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From a2f5e6f38fe7b5b32a252643b00dd2d7ab0e3fac Mon Sep 17 00:00:00 2001
From: Richard Sandiford <richard.sandiford@arm.com>
Date: Tue, 12 May 2020 09:01:10 +0100
Subject: [PATCH 19/35] [Backport] tree: Add vector_element_bits(_tree)
[PR94980 1/3]
Reference: https://gcc.gnu.org/git/gitweb.cgi?p=gcc.git;h=d17a896da1e898928d337596d029f0ece0039d55
A lot of code that wants to know the number of bits in a vector
element gets that information from the element's TYPE_SIZE,
which is always equal to TYPE_SIZE_UNIT * BITS_PER_UNIT.
This doesn't work for SVE and AVX512-style packed boolean vectors,
where several elements can occupy a single byte.
This patch introduces a new pair of helpers for getting the true
(possibly sub-byte) size. I made a token attempt to convert obvious
element size calculations, but I'm sure I missed some.
2020-05-12 Richard Sandiford <richard.sandiford@arm.com>
gcc/
PR tree-optimization/94980
* tree.h (vector_element_bits, vector_element_bits_tree): Declare.
* tree.c (vector_element_bits, vector_element_bits_tree): New.
* match.pd: Use the new functions instead of determining the
vector element size directly from TYPE_SIZE(_UNIT).
* tree-vect-data-refs.c (vect_gather_scatter_fn_p): Likewise.
* tree-vect-patterns.c (vect_recog_mask_conversion_pattern): Likewise.
* tree-vect-stmts.c (vect_is_simple_cond): Likewise.
* tree-vect-generic.c (expand_vector_piecewise): Likewise.
(expand_vector_conversion): Likewise.
(expand_vector_addition): Likewise for a TYPE_SIZE_UNIT used as
a divisor. Convert the dividend to bits to compensate.
* tree-vect-loop.c (vectorizable_live_operation): Call
vector_element_bits instead of open-coding it.
---
gcc/ChangeLog | 17 +++++++++++++++++
gcc/match.pd | 2 +-
gcc/tree-vect-data-refs.c | 2 +-
gcc/tree-vect-generic.c | 19 +++++++------------
gcc/tree-vect-loop.c | 4 +---
gcc/tree-vect-patterns.c | 3 +--
gcc/tree-vect-stmts.c | 3 +--
gcc/tree.c | 24 ++++++++++++++++++++++++
gcc/tree.h | 2 ++
9 files changed, 55 insertions(+), 21 deletions(-)
diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 3b1384e70..07aea9b86 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,20 @@
+2020-05-12 Richard Sandiford <richard.sandiford@arm.com>
+
+ PR tree-optimization/94980
+ * tree.h (vector_element_bits, vector_element_bits_tree): Declare.
+ * tree.c (vector_element_bits, vector_element_bits_tree): New.
+ * match.pd: Use the new functions instead of determining the
+ vector element size directly from TYPE_SIZE(_UNIT).
+ * tree-vect-data-refs.c (vect_gather_scatter_fn_p): Likewise.
+ * tree-vect-patterns.c (vect_recog_mask_conversion_pattern): Likewise.
+ * tree-vect-stmts.c (vect_is_simple_cond): Likewise.
+ * tree-vect-generic.c (expand_vector_piecewise): Likewise.
+ (expand_vector_conversion): Likewise.
+ (expand_vector_addition): Likewise for a TYPE_SIZE_UNIT used as
+ a divisor. Convert the dividend to bits to compensate.
+ * tree-vect-loop.c (vectorizable_live_operation): Call
+ vector_element_bits instead of open-coding it.
+
2021-04-08 Release Manager
* GCC 10.3.0 released.
