---
.../drivers/dri/i965/brw_fs_live_variables.cpp | 35 ++++++++++++++++++++++
src/mesa/drivers/dri/i965/brw_fs_live_variables.h | 5 ++++
2 files changed, 40 insertions(+)
diff --git a/src/mesa/drivers/dri/i965/brw_fs_live_variables.cpp
b/src/mesa/drivers/dri/i965/brw_fs_live_variables.cpp
index ab81e94..dbe1d34 100644
--- a/src/mesa/drivers/dri/i965/brw_fs_live_variables.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_live_variables.cpp
@@ -157,6 +157,18 @@ fs_live_variables::setup_def_use()
reg.reg_offset++;
}
}
+ if (inst->reads_flag()) {
+ /* The vertical combination predicates read f0.0 and f0.1. */
+ if (inst->predicate == BRW_PREDICATE_ALIGN1_ANYV ||
+ inst->predicate == BRW_PREDICATE_ALIGN1_ALLV) {
+ if (!BITSET_TEST(bd->flag_def, 1 - inst->flag_subreg)) {
+ BITSET_SET(bd->flag_use, 1 - inst->flag_subreg);
+ }
+ }
+ if (!BITSET_TEST(bd->flag_def, inst->flag_subreg)) {
+ BITSET_SET(bd->flag_use, inst->flag_subreg);
+ }
+ }
/* Set def[] for this instruction */
if (inst->dst.file == GRF) {
@@ -166,6 +178,11 @@ fs_live_variables::setup_def_use()
reg.reg_offset++;
}
}
+ if (inst->writes_flag()) {
+ if (!BITSET_TEST(bd->flag_use, inst->flag_subreg)) {
+ BITSET_SET(bd->flag_def, inst->flag_subreg);
+ }
+ }
ip++;
}
@@ -199,6 +216,13 @@ fs_live_variables::compute_live_variables()
cont = true;
}
}
+ BITSET_WORD new_livein = (bd->flag_use[0] |
+ (bd->flag_liveout[0] &
+ ~bd->flag_def[0]));
+ if (new_livein & ~bd->flag_livein[0]) {
+ bd->flag_livein[0] |= new_livein;
+ cont = true;
+ }
/* Update liveout */
foreach_list_typed(bblock_link, child_link, link, &block->children) {
@@ -212,6 +236,12 @@ fs_live_variables::compute_live_variables()
cont = true;
}
}
+ BITSET_WORD new_liveout = (child_bd->flag_livein[0] &
+ ~bd->flag_liveout[0]);
+ if (new_liveout) {
+ bd->flag_liveout[0] |= new_liveout;
+ cont = true;
+ }
}
}
}
@@ -283,6 +313,11 @@ fs_live_variables::fs_live_variables(fs_visitor *v, const
cfg_t *cfg)
block_data[i].use = rzalloc_array(mem_ctx, BITSET_WORD, bitset_words);
block_data[i].livein = rzalloc_array(mem_ctx, BITSET_WORD, bitset_words);
block_data[i].liveout = rzalloc_array(mem_ctx, BITSET_WORD,
bitset_words);
+
+ block_data[i].flag_def[0] = 0;
+ block_data[i].flag_use[0] = 0;
+ block_data[i].flag_livein[0] = 0;
+ block_data[i].flag_liveout[0] = 0;
}
setup_def_use();
diff --git a/src/mesa/drivers/dri/i965/brw_fs_live_variables.h
b/src/mesa/drivers/dri/i965/brw_fs_live_variables.h
index 5d63901..2bfb583 100644
--- a/src/mesa/drivers/dri/i965/brw_fs_live_variables.h
+++ b/src/mesa/drivers/dri/i965/brw_fs_live_variables.h
@@ -51,6 +51,11 @@ struct block_data {
/** Which defs reach the exit point of the block. */
BITSET_WORD *liveout;
+
+ BITSET_WORD flag_def[1];
+ BITSET_WORD flag_use[1];
+ BITSET_WORD flag_livein[1];
+ BITSET_WORD flag_liveout[1];
};
class fs_live_variables {
--
2.0.4
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