On Fri, Aug 27, 2021 at 8:53 AM liuhongt <hongtao....@intel.com> wrote:
>
> When gimple simplifcation try to combine op and vec_cond_expr to cond_op,
> it doesn't check if mask type matches. It causes an ICE when expand cond_op
> with mismatched mode.
> This patch add a function named cond_vectorized_internal_fn_supported_p
> to additionally check mask type than vectorized_internal_fn_supported_p.
>
> Bootstrapped and regtested on x86_64-linux-gnu{-m32,}.
> Ok for trunk?
>
> gcc/ChangeLog:
>
> PR middle-end/102080
> * internal-fn.c (cond_vectorized_internal_fn_supported_p): New
> functions.
> * internal-fn.h (cond_vectorized_internal_fn_supported_p): New
> declaration.
> * match.pd: Check the type of mask while generating cond_op in
> gimple simplication.
>
> gcc/testsuite/ChangeLog:
>
> PR middle-end/102080
> * gcc.target/i386/pr102080.c: New test.
> ---
> gcc/internal-fn.c | 22 ++++++++++++++++++++++
> gcc/internal-fn.h | 1 +
> gcc/match.pd | 24 ++++++++++++++++--------
> gcc/testsuite/gcc.target/i386/pr102080.c | 16 ++++++++++++++++
> 4 files changed, 55 insertions(+), 8 deletions(-)
> create mode 100644 gcc/testsuite/gcc.target/i386/pr102080.c
>
> diff --git a/gcc/internal-fn.c b/gcc/internal-fn.c
> index 1360a00f0b9..8b2b65db1a7 100644
> --- a/gcc/internal-fn.c
> +++ b/gcc/internal-fn.c
> @@ -4102,6 +4102,28 @@ expand_internal_call (gcall *stmt)
> expand_internal_call (gimple_call_internal_fn (stmt), stmt);
> }
>
> +/* Check cond_op for vector modes since vectorized_internal_fn_supported_p
> + doesn't check if mask type matches. */
> +bool
> +cond_vectorized_internal_fn_supported_p (internal_fn ifn, tree type,
> + tree mask_type)
> +{
> + if (!vectorized_internal_fn_supported_p (ifn, type))
> + return false;
> +
> + machine_mode mask_mode;
> + machine_mode vmode = TYPE_MODE (type);
> + int size1, size2;
> + if (VECTOR_MODE_P (vmode)
> + && targetm.vectorize.get_mask_mode (vmode).exists(&mask_mode)
> + && GET_MODE_SIZE (mask_mode).is_constant (&size1)
> + && GET_MODE_SIZE (TYPE_MODE (mask_type)).is_constant (&size2)
> + && size1 != size2)
Why do we check for equal size rather than just mode equality which
I think would work for non-constant sized modes as well? And when
using sizes you'd instead use maybe_ne (GET_MODE_SIZE (mask_mode),
GET_MODE_SIZE (TYPE_MODE (mask_type)))
Thanks,
Richard.
