llvm/test/Analysis/GlobalsModRef/noescape-nocapture-nocallback.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -aa-pipeline=basic-aa,globals-aa -S -passes='require<globals-aa>,function(loop-mssa(licm))' | FileCheck %s

;Reference C code:
;struct str {
;  void **p;
;};
;static struct str obj;
;extern void nocapture_nocallback_func(struct str *);
;void test(void *p) {
;  nocapture_nocallback_func(&obj);
;  for (int i = 0; i < 1000; ++i) {
;    unknown_call(); // optional
;    obj.p[i] = p;
;  }
;}

target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"

%struct.str = type { ptr }

@obj0 = internal global %struct.str zeroinitializer, align 8
@obj1 = internal global %struct.str zeroinitializer, align 8
@obj2 = internal global %struct.str zeroinitializer, align 8
@obj3 = internal global %struct.str zeroinitializer, align 8
@obj4 = internal global %struct.str zeroinitializer, align 8
@obj5 = internal global %struct.str zeroinitializer, align 8

define dso_local void @test0(ptr %p) {
; Check that load from @obj0 is hoisted from the loop, meaning
; that it does not conflict with the store inside the loop:
; CHECK-LABEL: @test0(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    call void @nocapture_nocallback_func(ptr @obj0)
; CHECK-NEXT:    [[TMP0:%.*]] = load ptr, ptr @obj0, align 8
; CHECK-NEXT:    br label [[FOR_COND:%.*]]
; CHECK:       for.cond:
; CHECK-NEXT:    [[I_0:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_INC:%.*]] ]
; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[I_0]], 1000
; CHECK-NEXT:    br i1 [[CMP]], label [[FOR_BODY:%.*]], label [[FOR_END:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    [[IDXPROM:%.*]] = sext i32 [[I_0]] to i64
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds ptr, ptr [[TMP0]], i64 [[IDXPROM]]
; CHECK-NEXT:    store ptr [[P:%.*]], ptr [[ARRAYIDX]], align 8
; CHECK-NEXT:    br label [[FOR_INC]]
; CHECK:       for.inc:
; CHECK-NEXT:    [[INC]] = add nsw i32 [[I_0]], 1
; CHECK-NEXT:    br label [[FOR_COND]]
; CHECK:       for.end:
; CHECK-NEXT:    ret void
;

entry:
  call void @nocapture_nocallback_func(ptr @obj0)
  br label %for.cond

for.cond:                                         ; preds = %for.inc, %entry
  %i.0 = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
  %cmp = icmp slt i32 %i.0, 1000
  br i1 %cmp, label %for.body, label %for.end

for.body:                                         ; preds = %for.cond
  %0 = load ptr, ptr @obj0, align 8
  %idxprom = sext i32 %i.0 to i64
  %arrayidx = getelementptr inbounds ptr, ptr %0, i64 %idxprom
  store ptr %p, ptr %arrayidx, align 8
  br label %for.inc

for.inc:                                          ; preds = %for.body
  %inc = add nsw i32 %i.0, 1
  br label %for.cond

for.end:                                          ; preds = %for.cond
  ret void
}

define dso_local void @test1(ptr %p) {
; Check that load from @obj1 is not hoisted from the loop,
; because 'nocallback' is missing:
; CHECK-LABEL: @test1(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    call void @nocapture_func(ptr @obj1)
; CHECK-NEXT:    br label [[FOR_COND:%.*]]
; CHECK:       for.cond:
; CHECK-NEXT:    [[I_0:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_INC:%.*]] ]
; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[I_0]], 1000
; CHECK-NEXT:    br i1 [[CMP]], label [[FOR_BODY:%.*]], label [[FOR_END:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    [[TMP0:%.*]] = load ptr, ptr @obj1, align 8
; CHECK-NEXT:    [[IDXPROM:%.*]] = sext i32 [[I_0]] to i64
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds ptr, ptr [[TMP0]], i64 [[IDXPROM]]
; CHECK-NEXT:    store ptr [[P:%.*]], ptr [[ARRAYIDX]], align 8
; CHECK-NEXT:    br label [[FOR_INC]]
; CHECK:       for.inc:
; CHECK-NEXT:    [[INC]] = add nsw i32 [[I_0]], 1
; CHECK-NEXT:    br label [[FOR_COND]]
; CHECK:       for.end:
; CHECK-NEXT:    ret void
;

