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spirv: Use nir_builder for control flow

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Reviewed-by: Samuel Iglesias Gonsálvez <siglesias@igalia.com>
This commit is contained in:
Jason Ekstrand
2017-02-15 10:47:03 -08:00
parent 95972cd4fd
commit 86e749b1ad
1 changed files with 14 additions and 31 deletions
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45
src/compiler/spirv/vtn_cfg.c
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@@ -610,15 +610,10 @@ vtn_emit_cf_list(struct vtn_builder *b, struct list_head *cf_list,
case vtn_cf_node_type_if: {
struct vtn_if *vtn_if = (struct vtn_if *)node;
nir_if *if_stmt = nir_if_create(b->shader);
if_stmt->condition =
nir_src_for_ssa(vtn_ssa_value(b, vtn_if->condition)->def);
nir_cf_node_insert(b->nb.cursor, &if_stmt->cf_node);
bool sw_break = false;
b->nb.cursor = nir_after_cf_list(&if_stmt->then_list);
nir_if *nif =
nir_push_if(&b->nb, vtn_ssa_value(b, vtn_if->condition)->def);
if (vtn_if->then_type == vtn_branch_type_none) {
vtn_emit_cf_list(b, &vtn_if->then_body,
switch_fall_var, &sw_break, handler);
@@ -626,7 +621,7 @@ vtn_emit_cf_list(struct vtn_builder *b, struct list_head *cf_list,
vtn_emit_branch(b, vtn_if->then_type, switch_fall_var, &sw_break);
}
b->nb.cursor = nir_after_cf_list(&if_stmt->else_list);
nir_push_else(&b->nb, nif);
if (vtn_if->else_type == vtn_branch_type_none) {
vtn_emit_cf_list(b, &vtn_if->else_body,
switch_fall_var, &sw_break, handler);
@@ -634,7 +629,7 @@ vtn_emit_cf_list(struct vtn_builder *b, struct list_head *cf_list,
vtn_emit_branch(b, vtn_if->else_type, switch_fall_var, &sw_break);
}
b->nb.cursor = nir_after_cf_node(&if_stmt->cf_node);
nir_pop_if(&b->nb, nif);
/* If we encountered a switch break somewhere inside of the if,
* then it would have been handled correctly by calling
@@ -644,13 +639,7 @@ vtn_emit_cf_list(struct vtn_builder *b, struct list_head *cf_list,
*/
if (sw_break) {
*has_switch_break = true;
nir_if *switch_if = nir_if_create(b->shader);
switch_if->condition =
nir_src_for_ssa(nir_load_var(&b->nb, switch_fall_var));
nir_cf_node_insert(b->nb.cursor, &switch_if->cf_node);
b->nb.cursor = nir_after_cf_list(&if_stmt->then_list);
nir_push_if(&b->nb, nir_load_var(&b->nb, switch_fall_var));
}
break;
}
@@ -658,10 +647,7 @@ vtn_emit_cf_list(struct vtn_builder *b, struct list_head *cf_list,
case vtn_cf_node_type_loop: {
struct vtn_loop *vtn_loop = (struct vtn_loop *)node;
nir_loop *loop = nir_loop_create(b->shader);
nir_cf_node_insert(b->nb.cursor, &loop->cf_node);
b->nb.cursor = nir_after_cf_list(&loop->body);
nir_loop *loop = nir_push_loop(&b->nb);
vtn_emit_cf_list(b, &vtn_loop->body, NULL, NULL, handler);
if (!list_empty(&vtn_loop->cont_body)) {
@@ -676,20 +662,20 @@ vtn_emit_cf_list(struct vtn_builder *b, struct list_head *cf_list,
nir_store_var(&b->nb, do_cont, nir_imm_int(&b->nb, NIR_FALSE), 1);
b->nb.cursor = nir_before_cf_list(&loop->body);
nir_if *cont_if = nir_if_create(b->shader);
cont_if->condition = nir_src_for_ssa(nir_load_var(&b->nb, do_cont));
nir_cf_node_insert(b->nb.cursor, &cont_if->cf_node);
b->nb.cursor = nir_after_cf_list(&cont_if->then_list);
nir_if *cont_if =
nir_push_if(&b->nb, nir_load_var(&b->nb, do_cont));
vtn_emit_cf_list(b, &vtn_loop->cont_body, NULL, NULL, handler);
b->nb.cursor = nir_after_cf_node(&cont_if->cf_node);
nir_pop_if(&b->nb, cont_if);
nir_store_var(&b->nb, do_cont, nir_imm_int(&b->nb, NIR_TRUE), 1);
b->has_loop_continue = true;
}
b->nb.cursor = nir_after_cf_node(&loop->cf_node);
nir_pop_loop(&b->nb, loop);
break;
}
@@ -747,17 +733,14 @@ vtn_emit_cf_list(struct vtn_builder *b, struct list_head *cf_list,
/* Take fallthrough into account */
cond = nir_ior(&b->nb, cond, nir_load_var(&b->nb, fall_var));
nir_if *case_if = nir_if_create(b->nb.shader);
case_if->condition = nir_src_for_ssa(cond);
nir_cf_node_insert(b->nb.cursor, &case_if->cf_node);
nir_if *case_if = nir_push_if(&b->nb, cond);
bool has_break = false;
b->nb.cursor = nir_after_cf_list(&case_if->then_list);
nir_store_var(&b->nb, fall_var, nir_imm_int(&b->nb, NIR_TRUE), 1);
vtn_emit_cf_list(b, &cse->body, fall_var, &has_break, handler);
(void)has_break; /* We don't care */
b->nb.cursor = nir_after_cf_node(&case_if->cf_node);
nir_pop_if(&b->nb, case_if);
}
assert(i == num_cases);