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authorYamaArashi <shadow962@live.com>2016-01-06 01:47:28 -0800
committerYamaArashi <shadow962@live.com>2016-01-06 01:47:28 -0800
commitbe8b04496302184c6e8f04d6179f9c3afc50aeb6 (patch)
tree726e2468c0c07add773c0dbd86ab6386844259ae /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;
+}