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| author | Richard Sandiford <richard.sandiford@linaro.org> | 2017-11-01 09:41:48 +0000 |
|---|---|---|
| committer | Richard Sandiford <rsandifo@gcc.gnu.org> | 2017-11-01 09:41:48 +0000 |
| commit | 9b1de7e2e8e99eabf2b8d1ef74eb57fbd41bc730 (patch) | |
| tree | a1caf2e58025d69aaf22ee8231dc382401c0e68a /gcc/selftest.h | |
| parent | 59d06c050373919ed36a13b37103b6e069d8ebd3 (diff) | |
Add more vec_duplicate simplifications
This patch adds a vec_duplicate_p helper that tests for constant
or non-constant vector duplicates. Together with the existing
const_vec_duplicate_p, this complements the gen_vec_duplicate
and gen_const_vec_duplicate added by a previous patch.
The patch uses the new routines to add more rtx simplifications
involving vector duplicates. These mirror simplifications that
we already do for CONST_VECTOR broadcasts and are needed for
variable-length SVE, which uses:
(const:M (vec_duplicate:M X))
to represent constant broadcasts instead. The simplifications do
trigger on the testsuite for variable duplicates too, and in each
case I saw the change was an improvement.
The best way of testing the new simplifications seemed to be
via selftests. The patch cribs part of David's patch here:
https://gcc.gnu.org/ml/gcc-patches/2016-07/msg00270.html .
2017-11-01 Richard Sandiford <richard.sandiford@linaro.org>
David Malcolm <dmalcolm@redhat.com>
Alan Hayward <alan.hayward@arm.com>
David Sherwood <david.sherwood@arm.com>
gcc/
* rtl.h (vec_duplicate_p): New function.
* selftest-rtl.c (assert_rtx_eq_at): New function.
* selftest-rtl.h (ASSERT_RTX_EQ): New macro.
(assert_rtx_eq_at): Declare.
* selftest.h (selftest::simplify_rtx_c_tests): Declare.
* selftest-run-tests.c (selftest::run_tests): Call it.
* simplify-rtx.c: Include selftest.h and selftest-rtl.h.
(simplify_unary_operation_1): Recursively handle vector duplicates.
(simplify_binary_operation_1): Likewise. Handle VEC_SELECTs of
vector duplicates.
(simplify_subreg): Handle subregs of vector duplicates.
(make_test_reg, test_vector_ops_duplicate, test_vector_ops)
(selftest::simplify_rtx_c_tests): New functions.
Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Malcolm <dmalcolm@redhat.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r254294
Diffstat (limited to 'gcc/selftest.h')
| -rw-r--r-- | gcc/selftest.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/gcc/selftest.h b/gcc/selftest.h index 6478922cd2c..cdad939ce68 100644 --- a/gcc/selftest.h +++ b/gcc/selftest.h @@ -199,6 +199,7 @@ extern void unique_ptr_tests_cc_tests (); extern void vec_c_tests (); extern void wide_int_cc_tests (); extern void predict_c_tests (); +extern void simplify_rtx_c_tests (); extern int num_passes; |