sdcc-3.9.0 fork implementing GNU assembler syntax

This fork aims to provide better support for stm8-binutils

1 files changed, 48 insertions, 0 deletions

diff --git a/support/regression/tests/bug-2320.c b/support/regression/tests/bug-2320.c
new file mode 100644
index 0000000..d1ee50a
--- /dev/null
+++ b/support/regression/tests/bug-2320.c
@@ -0,0 +1,48 @@
+/*
+   bug-2320.c z80 codegen / regalloc interaction issue overwriting register h
+ */
+
+#include <testfwk.h>
+
+#pragma disable_warning 85
+
+void as(char *c1, const char *c2, unsigned int i)
+{
+	ASSERT(0);
+}
+
+extern void p(char *c,...)
+{
+	ASSERT(0);
+}
+
+#define a(x) ((x) == 0 ? as(#x, __FILE__, __LINE__):(void)0)
+
+#define BACKING_STORAGE_SIZE 8192
+char *buffer;
+#define buffer_size (BACKING_STORAGE_SIZE-2)
+unsigned buffer_p, buffer_len;
+char *buffer_gap;
+
+void buffer_invariants()
+{
+	a(buffer_len <= buffer_size);
+	a(buffer_p <= buffer_len);
+
+	if (buffer_gap != buffer + buffer_size - buffer_len + buffer_p) {
+		p("%04x + %04x - %04x + %04x = %04x, not %04x\n",
+		  buffer, buffer_size, buffer_len, buffer_p,
+		  buffer + buffer_size - buffer_len + buffer_p,
+		  buffer_gap);
+		a(buffer_gap == buffer + buffer_size - buffer_len + buffer_p);
+	}
+}
+
+void testBug(void)
+{
+	buffer = (unsigned char __xdata *)(0xa5a5);
+	buffer_len = 1;
+	buffer_p = 0;
+	buffer_gap = buffer + buffer_size - buffer_len + buffer_p;
+	buffer_invariants();
+}