Moved test/ref/cc65141011.c to test/val/cc65141011.c.

test/val/cc65141011.c

@@ -0,0 +1,59 @@
+/*
+  !!DESCRIPTION!! equality problem
+  !!ORIGIN!!      Testsuite
+  !!LICENCE!!     Public Domain
+*/
+
+/*
+    Different results, depending on whether constant is on left or right side.
+
+    The optimizer sometimes makes code that executes the right-side expression
+    as eight bits; but then, tests it against the left-side zero as 16 bits.
+    The high-byte is garbage; therefore, that test might, or might not, work.
+    It depends on the platform and the amount of optimization.
+
+    http://www.cc65.org/mailarchive/2014-10/11680.html
+    http://www.cc65.org/mailarchive/2014-10/11682.html
+    http://www.cc65.org/mailarchive/2014-10/11683.html
+*/
+
+#include <stdio.h>
+
+static unsigned char fails = 4;
+static unsigned char bad[3], good[3];
+
+int main(void)
+{
+    unsigned char joy_state = 0x7e;
+    unsigned a, b;
+
+    /* NOTE: It fails in only the printf() statements, the other stuff
+             below works! */
+    printf("bad: %u, ", 0 == (joy_state & 1) );
+    printf("good: %u\n", (joy_state & 1) == 0 );
+
+    sprintf(bad, "%u", 0 == (joy_state & 1) );
+    sprintf(good, "%u", (joy_state & 1) == 0 );
+
+    printf("bad: %u, ", bad[0] - '0' );
+    printf("good: %u\n", good[0] - '0' );
+
+    fails -= bad[0] - '0';
+    fails -= good[0] - '0';
+
+    if (0 == (joy_state & 1)) fails--;
+    if ((joy_state & 1) == 0) fails--;
+
+    printf("failures: %u\n", fails );
+
+    /* The above printf() returns a value with a zero high-byte.
+    ** Therefore, the next (broken) statement works (by accident).
+    */
+    a = 0 == (joy_state & 1);
+    b = (joy_state & 1) == 0;
+
+    printf("a: %u, ", a );
+    printf("b: %u\n", b );
+
+    return fails;
+}