test/Transforms/InstCombine/nonnull-select.ll

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

; Passing select(cond, null, v) as nonnull should be optimized to passing v

define nonnull ptr @pr48975(ptr %.0) {
; CHECK-LABEL: @pr48975(
; CHECK-NEXT:    [[DOT1:%.*]] = load ptr, ptr [[DOT0:%.*]], align 8
; CHECK-NEXT:    [[DOT2:%.*]] = icmp eq ptr [[DOT1]], null
; CHECK-NEXT:    [[DOT4:%.*]] = select i1 [[DOT2]], ptr null, ptr [[DOT0]]
; CHECK-NEXT:    ret ptr [[DOT4]]
;
  %.1 = load ptr, ptr %.0, align 8
  %.2 = icmp eq ptr %.1, null
  %.4 = select i1 %.2, ptr null, ptr %.0
  ret ptr %.4
}

define nonnull ptr @nonnull_ret(i1 %cond, ptr %p) {
; CHECK-LABEL: @nonnull_ret(
; CHECK-NEXT:    [[RES:%.*]] = select i1 [[COND:%.*]], ptr [[P:%.*]], ptr null
; CHECK-NEXT:    ret ptr [[RES]]
;
  %res = select i1 %cond, ptr %p, ptr null
  ret ptr %res
}

define nonnull ptr @nonnull_ret2(i1 %cond, ptr %p) {
; CHECK-LABEL: @nonnull_ret2(
; CHECK-NEXT:    [[RES:%.*]] = select i1 [[COND:%.*]], ptr null, ptr [[P:%.*]]
; CHECK-NEXT:    ret ptr [[RES]]
;
  %res = select i1 %cond, ptr null, ptr %p
  ret ptr %res
}

define nonnull noundef ptr @nonnull_noundef_ret(i1 %cond, ptr %p) {
; CHECK-LABEL: @nonnull_noundef_ret(
; CHECK-NEXT:    [[RES:%.*]] = select i1 [[COND:%.*]], ptr [[P:%.*]], ptr null
; CHECK-NEXT:    ret ptr [[RES]]
;
  %res = select i1 %cond, ptr %p, ptr null
  ret ptr %res
}

define nonnull noundef ptr @nonnull_noundef_ret2(i1 %cond, ptr %p) {
; CHECK-LABEL: @nonnull_noundef_ret2(
; CHECK-NEXT:    [[RES:%.*]] = select i1 [[COND:%.*]], ptr null, ptr [[P:%.*]]
; CHECK-NEXT:    ret ptr [[RES]]
;
  %res = select i1 %cond, ptr null, ptr %p
  ret ptr %res
}


define void @nonnull_call(i1 %cond, ptr %p) {
; CHECK-LABEL: @nonnull_call(
; CHECK-NEXT:    [[RES:%.*]] = select i1 [[COND:%.*]], ptr [[P:%.*]], ptr null
; CHECK-NEXT:    call void @f(ptr nonnull [[RES]])
; CHECK-NEXT:    ret void
;
  %res = select i1 %cond, ptr %p, ptr null
  call void @f(ptr nonnull %res)
  ret void
}

define void @nonnull_call2(i1 %cond, ptr %p) {
; CHECK-LABEL: @nonnull_call2(
; CHECK-NEXT:    [[RES:%.*]] = select i1 [[COND:%.*]], ptr null, ptr [[P:%.*]]
; CHECK-NEXT:    call void @f(ptr nonnull [[RES]])
; CHECK-NEXT:    ret void
;
  %res = select i1 %cond, ptr null, ptr %p
  call void @f(ptr nonnull %res)
  ret void
}

define void @nonnull_noundef_call(i1 %cond, ptr %p) {
; CHECK-LABEL: @nonnull_noundef_call(
; CHECK-NEXT:    [[RES:%.*]] = select i1 [[COND:%.*]], ptr [[P:%.*]], ptr null
; CHECK-NEXT:    call void @f(ptr noundef nonnull [[RES]])
; CHECK-NEXT:    ret void
;
  %res = select i1 %cond, ptr %p, ptr null
  call void @f(ptr nonnull noundef %res)
  ret void
}

define void @nonnull_noundef_call2(i1 %cond, ptr %p) {
; CHECK-LABEL: @nonnull_noundef_call2(
; CHECK-NEXT:    [[RES:%.*]] = select i1 [[COND:%.*]], ptr null, ptr [[P:%.*]]
; CHECK-NEXT:    call void @f(ptr noundef nonnull [[RES]])
; CHECK-NEXT:    ret void
;
  %res = select i1 %cond, ptr null, ptr %p
  call void @f(ptr nonnull noundef %res)
  ret void
}

declare void @f(ptr)