Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/gcc.dg/pr11864-1.c @ 131:84e7813d76e9
gcc-8.2
author | mir3636 |
---|---|
date | Thu, 25 Oct 2018 07:37:49 +0900 |
parents | 04ced10e8804 |
children |
line wrap: on
line source
/* 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; }