sqrt2.ll

; ModuleID = 'samples/sqrt2.dcs'
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-apple-darwin15.3.0"

@const.unit = private unnamed_addr constant {} zeroinitializer

; Function Attrs: inlinehint nounwind
define double @abs(double %n) #0 {
entry:
  %fcmpugttmp = fcmp ugt double %n, 0.000000e+00
  br i1 %fcmpugttmp, label %if.expr.then, label %if.expr.else

if.expr.then:                                     ; preds = %entry
  br label %if.expr.end

if.expr.else:                                     ; preds = %entry
  %fnegtmp = fsub double -0.000000e+00, %n
  br label %if.expr.end

if.expr.end:                                      ; preds = %if.expr.else, %if.expr.then
  %if.expr.phi = phi double [ %n, %if.expr.then ], [ %fnegtmp, %if.expr.else ]
  ret double %if.expr.phi
}

; Function Attrs: inlinehint nounwind
define double @sqrt2(double %p, double %z, double %x) #0 {
entry:
  %fsubtmp = fsub double %p, %z
  %0 = call double @abs(double %fsubtmp)
  %fcmpulttmp = fcmp ult double %0, 1.000000e-05
  br i1 %fcmpulttmp, label %postfixif.then, label %postfixif.end

postfixif.then:                                   ; preds = %entry
  ret double %z

postfixif.end:                                    ; preds = %entry
  %fmultmp = fmul double %z, %z
  %fsubtmp1 = fsub double %fmultmp, %x
  %fmultmp2 = fmul double 2.000000e+00, %z
  %fdivtmp = fdiv double %fsubtmp1, %fmultmp2
  %fsubtmp3 = fsub double %z, %fdivtmp
  %1 = call double @sqrt2(double %z, double %fsubtmp3, double %x)
  ret double %1
}

; Function Attrs: inlinehint nounwind
define double @sqrt(double %x) #0 {
entry:
  %0 = call double @sqrt2(double 0.000000e+00, double %x, double %x)
  ret double %0
}

attributes #0 = { inlinehint nounwind }