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

i965/fs: Remove opt_drop_redundant_mov_to_flags().

Browse Source 
Dead code elimination now handles this.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Matt Turner
2014-11-03 11:24:03 -08:00
parent b37273b924
commit b449366587
2 changed files with 0 additions and 32 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/mesa/drivers/dri/i965/brw_fs.cpp
-31
View File
@@ -3419,35 +3419,6 @@ fs_visitor::calculate_register_pressure()
}
}
/**
* Look for repeated FS_OPCODE_MOV_DISPATCH_TO_FLAGS and drop the later ones.
*
* The needs_unlit_centroid_workaround ends up producing one of these per
* channel of centroid input, so it's good to clean them up.
*
* An assumption here is that nothing ever modifies the dispatched pixels
* value that FS_OPCODE_MOV_DISPATCH_TO_FLAGS reads from, but the hardware
* dictates that anyway.
*/
void
fs_visitor::opt_drop_redundant_mov_to_flags()
{
bool flag_mov_found[2] = {false};
foreach_block_and_inst_safe(block, fs_inst, inst, cfg) {
if (inst->is_control_flow()) {
memset(flag_mov_found, 0, sizeof(flag_mov_found));
} else if (inst->opcode == FS_OPCODE_MOV_DISPATCH_TO_FLAGS) {
if (!flag_mov_found[inst->flag_subreg])
flag_mov_found[inst->flag_subreg] = true;
else
inst->remove(block);
} else if (inst->writes_flag()) {
flag_mov_found[inst->flag_subreg] = false;
}
}
}
void
fs_visitor::optimize()
{
@@ -3459,8 +3430,6 @@ fs_visitor::optimize()
assign_constant_locations();
demote_pull_constants();
opt_drop_redundant_mov_to_flags();
#define OPT(pass, args...) do { \
pass_num++; \
bool this_progress = pass(args); \
src/mesa/drivers/dri/i965/brw_fs.h
-1
View File
@@ -422,7 +422,6 @@ public:
bool try_constant_propagate(fs_inst *inst, acp_entry *entry);
bool opt_copy_propagate_local(void *mem_ctx, bblock_t *block,
exec_list *acp);
void opt_drop_redundant_mov_to_flags();
bool opt_register_renaming();
bool register_coalesce();
bool compute_to_mrf();