poly_int: current_vector_size and TARGET_AUTOVECTORIZE_VECTOR_SIZES

This patch changes the type of current_vector_size to poly_uint64.
It also changes TARGET_AUTOVECTORIZE_VECTOR_SIZES so that it fills
in a vector of possible sizes (as poly_uint64s) instead of returning
a bitmask.  The documentation claimed that the hook didn't need to
include the default vector size (returned by preferred_simd_mode),
but that wasn't consistent with the omp-low.c usage.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
	    Alan Hayward  <alan.hayward@arm.com>
	    David Sherwood  <david.sherwood@arm.com>

gcc/
	* target.h (vector_sizes, auto_vector_sizes): New typedefs.
	* target.def (autovectorize_vector_sizes): Return the vector sizes
	by pointer, using vector_sizes rather than a bitmask.
	* targhooks.h (default_autovectorize_vector_sizes): Update accordingly.
	* targhooks.c (default_autovectorize_vector_sizes): Likewise.
	* config/aarch64/aarch64.c (aarch64_autovectorize_vector_sizes):
	Likewise.
	* config/arc/arc.c (arc_autovectorize_vector_sizes): Likewise.
	* config/arm/arm.c (arm_autovectorize_vector_sizes): Likewise.
	* config/i386/i386.c (ix86_autovectorize_vector_sizes): Likewise.
	* config/mips/mips.c (mips_autovectorize_vector_sizes): Likewise.
	* omp-general.c (omp_max_vf): Likewise.
	* omp-low.c (omp_clause_aligned_alignment): Likewise.
	* optabs-query.c (can_vec_mask_load_store_p): Likewise.
	* tree-vect-loop.c (vect_analyze_loop): Likewise.
	* tree-vect-slp.c (vect_slp_bb): Likewise.
	* doc/tm.texi: Regenerate.
	* tree-vectorizer.h (current_vector_size): Change from an unsigned int
	to a poly_uint64.
	* tree-vect-stmts.c (get_vectype_for_scalar_type_and_size): Take
	the vector size as a poly_uint64 rather than an unsigned int.
	(current_vector_size): Change from an unsigned int to a poly_uint64.
	(get_vectype_for_scalar_type): Update accordingly.
	* tree.h (build_truth_vector_type): Take the size and number of
	units as a poly_uint64 rather than an unsigned int.
	(build_vector_type): Add a temporary overload that takes
	the number of units as a poly_uint64 rather than an unsigned int.
	* tree.c (make_vector_type): Likewise.
	(build_truth_vector_type): Take the number of units as a poly_uint64
	rather than an unsigned int.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>

From-SVN: r256131

1 files changed, 10 insertions, 6 deletions

diff --git a/gcc/target.def b/gcc/target.def
index c024bb1be6f..dcebb7716d2 100644
--- a/gcc/target.def
+++ b/gcc/target.def
@@ -1894,12 +1894,16 @@ transformations even in absence of specialized @acronym{SIMD} hardware.",
    after processing the preferred one derived from preferred_simd_mode.  */
 DEFHOOK
 (autovectorize_vector_sizes,
- "This hook should return a mask of sizes that should be iterated over\n\
-after trying to autovectorize using the vector size derived from the\n\
-mode returned by @code{TARGET_VECTORIZE_PREFERRED_SIMD_MODE}.\n\
-The default is zero which means to not iterate over other vector sizes.",
- unsigned int,
- (void),
+ "If the mode returned by @code{TARGET_VECTORIZE_PREFERRED_SIMD_MODE} is not\n\
+the only one that is worth considering, this hook should add all suitable\n\
+vector sizes to @var{sizes}, in order of decreasing preference.  The first\n\
+one should be the size of @code{TARGET_VECTORIZE_PREFERRED_SIMD_MODE}.\n\
+\n\
+The hook does not need to do anything if the vector returned by\n\
+@code{TARGET_VECTORIZE_PREFERRED_SIMD_MODE} is the only one relevant\n\
+for autovectorization.  The default implementation does nothing.",
+ void,
+ (vector_sizes *sizes),
  default_autovectorize_vector_sizes)
 
 /* Function to get a target mode for a vector mask.  */