test/Transforms/ConstraintElimination/decompose-with-temporary-indices.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -passes=constraint-elimination -S %s | FileCheck %s

declare void @use(i1)


define i1 @test_uge_temporary_indices_decompose(i8 %start, i8 %n, i8 %idx) {
; CHECK-LABEL: @test_uge_temporary_indices_decompose(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[CMP_PRE:%.*]] = icmp ult i8 [[IDX:%.*]], [[N:%.*]]
; CHECK-NEXT:    [[START_ADD_IDX:%.*]] = add nuw nsw i8 [[START:%.*]], [[IDX]]
; CHECK-NEXT:    [[START_ADD_N:%.*]] = add nuw nsw i8 [[START]], [[N]]
; CHECK-NEXT:    [[START_ADD_1:%.*]] = add nuw nsw i8 [[START]], 1
; CHECK-NEXT:    br i1 [[CMP_PRE]], label [[IF_THEN:%.*]], label [[IF_END:%.*]]
; CHECK:       if.then:
; CHECK-NEXT:    [[R_1:%.*]] = xor i1 true, false
; CHECK-NEXT:    [[C_1:%.*]] = icmp ult i8 [[START_ADD_1]], [[START_ADD_N]]
; CHECK-NEXT:    [[R_2:%.*]] = xor i1 [[R_1]], [[C_1]]
; CHECK-NEXT:    [[C_2:%.*]] = icmp ult i8 [[START_ADD_IDX]], [[START_ADD_1]]
; CHECK-NEXT:    [[R_3:%.*]] = xor i1 [[R_2]], [[C_2]]
; CHECK-NEXT:    ret i1 [[R_3]]
; CHECK:       if.end:
; CHECK-NEXT:    [[R_4:%.*]] = xor i1 false, true
; CHECK-NEXT:    [[C_3:%.*]] = icmp ult i8 [[START_ADD_1]], [[START_ADD_N]]
; CHECK-NEXT:    [[R_5:%.*]] = xor i1 [[R_4]], [[C_3]]
; CHECK-NEXT:    [[C_4:%.*]] = icmp ult i8 [[START_ADD_IDX]], [[START_ADD_1]]
; CHECK-NEXT:    [[R_6:%.*]] = xor i1 [[R_5]], [[C_4]]
; CHECK-NEXT:    ret i1 [[R_6]]
;
entry:
  %cmp.pre = icmp ult i8 %idx, %n
  %start.add.idx = add nuw nsw i8 %start, %idx
  %start.add.n = add nuw nsw i8 %start, %n
  %start.add.1 = add nuw nsw i8 %start, 1
  br i1 %cmp.pre, label %if.then, label %if.end

if.then:                                          ; preds = %entry
  %t.0 = icmp ult i8 %start.add.idx, %start.add.n
  %f.0 = icmp uge i8 %start.add.idx, %start.add.n
  %r.1 = xor i1 %t.0, %f.0

  %c.1 = icmp ult i8 %start.add.1, %start.add.n
  %r.2 = xor i1 %r.1, %c.1

  %c.2 = icmp ult i8 %start.add.idx, %start.add.1
  %r.3 = xor i1 %r.2, %c.2
  ret i1 %r.3


if.end:                                           ; preds = %entry
  %f.1 = icmp ult i8 %start.add.idx, %start.add.n
  %t.1 = icmp uge i8 %start.add.idx, %start.add.n
  %r.4 = xor i1 %f.1, %t.1

  %c.3 = icmp ult i8 %start.add.1, %start.add.n
  %r.5 = xor i1 %r.4, %c.3

  %c.4 = icmp ult i8 %start.add.idx, %start.add.1
  %r.6 = xor i1 %r.5, %c.4

  ret i1 %r.6
}