diff options
| -rw-r--r-- | src/mesa/shader/slang/slang_codegen.c | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/src/mesa/shader/slang/slang_codegen.c b/src/mesa/shader/slang/slang_codegen.c index 8a6da16771c..b1f6db8ac36 100644 --- a/src/mesa/shader/slang/slang_codegen.c +++ b/src/mesa/shader/slang/slang_codegen.c @@ -2140,6 +2140,26 @@ _slang_gen_swizzle(slang_ir_node *child, GLuint swizzle) static slang_ir_node * _slang_gen_assignment(slang_assemble_ctx * A, slang_operation *oper) { + if (oper->children[0].type == SLANG_OPER_IDENTIFIER) { + /* Check that var is writeable */ + slang_variable *var + = _slang_locate_variable(oper->locals, + oper->children[0].a_id, GL_TRUE); + if (!var) { + slang_info_log_error(A->log, "undefined variable '%s'", + (char *) oper->children[0].a_id); + return NULL; + } + if (var->type.qualifier == SLANG_QUAL_CONST || + var->type.qualifier == SLANG_QUAL_ATTRIBUTE || + var->type.qualifier == SLANG_QUAL_UNIFORM) { + slang_info_log_error(A->log, + "illegal assignment to read-only variable '%s'", + (char *) oper->children[0].a_id); + return NULL; + } + } + if (oper->children[0].type == SLANG_OPER_IDENTIFIER && oper->children[1].type == SLANG_OPER_CALL) { /* Special case of: x = f(a, b) @@ -2164,7 +2184,8 @@ _slang_gen_assignment(slang_assemble_ctx * A, slang_operation *oper) lhs->Store->File != PROGRAM_TEMPORARY && lhs->Store->File != PROGRAM_VARYING && lhs->Store->File != PROGRAM_UNDEFINED) { - slang_info_log_error(A->log, "Assignment to read-only variable"); + slang_info_log_error(A->log, + "illegal assignment to read-only l-value"); return NULL; } } |