Add glsl_compiler main file and build target

glsl_compiler.cpp is a slightly modified copy of src/glsl/main.cpp
from Mesa repository

Change-Id: Ic246291392e26c0a424926764f59aaafa8c6063f
Signed-off-by: David Li <davidxli@google.com>

4 files changed, 323 insertions, 7 deletions

diff --git a/Android.mk b/Android.mk
index 6dd3223..4621274 100644
--- a/Android.mk
+++ b/Android.mk
@@ -1,6 +1,6 @@
 # USE_LLVM_EXECUTIONENGINE not fully implemented
-USE_LLVM_EXECUTIONENGINE := false 
-# if using libLLVMExecutionEngine, 
+USE_LLVM_EXECUTIONENGINE := false
+# if using libLLVMExecutionEngine,
 # need to add files to several Android.mk in external/llvm, and comment out some stuff in llvm DynamicLibrary.cpp and Intercept.cpp
 
 DEBUG_BUILD := false
@@ -114,7 +114,7 @@ libMesa_SRC_FILES :=	\
 	src/pixelflinger2/shader.cpp \
 	src/pixelflinger2/texture.cpp \
 	src/talloc/hieralloc.c
-	
+
 libMesa_C_INCLUDES := \
 	$(LOCAL_PATH) \
 	$(LOCAL_PATH)/src/glsl	\
@@ -123,7 +123,7 @@ libMesa_C_INCLUDES := \
 	$(LOCAL_PATH)/src/mapi	\
 	$(LOCAL_PATH)/include	\
 	frameworks/compile/libbcc/include
-	
+
 # Static library for host
 # ========================================================
 include $(CLEAR_VARS)
@@ -131,7 +131,7 @@ include $(CLEAR_VARS)
 LOCAL_MODULE_TAGS := optional
 
 ifeq ($(DEBUG_BUILD),true)
-LOCAL_CFLAGS += -DDEBUG -UNDEBUG -O0 -g 
+LOCAL_CFLAGS += -DDEBUG -UNDEBUG -O0 -g
 else
 LOCAL_CFLAGS += -O3
 endif
@@ -174,7 +174,7 @@ LOCAL_CFLAGS += -DUSE_LLVM_EXECUTIONENGINE=1
 LOCAL_STATIC_LIBRARIES :=  libLLVMARMCodeGen libLLVMARMInfo libLLVMARMDisassembler libLLVMARMAsmPrinter $(libMesa_STATIC_LIBS)
 else
 LOCAL_CFLAGS += -DUSE_LLVM_EXECUTIONENGINE=0
-LOCAL_SHARED_LIBRARIES += libbcc 
+LOCAL_SHARED_LIBRARIES += libbcc
 endif
 
 LOCAL_C_INCLUDES :=	$(libMesa_C_INCLUDES)
@@ -182,6 +182,23 @@ LOCAL_C_INCLUDES :=	$(libMesa_C_INCLUDES)
 include $(LLVM_ROOT_PATH)/llvm-device-build.mk
 include $(BUILD_STATIC_LIBRARY)
 
