--- /dev/null
+/*
+ * Copyright © 2012 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ * Eric Anholt <eric@anholt.net>
+ *
+ */
+
+#include "brw_fs_cfg.h"
+
+/** @file brw_fs_cfg.cpp
+ *
+ * Walks the shader instructions generated and creates a set of basic
+ * blocks with successor/predecessor edges connecting them.
+ */
+
+static fs_bblock *
+pop_stack(exec_list *list)
+{
+ fs_bblock_link *link = (fs_bblock_link *)list->get_tail();
+ fs_bblock *block = link->block;
+ link->remove();
+
+ return block;
+}
+
+fs_bblock::fs_bblock()
+{
+ start = NULL;
+ end = NULL;
+
+ parents.make_empty();
+ children.make_empty();
+}
+
+void
+fs_bblock::add_successor(void *mem_ctx, fs_bblock *successor)
+{
+ successor->parents.push_tail(this->make_list(mem_ctx));
+ children.push_tail(successor->make_list(mem_ctx));
+}
+
+fs_bblock_link *
+fs_bblock::make_list(void *mem_ctx)
+{
+ return new(mem_ctx) fs_bblock_link(this);
+}
+
+fs_cfg::fs_cfg(fs_visitor *v)
+{
+ mem_ctx = ralloc_context(v->mem_ctx);
+ block_list.make_empty();
+ num_blocks = 0;
+ ip = 0;
+ cur = NULL;
+
+ fs_bblock *entry = new_block();
+ fs_bblock *cur_if = NULL, *cur_else = NULL, *cur_endif = NULL;
+ fs_bblock *cur_do = NULL, *cur_while = NULL;
+ exec_list if_stack, else_stack, endif_stack, do_stack, while_stack;
+ fs_bblock *next;
+
+ set_next_block(entry);
+
+ entry->start = (fs_inst *)v->instructions.get_head();
+
+ foreach_list(node, &v->instructions) {
+ fs_inst *inst = (fs_inst *)node;
+
+ cur->end = inst;
+
+ /* set_next_block wants the post-incremented ip */
+ ip++;
+
+ switch (inst->opcode) {
+ case BRW_OPCODE_IF:
+ /* Push our information onto a stack so we can recover from
+ * nested ifs.
+ */
+ if_stack.push_tail(cur_if->make_list(mem_ctx));
+ else_stack.push_tail(cur_else->make_list(mem_ctx));
+ endif_stack.push_tail(cur_endif->make_list(mem_ctx));
+
+ cur_if = cur;
+ cur_else = NULL;
+ /* Set up the block just after the endif. Don't know when exactly
+ * it will start, yet.
+ */
+ cur_endif = new_block();
+
+ /* Set up our immediately following block, full of "then"
+ * instructions.
+ */
+ next = new_block();
+ next->start = (fs_inst *)inst->next;
+ cur_if->add_successor(mem_ctx, next);
+
+ set_next_block(next);
+ break;
+
+ case BRW_OPCODE_ELSE:
+ cur->add_successor(mem_ctx, cur_endif);
+
+ next = new_block();
+ next->start = (fs_inst *)inst->next;
+ cur_if->add_successor(mem_ctx, next);
+ cur_else = next;
+
+ set_next_block(next);
+ break;
+
+ case BRW_OPCODE_ENDIF:
+ cur_endif->start = (fs_inst *)inst->next;
+ cur->add_successor(mem_ctx, cur_endif);
+ set_next_block(cur_endif);
+
+ if (!cur_else)
+ cur_if->add_successor(mem_ctx, cur_endif);
+
+ /* Pop the stack so we're in the previous if/else/endif */
+ cur_if = pop_stack(&if_stack);
+ cur_else = pop_stack(&else_stack);
+ cur_endif = pop_stack(&endif_stack);
+ break;
+
+ case BRW_OPCODE_DO:
+ /* Push our information onto a stack so we can recover from
+ * nested loops.
+ */
+ do_stack.push_tail(cur_do->make_list(mem_ctx));
+ while_stack.push_tail(cur_while->make_list(mem_ctx));
+
+ /* Set up the block just after the while. Don't know when exactly
+ * it will start, yet.
+ */
+ cur_while = new_block();
+
+ /* Set up our immediately following block, full of "then"
+ * instructions.
