[hackers] [scc/qbe] [cc2-qbe] Add support for logic negation operator || Roberto E. Vargas Caballero

[git]

commit 6a1d5b045462b11e22110e26b220c9ab76e2958c
Author:     Roberto E. Vargas Caballero <k...@shike2.com>
AuthorDate: Fri Aug 12 14:47:36 2016 +0200
Commit:     Roberto E. Vargas Caballero <k...@shike2.com>
CommitDate: Fri Aug 12 14:47:36 2016 +0200

    [cc2-qbe] Add support for logic negation operator
    
    This operator is very easy because we only have
    to change what is the true and what is the false.

diff --git a/cc2/arch/qbe/cgen.c b/cc2/arch/qbe/cgen.c
index f06b9db..e03609c 100644
--- a/cc2/arch/qbe/cgen.c
+++ b/cc2/arch/qbe/cgen.c
@@ -187,6 +187,9 @@ bool(Node *np, Symbol *true, Symbol *false)
        Symbol *label;
 
        switch (np->op) {
+       case ONEG:
+               bool(l, false, true);
+               break;
        case OAND:
                label = newlabel();
                bool(l, label, true);
@@ -255,6 +258,7 @@ rhs(Node *np, Node *ret)
        case OMEM:
        case OAUTO:
                return load(np, ret);
+       case ONEG:
        case OAND:
        case OOR:
                true = newlabel();