radv: using tls to store llvm related info and speed up compiles (v10)

This uses the common compiler passes abstraction to help radv
avoid fixed cost compiler overheads. This uses a linked list per
thread stored in thread local storage, with an entry in the list
for each target machine.

This should remove all the fixed overheads setup costs of creating
the pass manager each time.

This takes a demo app time to compile the radv meta shaders on nocache
and exit from 1.7s to 1s. It also has been reported to take the startup
time of uncached shaders on RoTR from 12m24s to 11m35s (Alex)

v2: fix llvm6 build, inline emit function, handle multiple targets
in one thread
v3: rebase and port onto new structure
v4: rename some vars (Bas)
v5: drag all code into radv for now, we can refactor it out later
for radeonsi if we make it shareable
v6: use a bit more C++ in the wrapper
v7: logic bugs fixed so it actually runs again.
v8: rebase on top of radeonsi changes.
v9: drop some C++ headers, cleanup list entry
v10: use pop_back (didn't have enough caffeine)

Reviewed-by: Bas Nieuwenhuizen <[email protected]>

8 files changed, 199 insertions, 28 deletions

diff --git a/src/amd/vulkan/Makefile.sources b/src/amd/vulkan/Makefile.sources
index 70d56e88cb3..152fdd7cb71 100644
--- a/src/amd/vulkan/Makefile.sources
+++ b/src/amd/vulkan/Makefile.sources
@@ -54,6 +54,7 @@ VULKAN_FILES := \
 	radv_meta_resolve_cs.c \
 	radv_meta_resolve_fs.c \
 	radv_nir_to_llvm.c \
+	radv_llvm_helper.cpp \
 	radv_pass.c \
 	radv_pipeline.c \
 	radv_pipeline_cache.c \
@@ -62,6 +63,7 @@ VULKAN_FILES := \
 	radv_shader.c \
 	radv_shader_info.c \
 	radv_shader.h \
+	radv_shader_helper.h \
 	radv_query.c \
 	radv_util.c \
 	radv_util.h \
diff --git a/src/amd/vulkan/meson.build b/src/amd/vulkan/meson.build
index 22857926fa1..9f2842182e7 100644
--- a/src/amd/vulkan/meson.build
+++ b/src/amd/vulkan/meson.build
@@ -67,6 +67,7 @@ libradv_files = files(
   'radv_descriptor_set.h',
   'radv_formats.c',
   'radv_image.c',
+  'radv_llvm_helper.cpp',
   'radv_meta.c',
   'radv_meta.h',
   'radv_meta_blit.c',
@@ -88,6 +89,7 @@ libradv_files = files(
   'radv_radeon_winsys.h',
   'radv_shader.c',
   'radv_shader.h',
+  'radv_shader_helper.h',
   'radv_shader_info.c',
   'radv_query.c',
   'radv_util.c',
diff --git a/src/amd/vulkan/radv_debug.h b/src/amd/vulkan/radv_debug.h
index f1b0dc26a63..9fe4c3b7404 100644
--- a/src/amd/vulkan/radv_debug.h
+++ b/src/amd/vulkan/radv_debug.h
@@ -49,6 +49,7 @@ enum {
 	RADV_DEBUG_ERRORS            = 0x80000,
 	RADV_DEBUG_STARTUP           = 0x100000,
 	RADV_DEBUG_CHECKIR           = 0x200000,
+	RADV_DEBUG_NOTHREADLLVM      = 0x400000,
 };
 
 enum {
diff --git a/src/amd/vulkan/radv_device.c b/src/amd/vulkan/radv_device.c
index ad3465f594e..73c48cef1f0 100644
--- a/src/amd/vulkan/radv_device.c
+++ b/src/amd/vulkan/radv_device.c
@@ -436,6 +436,7 @@ static const struct debug_control radv_debug_options[] = {
 	{"errors", RADV_DEBUG_ERRORS},
 	{"startup", RADV_DEBUG_STARTUP},
 	{"checkir", RADV_DEBUG_CHECKIR},
+	{"nothreadllvm", RADV_DEBUG_NOTHREADLLVM},
 	{NULL, 0}
 };
 
