mark vectors as used when their members are used

[xonotic/gmqcc.git] / parser.c

diff --git a/parser.c b/parser.c
index bb41c7083412bcbac7839c80c538be25f9a13ffd..a9cc2e6ca871392672ce149dc7d648b0b33b5b92 100644 (file)
--- a/parser.c
+++ b/parser.c
@@ -88,17 +88,13 @@ typedef struct {
     qcint  memberof;
 } parser_t;
 
-#define CV_NONE 0
-#define CV_CONST 1
-#define CV_VAR -1
-
 static void parser_enterblock(parser_t *parser);
 static bool parser_leaveblock(parser_t *parser);
 static void parser_addlocal(parser_t *parser, const char *name, ast_expression *e);
 static bool parse_typedef(parser_t *parser);
-static bool parse_variable(parser_t *parser, ast_block *localblock, bool nofields, int is_const_var, ast_value *cached_typedef);
-static ast_block* parse_block(parser_t *parser, bool warnreturn);
-static bool parse_block_into(parser_t *parser, ast_block *block, bool warnreturn);
+static bool parse_variable(parser_t *parser, ast_block *localblock, bool nofields, int qualifier, ast_value *cached_typedef);
+static ast_block* parse_block(parser_t *parser);
+static bool parse_block_into(parser_t *parser, ast_block *block);
 static ast_expression* parse_statement_or_block(parser_t *parser);
 static bool parse_statement(parser_t *parser, ast_block *block, ast_expression **out, bool allow_cases);
 static ast_expression* parse_expression_leave(parser_t *parser, bool stopatcomma);
@@ -221,7 +217,7 @@ static ast_value* parser_const_float(parser_t *parser, double d)
             return parser->imm_float[i];
     }
     out = ast_value_new(parser_ctx(parser), "#IMMEDIATE", TYPE_FLOAT);
-    out->constant = true;
+    out->cvq      = CV_CONST;
     out->hasvalue = true;
     out->constval.vfloat = d;
     vec_push(parser->imm_float, out);
@@ -267,7 +263,7 @@ static ast_value* parser_const_string(parser_t *parser, const char *str, bool do
         out = ast_value_new(parser_ctx(parser), name, TYPE_STRING);
     } else
         out = ast_value_new(parser_ctx(parser), "#IMMEDIATE", TYPE_STRING);
-    out->constant = true;
+    out->cvq      = CV_CONST;
     out->hasvalue = true;
     out->constval.vstring = parser_strdup(str);
     vec_push(parser->imm_string, out);
@@ -283,7 +279,7 @@ static ast_value* parser_const_vector(parser_t *parser, vector v)
             return parser->imm_vector[i];
     }
     out = ast_value_new(parser_ctx(parser), "#IMMEDIATE", TYPE_VECTOR);
-    out->constant = true;
+    out->cvq      = CV_CONST;
     out->hasvalue = true;
     out->constval.vvec = v;
     vec_push(parser->imm_vector, out);
@@ -531,7 +527,7 @@ static bool parser_sy_pop(parser_t *parser, shunt *sy)
              (exprs[0]->expression.vtype != exprs[1]->expression.vtype || \
               exprs[0]->expression.vtype != T)
 #define CanConstFold1(A) \
-             (ast_istype((A), ast_value) && ((ast_value*)(A))->hasvalue && ((ast_value*)(A))->constant)
+             (ast_istype((A), ast_value) && ((ast_value*)(A))->hasvalue && (((ast_value*)(A))->cvq == CV_CONST))
 #define CanConstFold(A, B) \
              (CanConstFold1(A) && CanConstFold1(B))
 #define ConstV(i) (asvalue[(i)]->constval.vvec)
@@ -848,7 +844,7 @@ static bool parser_sy_pop(parser_t *parser, shunt *sy)
             if (exprs[1]->expression.vtype != exprs[2]->expression.vtype) {
                 ast_type_to_string(exprs[1], ty1, sizeof(ty1));
                 ast_type_to_string(exprs[2], ty2, sizeof(ty2));
-                parseerror(parser, "iperands of ternary expression must have the same type, got %s and %s", ty1, ty2);
+                parseerror(parser, "operands of ternary expression must have the same type, got %s and %s", ty1, ty2);
                 return false;
             }
             if (CanConstFold1(exprs[0]))
@@ -954,7 +950,7 @@ static bool parser_sy_pop(parser_t *parser, shunt *sy)
                         parseerror(parser, "invalid types in assignment: cannot assign %s to %s", ty2, ty1);
                 }
             }
-            if (ast_istype(exprs[0], ast_value) && asvalue[0]->constant) {
+            if (ast_istype(exprs[0], ast_value) && asvalue[0]->cvq == CV_CONST) {
                 parseerror(parser, "assignment to constant `%s`", asvalue[0]->name);
             }
             out = (ast_expression*)ast_store_new(ctx, assignop, exprs[0], exprs[1]);
@@ -971,7 +967,7 @@ static bool parser_sy_pop(parser_t *parser, shunt *sy)
                 addop = INSTR_ADD_F;
             else
                 addop = INSTR_SUB_F;
