nir: add core helper functions

These include functions for adding and removing various bits of IR and
helpers for iterating over all the sources and destinations of an
instruction. This is similar to ir.cpp.

v2: Jason Ekstrand <jason.ekstrand@intel.com>:
   whitespace and automake fixes

src/glsl/Makefile.sources

@@ -14,9 +14,13 @@ LIBGLCPP_GENERATED_FILES = \
 	$(GLSL_BUILDDIR)/glcpp/glcpp-parse.c
 
 NIR_FILES = \
-        $(GLSL_SRCDIR)/nir/nir_intrinsics.c \
-        $(GLSL_SRCDIR)/nir/nir_opcodes.c \
-        $(GLSL_SRCDIR)/nir/nir_types.cpp
+	$(GLSL_SRCDIR)/nir/nir.c \
+	$(GLSL_SRCDIR)/nir/nir.h \
+	$(GLSL_SRCDIR)/nir/nir_intrinsics.c \
+	$(GLSL_SRCDIR)/nir/nir_intrinsics.h \
+	$(GLSL_SRCDIR)/nir/nir_opcodes.c \
+	$(GLSL_SRCDIR)/nir/nir_opcodes.h \
+	$(GLSL_SRCDIR)/nir/nir_types.cpp
 
 # libglsl
 

src/glsl/nir/nir.h

@@ -1145,6 +1145,99 @@ typedef struct nir_shader {
       foreach_list_typed(nir_function_overload, overload, node, \
                          &(func)->overload_list)
 
+nir_shader *nir_shader_create(void *mem_ctx);
+
+/** creates a register, including assigning it an index and adding it to the list */
+nir_register *nir_global_reg_create(nir_shader *shader);
+
+nir_register *nir_local_reg_create(nir_function_impl *impl);
+
+void nir_reg_remove(nir_register *reg);
+
+/** creates a function and adds it to the shader's list of functions */
+nir_function *nir_function_create(nir_shader *shader, const char *name);
+
+/** creates a null function returning null */
+nir_function_overload *nir_function_overload_create(nir_function *func);
+
+nir_function_impl *nir_function_impl_create(nir_function_overload *func);
+
+nir_block *nir_block_create(void *mem_ctx);
+nir_if *nir_if_create(void *mem_ctx);
+nir_loop *nir_loop_create(void *mem_ctx);
+
+nir_function_impl *nir_cf_node_get_function(nir_cf_node *node);
+
+/** puts a control flow node immediately after another control flow node */
+void nir_cf_node_insert_after(nir_cf_node *node, nir_cf_node *after);
+
+/** puts a control flow node immediately before another control flow node */
+void nir_cf_node_insert_before(nir_cf_node *node, nir_cf_node *before);
+
+/** puts a control flow node at the beginning of a list from an if, loop, or function */
+void nir_cf_node_insert_begin(struct exec_list *list, nir_cf_node *node);
+
+/** puts a control flow node at the end of a list from an if, loop, or function */
+void nir_cf_node_insert_end(struct exec_list *list, nir_cf_node *node);
+
+/** removes a control flow node, doing any cleanup necessary */
+void nir_cf_node_remove(nir_cf_node *node);
+
+/** creates an instruction with default swizzle/writemask/etc. with NULL registers */
+nir_alu_instr *nir_alu_instr_create(void *mem_ctx, nir_op op);
+
+nir_jump_instr *nir_jump_instr_create(void *mem_ctx, nir_jump_type type);
+
+nir_load_const_instr *nir_load_const_instr_create(void *mem_ctx);
+
+nir_intrinsic_instr *nir_intrinsic_instr_create(void *mem_ctx,
+                                                nir_intrinsic_op op);
+
+nir_call_instr *nir_call_instr_create(void *mem_ctx,
+                                      nir_function_overload *callee);
+
+nir_tex_instr *nir_tex_instr_create(void *mem_ctx, unsigned num_srcs);
+
+nir_phi_instr *nir_phi_instr_create(void *mem_ctx);
+
+nir_ssa_undef_instr *nir_ssa_undef_instr_create(void *mem_ctx);
+
+nir_deref_var *nir_deref_var_create(void *mem_ctx, nir_variable *var);
+nir_deref_array *nir_deref_array_create(void *mem_ctx);
+nir_deref_struct *nir_deref_struct_create(void *mem_ctx, const char *field);
+
+nir_deref *nir_copy_deref(void *mem_ctx, nir_deref *deref);
+
+void nir_instr_insert_before(nir_instr *instr, nir_instr *before);
+void nir_instr_insert_after(nir_instr *instr, nir_instr *after);
+
+void nir_instr_insert_before_block(nir_block *block, nir_instr *before);
+void nir_instr_insert_after_block(nir_block *block, nir_instr *after);
+
+void nir_instr_insert_before_cf(nir_cf_node *node, nir_instr *before);
+void nir_instr_insert_after_cf(nir_cf_node *node, nir_instr *after);
+
+void nir_instr_insert_before_cf_list(struct exec_list *list, nir_instr *before);
+void nir_instr_insert_after_cf_list(struct exec_list *list, nir_instr *after);
+
+void nir_instr_remove(nir_instr *instr);
+
+typedef bool (*nir_foreach_dest_cb)(nir_dest *dest, void *state);
+typedef bool (*nir_foreach_src_cb)(nir_src *src, void *state);
+bool nir_foreach_dest(nir_instr *instr, nir_foreach_dest_cb cb, void *state);
+bool nir_foreach_src(nir_instr *instr, nir_foreach_src_cb cb, void *state);
+
+/* visits basic blocks in source-code order */
+typedef bool (*nir_foreach_block_cb)(nir_block *block, void *state);
+bool nir_foreach_block(nir_function_impl *impl, nir_foreach_block_cb cb,
+                       void *state);
+
+void nir_index_local_regs(nir_function_impl *impl);
+void nir_index_global_regs(nir_shader *shader);
+void nir_index_ssa_defs(nir_function_impl *impl);
+
+void nir_index_blocks(nir_function_impl *impl);
+
 #ifdef __cplusplus
 } /* extern "C" */
 #endif