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| author | Richard Sandiford <richard.sandiford@linaro.org> | 2017-11-09 15:18:32 +0000 |
|---|---|---|
| committer | Richard Sandiford <rsandifo@gcc.gnu.org> | 2017-11-09 15:18:32 +0000 |
| commit | 32c7bafd50e6553f2f79858cf365907979d5eb2a (patch) | |
| tree | 0d3d1842c080a9bdb1106625b1d8df762c606ccf /gcc/doc | |
| parent | b8353767564e8042ce75d6879e813ce313a0a050 (diff) | |
| download | gcc-32c7bafd50e6553f2f79858cf365907979d5eb2a.zip gcc-32c7bafd50e6553f2f79858cf365907979d5eb2a.tar.gz gcc-32c7bafd50e6553f2f79858cf365907979d5eb2a.tar.bz2 | |
Add a vect_variable_length target selector
This patch adds a target selector for variable-length vectors.
Initially it's always false, but the SVE patch provides a case
in which it's true.
2017-11-09 Richard Sandiford <richard.sandiford@linaro.org>
Alan Hayward <alan.hayward@arm.com>
David Sherwood <david.sherwood@arm.com>
gcc/
* doc/sourcebuild.texi (vect_variable_length): Document.
gcc/testsuite/
* lib/target-supports.exp
(check_effective_target_vect_variable_length): New proc.
* gcc.dg/vect/pr60482.c: XFAIL test for no epilog loop if
vect_variable_length.
* gcc.dg/vect/slp-reduc-6.c: XFAIL two-operation SLP if
vect_variable_length.
* gcc.dg/vect/vect-alias-check-5.c: XFAIL alias optimization if
vect_variable_length.
* gfortran.dg/vect/fast-math-mgrid-resid.f: XFAIL predictive
commoning optimization if vect_variable_length.
Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r254595
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/sourcebuild.texi | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/gcc/doc/sourcebuild.texi b/gcc/doc/sourcebuild.texi index cdee050..25e1103 100644 --- a/gcc/doc/sourcebuild.texi +++ b/gcc/doc/sourcebuild.texi @@ -1486,6 +1486,9 @@ Target prefers vectors to have an alignment greater than element alignment, but also allows unaligned vector accesses in some circumstances. +@item vect_variable_length +Target has variable-length vectors. + @item vect_widen_sum_hi_to_si Target supports a vector widening summation of @code{short} operands into @code{int} results, or can promote (unpack) from @code{short} |