+# glsl_compiler for host
+# ========================================================
+include $(CLEAR_VARS)
+
+LOCAL_MODULE_TAGS := optional
+
+ifeq ($(DEBUG_BUILD),true)
+LOCAL_CFLAGS += -DDEBUG -UNDEBUG -O0 -g
+endif
+
+LOCAL_MODULE := glsl_compiler
+LOCAL_SRC_FILES := src/glsl/glsl_compiler.cpp
+LOCAL_C_INCLUDES := $(libMesa_C_INCLUDES)
+LOCAL_STATIC_LIBRARIES := libMesa
+
+include $(BUILD_HOST_EXECUTABLE)
+
 # Build children
 # ========================================================
 include $(call all-makefiles-under,$(LOCAL_PATH))
diff --git a/libMesa.project b/libMesa.project
index 66b0723..bb549dd 100644
--- a/libMesa.project
+++ b/libMesa.project
@@ -170,6 +170,7 @@
       <File Name="src/glsl/lower_if_to_cond_assign.cpp"/>
       <File Name="src/glsl/lower_mat_op_to_vec.cpp"/>
       <File Name="src/glsl/ast.h"/>
+      <File Name="src/glsl/glsl_compiler.cpp"/>
     </VirtualDirectory>
     <VirtualDirectory Name="talloc">
       <File Name="src/talloc/hieralloc.c"/>
diff --git a/src/glsl/glsl_compiler.cpp b/src/glsl/glsl_compiler.cpp
new file mode 100644
index 0000000..72baa7d
--- /dev/null
+++ b/src/glsl/glsl_compiler.cpp
@@ -0,0 +1,298 @@
+/*
+ * Copyright © 2008, 2009 Intel Corporation
+ *
+ * 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 <cstdlib>
+#include <cstdio>
+#include <getopt.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#include "ast.h"
+#include "glsl_parser_extras.h"
+#include "glsl_parser.h"
+#include "ir_optimization.h"
+#include "ir_print_visitor.h"
+#include "program.h"
+#include "loop_analysis.h"
+#include "src/mesa/main/shaderobj.h"
+
+static void
+initialize_context(struct gl_context *ctx, gl_api api)
+{
+   memset(ctx, 0, sizeof(*ctx));
+
+   ctx->API = api;
+
+   ctx->Extensions.ARB_draw_buffers = GL_TRUE;
+   ctx->Extensions.ARB_fragment_coord_conventions = GL_TRUE;
+   ctx->Extensions.EXT_texture_array = GL_TRUE;
+   ctx->Extensions.NV_texture_rectangle = GL_TRUE;
+
+   /* 1.10 minimums. */
+   ctx->Const.MaxLights = 8;
+   ctx->Const.MaxClipPlanes = 8;
+   ctx->Const.MaxTextureUnits = 2;
+
+   /* More than the 1.10 minimum to appease parser tests taken from
+    * apps that (hopefully) already checked the number of coords.
+    */
+   ctx->Const.MaxTextureCoordUnits = 4;
+
+   ctx->Const.VertexProgram.MaxAttribs = 16;
+   ctx->Const.VertexProgram.MaxUniformComponents = 512;
+   ctx->Const.MaxVarying = 8;
+   ctx->Const.MaxVertexTextureImageUnits = 0;
+   ctx->Const.MaxCombinedTextureImageUnits = 2;
+   ctx->Const.MaxTextureImageUnits = 2;
+   ctx->Const.FragmentProgram.MaxUniformComponents = 64;
+
+   ctx->Const.MaxDrawBuffers = 2;
+}
+
+/* Returned string will have 'ctx' as its hieralloc owner. */
+static char *
+load_text_file(void *ctx, const char *file_name)
+{
+	char *text = NULL;
+	struct stat st;
+	ssize_t total_read = 0;
+	int fd = open(file_name, O_RDONLY);
+
+	if (fd < 0) {
+		return NULL;
+	}
+
+	if (fstat(fd, & st) == 0) {
+	   text = (char *) hieralloc_size(ctx, st.st_size + 1);
+		if (text != NULL) {
+			do {
+				ssize_t bytes = read(fd, text + total_read,
+						     st.st_size - total_read);
+				if (bytes < 0) {
+					free(text);
+					text = NULL;
+					break;
+				}
+
+				if (bytes == 0) {
+					break;
+				}
+
+				total_read += bytes;
+			} while (total_read < st.st_size);
+
+			text[total_read] = '\0';
+		}
+	}
+
+	close(fd);
+
+	return text;
+}
+
+int glsl_es = 0;
+int dump_ast = 0;
+int dump_hir = 0;
+int dump_lir = 0;
+int do_link = 0;
+
+const struct option compiler_opts[] = {
+   { "glsl-es",  0, &glsl_es,  1 },
+   { "dump-ast", 0, &dump_ast, 1 },
+   { "dump-hir", 0, &dump_hir, 1 },
+   { "dump-lir", 0, &dump_lir, 1 },
+   { "link",     0, &do_link,  1 },
+   { NULL, 0, NULL, 0 }
+};
+
+/**
+ * \brief Print proper usage and exit with failure.
+ */
+void
+usage_fail(const char *name)
+{
+
+   const char *header =
+      "usage: %s [options] <file.vert | file.geom | file.frag>\n"
+      "\n"
+      "Possible options are:\n";
+   printf(header, name, name);
+   for (const struct option *o = compiler_opts; o->name != 0; ++o) {
+      printf("    --%s\n", o->name);
+   }
+   exit(EXIT_FAILURE);
+}
+
+
+void
+compile_shader(struct gl_context *ctx, struct gl_shader *shader)
+{
+   struct _mesa_glsl_parse_state *state =
+      new(shader) _mesa_glsl_parse_state(ctx, shader->Type, shader);
+
+   const char *source = shader->Source;