> + return false;
> +
> + return true;
> +}
> +
> /* If TYPE is a vector type, return true if IFN is a direct internal
> function that is supported for that type. If TYPE is a scalar type,
> return true if IFN is a direct internal function that is supported for
> diff --git a/gcc/internal-fn.h b/gcc/internal-fn.h
> index 19d0f849a5a..f0aea00103c 100644
> --- a/gcc/internal-fn.h
> +++ b/gcc/internal-fn.h
> @@ -236,5 +236,6 @@ extern void expand_PHI (internal_fn, gcall *);
> extern void expand_SHUFFLEVECTOR (internal_fn, gcall *);
>
> extern bool vectorized_internal_fn_supported_p (internal_fn, tree);
> +extern bool cond_vectorized_internal_fn_supported_p (internal_fn, tree,
> tree);
>
> #endif
> diff --git a/gcc/match.pd b/gcc/match.pd
> index e5bbb123a6a..72b1bc674db 100644
> --- a/gcc/match.pd
> +++ b/gcc/match.pd
> @@ -6987,14 +6987,18 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT)
> cond_op (COND_BINARY)
> (simplify
> (vec_cond @0 (view_convert? (uncond_op@4 @1 @2)) @3)
> - (with { tree op_type = TREE_TYPE (@4); }
> - (if (vectorized_internal_fn_supported_p (as_internal_fn (cond_op),
> op_type)
> + (with { tree op_type = TREE_TYPE (@4);
> + tree mask_type = TREE_TYPE (@0); }
> + (if (cond_vectorized_internal_fn_supported_p (as_internal_fn (cond_op),
> + op_type, mask_type)
> && element_precision (type) == element_precision (op_type))
> (view_convert (cond_op @0 @1 @2 (view_convert:op_type @3))))))
> (simplify
> (vec_cond @0 @1 (view_convert? (uncond_op@4 @2 @3)))
> - (with { tree op_type = TREE_TYPE (@4); }
> - (if (vectorized_internal_fn_supported_p (as_internal_fn (cond_op),
> op_type)
> + (with { tree op_type = TREE_TYPE (@4);
> + tree mask_type = TREE_TYPE (@0); }
> + (if (cond_vectorized_internal_fn_supported_p (as_internal_fn (cond_op),
> + op_type, mask_type)
> && element_precision (type) == element_precision (op_type))
> (view_convert (cond_op (bit_not @0) @2 @3 (view_convert:op_type @1)))))))
>
> @@ -7003,14 +7007,18 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT)
> cond_op (COND_TERNARY)
> (simplify
> (vec_cond @0 (view_convert? (uncond_op@5 @1 @2 @3)) @4)
> - (with { tree op_type = TREE_TYPE (@5); }
> - (if (vectorized_internal_fn_supported_p (as_internal_fn (cond_op),
> op_type)
> + (with { tree op_type = TREE_TYPE (@5);
> + tree mask_type = TREE_TYPE (@0); }
> + (if (cond_vectorized_internal_fn_supported_p (as_internal_fn (cond_op),
> + op_type, mask_type)
> && element_precision (type) == element_precision (op_type))
> (view_convert (cond_op @0 @1 @2 @3 (view_convert:op_type @4))))))
> (simplify
> (vec_cond @0 @1 (view_convert? (uncond_op@5 @2 @3 @4)))
> - (with { tree op_type = TREE_TYPE (@5); }
> - (if (vectorized_internal_fn_supported_p (as_internal_fn (cond_op),
> op_type)
> + (with { tree op_type = TREE_TYPE (@5);
> + tree mask_type = TREE_TYPE (@0); }
> + (if (cond_vectorized_internal_fn_supported_p (as_internal_fn (cond_op),
> + op_type, mask_type)
> && element_precision (type) == element_precision (op_type))
> (view_convert (cond_op (bit_not @0) @2 @3 @4
> (view_convert:op_type @1)))))))
> diff --git a/gcc/testsuite/gcc.target/i386/pr102080.c
> b/gcc/testsuite/gcc.target/i386/pr102080.c
> new file mode 100644
> index 00000000000..6a40a75e1c5
> --- /dev/null
> +++ b/gcc/testsuite/gcc.target/i386/pr102080.c
> @@ -0,0 +1,16 @@
> +#include<immintrin.h>
> +typedef float __m256 __attribute__((__vector_size__(32)));
> +__m256 _mm256_blendv_ps___Y, _mm256_blendv_ps___M, _mm256_mul_ps___A,
> + _mm256_mul_ps___B, IfThenElse___trans_tmp_9;
> +
> +void
> +__attribute__ ((target("avx")))
> +IfThenElse (__m256 no) {
> + IfThenElse___trans_tmp_9 = _mm256_blendv_ps (no, _mm256_blendv_ps___Y,
> _mm256_blendv_ps___M);
> +}
> +void
> +__attribute__ ((target("avx512vl")))
> +EncodedFromDisplay() {
> + __m256 __trans_tmp_11 = _mm256_mul_ps___A * _mm256_mul_ps___B;
> + IfThenElse(__trans_tmp_11);
> +}
> --
> 2.18.1
>