-            if (ast_istype(exprs[0], ast_value) && asvalue[0]->constant) {
+            if (ast_istype(exprs[0], ast_value) && asvalue[0]->cvq == CV_CONST) {
                 parseerror(parser, "assignment to constant `%s`", asvalue[0]->name);
             }
             if (ast_istype(exprs[0], ast_entfield)) {
@@ -999,7 +995,7 @@ static bool parser_sy_pop(parser_t *parser, shunt *sy)
                 addop = INSTR_SUB_F;
                 subop = INSTR_ADD_F;
             }
-            if (ast_istype(exprs[0], ast_value) && asvalue[0]->constant) {
+            if (ast_istype(exprs[0], ast_value) && asvalue[0]->cvq == CV_CONST) {
                 parseerror(parser, "assignment to constant `%s`", asvalue[0]->name);
             }
             if (ast_istype(exprs[0], ast_entfield)) {
@@ -1028,7 +1024,7 @@ static bool parser_sy_pop(parser_t *parser, shunt *sy)
                            ty1, ty2);
                 return false;
             }
-            if (ast_istype(exprs[0], ast_value) && asvalue[0]->constant) {
+            if (ast_istype(exprs[0], ast_value) && asvalue[0]->cvq == CV_CONST) {
                 parseerror(parser, "assignment to constant `%s`", asvalue[0]->name);
             }
             if (ast_istype(exprs[0], ast_entfield))
@@ -1065,7 +1061,7 @@ static bool parser_sy_pop(parser_t *parser, shunt *sy)
                            ty1, ty2);
                 return false;
             }
-            if (ast_istype(exprs[0], ast_value) && asvalue[0]->constant) {
+            if (ast_istype(exprs[0], ast_value) && asvalue[0]->cvq == CV_CONST) {
                 parseerror(parser, "assignment to constant `%s`", asvalue[0]->name);
             }
             if (ast_istype(exprs[0], ast_entfield))
@@ -1109,7 +1105,7 @@ static bool parser_sy_pop(parser_t *parser, shunt *sy)
                            ty1, ty2);
                 return false;
             }
-            if (ast_istype(exprs[0], ast_value) && asvalue[0]->constant) {
+            if (ast_istype(exprs[0], ast_value) && asvalue[0]->cvq == CV_CONST) {
                 parseerror(parser, "assignment to constant `%s`", asvalue[0]->name);
             }
             if (ast_istype(exprs[0], ast_entfield))
@@ -1139,7 +1135,7 @@ static bool parser_sy_pop(parser_t *parser, shunt *sy)
             out = (ast_expression*)ast_binary_new(ctx, INSTR_BITAND, exprs[0], exprs[1]);
             if (!out)
                 return false;
-            if (ast_istype(exprs[0], ast_value) && asvalue[0]->constant) {
+            if (ast_istype(exprs[0], ast_value) && asvalue[0]->cvq == CV_CONST) {
                 parseerror(parser, "assignment to constant `%s`", asvalue[0]->name);
             }
             asbinstore = ast_binstore_new(ctx, assignop, INSTR_SUB_F, exprs[0], out);
@@ -1416,8 +1412,14 @@ static ast_expression* parse_expression_leave(parser_t *parser, bool stopatcomma
                 parseerror(parser, "unexpected ident: %s", parser_tokval(parser));
                 goto onerr;
             }
-            if (ast_istype(var, ast_value))
+            if (ast_istype(var, ast_value)) {
                 ((ast_value*)var)->uses++;
+            }
+            else if (ast_istype(var, ast_member)) {
+                ast_member *mem = (ast_member*)var;
+                if (ast_istype(mem->owner, ast_value))
+                    ((ast_value*)(mem->owner))->uses++;
+            }
             vec_push(sy.out, syexp(parser_ctx(parser), var));
             DEBUGSHUNTDO(con_out("push %s\n", parser_tokval(parser)));
         }
@@ -2166,7 +2168,7 @@ static bool parse_switch(parser_t *parser, ast_block *block, ast_expression **ou
             }
             if (!OPTS_FLAG(RELAXED_SWITCH)) {
                 opval = (ast_value*)swcase.value;
-                if (!ast_istype(swcase.value, ast_value)) { /* || !opval->constant) { */
+                if (!ast_istype(swcase.value, ast_value)) { /* || opval->cvq != CV_CONST) { */
                     parseerror(parser, "case on non-constant values need to be explicitly enabled via -frelaxed-switch");
                     ast_unref(operand);
                     return false;
@@ -2426,7 +2428,7 @@ ident_var:
     else if (parser->tok == '{')
     {
         ast_block *inner;
-        inner = parse_block(parser, false);
+        inner = parse_block(parser);
         if (!inner)
             return false;
         *out = (ast_expression*)inner;
@@ -2484,7 +2486,7 @@ ident_var:
     }
 }
 
