radv/radeonsi: Don't count read-only data when reporting code size

We usually use these counts as a simple way to figure out if a change
reduces the number of instructions or shrinks an instruction. However,
since .rodata sections aren't executed, we shouldn't be counting their
size for this analysis. Make the linker return the total executable
size, and use it to report the more useful size in both drivers.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>

src/amd/common/ac_rtld.c

@@ -271,6 +271,7 @@ bool ac_rtld_open(struct ac_rtld_binary *binary,
 	uint64_t pasted_text_size = 0;
 	uint64_t rx_align = 1;
 	uint64_t rx_size = 0;
+	uint64_t exec_size = 0;
 
 #define report_if(cond) \
 	do { \
@@ -370,6 +371,8 @@ bool ac_rtld_open(struct ac_rtld_binary *binary,
 
 					if (!strcmp(s->name, ".text"))
 						s->is_pasted_text = true;
+
+					exec_size += shdr->sh_size;
 				}
 
 				if (s->is_pasted_text) {
@@ -438,6 +441,7 @@ bool ac_rtld_open(struct ac_rtld_binary *binary,
 	}
 
 	binary->rx_size += rx_size;
+	binary->exec_size = exec_size;
 
 	if (i.info->chip_class >= GFX10) {
 		/* In gfx10, the SQ fetches up to 3 cache lines of 16 dwords

src/amd/common/ac_rtld.h

@@ -57,6 +57,9 @@ struct ac_rtld_binary {
 	/* Required buffer sizes, currently read/executable only. */
 	uint64_t rx_size;
 
+	/* Size of executable code, for reporting purposes. */
+	uint64_t exec_size;
+
 	uint64_t rx_end_markers;
 
 	unsigned num_parts;

src/amd/vulkan/radv_pipeline.c

@@ -5025,7 +5025,7 @@ VkResult radv_GetPipelineExecutableStatisticsKHR(
 		desc_copy(s->name, "Code size");
 		desc_copy(s->description, "Code size in bytes");
 		s->format = VK_PIPELINE_EXECUTABLE_STATISTIC_FORMAT_UINT64_KHR;
-		s->value.u64 = shader->code_size;
+		s->value.u64 = shader->exec_size;
 	}
 	++s;
 

src/amd/vulkan/radv_shader.c

@@ -941,10 +941,12 @@ radv_shader_variant_create(struct radv_device *device,
 		}
 
 		variant->code_size = rtld_binary.rx_size;
+		variant->exec_size = rtld_binary.exec_size;
 	} else {
 		assert(binary->type == RADV_BINARY_TYPE_LEGACY);
 		config = ((struct radv_shader_binary_legacy *)binary)->config;
 		variant->code_size = radv_get_shader_binary_size(((struct radv_shader_binary_legacy *)binary)->code_size);
+		variant->exec_size = variant->code_size;
 	}
 
 	variant->info = binary->variant_info;
@@ -1299,7 +1301,7 @@ generate_shader_stats(struct radv_device *device,
 				   "********************\n\n\n",
 				   conf->num_sgprs, conf->num_vgprs,
 				   conf->spilled_sgprs, conf->spilled_vgprs,
-				   variant->info.private_mem_vgprs, variant->code_size,
+				   variant->info.private_mem_vgprs, variant->exec_size,
 				   conf->lds_size, conf->scratch_bytes_per_wave,
 				   max_simd_waves);
 }

src/amd/vulkan/radv_shader.h

@@ -350,6 +350,7 @@ struct radv_shader_variant {
 	uint64_t bo_offset;
 	struct ac_shader_config config;
 	uint32_t code_size;
+	uint32_t exec_size;
 	struct radv_shader_variant_info info;
 
 	/* debug only */

src/gallium/drivers/radeonsi/si_shader.c

@@ -5286,7 +5286,7 @@ static unsigned si_get_shader_binary_size(struct si_screen *screen, struct si_sh
 {
 	struct ac_rtld_binary rtld;
 	si_shader_binary_open(screen, shader, &rtld);
-	return rtld.rx_size;
+	return rtld.exec_size;
 }
 
 static bool si_get_external_symbol(void *data, const char *name, uint64_t *value)