shithub: mc

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Put match values into temporary.

    We don't need to constantly recompute it.

--- a/6/simp.c

+++ b/6/simp.c

@@ -492,13 +492,16 @@

 static void simpmatch(Simp *s, Node *n)

 {

     Node *end, *cur, *next; /* labels */

-    Node *val;

+    Node *val, *tmp;

     Node *m;

     size_t i;

     f = stdout;

     end = genlbl();

-    val = rval(s, n->matchstmt.val, NULL); /* FIXME: don't recompute, even if pure */

+    val = temp(s, n->matchstmt.val);

+    tmp = rval(s, n->matchstmt.val, val);

+    if (val != tmp)

+        append(s, set(val, tmp));

     for (i = 0; i < n->matchstmt.nmatches; i++) {

         m = n->matchstmt.matches[i];

--- a/opt/df.c

+++ b/opt/df.c

@@ -15,5 +15,5 @@

 void flow(Cfg *cfg)

 {

-    die("Flow analysis not implemented");

 }

+