; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 6
; RUN: opt -aa-pipeline=basic-aa -passes='require<opt-remark-emit>,loop-mssa(licm)' -S %s | FileCheck %s
; RUN: opt -S -passes=licm -verify-memoryssa < %s | FileCheck %s
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

declare void @f() nounwind

; Don't hoist load past nounwind call.
define i32 @test1(ptr noalias nocapture readonly %a) nounwind uwtable {
; CHECK-LABEL: define i32 @test1(
; CHECK-SAME: ptr noalias readonly captures(none) [[A:%.*]]) #[[ATTR1:[0-9]+]] {
; CHECK-NEXT:  [[ENTRY:.*]]:
; CHECK-NEXT:    br label %[[FOR_BODY:.*]]
; CHECK:       [[FOR_BODY]]:
; CHECK-NEXT:    [[I_06:%.*]] = phi i32 [ 0, %[[ENTRY]] ], [ [[INC:%.*]], %[[FOR_BODY]] ]
; CHECK-NEXT:    [[X_05:%.*]] = phi i32 [ 0, %[[ENTRY]] ], [ [[ADD:%.*]], %[[FOR_BODY]] ]
; CHECK-NEXT:    tail call void @f() #[[ATTR0:[0-9]+]]
; CHECK-NEXT:    [[I1:%.*]] = load i32, ptr [[A]], align 4
; CHECK-NEXT:    [[ADD]] = add nsw i32 [[I1]], [[X_05]]
; CHECK-NEXT:    [[INC]] = add nuw nsw i32 [[I_06]], 1
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp eq i32 [[INC]], 1000
; CHECK-NEXT:    br i1 [[EXITCOND]], label %[[FOR_COND_CLEANUP:.*]], label %[[FOR_BODY]]
; CHECK:       [[FOR_COND_CLEANUP]]:
; CHECK-NEXT:    [[ADD_LCSSA:%.*]] = phi i32 [ [[ADD]], %[[FOR_BODY]] ]
; CHECK-NEXT:    ret i32 [[ADD_LCSSA]]
;
entry:
  br label %for.body

for.body:
  %i.06 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
  %x.05 = phi i32 [ 0, %entry ], [ %add, %for.body ]
  tail call void @f() nounwind
  %i1 = load i32, ptr %a, align 4
  %add = add nsw i32 %i1, %x.05
  %inc = add nuw nsw i32 %i.06, 1
  %exitcond = icmp eq i32 %inc, 1000
  br i1 %exitcond, label %for.cond.cleanup, label %for.body

for.cond.cleanup:
  ret i32 %add
}

; Don't hoist division past nounwind call.
define i32 @test2(i32 %N, i32 %c) nounwind uwtable {
; CHECK-LABEL: define i32 @test2(
; CHECK-SAME: i32 [[N:%.*]], i32 [[C:%.*]]) #[[ATTR1]] {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    [[CMP4:%.*]] = icmp sgt i32 [[N]], 0
; CHECK-NEXT:    br i1 [[CMP4]], label %[[FOR_BODY_PREHEADER:.*]], label %[[FOR_COND_CLEANUP:.*]]
; CHECK:       [[FOR_BODY_PREHEADER]]:
; CHECK-NEXT:    br label %[[FOR_BODY:.*]]
; CHECK:       [[FOR_BODY]]:
; CHECK-NEXT:    [[I_05:%.*]] = phi i32 [ [[INC:%.*]], %[[FOR_BODY]] ], [ 0, %[[FOR_BODY_PREHEADER]] ]
; CHECK-NEXT:    tail call void @f() #[[ATTR0]]
; CHECK-NEXT:    [[DIV:%.*]] = sdiv i32 5, [[C]]
; CHECK-NEXT:    [[ADD:%.*]] = add i32 [[I_05]], 1
; CHECK-NEXT:    [[INC]] = add i32 [[ADD]], [[DIV]]
; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[INC]], [[N]]
; CHECK-NEXT:    br i1 [[CMP]], label %[[FOR_BODY]], label %[[FOR_COND_CLEANUP_LOOPEXIT:.*]]
; CHECK:       [[FOR_COND_CLEANUP_LOOPEXIT]]:
; CHECK-NEXT:    br label %[[FOR_COND_CLEANUP]]
; CHECK:       [[FOR_COND_CLEANUP]]:
; CHECK-NEXT:    ret i32 0
;
entry:
  %cmp4 = icmp sgt i32 %N, 0
  br i1 %cmp4, label %for.body, label %for.cond.cleanup

for.body:
  %i.05 = phi i32 [ %inc, %for.body ], [ 0, %entry ]
  tail call void @f() nounwind
  %div = sdiv i32 5, %c
  %add = add i32 %i.05, 1
  %inc = add i32 %add, %div
  %cmp = icmp slt i32 %inc, %N
  br i1 %cmp, label %for.body, label %for.cond.cleanup

