scc

commit 30f27528f11cb62062805ee9d854c1011d0933cd
parent 13ce3ce2a3c0bd19452d9bdbe9669a62382a44a0
Author: Roberto E. Vargas Caballero <Roberto E. Vargas Caballero>
Date:   Sun,  8 May 2016 20:12:18 +0200

[cc2-qbe] Emit abbrev statements

Abbrev statements are the combination of a assignation
and some other operator, and they don't have special
meaning in QBE. They must be expanded.

Diffstat:
M
cc2/arch/qbe/cgen.c
 | 
15
+++++++++++++++

1 file changed, 15 insertions(+), 0 deletions(-)
diff --git a/cc2/arch/qbe/cgen.c b/cc2/arch/qbe/cgen.c
@@ -231,6 +231,20 @@ cast(Node *nd)
 	return nd;
 }
 
+static Node *
+abbrev(Node *np)
+{
+	Node *tmp;
+
+	if (np->u.subop == 0)
+		return np->right;
+	tmp = newnode(np->u.subop);
+	tmp->type = np->type;
+	tmp->right = np->right;
+	tmp->left = np->left;
+	return np->right = cgen(tmp);
+}
+
 Node *
 cgen(Node *np)
 {
@@ -317,6 +331,7 @@ cgen(Node *np)
 	case ODEC:
 		abort();
 	case OASSIG:
+		r = abbrev(np);
 		switch (tp->size) {
 		case 1:
 			op = ASSTB;