p = XALLOCAVEC (char, GET_MODE_SIZE (mode));
> > > -
> > > - memset (p, *c, GET_MODE_SIZE (mode));
> > > -
> > > - return c_readstr (p, mode);
> > > + return targetm.read_memset_value ((const char *) data, prev, mode);
> > > }
> > >
> > > /* Callback routine for store_by_pieces. Return the RTL of a register
> > > @@ -6611,37 +6598,11 @@ builtin_memset_read_str (void *data, void *prevp,
> > > nullptr, it has the RTL info from the previous iteration. */
> > >
> > > static rtx
> > > -builtin_memset_gen_str (void *data, void *prevp,
> > > +builtin_memset_gen_str (void *data, void *prev,
> > > HOST_WIDE_INT offset ATTRIBUTE_UNUSED,
> > > scalar_int_mode mode)
> > > {
> > > - rtx target, coeff;
> > > - size_t size;
> > > - char *p;
> > > -
> > > - by_pieces_prev *prev = (by_pieces_prev *) prevp;
> > > - if (prev != nullptr && prev->data != nullptr)
> > > - {
> > > - /* Use the previous data in the same mode. */
> > > - if (prev->mode == mode)
> > > - return prev->data;
> > > -
> > > - target = simplify_gen_subreg (mode, prev->data, prev->mode, 0);
> > > - if (target != nullptr)
> > > - return target;
> > > - }
> > > -
> > > - size = GET_MODE_SIZE (mode);
> > > - if (size == 1)
> > > - return (rtx) data;
> > > -
> > > - p = XALLOCAVEC (char, size);
> > > - memset (p, 1, size);
> > > - coeff = c_readstr (p, mode);
> > > -
> > > - target = convert_to_mode (mode, (rtx) data, 1);
> > > - target = expand_mult (mode, target, coeff, NULL_RTX, 1);
> > > - return force_reg (mode, target);
> > > + return targetm.gen_memset_value ((rtx) data, prev, mode);
> > > }
> > >
> > > /* Expand expression EXP, which is a call to the memset builtin. Return
> > > diff --git a/gcc/doc/tm.texi b/gcc/doc/tm.texi
> > > index 85ea9395560..51385044e76 100644
> > > --- a/gcc/doc/tm.texi
> > > +++ b/gcc/doc/tm.texi
> > > @@ -11868,6 +11868,22 @@ This function prepares to emit a conditional
> > > comparison within a sequence
> > > @var{bit_code} is @code{AND} or @code{IOR}, which is the op on the
> > > compares.
> > > @end deftypefn
> > >
> > > +@deftypefn {Target Hook} rtx TARGET_READ_MEMSET_VALUE (const char
> > > *@var{c}, void *@var{prev}, scalar_int_mode @var{mode})
> > > +This function returns the RTL of a constant integer corresponding to
> > > +target reading @code{GET_MODE_SIZE (@var{mode})} bytes from the stringn
> > > +constant @var{str}. If @var{prev} is not @samp{nullptr}, it contains
> > > +the RTL information from the previous interation.
> > > +@end deftypefn
> > > +
> > > +@deftypefn {Target Hook} rtx TARGET_GEN_MEMSET_VALUE (rtx @var{data},
> > > void *@var{prev}, scalar_int_mode @var{mode})
> > > +This function returns the RTL of a register containing
> > > +@code{GET_MODE_SIZE (@var{mode})} consecutive copies of the unsigned
> > > +char value given in the RTL register @var{data}. For example, if
> > > +@var{mode} is 4 bytes wide, return the RTL for 0x01010101*@var{data}.
> > > +If @var{PREV} is not @samp{nullptr}, it is the RTL information from
> > > +the previous iteration.
