diff options
| -rw-r--r-- | src/mesa/state_tracker/st_glsl_to_tgsi.cpp | 18 |
1 files changed, 8 insertions, 10 deletions
diff --git a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp index 59b5ffd4c32..6cc655d70cf 100644 --- a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp +++ b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp @@ -3514,25 +3514,23 @@ glsl_to_tgsi_visitor::eliminate_dead_code_advanced(void) break; case TGSI_OPCODE_ENDIF: - --level; - break; - case TGSI_OPCODE_ELSE: - /* Clear all channels written inside the preceding if block from the - * write array, but leave those that were not touched. - * - * FIXME: This destroys opportunities to remove dead code inside of - * IF blocks that are followed by an ELSE block. + /* Promote the recorded level all channels written inside the preceding + * if or else block to the level above the if/else block. */ for (int r = 0; r < this->next_temp; r++) { for (int c = 0; c < 4; c++) { if (!writes[4 * r + c]) continue; - if (write_level[4 * r + c] >= level) - writes[4 * r + c] = NULL; + if (write_level[4 * r + c] == level) + write_level[4 * r + c] = level-1; } } + + if(inst->op == TGSI_OPCODE_ENDIF) + --level; + break; case TGSI_OPCODE_IF: |