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-rw-r--r--src/mesa/drivers/dri/i965/brw_fs_copy_propagation.cpp11
1 files changed, 6 insertions, 5 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_fs_copy_propagation.cpp b/src/mesa/drivers/dri/i965/brw_fs_copy_propagation.cpp
index 144a43f85ac..634eb3d0a79 100644
--- a/src/mesa/drivers/dri/i965/brw_fs_copy_propagation.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_copy_propagation.cpp
@@ -73,7 +73,7 @@ public:
fs_copy_prop_dataflow(void *mem_ctx, cfg_t *cfg,
exec_list *out_acp[ACP_HASH_SIZE]);
- void setup_kills();
+ void setup_initial_values();
void run();
void *mem_ctx;
@@ -125,16 +125,16 @@ fs_copy_prop_dataflow::fs_copy_prop_dataflow(void *mem_ctx, cfg_t *cfg,
assert(next_acp == num_acp);
- setup_kills();
+ setup_initial_values();
run();
}
/**
- * Walk the set of instructions in the block, marking which entries in the acp
- * are killed by the block.
+ * Set up initial values for each of the data flow sets, prior to running
+ * the fixed-point algorithm.
*/
void
-fs_copy_prop_dataflow::setup_kills()
+fs_copy_prop_dataflow::setup_initial_values()
{
for (int b = 0; b < cfg->num_blocks; b++) {
bblock_t *block = cfg->blocks[b];
@@ -145,6 +145,7 @@ fs_copy_prop_dataflow::setup_kills()
if (inst->dst.file != GRF)
continue;
+ /* Mark ACP entries which are killed by this instruction. */
for (int i = 0; i < num_acp; i++) {
if (inst->overwrites_reg(acp[i]->dst) ||
inst->overwrites_reg(acp[i]->src)) {