--- /dev/null
+/*
+ * Copyright © 2014 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:
+ * Jason Ekstrand (jason@jlekstrand.net)
+ *
+ */
+
+#include "nir_worklist.h"
+
+void
+nir_block_worklist_init(nir_block_worklist *w, unsigned num_blocks,
+ void *mem_ctx)
+{
+ w->size = num_blocks;
+ w->count = 0;
+ w->start = 0;
+
+ w->blocks_present = rzalloc_array(mem_ctx, BITSET_WORD,
+ BITSET_WORDS(num_blocks));
+ w->blocks = ralloc_array(mem_ctx, nir_block *, num_blocks);
+}
+
+void
+nir_block_worklist_fini(nir_block_worklist *w)
+{
+ ralloc_free(w->blocks_present);
+ ralloc_free(w->blocks);
+}
+
+static bool
+worklist_add_block(nir_block *block, void *w)
+{
+ nir_block_worklist_push_tail(w, block);
+
+ return true;
+}
+
+void
+nir_block_worklist_add_all(nir_block_worklist *w, nir_function_impl *impl)
+{
+ nir_foreach_block(impl, worklist_add_block, w);
+}
+
+void
+nir_block_worklist_push_head(nir_block_worklist *w, nir_block *block)
+{
+ /* Pushing a block we already have is a no-op */
+ if (BITSET_TEST(w->blocks_present, block->index))
+ return;
+
+ assert(w->count < w->size);
+
+ if (w->start == 0)
+ w->start = w->size - 1;
+ else
+ w->start--;
+
+ w->count++;
+
+ w->blocks[w->start] = block;
+ BITSET_SET(w->blocks_present, block->index);
+}
+
+nir_block *
+nir_block_worklist_peek_head(nir_block_worklist *w)
+{
+ assert(w->count > 0);
+
+ return w->blocks[w->start];
+}
+
+nir_block *
+nir_block_worklist_pop_head(nir_block_worklist *w)
+{
+ assert(w->count > 0);
+
+ unsigned head = w->start;
+
+ w->start = (w->start + 1) % w->size;
+ w->count--;
+
+ BITSET_CLEAR(w->blocks_present, w->blocks[head]->index);
+ return w->blocks[head];
+}
+
+void
+nir_block_worklist_push_tail(nir_block_worklist *w, nir_block *block)
+{
+ /* Pushing a block we already have is a no-op */
+ if (BITSET_TEST(w->blocks_present, block->index))
+ return;
+
+ assert(w->count < w->size);
+
+ w->count++;
+
+ unsigned tail = w->start = (w->start + w->count - 1) % w->size;
+
+ w->blocks[tail] = block;
+ BITSET_SET(w->blocks_present, block->index);
+}
+
+nir_block *
+nir_block_worklist_peek_tail(nir_block_worklist *w)
+{
+ assert(w->count > 0);
+
+ unsigned tail = w->start = (w->start + w->count - 1) % w->size;
+
+ return w->blocks[tail];
+}
+
+nir_block *
+nir_block_worklist_pop_tail(nir_block_worklist *w)
+{
+ assert(w->count > 0);
+
+ unsigned tail = w->start = (w->start + w->count - 1) % w->size;
+
+ w->count--;
+
+ BITSET_CLEAR(w->blocks_present, w->blocks[tail]->index);
+ return w->blocks[tail];
+}
--- /dev/null
+/*
+ * Copyright © 2014 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:
+ * Jason Ekstrand (jason@jlekstrand.net)
+ *
+ */
+
+#pragma once
+
+#ifndef _NIR_WORKLIST_
+#define _NIR_WORKLIST_
+
+#include "nir.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** Represents a double-ended queue of unique blocks
+ *
+ * The worklist datastructure guarantees that eacy block is in the queue at
+ * most once. Pushing a block onto either end of the queue is a no-op if
+ * the block is already in the queue. In order for this to work, the
+ * caller must ensure that the blocks are properly indexed.
+ */
+typedef struct {
+ /* The total size of the worklist */
+ unsigned size;
+
+ /* The number of blocks currently in the worklist */
+ unsigned count;
+
+ /* The offset in the array of blocks at which the list starts */
+ unsigned start;
+
+ /* A bitset of all of the blocks currently present in the worklist */
+ BITSET_WORD *blocks_present;
+
+ /* The actual worklist */
+ nir_block **blocks;
+} nir_block_worklist;
+
+void nir_block_worklist_init(nir_block_worklist *w, unsigned num_blocks,
+ void *mem_ctx);
+void nir_block_worklist_fini(nir_block_worklist *w);
+
+void nir_block_worklist_add_all(nir_block_worklist *w, nir_function_impl *impl);
+
+static inline bool
+nir_block_worklist_is_empty(const nir_block_worklist *w)
+{
+ return w->count == 0;
+}
+
+void nir_block_worklist_push_head(nir_block_worklist *w, nir_block *block);
+
+nir_block *nir_block_worklist_peek_head(nir_block_worklist *w);
+
+nir_block *nir_block_worklist_pop_head(nir_block_worklist *w);
+
+void nir_block_worklist_push_tail(nir_block_worklist *w, nir_block *block);
+
+nir_block *nir_block_worklist_peek_tail(nir_block_worklist *w);
+
+nir_block *nir_block_worklist_pop_tail(nir_block_worklist *w);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /* _NIR_WORKLIST_ */
projects / mesa.git / commitdiff