diff --git a/src/amd/vulkan/radv_llvm_helper.cpp b/src/amd/vulkan/radv_llvm_helper.cpp
new file mode 100644
index 00000000000..ed05e1197ec
--- /dev/null
+++ b/src/amd/vulkan/radv_llvm_helper.cpp
@@ -0,0 +1,140 @@
+/*
+ * Copyright © 2018 Red Hat.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+#include "ac_llvm_util.h"
+#include "ac_llvm_build.h"
+#include "radv_shader_helper.h"
+
+#include <list>
+class radv_llvm_per_thread_info {
+public:
+	radv_llvm_per_thread_info(enum radeon_family arg_family,
+				enum ac_target_machine_options arg_tm_options)
+		: family(arg_family), tm_options(arg_tm_options) {}
+
+	~radv_llvm_per_thread_info()
+	{
+		ac_destroy_llvm_passes(passes);
+		ac_destroy_llvm_compiler(&llvm_info);
+	}
+
+	bool init(void)
+	{
+		if (!ac_init_llvm_compiler(&llvm_info,
+					  true,
+					  family,
+					  tm_options))
+			return false;
+
+		passes = ac_create_llvm_passes(llvm_info.tm);
+		if (!passes)
+			return false;
+
+		return true;
+	}
+
+	bool compile_to_memory_buffer(LLVMModuleRef module,
+				      struct ac_shader_binary *binary)
+	{
+		return ac_compile_module_to_binary(passes, module, binary);
+	}
+
+	bool is_same(enum radeon_family arg_family,
+		     enum ac_target_machine_options arg_tm_options) {
+		if (arg_family == family &&
+		    arg_tm_options == tm_options)
+			return true;
+		return false;
+	}
+	struct ac_llvm_compiler llvm_info;
+private:
+	enum radeon_family family;
+	enum ac_target_machine_options tm_options;
+	struct ac_compiler_passes *passes;
+};
+
+/* we have to store a linked list per thread due to the possiblity of multiple gpus being required */
+static thread_local std::list<radv_llvm_per_thread_info> radv_llvm_per_thread_list;
+
+bool radv_compile_to_binary(struct ac_llvm_compiler *info,
+			    LLVMModuleRef module,
+			    struct ac_shader_binary *binary)
+{
+	radv_llvm_per_thread_info *thread_info = nullptr;
+
+	for (auto &I : radv_llvm_per_thread_list) {
+		if (I.llvm_info.tm == info->tm) {
+			thread_info = &I;
+			break;
+		}
+	}
+
+	if (!thread_info) {
+		struct ac_compiler_passes *passes = ac_create_llvm_passes(info->tm);
+		bool ret = ac_compile_module_to_binary(passes, module, binary);
+		ac_destroy_llvm_passes(passes);
+		return ret;
+	}
+
+	return thread_info->compile_to_memory_buffer(module, binary);
+}
+
+bool radv_init_llvm_compiler(struct ac_llvm_compiler *info,
+			     bool okay_to_leak_target_library_info,
+			     bool thread_compiler,
+			     enum radeon_family family,
+			     enum ac_target_machine_options tm_options)
+{
+	if (thread_compiler) {
+		for (auto &I : radv_llvm_per_thread_list) {
+			if (I.is_same(family, tm_options)) {
+				*info = I.llvm_info;
+				return true;
+			}
+		}
+
+		radv_llvm_per_thread_list.emplace_back(family, tm_options);
+		radv_llvm_per_thread_info &tinfo = radv_llvm_per_thread_list.back();
+
+		if (!tinfo.init()) {
+			radv_llvm_per_thread_list.pop_back();
+			return false;
+		}
+
+		*info = tinfo.llvm_info;
+		return true;
+	}
+
+	if (!ac_init_llvm_compiler(info,
+				   okay_to_leak_target_library_info,
+				   family,
+				   tm_options))
+		return false;
+	return true;
+}
+
+void radv_destroy_llvm_compiler(struct ac_llvm_compiler *info,
+				bool thread_compiler)
+{
+	if (!thread_compiler)
+		ac_destroy_llvm_compiler(info);
+}
diff --git a/src/amd/vulkan/radv_nir_to_llvm.c b/src/amd/vulkan/radv_nir_to_llvm.c
index cc3ae006aaa..c7d772fa652 100644
--- a/src/amd/vulkan/radv_nir_to_llvm.c
+++ b/src/amd/vulkan/radv_nir_to_llvm.c
@@ -27,6 +27,7 @@
 
 #include "radv_private.h"
 #include "radv_shader.h"
+#include "radv_shader_helper.h"
 #include "nir/nir.h"
 
