1 /* { dg-do compile } */ 2 /* { dg-options "-O -ffast-math -fdump-tree-reassoc1 -fdump-tree-optimized" } */ 3 foo(double a)4double foo(double a) 5 { 6 double tmp = 5.0; 7 double tmp2 = a + tmp; 8 tmp2 = tmp2 - a; 9 return a + tmp2 - 5.0; 10 } 11 12 /* { dg-final { scan-tree-dump-not "\\\+ 0.0" "reassoc1" } } */ 13 /* { dg-final { scan-tree-dump "return a_..D.;" "optimized" } } */ 14