From 66ff04322e80d14d9b1c8a4d1ef8cf63440242af Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Alejandro=20Pi=C3=B1eiro?= Date: Tue, 19 Apr 2016 11:17:27 +0200 Subject: glsl: do not raise uninitialized warning with out function parameters It silence by default warnings with function parameters, as the parameters need to be processed in order to have the actual and the formal parameter, and the function signature. Then it raises the warning if needed at verify_parameter_modes where other in/out/inout modes checks are done. v2: fix comment style, multi-line condition style, simplify check, remove extra blank (Ian Romanick) v3: inout function parameters can raise the warning too (Ian Romanick) Reviewed-by: Ian Romanick --- src/compiler/glsl/ast_function.cpp | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/src/compiler/glsl/ast_function.cpp b/src/compiler/glsl/ast_function.cpp index 4433fdd..a97e6c9 100644 --- a/src/compiler/glsl/ast_function.cpp +++ b/src/compiler/glsl/ast_function.cpp @@ -43,6 +43,12 @@ process_parameters(exec_list *instructions, exec_list *actual_parameters, unsigned count = 0; foreach_list_typed(ast_node, ast, link, parameters) { + /* We need to process the parameters first in order to know if we can + * raise or not a unitialized warning. Calling set_is_lhs silence the + * warning for now. Raising the warning or not will be checked at + * verify_parameter_modes. + */ + ast->set_is_lhs(true); ir_rvalue *result = ast->hir(instructions, state); ir_constant *const constant = result->constant_expression_value(); @@ -257,6 +263,16 @@ verify_parameter_modes(_mesa_glsl_parse_state *state, } ir_variable *var = actual->variable_referenced(); + + if (var && formal->data.mode == ir_var_function_inout) { + if ((var->data.mode == ir_var_auto || var->data.mode == ir_var_shader_out) && + !var->data.assigned && + !is_gl_identifier(var->name)) { + _mesa_glsl_warning(&loc, state, "`%s' used uninitialized", + var->name); + } + } + if (var) var->data.assigned = true; @@ -273,6 +289,18 @@ verify_parameter_modes(_mesa_glsl_parse_state *state, mode, formal->name); return false; } + } else { + assert(formal->data.mode == ir_var_function_in || + formal->data.mode == ir_var_const_in); + ir_variable *var = actual->variable_referenced(); + if (var) { + if ((var->data.mode == ir_var_auto || var->data.mode == ir_var_shader_out) && + !var->data.assigned && + !is_gl_identifier(var->name)) { + _mesa_glsl_warning(&loc, state, "`%s' used uninitialized", + var->name); + } + } } if (formal->type->is_image() && -- cgit v1.1