[Mesa-dev] [PATCH] i965: check inst->predicate when clearing flag_live at dead code eliminate

[Alejandro Piñeiro]

Detected by Matt Turner while reviewing commit
a59359ecd22154cc2b3f88bb8c599f21af8a3934
---
 src/mesa/drivers/dri/i965/brw_fs_dead_code_eliminate.cpp   | 2 +-
 src/mesa/drivers/dri/i965/brw_vec4_dead_code_eliminate.cpp | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/brw_fs_dead_code_eliminate.cpp 
b/src/mesa/drivers/dri/i965/brw_fs_dead_code_eliminate.cpp
index 4b5548a..1eaf147 100644
--- a/src/mesa/drivers/dri/i965/brw_fs_dead_code_eliminate.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_dead_code_eliminate.cpp
@@ -105,7 +105,7 @@ fs_visitor::dead_code_eliminate()
             }
          }
 
-         if (inst->writes_flag()) {
+         if (inst->writes_flag() && !inst->predicate) {
             BITSET_CLEAR(flag_live, inst->flag_subreg);
          }
 
diff --git a/src/mesa/drivers/dri/i965/brw_vec4_dead_code_eliminate.cpp 
b/src/mesa/drivers/dri/i965/brw_vec4_dead_code_eliminate.cpp
index 284e0a8..e8a51d6 100644
--- a/src/mesa/drivers/dri/i965/brw_vec4_dead_code_eliminate.cpp
+++ b/src/mesa/drivers/dri/i965/brw_vec4_dead_code_eliminate.cpp
@@ -145,7 +145,7 @@ vec4_visitor::dead_code_eliminate()
             }
          }
 
-         if (inst->writes_flag()) {
+         if (inst->writes_flag() && !inst->predicate) {
             for (unsigned c = 0; c < 4; c++)
                BITSET_CLEAR(flag_live, c);
          }
-- 
2.1.4

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