> > > +@end deftypefn
> > > +
> > > @deftypefn {Target Hook} unsigned TARGET_LOOP_UNROLL_ADJUST (unsigned
> > > @var{nunroll}, class loop *@var{loop})
> > > This target hook returns a new value for the number of times @var{loop}
> > > should be unrolled. The parameter @var{nunroll} is the number of times
> > > diff --git a/gcc/doc/tm.texi.in b/gcc/doc/tm.texi.in
> > > index d8e3de14af1..8d4c3949fbf 100644
> > > --- a/gcc/doc/tm.texi.in
> > > +++ b/gcc/doc/tm.texi.in
> > > @@ -7956,6 +7956,10 @@ lists.
> > >
> > > @hook TARGET_GEN_CCMP_NEXT
> > >
> > > +@hook TARGET_READ_MEMSET_VALUE
> > > +
> > > +@hook TARGET_GEN_MEMSET_VALUE
> > > +
> > > @hook TARGET_LOOP_UNROLL_ADJUST
> > >
> > > @defmac POWI_MAX_MULTS
> > > diff --git a/gcc/target.def b/gcc/target.def
> > > index bbaf6b4f3a0..c9aca40fa88 100644
> > > --- a/gcc/target.def
> > > +++ b/gcc/target.def
> > > @@ -2694,6 +2694,26 @@ DEFHOOK
> > > rtx, (rtx_insn **prep_seq, rtx_insn **gen_seq, rtx prev, int cmp_code,
> > > tree op0, tree op1, int bit_code),
> > > NULL)
> > >
> > > +DEFHOOK
> > > +(read_memset_value,
> > > + "This function returns the RTL of a constant integer corresponding to\n\
> > > +target reading @code{GET_MODE_SIZE (@var{mode})} bytes from the
> > > stringn\n\
> > > +constant @var{str}. If @var{prev} is not @samp{nullptr}, it contains\n\
> >
> > where is 'str' defined? I can't really tell what's the difference
>
> Fixed with
>
> diff --git a/gcc/target.def b/gcc/target.def
> index c9aca40fa88..4c3a5fcc634 100644
> --- a/gcc/target.def
> +++ b/gcc/target.def
> @@ -2699,8 +2699,8 @@ DEFHOOK
> "This function returns the RTL of a constant integer corresponding to\n\
> target reading @code{GET_MODE_SIZE (@var{mode})} bytes from the string\n\
> constant @var{str}. If @var{prev} is not @samp{nullptr}, it contains\n\
> -the RTL information from the previous interation.",
> - rtx, (const char *c, void *prev, scalar_int_mode mode),
> +the RTL information from the previous iteration.",
> + rtx, (const char *str, void *prev, scalar_int_mode mode),
> default_read_memset_value)
>
> DEFHOOK
>
> > from read_memset_value
> > and gen_memset_value.
>
> The difference is that input of read_memset_value is a string constant
> like "123" and input of gen_memset_value is an RTL register.
>
> > Somehow I feel that an optab for the "splat" operation similar
> > to vec_duplicate might be a better way to expose this - of course
> > that doesn't handle the "prev" thing.
>
> The x86 backend has ix86_expand_vector_init_duplicate () to
> broadcast QImode to TImode/OImode/XImode:
>
> /* A subroutine of ix86_expand_vector_init. Store into TARGET a vector
> with all elements equal to VAR. Return true if successful. */
>
> bool
> ix86_expand_vector_init_duplicate (bool mmx_ok, machine_mode mode,
> rtx target, rtx val)
>
> > So how's this the right point of abstraction to the target?
>
> I can add 2 target hooks, one for scratch register and one for
> broadcasting QImode to TImode/OImode/XImode. Then I can
> move x86 codes to the middle-end.
>
Here is the patch to add 3 target hooks:
-- Target Hook: rtx TARGET_READ_MEMSET_VALUE (const char *C,
scalar_int_mode MODE)
This function returns the RTL of a constant integer corresponding
to target reading 'GET_MODE_SIZE (MODE)' bytes from the string
constant C.
