; RUN: if [ %llvmver -lt 16 ]; then %opt < %s %loadEnzyme -enzyme-preopt=false -enzyme -mem2reg -sroa -instsimplify -early-cse -simplifycfg -S | FileCheck %s; fi
; RUN: %opt < %s %newLoadEnzyme -enzyme-preopt=false -passes="enzyme,function(mem2reg,sroa,instsimplify,early-cse,%simplifycfg)" -S | FileCheck %s

declare dso_local void @_Z17__enzyme_autodiffPvPdS0_i(i8*, double*, double*) local_unnamed_addr #4
define dso_local void @outer(double* %m, double* %m2) local_unnamed_addr #2 {
entry:
  call void @_Z17__enzyme_autodiffPvPdS0_i(i8* bitcast (void (double*)* @_Z10reduce_maxPdi to i8*), double* nonnull %m, double* nonnull %m2)
  ret void
}
; Function Attrs: nounwind uwtable
define dso_local void @_Z10reduce_maxPdi(double* %vec) #0 {
entry:
  %v = call double* @pb(double* %vec)
  call void @noop(double* %v)
  ret void
}

define double* @pb(double* %__x) {
entry:
  %a11 = call i64 @out(double* nonnull %__x)
  %a13 = call i64 @out(double* nonnull %__x)
  %sub = sub i64 %a11, %a13
  %s2 = add i64 %sub, 2
  %add.ptr.i = getelementptr inbounds double, double* %__x, i64 %s2
  call void @mid(double* %add.ptr.i)
  ret double* %__x
}

define void @mid(double* %mid) {
entry:
  %ld = load double, double* %mid, align 8
  %next = fadd double %ld, 1.000000e+00
  store double %next, double* %mid, align 8
  ret void
}

define i64 @out(double* %mid) {
entry:
  %int = ptrtoint double* %mid to i64
  ret i64 %int
}


define void @noop(double* %mid) {
entry:
  ret void
}


; CHECK: define internal void @diffe_Z10reduce_maxPdi(double* %vec, double* %"vec'")
; CHECK-NEXT: entry:
; CHECK-NEXT:   %v_augmented = call { i64, double* } @augmented_pb(double* %vec, double* %"vec'")
; CHECK-NEXT:   %subcache = extractvalue { i64, double* } %v_augmented, 0
; CHECK-NEXT:   %v = extractvalue { i64, double* } %v_augmented, 1
; CHECK-NEXT:   call void @nofree_noop(double* %v)
; CHECK-NEXT:   call void @diffepb(double* %vec, double* %"vec'", i64 %subcache)
; CHECK-NEXT:   ret void
; CHECK-NEXT: }

; CHECK: define internal void @augmented_mid(double* nocapture %mid, double* nocapture %"mid'")
; CHECK-NEXT: entry:
; CHECK-NEXT:   %ld = load double, double* %mid, align 8
; CHECK-NEXT:   %next = fadd double %ld, 1.000000e+00
; CHECK-NEXT:   store double %next, double* %mid, align 8
; CHECK-NEXT:   ret void
; CHECK-NEXT: }

; CHECK: define internal i64 @nofree_out(double* %mid)
; CHECK-NEXT: entry:
; CHECK-NEXT:   %int = ptrtoint double* %mid to i64
; CHECK-NEXT:   ret i64 %int
; CHECK-NEXT: }

; CHECK: define internal { i64, double* } @augmented_pb(double* %__x, double* %"__x'")
; CHECK-NEXT: entry:
; CHECK-NEXT:   %a11 = call i64 @nofree_out(double* nonnull %__x)
; CHECK-NEXT:   %a13 = call i64 @nofree_out(double* nonnull %__x)
; CHECK-NEXT:   %sub = sub i64 %a11, %a13
; CHECK-NEXT:   %s2 = add i64 %sub, 2
; CHECK-NEXT:   %"add.ptr.i'ipg" = getelementptr inbounds double, double* %"__x'", i64 %s2
; CHECK-NEXT:   %add.ptr.i = getelementptr inbounds double, double* %__x, i64 %s2
; CHECK-NEXT:   call void @augmented_mid(double* %add.ptr.i, double* %"add.ptr.i'ipg")
; CHECK-NEXT:   %.fca.0.insert = insertvalue { i64, double* } {{(undef|poison)}}, i64 %s2, 0
; CHECK-NEXT:   %.fca.1.insert = insertvalue { i64, double* } %.fca.0.insert, double* %__x, 1
; CHECK-NEXT:   ret { i64, double* } %.fca.1.insert
; CHECK-NEXT: }

; CHECK: define internal void @diffepb(double* %__x, double* %"__x'", i64 %s2)
; CHECK-NEXT: entry:
; CHECK-NEXT:   %"add.ptr.i'ipg" = getelementptr inbounds double, double* %"__x'", i64 %s2
; CHECK-NEXT:   %add.ptr.i = getelementptr inbounds double, double* %__x, i64 %s2
; CHECK-NEXT:   call void @diffemid(double* %add.ptr.i, double* %"add.ptr.i'ipg")
; CHECK-NEXT:   ret void
; CHECK-NEXT: }

; CHECK: define internal void @diffemid(double* nocapture %mid, double* nocapture %"mid'")
; CHECK-NEXT: entry:
; CHECK-NEXT:   %0 = load double, double* %"mid'", align 8
; CHECK-NEXT:   store double %0, double* %"mid'", align 8
; CHECK-NEXT:   ret void
; CHECK-NEXT: }