-static bool parse_block_into(parser_t *parser, ast_block *block, bool warnreturn)
+static bool parse_block_into(parser_t *parser, ast_block *block)
 {
     bool   retval = true;
 
@@ -2514,17 +2516,6 @@ static bool parse_block_into(parser_t *parser, ast_block *block, bool warnreturn
     if (parser->tok != '}') {
         block = NULL;
     } else {
-        if (warnreturn && parser->function->vtype->expression.next->expression.vtype != TYPE_VOID)
-        {
-            if (!vec_size(block->exprs) ||
-                !ast_istype(vec_last(block->exprs), ast_return))
-            {
-                if (parsewarning(parser, WARN_MISSING_RETURN_VALUES, "control reaches end of non-void function")) {
-                    block = NULL;
-                    goto cleanup;
-                }
-            }
-        }
         (void)parser_next(parser);
     }
 
@@ -2534,13 +2525,13 @@ cleanup:
     return retval && !!block;
 }
 
-static ast_block* parse_block(parser_t *parser, bool warnreturn)
+static ast_block* parse_block(parser_t *parser)
 {
     ast_block *block;
     block = ast_block_new(parser_ctx(parser));
     if (!block)
         return NULL;
-    if (!parse_block_into(parser, block, warnreturn)) {
+    if (!parse_block_into(parser, block)) {
         ast_block_delete(block);
         return NULL;
     }
@@ -2551,7 +2542,7 @@ static ast_expression* parse_statement_or_block(parser_t *parser)
 {
     ast_expression *expr = NULL;
     if (parser->tok == '{')
-        return (ast_expression*)parse_block(parser, false);
+        return (ast_expression*)parse_block(parser);
     if (!parse_statement(parser, NULL, &expr, false))
         return NULL;
     return expr;
@@ -2833,7 +2824,7 @@ static bool parse_function_body(parser_t *parser, ast_value *var)
     vec_push(parser->functions, func);
 
     parser->function = func;
-    if (!parse_block_into(parser, block, true)) {
+    if (!parse_block_into(parser, block)) {
         ast_block_delete(block);
         goto enderrfn;
     }
@@ -3577,7 +3568,7 @@ static bool parse_typedef(parser_t *parser)
     return true;
 }
 
-static bool parse_variable(parser_t *parser, ast_block *localblock, bool nofields, int is_const_var, ast_value *cached_typedef)
+static bool parse_variable(parser_t *parser, ast_block *localblock, bool nofields, int qualifier, ast_value *cached_typedef)
 {
     ast_value *var;
     ast_value *proto;
@@ -3640,8 +3631,7 @@ static bool parse_variable(parser_t *parser, ast_block *localblock, bool nofield
             }
         }
 
-        if (is_const_var == CV_CONST)
-            var->constant = true;
+        var->cvq = qualifier;
 
         /* Part 1:
          * check for validity: (end_sys_..., multiple-definitions, prototypes, ...)
@@ -3987,6 +3977,9 @@ skipvar:
                 break;
             }
 
+            if (proto)
+                ast_ctx(proto) = parser_ctx(parser);
+
             if (!parse_function_body(parser, var))
                 break;
             ast_delete(basetype);
@@ -4005,15 +3998,15 @@ skipvar:
 
             if (!localblock) {
                 cval = (ast_value*)cexp;
-                if (!ast_istype(cval, ast_value) || !cval->hasvalue || !cval->constant)
+                if (!ast_istype(cval, ast_value) || !cval->hasvalue || cval->cvq != CV_CONST)
                     parseerror(parser, "cannot initialize a global constant variable with a non-constant expression");
                 else
                 {
                     if (opts_standard != COMPILER_GMQCC &&
                         !OPTS_FLAG(INITIALIZED_NONCONSTANTS) &&
-                        is_const_var != CV_VAR)
+                        qualifier != CV_VAR)
                     {
-                        var->constant = true;
+                        var->cvq = CV_CONST;
                     }
                     var->hasvalue = true;
                     if (cval->expression.vtype == TYPE_STRING)
@@ -4025,8 +4018,8 @@ skipvar:
             } else {
                 bool cvq;
                 shunt sy = { NULL, NULL };
-                cvq = var->constant;
-                var->constant = false;
+                cvq = var->cvq;
+                var->cvq = CV_NONE;
                 vec_push(sy.out, syexp(ast_ctx(var), (ast_expression*)var));
                 vec_push(sy.out, syexp(ast_ctx(cexp), (ast_expression*)cexp));
                 vec_push(sy.ops, syop(ast_ctx(var), parser->assign_op));
@@ -4039,7 +4032,7 @@ skipvar:
                 }
                 vec_free(sy.out);
                 vec_free(sy.ops);
-                var->constant = cvq;
+                var->cvq = cvq;
             }
         }