diff options
Diffstat (limited to 'gcc/tree-vect-patterns.cc')
| -rw-r--r-- | gcc/tree-vect-patterns.cc | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/gcc/tree-vect-patterns.cc b/gcc/tree-vect-patterns.cc index 555986b..af64cb8 100644 --- a/gcc/tree-vect-patterns.cc +++ b/gcc/tree-vect-patterns.cc @@ -1914,6 +1914,9 @@ vect_recog_ctz_ffs_pattern (vec_info *vinfo, stmt_vec_info stmt_vinfo, && val_new == prec) || (ifnnew == IFN_POPCOUNT && ifn == IFN_CTZ)) { + if (vect_is_reduction (stmt_vinfo)) + return NULL; + /* .CTZ (X) = PREC - .CLZ ((X - 1) & ~X) .CTZ (X) = .POPCOUNT ((X - 1) & ~X). */ if (ifnnew == IFN_CLZ) @@ -1952,6 +1955,9 @@ vect_recog_ctz_ffs_pattern (vec_info *vinfo, stmt_vec_info stmt_vinfo, } else if (ifnnew == IFN_CLZ) { + if (vect_is_reduction (stmt_vinfo)) + return NULL; + /* .CTZ (X) = (PREC - 1) - .CLZ (X & -X) .FFS (X) = PREC - .CLZ (X & -X). */ sub = prec - (ifn == IFN_CTZ); @@ -1971,6 +1977,9 @@ vect_recog_ctz_ffs_pattern (vec_info *vinfo, stmt_vec_info stmt_vinfo, } else if (ifnnew == IFN_POPCOUNT) { + if (vect_is_reduction (stmt_vinfo)) + return NULL; + /* .CTZ (X) = PREC - .POPCOUNT (X | -X) .FFS (X) = (PREC + 1) - .POPCOUNT (X | -X). */ sub = prec + (ifn == IFN_FFS); @@ -1993,6 +2002,11 @@ vect_recog_ctz_ffs_pattern (vec_info *vinfo, stmt_vec_info stmt_vinfo, /* .FFS (X) = .CTZ (X) + 1. */ add = 1; val_cmp++; + + if (vect_is_reduction (stmt_vinfo) + && defined_at_zero + && (!defined_at_zero_new || val != val_cmp)) + return NULL; } /* Create B = .IFNNEW (A). */ |