-- Target Hook: rtx TARGET_GEN_MEMSET_VALUE (rtx DATA, scalar_int_mode
MODE)
This function returns the RTL of a register containing
'GET_MODE_SIZE (MODE)' consecutive copies of the unsigned char
value given in the RTL register DATA. For example, if MODE is 4
bytes wide, return the RTL for 0x01010101*DATA.
-- Target Hook: rtx TARGET_GEN_MEMSET_VALUE_FROM_PREV (void *PREV,
scalar_int_mode MODE)
This function returns the RTL of a register in MODE generated from
PREV in the previous iteration.
with
/* Return the RTL of a register in MODE generated from PREV in the
previous iteration. */
static rtx
gen_memset_value_from_prev (void *prevp, scalar_int_mode mode)
{
by_pieces_prev *prev = (by_pieces_prev *) prevp;
rtx value;
if (prev != nullptr && prev->data != nullptr)
{
/* Use the previous data in the same mode. */
if (prev->mode == mode)
return prev->data;
value = targetm.gen_memset_value_from_prev (prevp, mode);
}
else
value = nullptr;
return value;
}
/* Callback routine for store_by_pieces. Read GET_MODE_BITSIZE (MODE)
bytes from constant string DATA + OFFSET and return it as target
constant. If PREV isn't nullptr, it has the RTL info from the
previous iteration. */
rtx
builtin_memset_read_str (void *data, void *prev,
HOST_WIDE_INT offset ATTRIBUTE_UNUSED,
scalar_int_mode mode)
{
const char *str = (const char *) data;
/* Don't use the previous value if size is 1. */
if (GET_MODE_SIZE (mode) == 1)
return default_read_memset_value (str, mode);
rtx value = gen_memset_value_from_prev (prev, mode);
if (value)
return value;
return targetm.read_memset_value (str, mode);
}
/* Callback routine for store_by_pieces. Return the RTL of a register
containing GET_MODE_SIZE (MODE) consecutive copies of the unsigned
char value given in the RTL register data. For example, if mode is
4 bytes wide, return the RTL for 0x01010101*data. If PREV isn't
nullptr, it has the RTL info from the previous iteration. */
static rtx
builtin_memset_gen_str (void *datap, void *prev,
HOST_WIDE_INT offset ATTRIBUTE_UNUSED,
scalar_int_mode mode)
{
rtx data = (rtx) datap;
/* Don't use the previous value if size is 1. */
if (GET_MODE_SIZE (mode) == 1)
return data;
rtx value = gen_memset_value_from_prev (prev, mode);
if (value)
return value;
return targetm.gen_memset_value (data, mode);
}
--
H.J.
From fdb029353d7f5597d5f51aaff9131ff6bb1acf12 Mon Sep 17 00:00:00 2001
From: "H.J. Lu" <hjl.tools@gmail.com>
Date: Sun, 6 Mar 2016 06:38:21 -0800
Subject: [PATCH] Add 3 target hooks for memset
Add TARGET_READ_MEMSET_VALUE, TARGET_GEN_MEMSET_VALUE and
TARGET_GEN_MEMSET_VALUE_FROM_PREV to support target instructions to
duplicate QImode value to TImode/OImode/XImode value for memmset.
PR middle-end/90773
* builtins.c: Include "targhooks.h".
(gen_memset_value_from_prev): New function.
(builtin_memset_read_str): Rewrite.
(builtin_memset_gen_str): Likewise.
* target.def (read_memset_value): New hook.
(gen_memset_value): Likewise.
(gen_memset_value_from_prev): Likewise.
* targhooks.c: Inclue "builtins.h".
(default_read_memset_value): New function.
(default_gen_memset_value): Likewise.
(default_gen_memset_value_from_prev): Likewise.
* targhooks.h (default_read_memset_value): New prototype.
(default_gen_memset_value): Likewise.
(default_gen_memset_value_from_prev): Likewise.
* doc/tm.texi.in: Add TARGET_READ_MEMSET_VALUE
TARGET_GEN_MEMSET_VALUE and TARGET_GEN_MEMSET_VALUE_FROM_PREV
hooks.
