nir: Use 8-bit types for most info fields

This shrinks nir_intrinsics.c.o from 73K to 35K and nir_opcodes.c.o from
64K to 31K on a release build.

Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5045>

diff --git a/src/compiler/nir/nir.h b/src/compiler/nir/nir.h
index e393fb491009d77133aec8d2968ff10451886dfe..dec20d33fd33e1ece7b9ea6e80648fd21b66d6e2 100644 (file)
--- a/src/compiler/nir/nir.h
+++ b/src/compiler/nir/nir.h
@@ -987,7 +987,7 @@ typedef struct {
  * The values in this enum are carefully chosen so that the sized type is
  * just the unsized type OR the number of bits.
  */
-typedef enum {
+typedef enum PACKED {
    nir_type_invalid = 0, /* Not a valid type */
    nir_type_int =       2,
    nir_type_uint =      4,
@@ -1217,7 +1217,7 @@ typedef enum {
 typedef struct {
    const char *name;
 
-   unsigned num_inputs;
+   uint8_t num_inputs;
 
    /**
     * The number of components in the output
@@ -1236,7 +1236,7 @@ typedef struct {
     * though output_size is zero; in that case, the inputs with a zero
     * size act per-component, while the inputs with non-zero size don't.
     */
-   unsigned output_size;
+   uint8_t output_size;
 
    /**
     * The type of vector that the instruction outputs. Note that the
@@ -1248,7 +1248,7 @@ typedef struct {
    /**
     * The number of components in each input
     */
-   unsigned input_sizes[NIR_MAX_VEC_COMPONENTS];
+   uint8_t input_sizes[NIR_MAX_VEC_COMPONENTS];
 
    /**
     * The type of vector that each input takes. Note that negate and
@@ -1703,7 +1703,7 @@ typedef enum {
 typedef struct {
    const char *name;
 
-   unsigned num_srcs; /** < number of register/SSA inputs */
+   uint8_t num_srcs; /** < number of register/SSA inputs */
 
    /** number of components of each input register
     *
@@ -1712,7 +1712,7 @@ typedef struct {
     * intrinsic consumes however many components are provided and it is not
     * validated at all.
     */
-   int src_components[NIR_INTRINSIC_MAX_INPUTS];
+   int8_t src_components[NIR_INTRINSIC_MAX_INPUTS];
 
    bool has_dest;
 
@@ -1721,16 +1721,16 @@ typedef struct {
     * If this value is 0, the number of components is given by the
     * num_components field of nir_intrinsic_instr.
     */
-   unsigned dest_components;
+   uint8_t dest_components;
 
    /** bitfield of legal bit sizes */
-   unsigned dest_bit_sizes;
+   uint8_t dest_bit_sizes;
 
    /** the number of constant indices used by the intrinsic */
-   unsigned num_indices;
+   uint8_t num_indices;
 
    /** indicates the usage of intr->const_index[n] */
-   unsigned index_map[NIR_INTRINSIC_NUM_INDEX_FLAGS];
+   uint8_t index_map[NIR_INTRINSIC_NUM_INDEX_FLAGS];
 
    /** semantic flags for calls to this intrinsic */
    nir_intrinsic_semantic_flag flags;

diff --git a/src/compiler/nir/nir_serialize.c b/src/compiler/nir/nir_serialize.c
index ddb9628b3c10b5b9afa8bfed6c073b3a4e579660..6688e9e8b172260ed05986b4f7052238774601e6 100644 (file)
--- a/src/compiler/nir/nir_serialize.c
+++ b/src/compiler/nir/nir_serialize.c
@@ -1443,7 +1443,7 @@ union packed_tex_data {
    uint32_t u32;
    struct {
       enum glsl_sampler_dim sampler_dim:4;
-      nir_alu_type dest_type:8;
+      unsigned dest_type:8;
       unsigned coord_components:3;
       unsigned is_array:1;
       unsigned is_shadow:1;