ref: a30b9999606a95dfdc73c4ae0264c2fecdb992c0
parent: 025b7f7df0d8cd7577556a0a3e5d389c54996511
author: Roberto E. Vargas Caballero <k0ga@shike2.com>
date: Sat Jul 1 14:09:18 EDT 2017
[cc1] Rewrite null() Null() cannot simplify because it returns a boolean value, and it means that the parent of the current node hasn't a way to verify thet its child i sthe same after calling null(). This new version of the patch matches the tree for (void *) 0.Z
--- a/cc1/expr.c
+++ b/cc1/expr.c
@@ -120,10 +120,13 @@
static int
null(Node *np)
{- if (np->op == OCAST)
- np = simplify(np);
- if (!(np->flags&NCONST) || np->type != pvoidtype)
+ if (np->type != pvoidtype || np->op != OCAST)
return 0;
+
+ np = np->left;
+ if (np->type != inttype)
+ return 0;
+
return cmpnode(np, 0);
}