entry:
  call void @nocapture_func(ptr @obj1)
  br label %for.cond

for.cond:                                         ; preds = %for.inc, %entry
  %i.0 = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
  %cmp = icmp slt i32 %i.0, 1000
  br i1 %cmp, label %for.body, label %for.end

for.body:                                         ; preds = %for.cond
  %0 = load ptr, ptr @obj1, align 8
  %idxprom = sext i32 %i.0 to i64
  %arrayidx = getelementptr inbounds ptr, ptr %0, i64 %idxprom
  store ptr %p, ptr %arrayidx, align 8
  br label %for.inc

for.inc:                                          ; preds = %for.body
  %inc = add nsw i32 %i.0, 1
  br label %for.cond

for.end:                                          ; preds = %for.cond
  ret void
}

define dso_local void @test2(ptr %p) {
; Check that load from @obj2 is not hoisted from the loop,
; because 'nocapture' is missing:
; CHECK-LABEL: @test2(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    call void @nocallback_func(ptr @obj2)
; CHECK-NEXT:    br label [[FOR_COND:%.*]]
; CHECK:       for.cond:
; CHECK-NEXT:    [[I_0:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_INC:%.*]] ]
; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[I_0]], 1000
; CHECK-NEXT:    br i1 [[CMP]], label [[FOR_BODY:%.*]], label [[FOR_END:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    [[TMP0:%.*]] = load ptr, ptr @obj2, align 8
; CHECK-NEXT:    [[IDXPROM:%.*]] = sext i32 [[I_0]] to i64
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds ptr, ptr [[TMP0]], i64 [[IDXPROM]]
; CHECK-NEXT:    store ptr [[P:%.*]], ptr [[ARRAYIDX]], align 8
; CHECK-NEXT:    br label [[FOR_INC]]
; CHECK:       for.inc:
; CHECK-NEXT:    [[INC]] = add nsw i32 [[I_0]], 1
; CHECK-NEXT:    br label [[FOR_COND]]
; CHECK:       for.end:
; CHECK-NEXT:    ret void
;

entry:
  call void @nocallback_func(ptr @obj2)
  br label %for.cond

for.cond:                                         ; preds = %for.inc, %entry
  %i.0 = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
  %cmp = icmp slt i32 %i.0, 1000
  br i1 %cmp, label %for.body, label %for.end

for.body:                                         ; preds = %for.cond
  %0 = load ptr, ptr @obj2, align 8
  %idxprom = sext i32 %i.0 to i64
  %arrayidx = getelementptr inbounds ptr, ptr %0, i64 %idxprom
  store ptr %p, ptr %arrayidx, align 8
  br label %for.inc

for.inc:                                          ; preds = %for.body
  %inc = add nsw i32 %i.0, 1
  br label %for.cond

for.end:                                          ; preds = %for.cond
  ret void
}

