https://gcc.gnu.org/g:f6eb8291e1c538f946efcb79b1f597c251be63c4
commit r16-2133-gf6eb8291e1c538f946efcb79b1f597c251be63c4
Author: Icen Zeyada <icen.zeya...@arm.com>
Date: Wed Jul 9 12:57:11 2025 +0100
tree-simplify: unify simple_comparison ops in vec_cond for bit and/or/xor
[PR119196]
Merge simple_comparison patterns under a single vec_cond_expr for bit_and,
bit_ior, and bit_xor in the simplify pass.
Ensure that when both operands of a bit_and, bit_or, or bit_xor are
simple_comparison
results, they reside within the same vec_cond_expr rather than separate
ones.
This prepares the AST so that subsequent transformations (e.g., folding the
comparisons if possible) can take effect.
gcc/ChangeLog:
PR tree-optimization/119196
* match.pd: Merge multiple vec_cond_expr in a single one for
bit_and, bit_ior and bit_xor.
Signed-off-by: Icen Zeyada <icen.zeya...@arm.com>
Diff:
---
gcc/match.pd | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/gcc/match.pd b/gcc/match.pd
index ec2f5603d9c0..99d218ea048a 100644
--- a/gcc/match.pd
+++ b/gcc/match.pd
@@ -5981,6 +5981,15 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT)
&& !expand_vec_cond_expr_p (TREE_TYPE (@1), TREE_TYPE (@0)))))
(vec_cond @0 (op! @1 @3) (op! @2 @4))))
+/* (@0 ? @2 : @3) lop (@1 ? @2 : @3) --> (@0 lop @1) ? @2 : @3. */
+(for lop (bit_and bit_ior bit_xor)
+ (simplify
+ (lop
+ (vec_cond @0 integer_minus_onep@2 integer_zerop@3)
+ (vec_cond @1 @2 @3))
+ (if (target_supports_op_p (TREE_TYPE (@0), lop, optab_vector))
+ (vec_cond (lop @0 @1) @2 @3))))
+
/* (c ? a : b) op d --> c ? (a op d) : (b op d) */
(simplify
(op (vec_cond:s @0 @1 @2) @3)
