diff options
Diffstat (limited to 'src/gallium/drivers/freedreno/ir3')
| -rw-r--r-- | src/gallium/drivers/freedreno/ir3/ir3_nir_lower_if_else.c | 51 |
1 files changed, 21 insertions, 30 deletions
diff --git a/src/gallium/drivers/freedreno/ir3/ir3_nir_lower_if_else.c b/src/gallium/drivers/freedreno/ir3/ir3_nir_lower_if_else.c index 12f7ccf7949..262f4907cab 100644 --- a/src/gallium/drivers/freedreno/ir3/ir3_nir_lower_if_else.c +++ b/src/gallium/drivers/freedreno/ir3/ir3_nir_lower_if_else.c @@ -58,12 +58,6 @@ * then we should prefer to not flatten the if/else.. */ -struct lower_state { - nir_builder b; - void *mem_ctx; - bool progress; -}; - static bool valid_dest(nir_block *block, nir_dest *dest) { @@ -213,23 +207,21 @@ flatten_block(nir_builder *bld, nir_block *if_block, nir_block *prev_block, } static bool -lower_if_else_block(nir_block *block, void *void_state) +lower_if_else_block(nir_block *block, nir_builder *b, void *mem_ctx) { - struct lower_state *state = void_state; - /* If the block is empty, then it certainly doesn't have any phi nodes, * so we can skip it. This also ensures that we do an early skip on the * end block of the function which isn't actually attached to the CFG. */ if (exec_list_is_empty(&block->instr_list)) - return true; + return false; if (nir_cf_node_is_first(&block->cf_node)) - return true; + return false; nir_cf_node *prev_node = nir_cf_node_prev(&block->cf_node); if (prev_node->type != nir_cf_node_if) - return true; + return false; nir_if *if_stmt = nir_cf_node_as_if(prev_node); nir_cf_node *then_node = nir_if_first_then_node(if_stmt); @@ -238,7 +230,7 @@ lower_if_else_block(nir_block *block, void *void_state) /* We can only have one block in each side ... */ if (nir_if_last_then_node(if_stmt) != then_node || nir_if_last_else_node(if_stmt) != else_node) - return true; + return false; nir_block *then_block = nir_cf_node_as_block(then_node); nir_block *else_block = nir_cf_node_as_block(else_node); @@ -246,11 +238,11 @@ lower_if_else_block(nir_block *block, void *void_state) /* ... and those blocks must only contain "allowed" instructions. */ if (!block_check_for_allowed_instrs(then_block) || !block_check_for_allowed_instrs(else_block)) - return true; + return false; /* condition should be ssa too, which simplifies flatten_block: */ if (!if_stmt->condition.is_ssa) - return true; + return false; /* At this point, we know that the previous CFG node is an if-then * statement containing only moves to phi nodes in this block. We can @@ -265,9 +257,9 @@ lower_if_else_block(nir_block *block, void *void_state) * block before. There are a few things that need handling specially * like discard/discard_if. */ - flatten_block(&state->b, then_block, prev_block, + flatten_block(b, then_block, prev_block, if_stmt->condition.ssa, false); - flatten_block(&state->b, else_block, prev_block, + flatten_block(b, else_block, prev_block, if_stmt->condition.ssa, true); nir_foreach_instr_safe(instr, block) { @@ -275,8 +267,8 @@ lower_if_else_block(nir_block *block, void *void_state) break; nir_phi_instr *phi = nir_instr_as_phi(instr); - nir_alu_instr *sel = nir_alu_instr_create(state->mem_ctx, nir_op_bcsel); - nir_src_copy(&sel->src[0].src, &if_stmt->condition, state->mem_ctx); + nir_alu_instr *sel = nir_alu_instr_create(mem_ctx, nir_op_bcsel); + nir_src_copy(&sel->src[0].src, &if_stmt->condition, mem_ctx); /* Splat the condition to all channels */ memset(sel->src[0].swizzle, 0, sizeof sel->src[0].swizzle); @@ -286,7 +278,7 @@ lower_if_else_block(nir_block *block, void *void_state) assert(src->src.is_ssa); unsigned idx = src->pred == then_block ? 1 : 2; - nir_src_copy(&sel->src[idx].src, &src->src, state->mem_ctx); + nir_src_copy(&sel->src[idx].src, &src->src, mem_ctx); } nir_ssa_dest_init(&sel->instr, &sel->dest.dest, @@ -301,26 +293,25 @@ lower_if_else_block(nir_block *block, void *void_state) } nir_cf_node_remove(&if_stmt->cf_node); - state->progress = true; - return true; } static bool lower_if_else_impl(nir_function_impl *impl) { - struct lower_state state; - - state.mem_ctx = ralloc_parent(impl); - state.progress = false; - nir_builder_init(&state.b, impl); + void *mem_ctx = ralloc_parent(impl); + nir_builder b; + nir_builder_init(&b, impl); - nir_foreach_block_call(impl, lower_if_else_block, &state); + bool progress = false; + nir_foreach_block(block, impl) { + progress |= lower_if_else_block(block, &b, mem_ctx); + } - if (state.progress) + if (progress) nir_metadata_preserve(impl, nir_metadata_none); - return state.progress; + return progress; } bool |