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| author | Richard Biener <rguenther@suse.de> | 2024-02-22 10:50:12 +0100 |
|---|---|---|
| committer | Richard Biener <rguenther@suse.de> | 2024-02-22 13:13:48 +0100 |
| commit | 549f251f055e3a0b0084189a3012c4f15d635e75 (patch) | |
| tree | e920c24546d657aa006b7cb03c5ba1dc9f96cabd /gcc/tree-vect-loop.cc | |
| parent | a0782531b8270f0fdb3f3e09b4ce544d5d1eef14 (diff) | |
| download | gcc-549f251f055e3a0b0084189a3012c4f15d635e75.zip gcc-549f251f055e3a0b0084189a3012c4f15d635e75.tar.gz gcc-549f251f055e3a0b0084189a3012c4f15d635e75.tar.bz2 | |
tree-optimization/114027 - conditional reduction chain
When we classify a conditional reduction chain as CONST_COND_REDUCTION
we fail to verify all involved conditionals have the same constant.
That's a quite unlikely situation so the following simply disables
such classification when there's more than one reduction statement.
PR tree-optimization/114027
* tree-vect-loop.cc (vecctorizable_reduction): Use optimized
condition reduction classification only for single-element
chains.
* gcc.dg/vect/pr114027.c: New testcase.
Diffstat (limited to 'gcc/tree-vect-loop.cc')
| -rw-r--r-- | gcc/tree-vect-loop.cc | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/gcc/tree-vect-loop.cc b/gcc/tree-vect-loop.cc index 5a5865c..35f1f8c 100644 --- a/gcc/tree-vect-loop.cc +++ b/gcc/tree-vect-loop.cc @@ -7759,17 +7759,18 @@ vectorizable_reduction (loop_vec_info loop_vinfo, < GET_MODE_SIZE (SCALAR_TYPE_MODE (TREE_TYPE (vectype_op[i])))))) vectype_in = vectype_op[i]; - if (op.code == COND_EXPR) + /* Record how the non-reduction-def value of COND_EXPR is defined. + ??? For a chain of multiple CONDs we'd have to match them up all. */ + if (op.code == COND_EXPR && reduc_chain_length == 1) { - /* Record how the non-reduction-def value of COND_EXPR is defined. */ if (dt == vect_constant_def) { cond_reduc_dt = dt; cond_reduc_val = op.ops[i]; } - if (dt == vect_induction_def - && def_stmt_info - && is_nonwrapping_integer_induction (def_stmt_info, loop)) + else if (dt == vect_induction_def + && def_stmt_info + && is_nonwrapping_integer_induction (def_stmt_info, loop)) { cond_reduc_dt = dt; cond_stmt_vinfo = def_stmt_info; |