AlexIndustrial/mesa
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

i965/fs: Track liveness of the flag register.

Browse Source 
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Matt Turner
2014-10-28 19:53:53 -07:00
parent 13f6601585
commit bf8deb5514
2 changed files with 41 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/mesa/drivers/dri/i965/brw_fs_live_variables.cpp
+36
View File
@@ -157,6 +157,19 @@ 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) {
assert(inst->flag_subreg == 0);
if (!BITSET_TEST(bd->flag_def, 1)) {
BITSET_SET(bd->flag_use, 1);
}
}
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 +179,11 @@ 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 +217,13 @@ 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 +237,12 @@ 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 +314,11 @@ 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();
src/mesa/drivers/dri/i965/brw_fs_live_variables.h
+5
View File
@@ -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 {