diff options
Diffstat (limited to 'src/mesa')
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_vec4_copy_propagation.cpp | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_vec4_copy_propagation.cpp b/src/mesa/drivers/dri/i965/brw_vec4_copy_propagation.cpp index 4ef34f25dfc..fba71ae3dc2 100644 --- a/src/mesa/drivers/dri/i965/brw_vec4_copy_propagation.cpp +++ b/src/mesa/drivers/dri/i965/brw_vec4_copy_propagation.cpp @@ -324,6 +324,13 @@ try_copy_propagate(const struct gen_device_info *devinfo, value.file != ATTR) return false; + /* In gen < 8 instructions that write 2 registers also need to read 2 + * registers. Make sure we don't break that restriction by copy + * propagating from a uniform. + */ + if (devinfo->gen < 8 && inst->size_written > REG_SIZE && is_uniform(value)) + return false; + /* If the type of the copy value is different from the type of the * instruction then the swizzles and writemasks involved don't have the same * meaning and simply replacing the source would produce different semantics. |