| Message ID | CAFULd4Z-z43iRLQqokiUgrhZMAvV3Rf5eiWnsGRcUt=y9tT8Sw@mail.gmail.com |
|---|---|
| State | New |
| Headers | show |
| Series | tree-optimization/103948 - detect vector vec_cmp in expand_vector_condition | expand |
diff --git a/gcc/tree-vect-generic.c b/gcc/tree-vect-generic.c index 6afb6999cd7..5814a71a5bb 100644 --- a/gcc/tree-vect-generic.c +++ b/gcc/tree-vect-generic.c @@ -1052,7 +1052,9 @@ expand_vector_condition (gimple_stmt_iterator *gsi, bitmap dce_ssa_names) } } - if (expand_vec_cond_expr_p (type, TREE_TYPE (a1), code)) + if (expand_vec_cond_expr_p (type, TREE_TYPE (a1), code) + || (integer_all_onesp (b) && integer_zerop (c) + && expand_vec_cmp_expr_p (type, TREE_TYPE (a1), code))) { gcc_assert (TREE_CODE (a) == SSA_NAME || TREE_CODE (a) == VECTOR_CST); return true;
Currently, expand_vector_condition detects only vcondMN and vconduMN named RTX patterns. Teach it to also consider vec_cmpMN and vec_cmpuMN RTX patterns when all ones vector is returned for true and all zeros vector is returned for false. Patch by Richard, I tested it on the patched x86 target and wrote a ChangeLog entry. (No testcase, it will be added in a follow-up target-dependent patch). 2022-01-10 Richard Biener <rguenther@suse.de> gcc/ChangeLog: PR tree-optimization/103948 * tree-vect-generic.c (expand_vector_condition): Return true if all ones vector is returned for true, all zeros vector for false and the target defines corresponding vec_cmp{,u}MN named RTX pattern. Bootstrapped and regression tested on x86_64-linux-gnu {,-m32}. Pre-approved in the PR and pushed to master. Uros.