* doc/tm.texi: Regenerated.
---
gcc/builtins.c | 75 ++++++++++++++++++++++++----------------------
gcc/doc/tm.texi | 18 +++++++++++
gcc/doc/tm.texi.in | 6 ++++
gcc/target.def | 24 +++++++++++++++
gcc/targhooks.c | 44 +++++++++++++++++++++++++++
gcc/targhooks.h | 4 +++
6 files changed, 135 insertions(+), 36 deletions(-)
diff --git a/gcc/builtins.c b/gcc/builtins.c
index b0c880dc3b5..1ee580094ec 100644
--- a/gcc/builtins.c
+++ b/gcc/builtins.c
@@ -79,6 +79,7 @@ along with GCC; see the file COPYING3. If not see
#include "tree-outof-ssa.h"
#include "attr-fnspec.h"
#include "demangle.h"
+#include "targhooks.h"
struct target_builtins default_target_builtins;
#if SWITCHABLE_TARGET
@@ -6584,30 +6585,48 @@ expand_builtin_strncpy (tree exp, rtx target)
return NULL_RTX;
}
-/* Callback routine for store_by_pieces. Read GET_MODE_BITSIZE (MODE)
- bytes from constant string DATA + OFFSET and return it as target
- constant. If PREV isn't nullptr, it has the RTL info from the
+/* Return the RTL of a register in MODE generated from PREV in the
previous iteration. */
-rtx
-builtin_memset_read_str (void *data, void *prevp,
- HOST_WIDE_INT offset ATTRIBUTE_UNUSED,
- scalar_int_mode mode)
+static rtx
+gen_memset_value_from_prev (void *prevp, scalar_int_mode mode)
{
by_pieces_prev *prev = (by_pieces_prev *) prevp;
+ rtx value;
if (prev != nullptr && prev->data != nullptr)
{
/* Use the previous data in the same mode. */
if (prev->mode == mode)
return prev->data;
+
+ value = targetm.gen_memset_value_from_prev (prevp, mode);
}
+ else
+ value = nullptr;
+ return value;
+}
- const char *c = (const char *) data;
- char *p = XALLOCAVEC (char, GET_MODE_SIZE (mode));
+/* Callback routine for store_by_pieces. Read GET_MODE_BITSIZE (MODE)
+ bytes from constant string DATA + OFFSET and return it as target
+ constant. If PREV isn't nullptr, it has the RTL info from the
+ previous iteration. */
- memset (p, *c, GET_MODE_SIZE (mode));
+rtx
+builtin_memset_read_str (void *data, void *prev,
+ HOST_WIDE_INT offset ATTRIBUTE_UNUSED,
+ scalar_int_mode mode)
+{
+ const char *str = (const char *) data;
+
+ /* Don't use the previous value if size is 1. */
+ if (GET_MODE_SIZE (mode) == 1)
+ return default_read_memset_value (str, mode);
- return c_readstr (p, mode);
+ rtx value = gen_memset_value_from_prev (prev, mode);
+ if (value)
+ return value;
+
+ return targetm.read_memset_value (str, mode);
}
/* Callback routine for store_by_pieces. Return the RTL of a register
@@ -6617,37 +6636,21 @@ builtin_memset_read_str (void *data, void *prevp,
nullptr, it has the RTL info from the previous iteration. */
static rtx
-builtin_memset_gen_str (void *data, void *prevp,
+builtin_memset_gen_str (void *datap, void *prev,
