[Mesa-dev] [PATCH 3/8] nir/builder: Add iadd_imm and imul_imm helpers

[Jason Ekstrand]

The pattern of adding or multiplying an integer by an immediate is
fairly common especially in deref chain handling.  This adds a helper
for it and uses it a few places.  The advantage to the helper is that
it automatically handles bit sizes for you.
---
 src/compiler/nir/nir_builder.h     | 12 ++++++++++++
 src/compiler/nir/nir_lower_io.c    |  5 ++---
 src/compiler/spirv/vtn_variables.c | 14 ++++++--------
 3 files changed, 20 insertions(+), 11 deletions(-)

diff --git a/src/compiler/nir/nir_builder.h b/src/compiler/nir/nir_builder.h
index 3be630ab3dd..cf096d41bf2 100644
--- a/src/compiler/nir/nir_builder.h
+++ b/src/compiler/nir/nir_builder.h
@@ -553,6 +553,18 @@ nir_channels(nir_builder *b, nir_ssa_def *def, nir_component_mask_t mask)
    return nir_swizzle(b, def, swizzle, num_channels, false);
 }
 
+static inline nir_ssa_def *
+nir_iadd_imm(nir_builder *build, nir_ssa_def *x, uint64_t y)
+{
+   return nir_iadd(build, x, nir_imm_intN_t(build, y, x->bit_size));
+}
+
+static inline nir_ssa_def *
+nir_imul_imm(nir_builder *build, nir_ssa_def *x, uint64_t y)
+{
+   return nir_imul(build, x, nir_imm_intN_t(build, y, x->bit_size));
+}
+
 /**
  * Turns a nir_src into a nir_ssa_def * so it can be passed to
  * nir_build_alu()-based builder calls.
diff --git a/src/compiler/nir/nir_lower_io.c b/src/compiler/nir/nir_lower_io.c
index b3595bb19d5..f3377eaec8f 100644
--- a/src/compiler/nir/nir_lower_io.c
+++ b/src/compiler/nir/nir_lower_io.c
@@ -127,8 +127,7 @@ get_io_offset(nir_builder *b, nir_deref_instr *deref,
          unsigned size = type_size((*p)->type);
 
          nir_ssa_def *mul =
-            nir_imul(b, nir_imm_int(b, size),
-                     nir_ssa_for_src(b, (*p)->arr.index, 1));
+            nir_imul_imm(b, nir_ssa_for_src(b, (*p)->arr.index, 1), size);
 
          offset = nir_iadd(b, offset, mul);
       } else if ((*p)->deref_type == nir_deref_type_struct) {
@@ -139,7 +138,7 @@ get_io_offset(nir_builder *b, nir_deref_instr *deref,
          for (unsigned i = 0; i < (*p)->strct.index; i++) {
             field_offset += type_size(glsl_get_struct_field(parent->type, i));
          }
-         offset = nir_iadd(b, offset, nir_imm_int(b, field_offset));
+         offset = nir_iadd_imm(b, offset, field_offset);
       } else {
          unreachable("Unsupported deref type");
       }
diff --git a/src/compiler/spirv/vtn_variables.c b/src/compiler/spirv/vtn_variables.c
index c5cf345d02a..586dcc5b99c 100644
--- a/src/compiler/spirv/vtn_variables.c
+++ b/src/compiler/spirv/vtn_variables.c
@@ -138,7 +138,7 @@ vtn_access_link_as_ssa(struct vtn_builder *b, struct vtn_access_link link,
       nir_ssa_def *src0 = vtn_ssa_value(b, link.id)->def;
       if (src0->bit_size != 32)
          src0 = nir_u2u32(&b->nb, src0);
-      return nir_imul(&b->nb, src0, nir_imm_int(&b->nb, stride));
+      return nir_imul_imm(&b->nb, src0, stride);
    }
 }
 
@@ -332,8 +332,7 @@ vtn_ssa_offset_pointer_dereference(struct vtn_builder *b,
       case GLSL_TYPE_STRUCT: {
          vtn_assert(deref_chain->link[idx].mode == vtn_access_mode_literal);
          unsigned member = deref_chain->link[idx].id;
-         nir_ssa_def *mem_offset = nir_imm_int(&b->nb, type->offsets[member]);
-         offset = nir_iadd(&b->nb, offset, mem_offset);
+         offset = nir_iadd_imm(&b->nb, offset, type->offsets[member]);
          type = type->members[member];
          access |= type->access;
          break;
@@ -717,7 +716,7 @@ _vtn_block_load_store(struct vtn_builder *b, nir_intrinsic_op op, bool load,
 
          for (unsigned i = 0; i < num_ops; i++) {
             nir_ssa_def *elem_offset =
-               nir_iadd(&b->nb, offset, nir_imm_int(&b->nb, i * col_stride));
+               nir_iadd_imm(&b->nb, offset, i * col_stride);
             _vtn_load_store_tail(b, op, load, index, elem_offset,
                                  access_offset, access_size,
                                  &(*inout)->elems[i],
@@ -747,8 +746,7 @@ _vtn_block_load_store(struct vtn_builder *b, nir_intrinsic_op op, bool load,
             nir_ssa_def *per_comp[4];
             for (unsigned i = 0; i < elems; i++) {
                nir_ssa_def *elem_offset =
-                  nir_iadd(&b->nb, offset,
-                                   nir_imm_int(&b->nb, i * type->stride));
+                  nir_iadd_imm(&b->nb, offset, i * type->stride);
                struct vtn_ssa_value *comp, temp_val;
                if (!load) {
                   temp_val.def = nir_channel(&b->nb, (*inout)->def, i);
@@ -775,7 +773,7 @@ _vtn_block_load_store(struct vtn_builder *b, nir_intrinsic_op op, bool load,
       unsigned elems = glsl_get_length(type->type);
       for (unsigned i = 0; i < elems; i++) {
          nir_ssa_def *elem_off =
-            nir_iadd(&b->nb, offset, nir_imm_int(&b->nb, i * type->stride));
+            nir_iadd_imm(&b->nb, offset, i * type->stride);
          _vtn_block_load_store(b, op, load, index, elem_off,
                                access_offset, access_size,
                                type->array_element,
@@ -789,7 +787,7 @@ _vtn_block_load_store(struct vtn_builder *b, nir_intrinsic_op op, bool load,
       unsigned elems = glsl_get_length(type->type);
       for (unsigned i = 0; i < elems; i++) {
          nir_ssa_def *elem_off =
-            nir_iadd(&b->nb, offset, nir_imm_int(&b->nb, type->offsets[i]));
+            nir_iadd_imm(&b->nb, offset, type->offsets[i]);
          _vtn_block_load_store(b, op, load, index, elem_off,
                                access_offset, access_size,
                                type->members[i],
-- 
2.19.1