[Mesa-dev] [PATCH] i965/fs: retype offset_reg to UD at load_ssbo

[Jose Maria Casanova Crespo]

All operations with offset_reg at do_vector_read are done
with UD type. So copy propagation was not working through
the generated MOVs:

mov(8) vgrf9:UD, vgrf7:D

This change allows removing the MOV generated for reading the
first components for 16-bit and 64-bit ssbo reads with
non-constant offsets.
---
 src/intel/compiler/brw_fs_nir.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/intel/compiler/brw_fs_nir.cpp b/src/intel/compiler/brw_fs_nir.cpp
index 6c4bcd1c113..0ebaab96634 100644
--- a/src/intel/compiler/brw_fs_nir.cpp
+++ b/src/intel/compiler/brw_fs_nir.cpp
@@ -4142,7 +4142,7 @@ fs_visitor::nir_emit_intrinsic(const fs_builder &bld, nir_intrinsic_instr *instr
       if (const_offset) {
          offset_reg = brw_imm_ud(const_offset->u32[0]);
       } else {
-         offset_reg = get_nir_src(instr->src[1]);
+         offset_reg = retype(get_nir_src(instr->src[1]), BRW_REGISTER_TYPE_UD);
       }
 
       /* Read the vector */
-- 
2.17.0