--- /dev/null Sat Dec 14 13:56:51 2002 +++ gcc-3.3.1/gcc/testsuite/gcc.dg/pr11864-1.c Sun Sep 14 14:32:24 2003 @@ -0,0 +1,42 @@ +/* PR optimization/11864 + * Reporter: Kazumoto Kojima <kkojima@gcc.gnu.org> + * Summary: [3.3/3.4 regression] miscompiles zero extension and test + * Description: + * gcc-3.3/3.4 -O2 for sh target may miscompile the combination of zero extension + * and test if it's zero. + * + * Testcase tweaked by dank@kegel.com. Not marked as xfail because it's a regression. + */ +/* { dg-do run } */ +/* { dg-options "-O2" } */ + +extern void abort(void); + +int val = 0xff00; + +int f(void) +{ + return val; +} + +unsigned char a[1]; + +void foo(void) +{ + a[0] = f() & 255; + + if (!a[0]) + a[0] = f() & 255; + + if (!a[0]) + a[0] = 1 + (f() & 127); +} + +int main(int argc, char **argv) +{ + foo(); + if (!a[0]) + abort(); + + return 0; +}