diff --git a/gcc/match.pd b/gcc/match.pd
index 5899eea95..79a0228d2 100644
--- a/gcc/match.pd
+++ b/gcc/match.pd
@@ -6236,7 +6236,7 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT)
}
(if (ins)
(bit_insert { op0; } { ins; }
- { bitsize_int (at * tree_to_uhwi (TYPE_SIZE (TREE_TYPE (type)))); })
+ { bitsize_int (at * vector_element_bits (type)); })
(if (changed)
(vec_perm { op0; } { op1; } { op2; }))))))))))
diff --git a/gcc/tree-vect-data-refs.c b/gcc/tree-vect-data-refs.c
index d78b06455..e4466a4f3 100644
--- a/gcc/tree-vect-data-refs.c
+++ b/gcc/tree-vect-data-refs.c
@@ -3709,7 +3709,7 @@ vect_gather_scatter_fn_p (vec_info *vinfo, bool read_p, bool masked_p,
tree *offset_vectype_out)
{
unsigned int memory_bits = tree_to_uhwi (TYPE_SIZE (memory_type));
- unsigned int element_bits = tree_to_uhwi (TYPE_SIZE (TREE_TYPE (vectype)));
+ unsigned int element_bits = vector_element_bits (vectype);
if (element_bits != memory_bits)
/* For now the vector elements must be the same width as the
memory elements. */
diff --git a/gcc/tree-vect-generic.c b/gcc/tree-vect-generic.c
index c10492034..37c3956a4 100644
--- a/gcc/tree-vect-generic.c
+++ b/gcc/tree-vect-generic.c
@@ -276,8 +276,7 @@ expand_vector_piecewise (gimple_stmt_iterator *gsi, elem_op_func f,
tree part_width = TYPE_SIZE (inner_type);
tree index = bitsize_int (0);
int nunits = nunits_for_known_piecewise_op (type);
- int delta = tree_to_uhwi (part_width)
- / tree_to_uhwi (TYPE_SIZE (TREE_TYPE (type)));
+ int delta = tree_to_uhwi (part_width) / vector_element_bits (type);
int i;
location_t loc = gimple_location (gsi_stmt (*gsi));
@@ -357,8 +356,7 @@ expand_vector_addition (gimple_stmt_iterator *gsi,
elem_op_func f, elem_op_func f_parallel,
tree type, tree a, tree b, enum tree_code code)
{
- int parts_per_word = UNITS_PER_WORD
- / tree_to_uhwi (TYPE_SIZE_UNIT (TREE_TYPE (type)));
+ int parts_per_word = BITS_PER_WORD / vector_element_bits (type);
if (INTEGRAL_TYPE_P (TREE_TYPE (type))
&& parts_per_word >= 4
@@ -1733,19 +1731,17 @@ expand_vector_conversion (gimple_stmt_iterator *gsi)
optab optab1 = unknown_optab;
gcc_checking_assert (VECTOR_TYPE_P (ret_type) && VECTOR_TYPE_P (arg_type));
- gcc_checking_assert (tree_fits_uhwi_p (TYPE_SIZE (TREE_TYPE (ret_type))));
- gcc_checking_assert (tree_fits_uhwi_p (TYPE_SIZE (TREE_TYPE (arg_type))));
if (INTEGRAL_TYPE_P (TREE_TYPE (ret_type))
&& SCALAR_FLOAT_TYPE_P (TREE_TYPE (arg_type)))
code = FIX_TRUNC_EXPR;
else if (INTEGRAL_TYPE_P (TREE_TYPE (arg_type))
&& SCALAR_FLOAT_TYPE_P (TREE_TYPE (ret_type)))
code = FLOAT_EXPR;
- if (tree_to_uhwi (TYPE_SIZE (TREE_TYPE (ret_type)))
- < tree_to_uhwi (TYPE_SIZE (TREE_TYPE (arg_type))))
+ unsigned int ret_elt_bits = vector_element_bits (ret_type);
+ unsigned int arg_elt_bits = vector_element_bits (arg_type);
+ if (ret_elt_bits < arg_elt_bits)
modifier = NARROW;
- else if (tree_to_uhwi (TYPE_SIZE (TREE_TYPE (ret_type)))
- > tree_to_uhwi (TYPE_SIZE (TREE_TYPE (arg_type))))
+ else if (ret_elt_bits > arg_elt_bits)
modifier = WIDEN;
if (modifier == NONE && (code == FIX_TRUNC_EXPR || code == FLOAT_EXPR))
@@ -1908,8 +1904,7 @@ expand_vector_conversion (gimple_stmt_iterator *gsi)
tree part_width = TYPE_SIZE (compute_type);
tree index = bitsize_int (0);
int nunits = nunits_for_known_piecewise_op (arg_type);
- int delta = tree_to_uhwi (part_width)
- / tree_to_uhwi (TYPE_SIZE (TREE_TYPE (arg_type)));
+ int delta = tree_to_uhwi (part_width) / arg_elt_bits;
int i;
