sdcc-3.9.0 fork implementing GNU assembler syntax

This fork aims to provide better support for stm8-binutils

1 files changed, 33 insertions, 0 deletions

diff --git a/support/regression/tests/fetchoverlap.c b/support/regression/tests/fetchoverlap.c
new file mode 100644
index 0000000..5039b0a
--- /dev/null
+++ b/support/regression/tests/fetchoverlap.c
@@ -0,0 +1,33 @@
+/* Test to reproduce a bug in the z80 compiler where A is used as the
+   left and right of an operand.
+*/
+#include <testfwk.h>
+#include <string.h>
+
+/* In the previous bug, both *p and val in the compare operation were
+   assigned into A due to *p being packed for ACC use into A.
+*/
+int
+verifyBlock(char *p, char val, int len)
+{
+  while (len--) {
+    if (*p++ != val) {
+      return 0;
+    }
+  }
+  return 1;
+}
+
+void
+testOverlap(void)
+{
+  char buf[20];
+  memset(buf, 12, sizeof(buf));
+
+  buf[12] = 13;
+  ASSERT(!verifyBlock(buf, 12, sizeof(buf)));
+
+  buf[12] = 12;
+  ASSERT(verifyBlock(buf, 12, sizeof(buf)));
+}
+