third_party/llvm-project/polly/test/ForwardOpTree/noforward_sideffects.ll

; RUN: opt %loadPolly  -polly-optree -analyze < %s | FileCheck %s -match-full-lines
;
; Do not forward instructions with side-effects (here: function call).
;
; for (int j = 0; j < n; j += 1) {
; bodyA:
;   double val = f();
;
; bodyB:
;   A[0] = val;
; }
;
declare double @f(double* %A) #1

define void @func(i32 %n, double* noalias nonnull %A) {
entry:
  br label %for

for:
  %j = phi i32 [0, %entry], [%j.inc, %inc]
  %j.cmp = icmp slt i32 %j, %n
  br i1 %j.cmp, label %bodyA, label %exit

    bodyA:
      %val = call double (double*) @f(double* %A)
      br label %bodyB

    bodyB:
      store double %val, double* %A
      br label %inc

inc:
  %j.inc = add nuw nsw i32 %j, 1
  br label %for

exit:
  br label %return

return:
  ret void
}

attributes #1 = { nounwind readnone }


; CHECK: ForwardOpTree executed, but did not modify anything