X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=src%2Fmesa%2Fdrivers%2Fdri%2Fi965%2Fbrw_fs_cmod_propagation.cpp;h=af1e3ebbaa2a698b784da790dca98acc0fd7e56e;hb=93d2b5c57632f5cc57e71511bc6e33f8474e40fd;hp=883e8d2a49f78aa4ddb3e9c4299721df3b9858e7;hpb=fed60e3c73c7be7c1e2194054daf29381d0ddc18;p=mesa.git

diff --git a/src/mesa/drivers/dri/i965/brw_fs_cmod_propagation.cpp b/src/mesa/drivers/dri/i965/brw_fs_cmod_propagation.cpp
index 883e8d2a49f..af1e3ebbaa2 100644
--- a/src/mesa/drivers/dri/i965/brw_fs_cmod_propagation.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_cmod_propagation.cpp
@@ -22,8 +22,8 @@
  */
 
 #include "brw_fs.h"
-#include "brw_fs_live_variables.h"
 #include "brw_cfg.h"
+#include "brw_eu.h"
 
 /** @file brw_fs_cmod_propagation.cpp
  *
@@ -49,7 +49,7 @@
  */
 
 static bool
-opt_cmod_propagation_local(bblock_t *block)
+opt_cmod_propagation_local(const brw_device_info *devinfo, bblock_t *block)
 {
    bool progress = false;
    int ip = block->end_ip + 1;
@@ -62,7 +62,7 @@ opt_cmod_propagation_local(bblock_t *block)
            inst->opcode != BRW_OPCODE_MOV) ||
           inst->predicate != BRW_PREDICATE_NONE ||
           !inst->dst.is_null() ||
-          inst->src[0].file != GRF ||
+          inst->src[0].file != VGRF ||
           inst->src[0].abs)
          continue;
 
@@ -90,7 +90,8 @@ opt_cmod_propagation_local(bblock_t *block)
       foreach_inst_in_block_reverse_starting_from(fs_inst, scan_inst, inst) {
          if (scan_inst->overwrites_reg(inst->src[0])) {
             if (scan_inst->is_partial_write() ||
-                scan_inst->dst.reg_offset != inst->src[0].reg_offset)
+                scan_inst->dst.reg_offset != inst->src[0].reg_offset ||
+                scan_inst->exec_size != inst->exec_size)
                break;
 
             /* CMP's result is the same regardless of dest type. */
@@ -122,12 +123,24 @@ opt_cmod_propagation_local(bblock_t *block)
              */
             if (inst->conditional_mod == BRW_CONDITIONAL_NZ &&
                 !inst->src[0].negate &&
-                scan_inst->writes_flag()) {
+                scan_inst->flags_written()) {
                inst->remove(block);
                progress = true;
                break;
             }
 
+            /* The conditional mod of the CMP/CMPN instructions behaves
+             * specially because the flag output is not calculated from the
+             * result of the instruction, but the other way around, which
+             * means that even if the condmod to propagate and the condmod
+             * from the CMP instruction are the same they will in general give
+             * different results because they are evaluated based on different
+             * inputs.
+             */
+            if (scan_inst->opcode == BRW_OPCODE_CMP ||
+                scan_inst->opcode == BRW_OPCODE_CMPN)
+               break;
+
             /* Otherwise, try propagating the conditional. */
             enum brw_conditional_mod cond =
                inst->src[0].negate ? brw_swap_cmod(inst->conditional_mod)
@@ -143,10 +156,10 @@ opt_cmod_propagation_local(bblock_t *block)
             break;
          }
 
-         if (scan_inst->writes_flag())
+         if (scan_inst->flags_written())
             break;
 
-         read_flag = read_flag || scan_inst->reads_flag();
+         read_flag = read_flag || scan_inst->flags_read(devinfo);
       }
    }
 
@@ -159,7 +172,7 @@ fs_visitor::opt_cmod_propagation()
    bool progress = false;
 
    foreach_block_reverse(block, cfg) {
-      progress = opt_cmod_propagation_local(block) || progress;
+      progress = opt_cmod_propagation_local(devinfo, block) || progress;
    }
 
    if (progress)