1 files changed, 46 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.wendy/gnu18.c b/gcc/testsuite/gcc.wendy/gnu18.c
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+++ b/gcc/testsuite/gcc.wendy/gnu18.c
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+/*
+Date: Sat, 5 Sep 87 00:34:13 PDT
+From: gnu (John Gilmore)
+To: rms
+Subject: Stack adjustment bug in 'continue' -- gcc 1.10+
+
+Compiling the following simplified program with or without -O produces
+bad code.  The 'continue' compiles to a jump to a label which PRECEDES
+the stack adjust for the printf at the end of the loop.  This makes the
+stack pointer walk up each time around the loop.  If you compile without
+-O, "foo" gets allocated on the stack and the debug printf fires.
+Compiled with -O, it coredumps before printing.  Compiled on a working
+compiler, it loops forever.
+
+I have installed the bugfix for while loops posted to bug-gcc; it fails
+with or without the bugfix.
+*/
+
+int	tty;
+
+iscmd() {
+	static int counter;
+
+	if (counter++ < 10000) return 0;
+	printf("Test passed\n");
+	exit(0);
+}
+
+void
+main()
+{
+	int foo = 0;
+
+	for ( ;; ) {
+		if (foo != 0) printf("***BUG*** foo=%x\n", foo);
+		if (!tty) {
+			if (!iscmd ())
+				continue;
+			foo = 1;
+		}
+
+		printf("**BUG** Past iscmd\n");
+	}
+
+	return;
+}