+ */
+ next = new_block();
+ next->start = (fs_inst *)inst->next;
+ cur->add_successor(mem_ctx, next);
+ cur_do = next;
+
+ set_next_block(next);
+ break;
+
+ case BRW_OPCODE_CONTINUE:
+ cur->add_successor(mem_ctx, cur_do);
+
+ next = new_block();
+ next->start = (fs_inst *)inst->next;
+ if (inst->predicated)
+ cur->add_successor(mem_ctx, next);
+
+ set_next_block(next);
+ break;
+
+ case BRW_OPCODE_BREAK:
+ cur->add_successor(mem_ctx, cur_while);
+
+ next = new_block();
+ next->start = (fs_inst *)inst->next;
+ if (inst->predicated)
+ cur->add_successor(mem_ctx, next);
+
+ set_next_block(next);
+ break;
+
+ case BRW_OPCODE_WHILE:
+ cur_while->start = (fs_inst *)inst->next;
+
+ cur->add_successor(mem_ctx, cur_do);
+ set_next_block(cur_while);
+
+ /* Pop the stack so we're in the previous loop */
+ cur_do = pop_stack(&do_stack);
+ cur_while = pop_stack(&while_stack);
+ break;
+
+ default:
+ break;
+ }
+ }
+
+ cur->end_ip = ip;
+
+ make_block_array();
+}
+
+fs_cfg::~fs_cfg()
+{
+ ralloc_free(mem_ctx);
+}
+
+fs_bblock *
+fs_cfg::new_block()
+{
+ fs_bblock *block = new(mem_ctx) fs_bblock();
+
+ return block;
+}
+
+void
+fs_cfg::set_next_block(fs_bblock *block)
+{
+ if (cur) {
+ assert(cur->end->next == block->start);
+ cur->end_ip = ip - 1;
+ }
+
+ block->start_ip = ip;
+ block->block_num = num_blocks++;
+ block_list.push_tail(block->make_list(mem_ctx));
+ cur = block;
+}
+
+void
+fs_cfg::make_block_array()
+{
+ blocks = ralloc_array(mem_ctx, fs_bblock *, num_blocks);
+
+ int i = 0;
+ foreach_list(block_node, &block_list) {
+ fs_bblock_link *link = (fs_bblock_link *)block_node;
+ blocks[i++] = link->block;
+ }
+ assert(i == num_blocks);
+}
--- /dev/null
+/*
+ * Copyright © 2012 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ * Eric Anholt <eric@anholt.net>
+ *
+ */
+
+#include "brw_fs.h"
+
+class fs_bblock_link : public exec_node {
+public:
+ fs_bblock_link(fs_bblock *block)
+ : block(block)
+ {
+ }
+
+ fs_bblock *block;
+};
+
+class fs_bblock {
+public:
+ static void* operator new(size_t size, void *ctx)
+ {
+ void *node;
+
+ node = rzalloc_size(ctx, size);
+ assert(node != NULL);
+
+ return node;
+ }
+
+ fs_bblock_link *make_list(void *mem_ctx);
+
+ fs_bblock();
+
+ void add_successor(void *mem_ctx, fs_bblock *successor);
+
+ fs_inst *start;
+ fs_inst *end;
+
+ int start_ip;
+ int end_ip;
+
+ exec_list parents;
+ exec_list children;
+ int block_num;
+};
+
+class fs_cfg {
+public:
+ static void* operator new(size_t size, void *ctx)
+ {
+ void *node;
+
+ node = rzalloc_size(ctx, size);
+ assert(node != NULL);
+
+ return node;
+ }
+
+ fs_cfg(fs_visitor *v);
+ ~fs_cfg();
+ fs_bblock *new_block();
+ void set_next_block(fs_bblock *block);
+ void make_block_array();
+
+ /** @{
+ *
+ * Used while generating the block list.
+ */
+ fs_bblock *cur;
+ int ip;
+ /** @} */
+
+ void *mem_ctx;
+
+ /** Ordered list (by ip) of basic blocks */
+ exec_list block_list;
+ fs_bblock **blocks;
+ int num_blocks;
+};
} /* extern "C" */
#include "brw_fs.h"
+#include "brw_fs_cfg.h"
#include "glsl/ir_print_visitor.h"
void
prog->Name, c->dispatch_width);
}
+ fs_cfg *cfg = NULL;
+ if (unlikely(INTEL_DEBUG & DEBUG_WM))
+ cfg = new(mem_ctx) fs_cfg(this);
+
foreach_list(node, &this->instructions) {
fs_inst *inst = (fs_inst *)node;
struct brw_reg src[3], dst;
if (unlikely(INTEL_DEBUG & DEBUG_WM)) {
+ foreach_list(node, &cfg->block_list) {
+ fs_bblock_link *link = (fs_bblock_link *)node;
+ fs_bblock *block = link->block;
+
+ if (block->start == inst) {
+ printf(" START B%d", block->block_num);
+ foreach_list(predecessor_node, &block->parents) {
+ fs_bblock_link *predecessor_link =
+ (fs_bblock_link *)predecessor_node;
+ fs_bblock *predecessor_block = predecessor_link->block;
+ printf(" <-B%d", predecessor_block->block_num);
+ }
+ printf("\n");
+ }
+ }
+
if (last_annotation_ir != inst->ir) {
last_annotation_ir = inst->ir;
if (last_annotation_ir) {
}
brw_disasm(stdout, &p->store[i], intel->gen);
}
+
+ foreach_list(node, &cfg->block_list) {
+ fs_bblock_link *link = (fs_bblock_link *)node;
+ fs_bblock *block = link->block;
+
+ if (block->end == inst) {
+ printf(" END B%d", block->block_num);
+ foreach_list(successor_node, &block->children) {
+ fs_bblock_link *successor_link =
+ (fs_bblock_link *)successor_node;
+ fs_bblock *successor_block = successor_link->block;
+ printf(" ->B%d", successor_block->block_num);
+ }
+ printf("\n");
+ }
+ }
}
last_native_inst = p->nr_insn;
projects / mesa.git / commitdiff