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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [gcc/] [testsuite/] [gcc.dg/] [pr11864-1.c] - Rev 305
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/* 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; }
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