llvm/test/Transforms/LowerSwitch/pr59316.ll

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

define i64 @f(i1 %bool, i128 %i128) {
; CHECK-LABEL: @f(
; CHECK-NEXT:  BB:
; CHECK-NEXT:    br label [[NODEBLOCK1:%.*]]
; CHECK:       NodeBlock1:
; CHECK-NEXT:    [[PIVOT2:%.*]] = icmp slt i128 [[I128:%.*]], 16201310291018008446
; CHECK-NEXT:    br i1 [[PIVOT2]], label [[LEAFBLOCK:%.*]], label [[NODEBLOCK:%.*]]
; CHECK:       NodeBlock:
; CHECK-NEXT:    [[PIVOT:%.*]] = icmp slt i128 [[I128]], 16201310291018008447
; CHECK-NEXT:    br i1 [[PIVOT]], label [[SW_C3:%.*]], label [[SW_C2:%.*]]
; CHECK:       LeafBlock:
; CHECK-NEXT:    [[SWITCHLEAF:%.*]] = icmp eq i128 [[I128]], 16201310291018008445
; CHECK-NEXT:    br i1 [[SWITCHLEAF]], label [[SW_C4:%.*]], label [[SW_C1:%.*]]
; CHECK:       BB1:
; CHECK-NEXT:    unreachable
; CHECK:       SW_C1:
; CHECK-NEXT:    br i1 [[BOOL:%.*]], label [[BB1:%.*]], label [[SW_C1]]
; CHECK:       SW_C2:
; CHECK-NEXT:    ret i64 0
; CHECK:       SW_C3:
; CHECK-NEXT:    ret i64 1
; CHECK:       SW_C4:
; CHECK-NEXT:    ret i64 2
;
BB:
  switch i128 %i128, label %BB1 [
  i128 627, label %SW_C1
  i128 16201310291018008447, label %SW_C2
  i128 16201310291018008446, label %SW_C3
  i128 16201310291018008445, label %SW_C4
  ]

BB1:                                              ; preds = %SW_C1, %BB
  unreachable

SW_C1:                                            ; preds = %SW_C1, %BB
  br i1 %bool, label %BB1, label %SW_C1

SW_C2:                                            ; preds = %BB
  ret i64 0

SW_C3:                                            ; preds = %BB
  ret i64 1

SW_C4:                                            ; preds = %BB
  ret i64 2
}

define i64 @f_empty(i1 %bool, i128 %i128) {
; CHECK-LABEL: @f_empty(
; CHECK-NEXT:  BB:
; CHECK-NEXT:    br label [[BB1:%.*]]
; CHECK:       BB1:
; CHECK-NEXT:    unreachable
;
BB:
  switch i128 %i128, label %BB1 []

BB1:                                              ; preds = %BB
  unreachable
}

define void @f_i1() {
entry:
  switch i1 false, label %sw.bb [
    i1 false, label %sw.bb12
  ]

sw.bb:                                            ; preds = %entry
  unreachable

sw.bb12:                                          ; preds = %entry
  unreachable
}

define void @f_i2(i2 %cond) {
entry:
  switch i2 %cond, label %sw.bb [
    i2 0, label %sw.bb12
    i2 1, label %sw.bb12
    i2 2, label %sw.bb12
    i2 3, label %sw.bb12
  ]

sw.bb:                                            ; preds = %entry
  unreachable

sw.bb12:                                          ; preds = %entry
  unreachable
}