diff options
| -rw-r--r-- | src/intel/compiler/brw_fs_cse.cpp | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/intel/compiler/brw_fs_cse.cpp b/src/intel/compiler/brw_fs_cse.cpp index b7c32f3907f..4751e11bcfe 100644 --- a/src/intel/compiler/brw_fs_cse.cpp +++ b/src/intel/compiler/brw_fs_cse.cpp @@ -317,6 +317,16 @@ fs_visitor::opt_cse_local(bblock_t *block, int &ip) } } + /* Discard jumps aren't represented in the CFG unfortunately, so we need + * to make sure that they behave as a CSE barrier, since we lack global + * dataflow information. This is particularly likely to cause problems + * with instructions dependent on the current execution mask like + * SHADER_OPCODE_FIND_LIVE_CHANNEL. + */ + if (inst->opcode == FS_OPCODE_DISCARD_JUMP || + inst->opcode == FS_OPCODE_PLACEHOLDER_HALT) + aeb.make_empty(); + foreach_in_list_safe(aeb_entry, entry, &aeb) { /* Kill all AEB entries that write a different value to or read from * the flag register if we just wrote it. |