optimizer_bug.ll

; ModuleID = '<stdin>'

define void @main() nounwind {
  %r.1 = alloca double                            ; <double*> [#uses=3]
  store double 1.000000e+00, double* %r.1
  %r.9 = alloca double                            ; <double*> [#uses=3]
  store double 9.000000e+00, double* %r.9
  br label %loop

loop:                                             ; preds = %switch, %0
  %1 = call i32 @putchar(i8 72)                   ; <i32> [#uses=0]
  %tmp5 = load double* %r.9                       ; <double> [#uses=1]
  %tmp6 = load double* %r.1                       ; <double> [#uses=1]
  %tmp7 = fsub double %tmp5, %tmp6                ; <double> [#uses=2]
  store double %tmp7, double* %r.9
  %tmp9 = fcmp ult double %tmp7, 0.000000e+00     ; <i1> [#uses=1]
  br i1 %tmp9, label %exit, label %switch

switch:                                           ; preds = %loop
  %tmp10 = load double* %r.1                      ; <double> [#uses=1]
  %tmp11 = fptoui double %tmp10 to i32            ; <i32> [#uses=1]
  switch i32 %tmp11, label %exit [
    i32 1, label %loop
  ]

exit:                                             ; preds = %switch, %loop
  ret void
}

declare i32 @putchar(i8) nounwind