Move stand-alone compiler main routine to main.cpp

1 files changed, 175 insertions, 0 deletions

diff --git a/main.cpp b/main.cpp
new file mode 100644
index 0000000000..12fb70315c
--- /dev/null
+++ b/main.cpp
@@ -0,0 +1,175 @@
+/*
+ * 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 <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 "ir_reader.h"
+
+
+static char *
+load_text_file(const char *file_name, size_t *size)
+{
+	char *text = NULL;
+	struct stat st;
+	ssize_t total_read = 0;
+	int fd = open(file_name, O_RDONLY);
+
+	*size = 0;
+	if (fd < 0) {
+		return NULL;
+	}
+
+	if (fstat(fd, & st) == 0) {
+	   text = (char *) malloc(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';
+			*size = total_read;
+		}
+	}
+
+	close(fd);
+
+	return text;
+}
+
+
+int
+main(int argc, char **argv)
+{
+   struct _mesa_glsl_parse_state state;
+   char *shader;
+   size_t shader_len;
+   exec_list instructions;
+
+   if (argc < 3) {
+      printf("Usage: %s [v|g|f|i] <shader_file>\n", argv[0]);
+      return EXIT_FAILURE;
+   }
+
+   memset(& state, 0, sizeof(state));
+
+   switch (argv[1][0]) {
+   case 'v':
+      state.target = vertex_shader;
+      break;
+   case 'g':
+      state.target = geometry_shader;
+      break;
+   case 'f':
+      state.target = fragment_shader;
+      break;
+   case 'i':
+      state.target = ir_shader;
+      break;
+   default:
+      printf("Usage: %s [v|g|f|i] <shader_file>\n", argv[0]);
+      return EXIT_FAILURE;
+   }
+
+   shader = load_text_file(argv[2], & shader_len);
+
+   state.scanner = NULL;
+   state.translation_unit.make_empty();
+   state.symbols = new glsl_symbol_table;
+   state.error = false;
+   state.temp_index = 0;
+   state.loop_or_switch_nesting = NULL;
+   state.ARB_texture_rectangle_enable = true;
+
+   if (state.target != ir_shader) {
+      _mesa_glsl_lexer_ctor(& state, shader, shader_len);
+      _mesa_glsl_parse(& state);
+      _mesa_glsl_lexer_dtor(& state);
+
+      foreach_list_const(n, &state.translation_unit) {
+	 ast_node *ast = exec_node_data(ast_node, n, link);
+	 ast->print();
+      }
+
+      if (!state.error && !state.translation_unit.is_empty())
+	 _mesa_ast_to_hir(&instructions, &state);
+   } else {
+      /* FINISHME: We should initialize this to the max GLSL version supported
+       * FINISHME: by the driver.  At the moment, we don't know what that is.
+       */
+      state.language_version = 130;
+      _mesa_glsl_initialize_types(&state);
+
+      _mesa_glsl_read_ir(&state, &instructions, shader);
+   }
+
+   /* Optimization passes */
+   if (!state.error && !instructions.is_empty()) {
+      bool progress;
+      do {
+	 progress = false;
+
+	 progress = do_function_inlining(&instructions) || progress;
+	 progress = do_if_simplification(&instructions) || progress;
+	 progress = do_copy_propagation(&instructions) || progress;
+	 progress = do_dead_code_local(&instructions) || progress;
+	 progress = do_dead_code_unlinked(&instructions) || progress;
+	 progress = do_constant_variable_unlinked(&instructions) || progress;
+	 progress = do_constant_folding(&instructions) || progress;
+	 progress = do_vec_index_to_swizzle(&instructions) || progress;
+	 progress = do_swizzle_swizzle(&instructions) || progress;
+      } while (progress);
+   }
+
+   /* Print out the resulting IR */
+   printf("\n\n");
+
+   if (!state.error) {
+      _mesa_print_ir(&instructions, &state);
+   }
+
+   delete state.symbols;
+
+   return state.error != 0;
+}