llvmpipe: pass number of samplers into llvm sampler code.

This is to be used later for indirect texture access

Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/3778>

src/gallium/drivers/llvmpipe/lp_state_cs.c

@@ -174,7 +174,7 @@ generate_compute(struct llvmpipe_context *lp,
    builder = gallivm->builder;
    assert(builder);
    LLVMPositionBuilderAtEnd(builder, block);
-   sampler = lp_llvm_sampler_soa_create(key->samplers);
+   sampler = lp_llvm_sampler_soa_create(key->samplers, key->nr_samplers);
    image = lp_llvm_image_soa_create(lp_cs_variant_key_images(key));
 
    struct lp_build_loop_state loop_state[4];

src/gallium/drivers/llvmpipe/lp_state_fs.c

@@ -2916,7 +2916,7 @@ generate_fragment(struct llvmpipe_context *lp,
    }
 
    /* code generated texture sampling */
-   sampler = lp_llvm_sampler_soa_create(key->samplers);
+   sampler = lp_llvm_sampler_soa_create(key->samplers, key->nr_samplers);
    image = lp_llvm_image_soa_create(lp_fs_variant_key_images(key));
 
    num_fs = 16 / fs_type.length; /* number of loops per 4x4 stamp */

src/gallium/drivers/llvmpipe/lp_tex_sample.c

@@ -76,6 +76,7 @@ struct lp_llvm_sampler_soa
    struct lp_build_sampler_soa base;
 
    struct llvmpipe_sampler_dynamic_state dynamic_state;
+   unsigned nr_samplers;
 };
 
 struct llvmpipe_image_dynamic_state
@@ -385,7 +386,8 @@ lp_llvm_sampler_soa_emit_size_query(const struct lp_build_sampler_soa *base,
 
 
 struct lp_build_sampler_soa *
-lp_llvm_sampler_soa_create(const struct lp_sampler_static_state *static_state)
+lp_llvm_sampler_soa_create(const struct lp_sampler_static_state *static_state,
+                           unsigned nr_samplers)
 {
    struct lp_llvm_sampler_soa *sampler;
 
@@ -418,6 +420,7 @@ lp_llvm_sampler_soa_create(const struct lp_sampler_static_state *static_state)
 
    sampler->dynamic_state.static_state = static_state;
 
+   sampler->nr_samplers = nr_samplers;
    return &sampler->base;
 }
 

src/gallium/drivers/llvmpipe/lp_tex_sample.h

@@ -45,7 +45,8 @@ struct lp_image_static_state;
  *
  */
 struct lp_build_sampler_soa *
-lp_llvm_sampler_soa_create(const struct lp_sampler_static_state *key);
+lp_llvm_sampler_soa_create(const struct lp_sampler_static_state *key,
+                           unsigned nr_samplers);
 
 struct lp_build_image_soa *
 lp_llvm_image_soa_create(const struct lp_image_static_state *key);