 #include <llvm-c/Core.h>
@@ -3331,12 +3332,7 @@ static unsigned ac_llvm_compile(LLVMModuleRef M,
                                 struct ac_llvm_compiler *ac_llvm)
 {
 	unsigned retval = 0;
-	char *err;
 	LLVMContextRef llvm_ctx;
-	LLVMMemoryBufferRef out_buffer;
-	unsigned buffer_size;
-	const char *buffer_data;
-	LLVMBool mem_err;
 
 	/* Setup Diagnostic Handler*/
 	llvm_ctx = LLVMGetModuleContext(M);
@@ -3345,27 +3341,8 @@ static unsigned ac_llvm_compile(LLVMModuleRef M,
 	                                &retval);
 
 	/* Compile IR*/
-	mem_err = LLVMTargetMachineEmitToMemoryBuffer(ac_llvm->tm, M, LLVMObjectFile,
-	                                              &err, &out_buffer);
-
-	/* Process Errors/Warnings */
-	if (mem_err) {
-		fprintf(stderr, "%s: %s", __FUNCTION__, err);
-		free(err);
+	if (!radv_compile_to_binary(ac_llvm, M, binary))
 		retval = 1;
-		goto out;
-	}
-
-	/* Extract Shader Code*/
-	buffer_size = LLVMGetBufferSize(out_buffer);
-	buffer_data = LLVMGetBufferStart(out_buffer);
-
-	ac_elf_read(buffer_data, buffer_size, binary);
-
-	/* Clean up */
-	LLVMDisposeMemoryBuffer(out_buffer);
-
-out:
 	return retval;
 }
 
diff --git a/src/amd/vulkan/radv_shader.c b/src/amd/vulkan/radv_shader.c
index 5cca761d89e..13990059985 100644
--- a/src/amd/vulkan/radv_shader.c
+++ b/src/amd/vulkan/radv_shader.c
@@ -30,6 +30,7 @@
 #include "radv_debug.h"
 #include "radv_private.h"
 #include "radv_shader.h"
+#include "radv_shader_helper.h"
 #include "nir/nir.h"
 #include "nir/nir_builder.h"
 #include "spirv/nir_spirv.h"
@@ -542,7 +543,7 @@ shader_variant_create(struct radv_device *device,
 	struct radv_shader_variant *variant;
 	struct ac_shader_binary binary;
 	struct ac_llvm_compiler ac_llvm;
-
+	bool thread_compiler;
 	variant = calloc(1, sizeof(struct radv_shader_variant));
 	if (!variant)
 		return NULL;
@@ -564,8 +565,11 @@ shader_variant_create(struct radv_device *device,
 	if (options->check_ir)
 		tm_options |= AC_TM_CHECK_IR;
 
+	thread_compiler = !(device->instance->debug_flags & RADV_DEBUG_NOTHREADLLVM);
 	radv_init_llvm_once();
-	ac_init_llvm_compiler(&ac_llvm, false, chip_family, tm_options);
+	radv_init_llvm_compiler(&ac_llvm, false,
+				thread_compiler,
+				chip_family, tm_options);
 	if (gs_copy_shader) {
 		assert(shader_count == 1);
 		radv_compile_gs_copy_shader(&ac_llvm, *shaders, &binary,
@@ -577,7 +581,7 @@ shader_variant_create(struct radv_device *device,
 					options);
 	}
 
-	ac_destroy_llvm_compiler(&ac_llvm);
+	radv_destroy_llvm_compiler(&ac_llvm, thread_compiler);
 
 	radv_fill_shader_variant(device, variant, &binary, stage);
 
diff --git a/src/amd/vulkan/radv_shader_helper.h b/src/amd/vulkan/radv_shader_helper.h
new file mode 100644
index 00000000000..3c81f5be54a
--- /dev/null
+++ b/src/amd/vulkan/radv_shader_helper.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright © 2018 Red Hat.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+#ifndef RADV_SHADER_HELPER_H
+#define RADV_SHADER_HELPER_H
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+bool radv_init_llvm_compiler(struct ac_llvm_compiler *info,
+			     bool okay_to_leak_target_library_info,
+			     bool thread_compiler,
+			     enum radeon_family family,
+			     enum ac_target_machine_options tm_options);
+void radv_destroy_llvm_compiler(struct ac_llvm_compiler *info,
+				bool thread_compiler);
+
+bool radv_compile_to_binary(struct ac_llvm_compiler *info,
+			    LLVMModuleRef module,
+			    struct ac_shader_binary *binary);
+
+#ifdef __cplusplus
+}
+#endif
+#endif