+   state->error = preprocess(state, &source, &state->info_log,
+			     state->extensions, ctx->API);
+
+   if (!state->error) {
+      _mesa_glsl_lexer_ctor(state, source);
+      _mesa_glsl_parse(state);
+      _mesa_glsl_lexer_dtor(state);
+   }
+
+   if (dump_ast) {
+      foreach_list_const(n, &state->translation_unit) {
+	 ast_node *ast = exec_node_data(ast_node, n, link);
+	 ast->print();
+      }
+      printf("\n\n");
+   }
+
+   shader->ir = new(shader) exec_list;
+   if (!state->error && !state->translation_unit.is_empty())
+      _mesa_ast_to_hir(shader->ir, state);
+
+   /* Print out the unoptimized IR. */
+   if (!state->error && dump_hir) {
+      validate_ir_tree(shader->ir);
+      _mesa_print_ir(shader->ir, state);
+   }
+
+   /* Optimization passes */
+   if (!state->error && !shader->ir->is_empty()) {
+      bool progress;
+      do {
+	 progress = do_common_optimization(shader->ir, false, 32);
+      } while (progress);
+
+      validate_ir_tree(shader->ir);
+   }
+
+
+   /* Print out the resulting IR */
+   if (!state->error && dump_lir) {
+      _mesa_print_ir(shader->ir, state);
+   }
+
+   shader->symbols = state->symbols;
+   shader->CompileStatus = !state->error;
+   shader->Version = state->language_version;
+   memcpy(shader->builtins_to_link, state->builtins_to_link,
+	  sizeof(shader->builtins_to_link[0]) * state->num_builtins_to_link);
+   shader->num_builtins_to_link = state->num_builtins_to_link;
+
+   if (shader->InfoLog)
+      hieralloc_free(shader->InfoLog);
+
+   shader->InfoLog = state->info_log;
+
+   /* Retain any live IR, but trash the rest. */
+   reparent_ir(shader->ir, shader);
+
+   hieralloc_free(state);
+
+   return;
+}
+
+int
+main(int argc, char **argv)
+{
+   int status = EXIT_SUCCESS;
+   struct gl_context local_ctx;
+   struct gl_context *ctx = &local_ctx;
+
+   int c;
+   int idx = 0;
+   while ((c = getopt_long(argc, argv, "", compiler_opts, &idx)) != -1)
+      /* empty */ ;
+
+
+   if (argc <= optind)
+      usage_fail(argv[0]);
+
+   initialize_context(ctx, (glsl_es) ? API_OPENGLES2 : API_OPENGL);
+
+   struct gl_shader_program *whole_program;
+
+   whole_program = hieralloc_zero (NULL, struct gl_shader_program);
+   assert(whole_program != NULL);
+
+   for (/* empty */; argc > optind; optind++) {
+      whole_program->Shaders = (struct gl_shader **)
+	 hieralloc_realloc(whole_program, whole_program->Shaders,
+			struct gl_shader *, whole_program->NumShaders + 1);
+      assert(whole_program->Shaders != NULL);
+
+      struct gl_shader *shader = hieralloc_zero(whole_program, gl_shader);
+
+      whole_program->Shaders[whole_program->NumShaders] = shader;
+      whole_program->NumShaders++;
+
+      const unsigned len = strlen(argv[optind]);
+      if (len < 6)
+	 usage_fail(argv[0]);
+
+      const char *const ext = & argv[optind][len - 5];
+      if (strncmp(".vert", ext, 5) == 0)
+	 shader->Type = GL_VERTEX_SHADER;
+      else if (strncmp(".geom", ext, 5) == 0)
+	 shader->Type = GL_GEOMETRY_SHADER;
+      else if (strncmp(".frag", ext, 5) == 0)
+	 shader->Type = GL_FRAGMENT_SHADER;
+      else
+	 usage_fail(argv[0]);
+
+      shader->Source = load_text_file(whole_program, argv[optind]);
+      if (shader->Source == NULL) {
+	 printf("File \"%s\" does not exist.\n", argv[optind]);
+	 exit(EXIT_FAILURE);
+      }
+
+      compile_shader(ctx, shader);
+
+      if (!shader->CompileStatus) {
+	 printf("Info log for %s:\n%s\n", argv[optind], shader->InfoLog);
+	 status = EXIT_FAILURE;
+	 break;
+      }
+   }
+
+   if ((status == EXIT_SUCCESS) && do_link)  {
+      link_shaders(ctx, whole_program);
+      status = (whole_program->LinkStatus) ? EXIT_SUCCESS : EXIT_FAILURE;
+
+      if (strlen(whole_program->InfoLog) > 0)
+	 printf("Info log for linking:\n%s\n", whole_program->InfoLog);
+   }
+
+   for (unsigned i = 0; i < MESA_SHADER_TYPES; i++)
+      hieralloc_free(whole_program->_LinkedShaders[i]);
+
+   hieralloc_free(whole_program);
+   _mesa_glsl_release_types();
+   _mesa_glsl_release_functions();
+
+   return status;
+}
diff --git a/src/glsl/program.h b/src/glsl/program.h
index db602fa..ddae87e 100644
--- a/src/glsl/program.h
+++ b/src/glsl/program.h
@@ -24,4 +24,4 @@
 #include "main/core.h"
 
 extern void
-link_shaders(struct gl_context *ctx, struct gl_shader_program *prog);
+link_shaders(const struct gl_context *ctx, struct gl_shader_program *prog);