diff options
Diffstat (limited to 'src/mesa')
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_fs_register_coalesce.cpp | 37 |
1 files changed, 26 insertions, 11 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_fs_register_coalesce.cpp b/src/mesa/drivers/dri/i965/brw_fs_register_coalesce.cpp index 5c16798d68b..c71fd47bbe7 100644 --- a/src/mesa/drivers/dri/i965/brw_fs_register_coalesce.cpp +++ b/src/mesa/drivers/dri/i965/brw_fs_register_coalesce.cpp @@ -122,6 +122,8 @@ fs_visitor::register_coalesce() int reg_from = -1, reg_to = -1; int reg_to_offset[MAX_SAMPLER_MESSAGE_SIZE]; fs_inst *mov[MAX_SAMPLER_MESSAGE_SIZE]; + int var_to[MAX_SAMPLER_MESSAGE_SIZE]; + int var_from[MAX_SAMPLER_MESSAGE_SIZE]; foreach_list(node, &this->instructions) { fs_inst *inst = (fs_inst *)node; @@ -129,12 +131,6 @@ fs_visitor::register_coalesce() if (!is_coalesce_candidate(inst, virtual_grf_sizes)) continue; - int var_from = live_intervals->var_from_reg(&inst->src[0]); - int var_to = live_intervals->var_from_reg(&inst->dst); - - if (!can_coalesce_vars(live_intervals, &instructions, inst, var_to, var_from)) - continue; - if (reg_from != inst->src[0].reg) { reg_from = inst->src[0].reg; @@ -158,6 +154,21 @@ fs_visitor::register_coalesce() if (channels_remaining) continue; + bool can_coalesce = true; + for (int i = 0; i < src_size; i++) { + var_to[i] = live_intervals->var_from_vgrf[reg_to] + reg_to_offset[i]; + var_from[i] = live_intervals->var_from_vgrf[reg_from] + i; + + if (!can_coalesce_vars(live_intervals, &instructions, inst, + var_to[i], var_from[i])) { + can_coalesce = false; + break; + } + } + + if (!can_coalesce) + continue; + bool removed = false; for (int i = 0; i < src_size; i++) { if (mov[i]) { @@ -196,11 +207,15 @@ fs_visitor::register_coalesce() } if (removed) { - live_intervals->start[var_to] = MIN2(live_intervals->start[var_to], - live_intervals->start[var_from]); - live_intervals->end[var_to] = MAX2(live_intervals->end[var_to], - live_intervals->end[var_from]); - reg_from = -1; + for (int i = 0; i < src_size; i++) { + live_intervals->start[var_to[i]] = + MIN2(live_intervals->start[var_to[i]], + live_intervals->start[var_from[i]]); + live_intervals->end[var_to[i]] = + MAX2(live_intervals->end[var_to[i]], + live_intervals->end[var_from[i]]); + reg_from = -1; + } } } |