1/* PR optimization/11210 */ 2/* Originator: Guido Classen <guido@clagi.de> */ 3/* Reduced testcase by Falk Hueffner <falk@debian.org> */ 4/* { dg-do compile } */ 5/* { dg-options "-O" } */ 6 7/* Verify that the constant expressions folder doesn't 8 throw away the cast operation in the comparison. */ 9 10struct str { 11 int head; 12 signed char data[8]; 13}; 14 15int foo(struct str t) 16{ 17 return t.data[0] || (unsigned char) t.data[2] != 130; /* { dg-bogus "comparison is always 1" } */ 18} 19