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
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