bb6c2b68d6
This patch uses SVE CLASTB to optimise conditional reductions. It means
that we no longer need to maintain a separate index vector to record
the most recent valid value, and no longer need to worry about overflow
cases.
2018-01-13 Richard Sandiford <richard.sandiford@linaro.org>
Alan Hayward <alan.hayward@arm.com>
David Sherwood <david.sherwood@arm.com>
gcc/
* doc/md.texi (fold_extract_last_@var{m}): Document.
* doc/sourcebuild.texi (vect_fold_extract_last): Likewise.
* optabs.def (fold_extract_last_optab): New optab.
* internal-fn.def (FOLD_EXTRACT_LAST): New internal function.
* internal-fn.c (fold_extract_direct): New macro.
(expand_fold_extract_optab_fn): Likewise.
(direct_fold_extract_optab_supported_p): Likewise.
* tree-vectorizer.h (EXTRACT_LAST_REDUCTION): New vect_reduction_type.
* tree-vect-loop.c (vect_model_reduction_cost): Handle
EXTRACT_LAST_REDUCTION.
(get_initial_def_for_reduction): Do not create an initial vector
for EXTRACT_LAST_REDUCTION reductions.
(vectorizable_reduction): Leave the scalar phi in place for
EXTRACT_LAST_REDUCTIONs. Try using EXTRACT_LAST_REDUCTION
ahead of INTEGER_INDUC_COND_REDUCTION. Do not check for an
epilogue code for EXTRACT_LAST_REDUCTION and defer the
transform phase to vectorizable_condition.
* tree-vect-stmts.c (vect_finish_stmt_generation_1): New function,
split out from...
(vect_finish_stmt_generation): ...here.
(vect_finish_replace_stmt): New function.
(vectorizable_condition): Handle EXTRACT_LAST_REDUCTION.
* config/aarch64/aarch64-sve.md (fold_extract_last_<mode>): New
pattern.
* config/aarch64/aarch64.md (UNSPEC_CLASTB): New unspec.
gcc/testsuite/
* lib/target-supports.exp
(check_effective_target_vect_fold_extract_last): New proc.
* gcc.dg/vect/pr65947-1.c: Update dump messages. Add markup
for fold_extract_last.
* gcc.dg/vect/pr65947-2.c: Likewise.
* gcc.dg/vect/pr65947-3.c: Likewise.
* gcc.dg/vect/pr65947-4.c: Likewise.
* gcc.dg/vect/pr65947-5.c: Likewise.
* gcc.dg/vect/pr65947-6.c: Likewise.
* gcc.dg/vect/pr65947-9.c: Likewise.
* gcc.dg/vect/pr65947-10.c: Likewise.
* gcc.dg/vect/pr65947-12.c: Likewise.
* gcc.dg/vect/pr65947-14.c: Likewise.
* gcc.dg/vect/pr80631-1.c: Likewise.
* gcc.target/aarch64/sve/clastb_1.c: New test.
* gcc.target/aarch64/sve/clastb_1_run.c: Likewise.
* gcc.target/aarch64/sve/clastb_2.c: Likewise.
* gcc.target/aarch64/sve/clastb_2_run.c: Likewise.
* gcc.target/aarch64/sve/clastb_3.c: Likewise.
* gcc.target/aarch64/sve/clastb_3_run.c: Likewise.
* gcc.target/aarch64/sve/clastb_4.c: Likewise.
* gcc.target/aarch64/sve/clastb_4_run.c: Likewise.
* gcc.target/aarch64/sve/clastb_5.c: Likewise.
* gcc.target/aarch64/sve/clastb_5_run.c: Likewise.
* gcc.target/aarch64/sve/clastb_6.c: Likewise.
* gcc.target/aarch64/sve/clastb_6_run.c: Likewise.
* gcc.target/aarch64/sve/clastb_7.c: Likewise.
* gcc.target/aarch64/sve/clastb_7_run.c: Likewise.
Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r256633
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| config | ||
| contrib | ||
| fixincludes | ||
| gcc | ||
| gnattools | ||
| gotools | ||
| include | ||
| INSTALL | ||
| intl | ||
| libada | ||
| libatomic | ||
| libbacktrace | ||
| libcc1 | ||
| libcpp | ||
| libdecnumber | ||
| libffi | ||
| libgcc | ||
| libgfortran | ||
| libgo | ||
| libgomp | ||
| libhsail-rt | ||
| libiberty | ||
| libitm | ||
| libmpx | ||
| libobjc | ||
| liboffloadmic | ||
| libquadmath | ||
| libsanitizer | ||
| libssp | ||
| libstdc++-v3 | ||
| libvtv | ||
| lto-plugin | ||
| maintainer-scripts | ||
| zlib | ||
| .dir-locals.el | ||
| .gitattributes | ||
| .gitignore | ||
| ABOUT-NLS | ||
| ChangeLog | ||
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| compile | ||
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| config.rpath | ||
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| configure | ||
| configure.ac | ||
| COPYING | ||
| COPYING3 | ||
| COPYING3.LIB | ||
| COPYING.LIB | ||
| COPYING.RUNTIME | ||
| depcomp | ||
| install-sh | ||
| libtool-ldflags | ||
| libtool.m4 | ||
| lt~obsolete.m4 | ||
| ltgcc.m4 | ||
| ltmain.sh | ||
| ltoptions.m4 | ||
| ltsugar.m4 | ||
| ltversion.m4 | ||
| MAINTAINERS | ||
| Makefile.def | ||
| Makefile.in | ||
| Makefile.tpl | ||
| missing | ||
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| README | ||
| symlink-tree | ||
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