1! { dg-do compile }
2! { dg-options "-O1 -fno-signed-zeros -fno-trapping-math -fdump-tree-optimized" }
3! Fortran defaults to associative by default,
4! with -fno-signed-zeros -fno-trapping-math this should optimize away all additions
5SUBROUTINE S1(a)
6 REAL :: a
7 a=1+a-1
8END SUBROUTINE S1
9! { dg-final { scan-tree-dump-times " \\\+ " 0 "optimized" } }
10