[hackers] [scc/qbe] [cc2-qbe] Fix lhs() with OMEM or OAUTO || Roberto E. Vargas Caballero

[git]

commit fa3a69095e3c841ba8bfc3a099c66e8f0112e47b
Author:     Roberto E. Vargas Caballero <k...@shike2.com>
AuthorDate: Wed Aug 17 15:52:51 2016 +0200
Commit:     Roberto E. Vargas Caballero <k...@shike2.com>
CommitDate: Wed Aug 17 15:52:51 2016 +0200

    [cc2-qbe] Fix lhs() with OMEM or OAUTO
    
    Lhs() must put its return value in new, because callers expect that.

diff --git a/cc2/arch/qbe/cgen.c b/cc2/arch/qbe/cgen.c
index 3617e77..522e2ed 100644
--- a/cc2/arch/qbe/cgen.c
+++ b/cc2/arch/qbe/cgen.c
@@ -307,6 +307,7 @@ lhs(Node *np, Node *new)
        switch (np->op) {
        case OMEM:
        case OAUTO:
+               *new = *np;
                return np;
        case OPTR:
                return rhs(np->left, new);