Adding some more internal-error messages where they were missing; fixed ast_ternary_c...

[xonotic/gmqcc.git] / ast.c

diff --git a/ast.c b/ast.c
index 41a4fa4f0b68f52f95f595887a4cc3ac128aef35..2a1446c739933813ebb4d96be94ff122b0bab6a1 100644 (file)
--- a/ast.c
+++ b/ast.c
@@ -696,6 +696,7 @@ void ast_ifthen_delete(ast_ifthen *self)
 
 ast_ternary* ast_ternary_new(lex_ctx ctx, ast_expression *cond, ast_expression *ontrue, ast_expression *onfalse)
 {
+    ast_expression *exprtype = ontrue;
     ast_instantiate(ast_ternary, ctx, ast_ternary_delete);
     /* This time NEITHER must be NULL */
     if (!ontrue || !onfalse) {
@@ -711,7 +712,9 @@ ast_ternary* ast_ternary_new(lex_ctx ctx, ast_expression *cond, ast_expression *
     ast_propagate_effects(self, ontrue);
     ast_propagate_effects(self, onfalse);
 
-    if (!ast_type_adopt(self, ontrue)) {
+    if (ontrue->expression.vtype == TYPE_NIL)
+        exprtype = onfalse;
+    if (!ast_type_adopt(self, exprtype)) {
         ast_ternary_delete(self);
         return NULL;
     }
@@ -2396,15 +2399,18 @@ bool ast_ternary_codegen(ast_ternary *self, ast_function *func, bool lvalue, ir_
     /* Here, now, we need a PHI node
      * but first some sanity checking...
      */
-    if (trueval->vtype != falseval->vtype) {
+    if (trueval->vtype != falseval->vtype && trueval->vtype != TYPE_NIL && falseval->vtype != TYPE_NIL) {
         /* error("ternary with different types on the two sides"); */
+        compile_error(ast_ctx(self), "internal error: ternary operand types invalid");
         return false;
     }
 
     /* create PHI */
-    phi = ir_block_create_phi(merge, ast_ctx(self), ast_function_label(func, "phi"), trueval->vtype);
-    if (!phi)
+    phi = ir_block_create_phi(merge, ast_ctx(self), ast_function_label(func, "phi"), self->expression.vtype);
+    if (!phi) {
+        compile_error(ast_ctx(self), "internal error: failed to generate phi node");
         return false;
+    }
     ir_phi_add(phi, ontrue_out,  trueval);
     ir_phi_add(phi, onfalse_out, falseval);