HOST_WIDE_INT offset ATTRIBUTE_UNUSED,
scalar_int_mode mode)
{
- rtx target, coeff;
- size_t size;
- char *p;
-
- by_pieces_prev *prev = (by_pieces_prev *) prevp;
- if (prev != nullptr && prev->data != nullptr)
- {
- /* Use the previous data in the same mode. */
- if (prev->mode == mode)
- return prev->data;
-
- target = simplify_gen_subreg (mode, prev->data, prev->mode, 0);
- if (target != nullptr)
- return target;
- }
+ rtx data = (rtx) datap;
- size = GET_MODE_SIZE (mode);
- if (size == 1)
- return (rtx) data;
+ /* Don't use the previous value if size is 1. */
+ if (GET_MODE_SIZE (mode) == 1)
+ return data;
- p = XALLOCAVEC (char, size);
- memset (p, 1, size);
- coeff = c_readstr (p, mode);
+ rtx value = gen_memset_value_from_prev (prev, mode);
+ if (value)
+ return value;
- target = convert_to_mode (mode, (rtx) data, 1);
- target = expand_mult (mode, target, coeff, NULL_RTX, 1);
- return force_reg (mode, target);
+ return targetm.gen_memset_value (data, mode);
}
/* Expand expression EXP, which is a call to the memset builtin. Return
diff --git a/gcc/doc/tm.texi b/gcc/doc/tm.texi
index 85ea9395560..4119961e4fd 100644
--- a/gcc/doc/tm.texi
+++ b/gcc/doc/tm.texi
@@ -11868,6 +11868,24 @@ This function prepares to emit a conditional comparison within a sequence
@var{bit_code} is @code{AND} or @code{IOR}, which is the op on the compares.
@end deftypefn
+@deftypefn {Target Hook} rtx TARGET_READ_MEMSET_VALUE (const char *@var{c}, scalar_int_mode @var{mode})
+This function returns the RTL of a constant integer corresponding to
+target reading @code{GET_MODE_SIZE (@var{mode})} bytes from the string
+constant @var{c}.
+@end deftypefn
+
+@deftypefn {Target Hook} rtx TARGET_GEN_MEMSET_VALUE (rtx @var{data}, scalar_int_mode @var{mode})
+This function returns the RTL of a register containing
+@code{GET_MODE_SIZE (@var{mode})} consecutive copies of the unsigned
+char value given in the RTL register @var{data}. For example, if
+@var{mode} is 4 bytes wide, return the RTL for 0x01010101*@var{data}.
+@end deftypefn
+
+@deftypefn {Target Hook} rtx TARGET_GEN_MEMSET_VALUE_FROM_PREV (void *@var{prev}, scalar_int_mode @var{mode})
+This function returns the RTL of a register in @var{mode} generated
+from @var{PREV} in the previous iteration.
+@end deftypefn
+
@deftypefn {Target Hook} unsigned TARGET_LOOP_UNROLL_ADJUST (unsigned @var{nunroll}, class loop *@var{loop})
This target hook returns a new value for the number of times @var{loop}
should be unrolled. The parameter @var{nunroll} is the number of times
diff --git a/gcc/doc/tm.texi.in b/gcc/doc/tm.texi.in
index d8e3de14af1..443ea26ff15 100644
--- a/gcc/doc/tm.texi.in
+++ b/gcc/doc/tm.texi.in
@@ -7956,6 +7956,12 @@ lists.