location_t loc = gimple_location (gsi_stmt (*gsi));
diff --git a/gcc/tree-vect-loop.c b/gcc/tree-vect-loop.c
index 899b56087..7990e31de 100644
--- a/gcc/tree-vect-loop.c
+++ b/gcc/tree-vect-loop.c
@@ -8059,9 +8059,7 @@ vectorizable_live_operation (stmt_vec_info stmt_info,
: gimple_get_lhs (stmt);
lhs_type = TREE_TYPE (lhs);
- bitsize = (VECTOR_BOOLEAN_TYPE_P (vectype)
- ? bitsize_int (TYPE_PRECISION (TREE_TYPE (vectype)))
- : TYPE_SIZE (TREE_TYPE (vectype)));
+ bitsize = vector_element_bits_tree (vectype);
vec_bitsize = TYPE_SIZE (vectype);
/* Get the vectorized lhs of STMT and the lane to use (counted in bits). */
diff --git a/gcc/tree-vect-patterns.c b/gcc/tree-vect-patterns.c
index 84d7ddb17..b076740ef 100644
--- a/gcc/tree-vect-patterns.c
+++ b/gcc/tree-vect-patterns.c
@@ -4406,8 +4406,7 @@ vect_recog_mask_conversion_pattern (stmt_vec_info stmt_vinfo, tree *type_out)
|| dt == vect_constant_def))
{
tree wide_scalar_type = build_nonstandard_integer_type
- (tree_to_uhwi (TYPE_SIZE (TREE_TYPE (vectype1))),
- TYPE_UNSIGNED (rhs1_type));
+ (vector_element_bits (vectype1), TYPE_UNSIGNED (rhs1_type));
tree vectype3 = get_vectype_for_scalar_type (vinfo,
wide_scalar_type);
if (expand_vec_cond_expr_p (vectype1, vectype3, TREE_CODE (rhs1)))
diff --git a/gcc/tree-vect-stmts.c b/gcc/tree-vect-stmts.c
index 4636b7ba2..0bdf9a547 100644
--- a/gcc/tree-vect-stmts.c
+++ b/gcc/tree-vect-stmts.c
@@ -10717,8 +10717,7 @@ vect_is_simple_cond (tree cond, vec_info *vinfo, slp_tree slp_node,
&& tree_int_cst_lt (TYPE_SIZE (scalar_type),
TYPE_SIZE (TREE_TYPE (vectype))))
scalar_type = build_nonstandard_integer_type
- (tree_to_uhwi (TYPE_SIZE (TREE_TYPE (vectype))),
- TYPE_UNSIGNED (scalar_type));
+ (vector_element_bits (vectype), TYPE_UNSIGNED (scalar_type));
*comp_vectype = get_vectype_for_scalar_type (vinfo, scalar_type,
slp_node);
}
diff --git a/gcc/tree.c b/gcc/tree.c
index 3e6647ae0..9a0cedf10 100644
--- a/gcc/tree.c
+++ b/gcc/tree.c
@@ -13892,6 +13892,30 @@ vector_type_mode (const_tree t)
return mode;
}
+/* Return the size in bits of each element of vector type TYPE. */
+
+unsigned int
+vector_element_bits (const_tree type)
+{
+ gcc_checking_assert (VECTOR_TYPE_P (type));
+ if (VECTOR_BOOLEAN_TYPE_P (type))
+ return vector_element_size (tree_to_poly_uint64 (TYPE_SIZE (type)),
+ TYPE_VECTOR_SUBPARTS (type));
+ return tree_to_uhwi (TYPE_SIZE (TREE_TYPE (type)));
+}
+
+/* Calculate the size in bits of each element of vector type TYPE
+ and return the result as a tree of type bitsizetype. */
+
+tree
+vector_element_bits_tree (const_tree type)
+{
+ gcc_checking_assert (VECTOR_TYPE_P (type));
+ if (VECTOR_BOOLEAN_TYPE_P (type))
+ return bitsize_int (vector_element_bits (type));
+ return TYPE_SIZE (TREE_TYPE (type));
+}
+
/* Verify that basic properties of T match TV and thus T can be a variant of
TV. TV should be the more specified variant (i.e. the main variant). */
diff --git a/gcc/tree.h b/gcc/tree.h
index bddc6e528..c66207fa0 100644
--- a/gcc/tree.h
+++ b/gcc/tree.h
@@ -1996,6 +1996,8 @@ class auto_suppress_location_wrappers
extern machine_mode element_mode (const_tree);
extern machine_mode vector_type_mode (const_tree);
+extern unsigned int vector_element_bits (const_tree);
+extern tree vector_element_bits_tree (const_tree);
/* The "canonical" type for this type node, which is used by frontends to
compare the type for equality with another type. If two types are
--
2.27.0.windows.1
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