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aarch64: Commonise some folding code

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Add an aarch64_sve::gimple_folder helper for folding calls
to integer constants.  SME will make more use of this.

gcc/
	* config/aarch64/aarch64-sve-builtins.h
	(gimple_folder::fold_to_cstu): New member function.
	* config/aarch64/aarch64-sve-builtins.cc
	(gimple_folder::fold_to_cstu): Define.
	* config/aarch64/aarch64-sve-builtins-base.cc
	(svcnt_bhwd_impl::fold): Use it.
This commit is contained in:
Richard Sandiford 2022-10-20 10:37:35 +01:00
parent 7bca7218ac
commit df99e9e420
3 changed files with 10 additions and 7 deletions
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9
gcc/config/aarch64/aarch64-sve-builtins-base.cc
View file

@ -517,9 +517,7 @@ public:
gimple *
fold (gimple_folder &f) const override
{
tree count = build_int_cstu (TREE_TYPE (f.lhs),
GET_MODE_NUNITS (m_ref_mode));
return gimple_build_assign (f.lhs, count);
return f.fold_to_cstu (GET_MODE_NUNITS (m_ref_mode));
}
rtx
@ -553,10 +551,7 @@ public:
unsigned int elements_per_vq = 128 / GET_MODE_UNIT_BITSIZE (m_ref_mode);
HOST_WIDE_INT value = aarch64_fold_sve_cnt_pat (pattern, elements_per_vq);
if (value >= 0)
{
tree count = build_int_cstu (TREE_TYPE (f.lhs), value);
return gimple_build_assign (f.lhs, count);
}
return f.fold_to_cstu (value);
return NULL;
}

7
gcc/config/aarch64/aarch64-sve-builtins.cc
View file

@ -2615,6 +2615,13 @@ gimple_folder::redirect_call (const function_instance &instance)
return call;
}
/* Fold the call to constant VAL. */
gimple *
gimple_folder::fold_to_cstu (poly_uint64 val)
{
return gimple_build_assign (lhs, build_int_cstu (TREE_TYPE (lhs), val));
}
/* Fold the call to a PTRUE, taking the element size from type suffix 0. */
gimple *
gimple_folder::fold_to_ptrue ()

1
gcc/config/aarch64/aarch64-sve-builtins.h
View file

@ -500,6 +500,7 @@ public:
tree load_store_cookie (tree);
gimple *redirect_call (const function_instance &);
gimple *fold_to_cstu (poly_uint64);
gimple *fold_to_pfalse ();
gimple *fold_to_ptrue ();
gimple *fold_to_vl_pred (unsigned int);