From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 1666) id 2E15E385801D; Mon, 18 Oct 2021 10:57:51 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 2E15E385801D MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="utf-8" From: Richard Biener To: gcc-cvs@gcc.gnu.org Subject: [gcc r12-4472] tree-optimization/102788 - avoid spurious bool pattern fails X-Act-Checkin: gcc X-Git-Author: Richard Biener X-Git-Refname: refs/heads/master X-Git-Oldrev: 94dff03f67fad1f9c526bb915bb21a4deb19d638 X-Git-Newrev: eb032893675afea4b01cc6ad06a3e0dcfe9b51cd Message-Id: <20211018105751.2E15E385801D@sourceware.org> Date: Mon, 18 Oct 2021 10:57:51 +0000 (GMT) X-BeenThere: gcc-cvs@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-cvs mailing list List-Unsubscribe: , List-Archive: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 18 Oct 2021 10:57:51 -0000 https://gcc.gnu.org/g:eb032893675afea4b01cc6ad06a3e0dcfe9b51cd commit r12-4472-geb032893675afea4b01cc6ad06a3e0dcfe9b51cd Author: Richard Biener Date: Mon Oct 18 10:31:19 2021 +0200 tree-optimization/102788 - avoid spurious bool pattern fails Bool pattern recog is required for correctness since vectorized compares otherwise produce -1 for true so any context where bool is used as value and not as condition or mask needs to be replaced with CMP ? 1 : 0. When we fail to find a vector type for the result of such use we may not simply elide such transform since a new bool result can emerge when for example the cast_forwprop pattern is applied. So the following avoids failing of the bool pattern recog process and instead not assign a vector type for the stmt. 2021-10-18 Richard Biener PR tree-optimization/102788 * tree-vect-patterns.c (vect_init_pattern_stmt): Allow a NULL vectype. (vect_pattern_recog_1): Likewise. (vect_recog_bool_pattern): Continue matching the pattern even if we do not have a vector type for a conversion result. * g++.dg/vect/pr102788.cc: New testcase. Diff: --- gcc/testsuite/g++.dg/vect/pr102788.cc | 32 ++++++++++++++++++++++++++++++++ gcc/tree-vect-patterns.c | 8 +++----- 2 files changed, 35 insertions(+), 5 deletions(-) diff --git a/gcc/testsuite/g++.dg/vect/pr102788.cc b/gcc/testsuite/g++.dg/vect/pr102788.cc new file mode 100644 index 00000000000..fa9c366fe56 --- /dev/null +++ b/gcc/testsuite/g++.dg/vect/pr102788.cc @@ -0,0 +1,32 @@ +// { dg-do run } +// { dg-additional-options "-O3" } + +unsigned long long int var_4 = 235; +unsigned long long int var_5 = 74; +signed char var_12 = -99; +unsigned long long int var_349; +unsigned char var_645; +void test(); + +const unsigned long long &min(const unsigned long long &a, + const unsigned long long &b) +{ + return b < a ? b : a; +} + +void __attribute__((noipa)) test() +{ + for (short c = var_12; c; c += 5) + ; + for (int e = 0; e < 12; e += 1) { + var_349 = var_4 ? 235 : 74; + var_645 = min((unsigned long long)true, var_5 ? var_12 : var_4); + } +} + +int main() +{ + test(); + if (var_645 != 1) + __builtin_abort(); +} diff --git a/gcc/tree-vect-patterns.c b/gcc/tree-vect-patterns.c index e6c5bcdad36..854cbcff390 100644 --- a/gcc/tree-vect-patterns.c +++ b/gcc/tree-vect-patterns.c @@ -119,8 +119,9 @@ vect_init_pattern_stmt (vec_info *vinfo, gimple *pattern_stmt, = STMT_VINFO_DEF_TYPE (orig_stmt_info); if (!STMT_VINFO_VECTYPE (pattern_stmt_info)) { - gcc_assert (VECTOR_BOOLEAN_TYPE_P (vectype) - == vect_use_mask_type_p (orig_stmt_info)); + gcc_assert (!vectype + || (VECTOR_BOOLEAN_TYPE_P (vectype) + == vect_use_mask_type_p (orig_stmt_info))); STMT_VINFO_VECTYPE (pattern_stmt_info) = vectype; pattern_stmt_info->mask_precision = orig_stmt_info->mask_precision; } @@ -4283,8 +4284,6 @@ vect_recog_bool_pattern (vec_info *vinfo, || VECT_SCALAR_BOOLEAN_TYPE_P (TREE_TYPE (lhs))) return NULL; vectype = get_vectype_for_scalar_type (vinfo, TREE_TYPE (lhs)); - if (vectype == NULL_TREE) - return NULL; if (check_bool_pattern (var, vinfo, bool_stmts)) { @@ -5696,7 +5695,6 @@ vect_pattern_recog_1 (vec_info *vinfo, } loop_vinfo = dyn_cast (vinfo); - gcc_assert (pattern_vectype); /* Found a vectorizable pattern. */ if (dump_enabled_p ())