codeb: minimale 'IF expr THEN statseq END' implementierung

[uebersetzerbau-ss10.git] / codeb / parser.y

diff --git a/codeb/parser.y b/codeb/parser.y
index 014175549e545ec4e86f746d890e0c2137e4df2d..cda1e7bfcf500e6b653db7512b7b98c621338dd3 100644 (file)
--- a/codeb/parser.y
+++ b/codeb/parser.y
@@ -172,8 +172,17 @@ Statement:
                statinout()
                xxputsin(@Expr.s@,)
                xxputsin(@Statseq.s@,)
-           @i @Statement.node@ = TREENULL;
+
+               @i @Statement.node@ = new_node(O_IF, @Expr.node@, TREENULL);
                @i @Statement.vars@ = 0;
+
+               @reg @Statement.node@->reg = @Expr.node@->reg = next_reg((char *)NULL, @Expr.gparamges@);
+               @gen {
+                       write_tree(@Statement.node@, 0); burm_label(@Statement.node@); burm_reduce(@Statement.node@, 1);
+                       /* TODO: kann ich mir das test wirklich wegan and davor sparen? */
+                       printf("\ttest %s1, %%rax\n\tjz if_end\n", "$");
+               }
+               @gen @revorder(1) printf("if_end:\n");
          @}
 
        | IF Expr THEN Statseq ELSE Statseq END
@@ -199,6 +208,7 @@ Statement:
          @{
                statinout()
                xxputsin(@Expr.s@,)
+
                @i @Statement.vars@ = 0;
                @i @Statement.node@ = new_node(O_RET, @Expr.node@, TREENULL);
                @reg @Statement.node@->reg = @Expr.node@->reg = next_reg((char *)NULL, @Expr.gparamges@);