for.cond.cleanup:
  ret i32 0
}

; Do not hoist a non-volatile load past volatile load, because it may trap.
define i32 @test3(ptr noalias nocapture readonly %a, ptr %v) nounwind uwtable {
; CHECK-LABEL: define i32 @test3(
; CHECK-SAME: ptr noalias readonly captures(none) [[A:%.*]], ptr [[V:%.*]]) #[[ATTR1]] {
; CHECK-NEXT:  [[ENTRY:.*]]:
; CHECK-NEXT:    br label %[[FOR_BODY:.*]]
; CHECK:       [[FOR_BODY]]:
; CHECK-NEXT:    [[I_06:%.*]] = phi i32 [ 0, %[[ENTRY]] ], [ [[INC:%.*]], %[[FOR_BODY]] ]
; CHECK-NEXT:    [[X_05:%.*]] = phi i32 [ 0, %[[ENTRY]] ], [ [[ADD:%.*]], %[[FOR_BODY]] ]
; CHECK-NEXT:    [[XXX:%.*]] = load volatile i32, ptr [[V]], align 4
; CHECK-NEXT:    [[I1:%.*]] = load i32, ptr [[A]], align 4
; CHECK-NEXT:    [[ADD]] = add nsw i32 [[I1]], [[X_05]]
; CHECK-NEXT:    [[INC]] = add nuw nsw i32 [[I_06]], 1
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp eq i32 [[INC]], 1000
; CHECK-NEXT:    br i1 [[EXITCOND]], label %[[FOR_COND_CLEANUP:.*]], label %[[FOR_BODY]]
; CHECK:       [[FOR_COND_CLEANUP]]:
; CHECK-NEXT:    [[ADD_LCSSA:%.*]] = phi i32 [ [[ADD]], %[[FOR_BODY]] ]
; CHECK-NEXT:    ret i32 [[ADD_LCSSA]]
;
entry:
  br label %for.body

for.body:
  %i.06 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
  %x.05 = phi i32 [ 0, %entry ], [ %add, %for.body ]
  %xxx = load volatile i32, ptr %v, align 4
  %i1 = load i32, ptr %a, align 4
  %add = add nsw i32 %i1, %x.05
  %inc = add nuw nsw i32 %i.06, 1
  %exitcond = icmp eq i32 %inc, 1000
  br i1 %exitcond, label %for.cond.cleanup, label %for.body

for.cond.cleanup:
  ret i32 %add
}

; Don't a volatile load past volatile load.
define i32 @test4(ptr noalias nocapture readonly %a, ptr %v) nounwind uwtable {
; CHECK-LABEL: define i32 @test4(
; CHECK-SAME: ptr noalias readonly captures(none) [[A:%.*]], ptr [[V:%.*]]) #[[ATTR1]] {
; CHECK-NEXT:  [[ENTRY:.*]]:
; CHECK-NEXT:    br label %[[FOR_BODY:.*]]
; CHECK:       [[FOR_BODY]]:
; CHECK-NEXT:    [[I_06:%.*]] = phi i32 [ 0, %[[ENTRY]] ], [ [[INC:%.*]], %[[FOR_BODY]] ]
; CHECK-NEXT:    [[X_05:%.*]] = phi i32 [ 0, %[[ENTRY]] ], [ [[ADD:%.*]], %[[FOR_BODY]] ]
; CHECK-NEXT:    [[XXX:%.*]] = load volatile i32, ptr [[V]], align 4
; CHECK-NEXT:    [[I1:%.*]] = load volatile i32, ptr [[A]], align 4
; CHECK-NEXT:    [[ADD]] = add nsw i32 [[I1]], [[X_05]]
; CHECK-NEXT:    [[INC]] = add nuw nsw i32 [[I_06]], 1
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp eq i32 [[INC]], 1000
; CHECK-NEXT:    br i1 [[EXITCOND]], label %[[FOR_COND_CLEANUP:.*]], label %[[FOR_BODY]]
; CHECK:       [[FOR_COND_CLEANUP]]:
; CHECK-NEXT:    [[ADD_LCSSA:%.*]] = phi i32 [ [[ADD]], %[[FOR_BODY]] ]
; CHECK-NEXT:    ret i32 [[ADD_LCSSA]]
;
entry:
  br label %for.body

for.body:
  %i.06 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
  %x.05 = phi i32 [ 0, %entry ], [ %add, %for.body ]
  %xxx = load volatile i32, ptr %v, align 4
  %i1 = load volatile i32, ptr %a, align 4
  %add = add nsw i32 %i1, %x.05
  %inc = add nuw nsw i32 %i.06, 1
  %exitcond = icmp eq i32 %inc, 1000
  br i1 %exitcond, label %for.cond.cleanup, label %for.body

for.cond.cleanup:
  ret i32 %add
}