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| author | Richard Sandiford <richard.sandiford@arm.com> | 2019-11-18 15:36:10 +0000 |
|---|---|---|
| committer | Richard Sandiford <rsandifo@gcc.gnu.org> | 2019-11-18 15:36:10 +0000 |
| commit | 58c036c8354e4d14551ceaeffaa1dda2fe445640 (patch) | |
| tree | c4f41c8fbb38f8a7e7be198e099f370ebd20789b /gcc/testsuite/lib/target-supports.exp | |
| parent | 78930e4b4867c0558cf347778591a67a0b235ca0 (diff) | |
Add optabs for accelerating RAW and WAR alias checks
This patch adds optabs that check whether a read followed by a write
or a write followed by a read can be divided into interleaved byte
accesses without changing the dependencies between the bytes.
This is one of the uses of the SVE2 WHILERW and WHILEWR instructions.
(The instructions can also be used to limit the VF at runtime,
but that's future work.)
2019-11-18 Richard Sandiford <richard.sandiford@arm.com>
gcc/
* doc/sourcebuild.texi (vect_check_ptrs): Document.
* optabs.def (check_raw_ptrs_optab, check_war_ptrs_optab): New optabs.
* doc/md.texi: Document them.
* internal-fn.def (IFN_CHECK_RAW_PTRS, IFN_CHECK_WAR_PTRS): New
internal functions.
* internal-fn.h (internal_check_ptrs_fn_supported_p): Declare.
* internal-fn.c (check_ptrs_direct): New macro.
(expand_check_ptrs_optab_fn): Likewise.
(direct_check_ptrs_optab_supported_p): Likewise.
(internal_check_ptrs_fn_supported_p): New fuction.
* tree-data-ref.c: Include internal-fn.h.
(create_ifn_alias_checks): New function.
(create_intersect_range_checks): Use it.
* config/aarch64/iterators.md (SVE2_WHILE_PTR): New int iterator.
(optab, cmp_op): Handle it.
(raw_war, unspec): New int attributes.
* config/aarch64/aarch64.md (UNSPEC_WHILERW, UNSPEC_WHILE_WR): New
constants.
* config/aarch64/predicates.md (aarch64_bytes_per_sve_vector_operand):
New predicate.
* config/aarch64/aarch64-sve2.md (check_<raw_war>_ptrs<mode>): New
expander.
(@aarch64_sve2_while<cmp_op><GPI:mode><PRED_ALL:mode>_ptest): New
pattern.
gcc/testsuite/
* lib/target-supports.exp (check_effective_target_vect_check_ptrs):
New procedure.
* gcc.dg/vect/vect-alias-check-14.c: Expect IFN_CHECK_WAR to be
used, if available.
* gcc.dg/vect/vect-alias-check-15.c: Likewise.
* gcc.dg/vect/vect-alias-check-16.c: Likewise IFN_CHECK_RAW.
* gcc.target/aarch64/sve2/whilerw_1.c: New test.
* gcc.target/aarch64/sve2/whilewr_1.c: Likewise.
* gcc.target/aarch64/sve2/whilewr_2.c: Likewise.
From-SVN: r278414
Diffstat (limited to 'gcc/testsuite/lib/target-supports.exp')
| -rw-r--r-- | gcc/testsuite/lib/target-supports.exp | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/gcc/testsuite/lib/target-supports.exp b/gcc/testsuite/lib/target-supports.exp index 54b2fcab389..08af9f85b4e 100644 --- a/gcc/testsuite/lib/target-supports.exp +++ b/gcc/testsuite/lib/target-supports.exp @@ -6459,6 +6459,13 @@ proc check_effective_target_vect_natural_alignment { } { return $et_vect_natural_alignment } +# Return true if the target supports the check_raw_ptrs and check_war_ptrs +# optabs on vectors. + +proc check_effective_target_vect_check_ptrs { } { + return [check_effective_target_aarch64_sve2] +} + # Return true if fully-masked loops are supported. proc check_effective_target_vect_fully_masked { } { |