diff options
| author | Timothy Arceri <[email protected]> | 2018-11-20 13:45:58 +1100 |
|---|---|---|
| committer | Timothy Arceri <[email protected]> | 2019-03-12 00:52:30 +0000 |
| commit | 68ce0ec22244726c1b61d91936a6b79ac20ab77a (patch) | |
| tree | 4916d51a4433d6743c5ddeb5931fcd1a1bc1d214 /src/compiler/nir/nir_opt_loop_unroll.c | |
| parent | e8a8937a04fd9531069616c63c099ba276296112 (diff) | |
nir: calculate trip count for more loops
This adds support to loop analysis for loops where the induction
variable is compared to the result of min(variable, constant).
For example:
for (int i = 0; i < imin(x, 4); i++)
...
We add a new bool to the loop terminator struct in order to
differentiate terminators with this exit condition.
Reviewed-by: Ian Romanick <[email protected]>
Diffstat (limited to 'src/compiler/nir/nir_opt_loop_unroll.c')
| -rw-r--r-- | src/compiler/nir/nir_opt_loop_unroll.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/src/compiler/nir/nir_opt_loop_unroll.c b/src/compiler/nir/nir_opt_loop_unroll.c index c700e6704da..a5a5ca3deee 100644 --- a/src/compiler/nir/nir_opt_loop_unroll.c +++ b/src/compiler/nir/nir_opt_loop_unroll.c @@ -827,7 +827,8 @@ process_loops(nir_shader *sh, nir_cf_node *cf_node, bool *has_nested_loop_out) } else { /* Attempt to unroll loops with two terminators. */ unsigned num_lt = list_length(&loop->info->loop_terminator_list); - if (num_lt == 2) { + if (num_lt == 2 && + !loop->info->limiting_terminator->exact_trip_count_unknown) { bool limiting_term_second = true; nir_loop_terminator *terminator = list_first_entry(&loop->info->loop_terminator_list, |