shithub: scc

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ref: 2b05b5d52482e818baf747bc8b0619fd0d26ca02
parent: a6692449e11bf9f40d051e0b8eb566bca72946ca
author: Roberto E. Vargas Caballero <[email protected]>
date: Thu Nov 4 03:54:49 EDT 2021 

cc2/qbe: Add complex()

The calculation of the complexity number can be factorized
and reuse it in different places of the code.


--- a/src/cmd/cc/cc2/target/qbe/cgen.c
+++ b/src/cmd/cc/cc2/target/qbe/cgen.c
@@ -98,6 +98,29 @@
 }
 
 static Node *
+complex(Node *np)
+{
+	Node *lp = np->left, *rp = np->right;
+
+	if (np->address > 10)
+		return np;
+	if (lp)
+		np->complex = lp->complex;
+	if (rp) {
+		int d = np->complex - rp->complex;
+
+		if (d == 0)
+			++np->complex;
+		else if (d < 0)
+			np->complex = rp->complex;
+	}
+	if (np->complex == 0)
+		++np->complex;
+
+	return np;
+}
+
+static Node *
 load(Type *tp, Node *np, Node *new)
 {
 	int op;
@@ -726,19 +749,5 @@
 	np->left = lp;
 	np->right = rp;
 
-	if (np->address > 10)
-		return np;
-	if (lp)
-		np->complex = lp->complex;
-	if (rp) {
-		int d = np->complex - rp->complex;
-
-		if (d == 0)
-			++np->complex;
-		else if (d < 0)
-			np->complex = rp->complex;
-	}
-	if (np->complex == 0)
-		++np->complex;
-	return np;
+	return complex(np);
 }