/* Check that eliminable compare-instructions are eliminated. */ /* { dg-do compile } */ /* { dg-options "-O2" } */ /* { dg-final { scan-assembler-not "\tcmp|\ttest" { xfail *-*-* } } } */ /* { dg-final { scan-assembler-not "\tnot" { xfail cc0 } } } */ /* { dg-final { scan-assembler-not "\tlsr" { xfail cc0 } } } */ int f(int a, int b, int *d) { int c = a - b; /* Whoops! We get a cmp.d with the original operands here. */ *d = (c == 0); /* Whoops! While we don't get a test.d for the result here for cc0, we get a sequence of insns: a move, a "not" and a shift of the subtraction-result, where a simple "spl" would have done. */ return c >= 0; }