1! Verify that`-O{n}` is indeed taken into account when defining the LLVM optimization/middle-end pass pipeline.
2
3! RUN: %flang -S -O0 %s -Xflang -fdebug-pass-manager -o /dev/null 2>&1 | FileCheck %s --check-prefix=CHECK-O0
4! RUN: %flang_fc1 -S -O0 %s -fdebug-pass-manager -o /dev/null 2>&1 | FileCheck %s --check-prefix=CHECK-O0
5
6! RUN: %flang -S -O2 %s -Xflang -fdebug-pass-manager -o /dev/null 2>&1 | FileCheck %s --check-prefix=CHECK-O2
7! RUN: %flang_fc1 -S -O2 %s -fdebug-pass-manager -o /dev/null 2>&1 | FileCheck %s --check-prefix=CHECK-O2
8
9! Verify that only the left-most `-O{n}` is used
10! RUN: %flang -S -O2 -O0 %s -Xflang -fdebug-pass-manager -o /dev/null 2>&1 | FileCheck %s --check-prefix=CHECK-O0
11! RUN: %flang_fc1 -S -O2 -O0 %s -fdebug-pass-manager -o /dev/null 2>&1 | FileCheck %s --check-prefix=CHECK-O0
12
13! CHECK-O0-NOT: Running pass: SimplifyCFGPass on simple_loop_
14! CHECK-O0: Running analysis: TargetLibraryAnalysis on simple_loop_
15
16! CHECK-O2: Running pass: SimplifyCFGPass on simple_loop_
17
18subroutine simple_loop
19  integer :: i
20  do i=1,5
21  end do
22end subroutine
23