intel: Always call nir_lower_frexp.

We have NIR lowering for Vulkan, and rely on GLSL's lowering in the
frontend, but this will let us drop the GLSL lowering.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/22083>

src/intel/compiler/brw_kernel.c

@@ -439,7 +439,6 @@ brw_kernel_from_spirv(struct brw_compiler *compiler,
               nir_var_mem_shared | nir_var_mem_global,
               nir_address_format_62bit_generic);
 
-   NIR_PASS_V(nir, nir_lower_frexp);
    NIR_PASS_V(nir, nir_lower_convert_alu_types, NULL);
 
    NIR_PASS_V(nir, brw_nir_lower_cs_intrinsics);

src/intel/compiler/brw_nir.c

@@ -930,6 +930,8 @@ brw_preprocess_nir(const struct brw_compiler *compiler, nir_shader *nir,
 
    nir_validate_ssa_dominance(nir, "before brw_preprocess_nir");
 
+   OPT(nir_lower_frexp);
+
    if (is_scalar) {
       OPT(nir_lower_alu_to_scalar, NULL, NULL);
    }

src/intel/vulkan/anv_pipeline.c

@@ -252,8 +252,6 @@ anv_shader_stage_to_nir(struct anv_device *device,
    };
    NIR_PASS(_, nir, nir_opt_access, &opt_access_options);
 
-   NIR_PASS(_, nir, nir_lower_frexp);
-
    /* Vulkan uses the separate-shader linking model */
    nir->info.separate_shader = true;
 

src/intel/vulkan_hasvk/anv_pipeline.c

@@ -158,8 +158,6 @@ anv_shader_stage_to_nir(struct anv_device *device,
    };
    NIR_PASS(_, nir, nir_opt_access, &opt_access_options);
 
-   NIR_PASS(_, nir, nir_lower_frexp);
-
    /* Vulkan uses the separate-shader linking model */
    nir->info.separate_shader = true;