Mesa (master): spirv: Add a MESA_SPIRV_FORCE_UNSTRUCTURED environment variable
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Fri Aug 14 20:55:37 UTC 2020
Module: Mesa
Branch: master
Commit: b41e74ae4a7c8f67c47149b4415f715f8a4d2597
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=b41e74ae4a7c8f67c47149b4415f715f8a4d2597
Author: Jason Ekstrand <jason at jlekstrand.net>
Date: Thu Aug 13 11:48:02 2020 -0500
spirv: Add a MESA_SPIRV_FORCE_UNSTRUCTURED environment variable
Reviewed-by: Karol Herbst <kherbst at redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/2401>
---
src/compiler/spirv/vtn_cfg.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/src/compiler/spirv/vtn_cfg.c b/src/compiler/spirv/vtn_cfg.c
index 9dc2a842da6..074f61b331e 100644
--- a/src/compiler/spirv/vtn_cfg.c
+++ b/src/compiler/spirv/vtn_cfg.c
@@ -1329,6 +1329,12 @@ void
vtn_function_emit(struct vtn_builder *b, struct vtn_function *func,
vtn_instruction_handler instruction_handler)
{
+ static int force_unstructured = -1;
+ if (force_unstructured < 0) {
+ force_unstructured =
+ env_var_as_boolean("MESA_SPIRV_FORCE_UNSTRUCTURED", false);
+ }
+
nir_builder_init(&b->nb, func->impl);
b->func = func;
b->nb.cursor = nir_after_cf_list(&func->impl->body);
@@ -1336,7 +1342,7 @@ vtn_function_emit(struct vtn_builder *b, struct vtn_function *func,
b->has_loop_continue = false;
b->phi_table = _mesa_pointer_hash_table_create(b);
- if (b->shader->info.stage == MESA_SHADER_KERNEL) {
+ if (b->shader->info.stage == MESA_SHADER_KERNEL || force_unstructured) {
b->func->impl->structured = false;
vtn_emit_cf_func_unstructured(b, func, instruction_handler);
} else {
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