scc

commit f3c4d6c3e0822ccf373935eb8851660bbd298931
parent 46588de4ca1b0a4c47591d61c5947dc1a3238ce5
Author: Roberto E. Vargas Caballero <k0ga@shike2.net>
Date:   Tue, 10 Feb 2026 11:00:03 +0100

cc2: Preserve labels in replace()

The intention of replace is replacing a node with other, but in
case the original node had a label it was lost in the replace
process.

Diffstat:
M
src/cmd/scc-cc/cc2/sethi.c
 | 
4
++++
A
tests/cc/execute/0242-ternary.c
 | 
9
+++++++++
M
tests/cc/execute/scc-tests.lst
 | 
1
+

3 files changed, 14 insertions(+), 0 deletions(-)
diff --git a/src/cmd/scc-cc/cc2/sethi.c b/src/cmd/scc-cc/cc2/sethi.c
@@ -140,11 +140,15 @@ static Node *
 replace(Node *what, Node *with)
 {
 	Node *prev, *next;
+	Symbol *label;
 
+	label = what->label;
 	next = what->next, prev = what->prev;
+
 	*what = *with;
 	delnode(with);
 	what->next = next, what->prev = prev;
+	what->label = label;
 
 	return sethi(what);
 }
diff --git a/tests/cc/execute/0242-ternary.c b/tests/cc/execute/0242-ternary.c
@@ -0,0 +1,9 @@
+int but, aclick;
+
+int
+main(void)
+{
+	if (aclick == 1 && but)
+		(but == 1) ? 0 : 1;
+	return 0;
+}
diff --git a/tests/cc/execute/scc-tests.lst b/tests/cc/execute/scc-tests.lst
@@ -232,3 +232,4 @@
 0239-fcasts.c
 0240-init.c
 0241-init.c
+0242-ternary.c