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| author | Robin Dapp <rdapp@ventanamicro.com> | 2023-11-10 08:56:18 +0100 |
|---|---|---|
| committer | Robin Dapp <rdapp@ventanamicro.com> | 2023-11-10 14:43:21 +0100 |
| commit | d7b971cf61ae0091dbc777c9aa056e6f1293da2f (patch) | |
| tree | 1be03b87b206e4e9185bebef71ed0b7a61f4ce23 | |
| parent | b70ad8c19aa8be672cdba6afe9cbab2d1254d127 (diff) | |
| download | gcc-d7b971cf61ae0091dbc777c9aa056e6f1293da2f.zip gcc-d7b971cf61ae0091dbc777c9aa056e6f1293da2f.tar.gz gcc-d7b971cf61ae0091dbc777c9aa056e6f1293da2f.tar.bz2 | |
vect: Look through pattern stmt in fold_left_reduction.
It appears as if we "look through" a statement pattern in
vect_finish_replace_stmt but not before when we replace the newly
created vector statement's lhs. Then the lhs is the statement pattern's
lhs while in vect_finish_replace_stmt we assert that it's from the
statement the pattern replaced.
This patch uses vect_orig_stmt on the scalar destination's definition so
the replaced statement is used everywhere.
gcc/ChangeLog:
PR tree-optimization/112464
* tree-vect-loop.cc (vectorize_fold_left_reduction): Use
vect_orig_stmt on scalar_dest_def_info.
gcc/testsuite/ChangeLog:
* gcc.target/i386/pr112464.c: New test.
| -rw-r--r-- | gcc/testsuite/gcc.target/i386/pr112464.c | 10 | ||||
| -rw-r--r-- | gcc/tree-vect-loop.cc | 2 |
2 files changed, 11 insertions, 1 deletions
diff --git a/gcc/testsuite/gcc.target/i386/pr112464.c b/gcc/testsuite/gcc.target/i386/pr112464.c new file mode 100644 index 0000000..2290c71 --- /dev/null +++ b/gcc/testsuite/gcc.target/i386/pr112464.c @@ -0,0 +1,10 @@ +/* { dg-do compile } */ +/* { dg-options "-Ofast -mavx512dq -ftrapv" } */ + +long *e; +int n, i, err; +void fn() { + for (; i < n; i++) + if (e[i]) + err++; +} diff --git a/gcc/tree-vect-loop.cc b/gcc/tree-vect-loop.cc index 8abc193..f61adad 100644 --- a/gcc/tree-vect-loop.cc +++ b/gcc/tree-vect-loop.cc @@ -7087,7 +7087,7 @@ vectorize_fold_left_reduction (loop_vec_info loop_vinfo, opmask, &vec_opmask); } - gimple *sdef = scalar_dest_def_info->stmt; + gimple *sdef = vect_orig_stmt (scalar_dest_def_info)->stmt; tree scalar_dest = gimple_get_lhs (sdef); tree scalar_type = TREE_TYPE (scalar_dest); tree reduc_var = gimple_phi_result (reduc_def_stmt); |