@hook TARGET_GEN_CCMP_NEXT
+@hook TARGET_READ_MEMSET_VALUE
+
+@hook TARGET_GEN_MEMSET_VALUE
+
+@hook TARGET_GEN_MEMSET_VALUE_FROM_PREV
+
@hook TARGET_LOOP_UNROLL_ADJUST
@defmac POWI_MAX_MULTS
diff --git a/gcc/target.def b/gcc/target.def
index bbaf6b4f3a0..e6592f2582d 100644
--- a/gcc/target.def
+++ b/gcc/target.def
@@ -2694,6 +2694,30 @@ DEFHOOK
rtx, (rtx_insn **prep_seq, rtx_insn **gen_seq, rtx prev, int cmp_code, tree op0, tree op1, int bit_code),
NULL)
+DEFHOOK
+(read_memset_value,
+ "This function returns the RTL of a constant integer corresponding to\n\
+target reading @code{GET_MODE_SIZE (@var{mode})} bytes from the string\n\
+constant @var{c}.",
+ rtx, (const char *c, scalar_int_mode mode),
+ default_read_memset_value)
+
+DEFHOOK
+(gen_memset_value,
+ "This function returns the RTL of a register containing\n\
+@code{GET_MODE_SIZE (@var{mode})} consecutive copies of the unsigned\n\
+char value given in the RTL register @var{data}. For example, if\n\
+@var{mode} is 4 bytes wide, return the RTL for 0x01010101*@var{data}.",
+ rtx, (rtx data, scalar_int_mode mode),
+ default_gen_memset_value)
+
+DEFHOOK
+(gen_memset_value_from_prev,
+ "This function returns the RTL of a register in @var{mode} generated\n\
+from @var{PREV} in the previous iteration.",
+ rtx, (void *prev, scalar_int_mode mode),
+ default_gen_memset_value_from_prev)
+
/* Return a new value for loop unroll size. */
DEFHOOK
(loop_unroll_adjust,
diff --git a/gcc/targhooks.c b/gcc/targhooks.c
index 2d2de0431f3..a93e1e4b491 100644
--- a/gcc/targhooks.c
+++ b/gcc/targhooks.c
@@ -93,6 +93,7 @@ along with GCC; see the file COPYING3. If not see
#include "gimple.h"
#include "cfgloop.h"
#include "tree-vectorizer.h"
+#include "builtins.h"
bool
default_legitimate_address_p (machine_mode mode ATTRIBUTE_UNUSED,
@@ -2634,4 +2635,47 @@ default_memtag_untagged_pointer (rtx tagged_pointer, rtx target)
return untagged_base;
}
+/* Default implementation of TARGET_READ_MEMSET_VALUE. */
+
+rtx
+default_read_memset_value (const char *c, scalar_int_mode mode)
+{
+ char *p = XALLOCAVEC (char, GET_MODE_SIZE (mode));
+
+ memset (p, *c, GET_MODE_SIZE (mode));
+
+ return c_readstr (p, mode);
+}
+
+/* Default implementation of TARGET_GEN_MEMSET_VALUE. */
+
+rtx
+default_gen_memset_value (rtx data, scalar_int_mode mode)
+{
+ rtx target, coeff;
+ size_t size;
+ char *p;
+
+ size = GET_MODE_SIZE (mode);
+ if (size == 1)
+ return data;
+
+ p = XALLOCAVEC (char, size);
+ memset (p, 1, size);
+ coeff = c_readstr (p, mode);
+
+ target = convert_to_mode (mode, data, 1);
+ target = expand_mult (mode, target, coeff, NULL_RTX, 1);
+ return force_reg (mode, target);
+}
+
+/* Default implementation of TARGET_GEN_MEMSET_VALUE_FROM_PREV. */
+
+rtx
+default_gen_memset_value_from_prev (void *prevp, scalar_int_mode mode)
+{
+ by_pieces_prev *prev = (by_pieces_prev *) prevp;
+ return simplify_gen_subreg (mode, prev->data, prev->mode, 0);
+}
+
#include "gt-targhooks.h"
diff --git a/gcc/targhooks.h b/gcc/targhooks.h
index b537038c0aa..bb103159ae3 100644
--- a/gcc/targhooks.h
+++ b/gcc/targhooks.h
@@ -300,4 +300,8 @@ extern rtx default_memtag_set_tag (rtx, rtx, rtx);
extern rtx default_memtag_extract_tag (rtx, rtx);
extern rtx default_memtag_untagged_pointer (rtx, rtx);
+extern rtx default_read_memset_value (const char *, scalar_int_mode);
+extern rtx default_gen_memset_value (rtx, scalar_int_mode);
+extern rtx default_gen_memset_value_from_prev (void *, scalar_int_mode);
+
#endif /* GCC_TARGHOOKS_H */
--
2.31.1