define dso_local void @test3(ptr %p) {
; Check that load from @obj3 is hoisted from the loop, even though
; there is unknown call in the loop.
; CHECK-LABEL: @test3(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    call void @nocapture_nocallback_func(ptr @obj3)
; CHECK-NEXT:    [[TMP0:%.*]] = load ptr, ptr @obj3, align 8
; CHECK-NEXT:    br label [[FOR_COND:%.*]]
; CHECK:       for.cond:
; CHECK-NEXT:    [[I_0:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_INC:%.*]] ]
; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[I_0]], 1000
; CHECK-NEXT:    br i1 [[CMP]], label [[FOR_BODY:%.*]], label [[FOR_END:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    call void @unknown_call()
; CHECK-NEXT:    [[IDXPROM:%.*]] = sext i32 [[I_0]] to i64
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds ptr, ptr [[TMP0]], i64 [[IDXPROM]]
; CHECK-NEXT:    store ptr [[P:%.*]], ptr [[ARRAYIDX]], align 8
; CHECK-NEXT:    br label [[FOR_INC]]
; CHECK:       for.inc:
; CHECK-NEXT:    [[INC]] = add nsw i32 [[I_0]], 1
; CHECK-NEXT:    br label [[FOR_COND]]
; CHECK:       for.end:
; CHECK-NEXT:    ret void
;

entry:
  call void @nocapture_nocallback_func(ptr @obj3)
  br label %for.cond

for.cond:                                         ; preds = %for.inc, %entry
  %i.0 = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
  %cmp = icmp slt i32 %i.0, 1000
  br i1 %cmp, label %for.body, label %for.end

for.body:                                         ; preds = %for.cond
  %0 = load ptr, ptr @obj3, align 8
  call void @unknown_call()
  %idxprom = sext i32 %i.0 to i64
  %arrayidx = getelementptr inbounds ptr, ptr %0, i64 %idxprom
  store ptr %p, ptr %arrayidx, align 8
  br label %for.inc

for.inc:                                          ; preds = %for.body
  %inc = add nsw i32 %i.0, 1
  br label %for.cond

for.end:                                          ; preds = %for.cond
  ret void
}

define dso_local void @test4(ptr %p) {
; Check that load from @obj4 is not hoisted from the loop,
; because 'nocallback' is missing:
; CHECK-LABEL: @test4(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    call void @nocapture_func(ptr @obj4)
; CHECK-NEXT:    br label [[FOR_COND:%.*]]
; CHECK:       for.cond:
; CHECK-NEXT:    [[I_0:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_INC:%.*]] ]
; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[I_0]], 1000
; CHECK-NEXT:    br i1 [[CMP]], label [[FOR_BODY:%.*]], label [[FOR_END:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    [[TMP0:%.*]] = load ptr, ptr @obj4, align 8
; CHECK-NEXT:    call void @unknown_call()
; CHECK-NEXT:    [[IDXPROM:%.*]] = sext i32 [[I_0]] to i64
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds ptr, ptr [[TMP0]], i64 [[IDXPROM]]
; CHECK-NEXT:    store ptr [[P:%.*]], ptr [[ARRAYIDX]], align 8
; CHECK-NEXT:    br label [[FOR_INC]]
; CHECK:       for.inc:
; CHECK-NEXT:    [[INC]] = add nsw i32 [[I_0]], 1
; CHECK-NEXT:    br label [[FOR_COND]]
; CHECK:       for.end:
; CHECK-NEXT:    ret void
;

entry:
  call void @nocapture_func(ptr @obj4)
  br label %for.cond

for.cond:                                         ; preds = %for.inc, %entry
  %i.0 = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
  %cmp = icmp slt i32 %i.0, 1000
  br i1 %cmp, label %for.body, label %for.end

for.body:                                         ; preds = %for.cond
  %0 = load ptr, ptr @obj4, align 8
  call void @unknown_call()
  %idxprom = sext i32 %i.0 to i64
  %arrayidx = getelementptr inbounds ptr, ptr %0, i64 %idxprom
  store ptr %p, ptr %arrayidx, align 8
  br label %for.inc

for.inc:                                          ; preds = %for.body
  %inc = add nsw i32 %i.0, 1
  br label %for.cond

for.end:                                          ; preds = %for.cond
  ret void
}

define dso_local void @test5(ptr %p) {
; Check that load from @obj5 is not hoisted from the loop,
; because 'nocapture' is missing:
; CHECK-LABEL: @test5(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    call void @nocallback_func(ptr @obj5)
; CHECK-NEXT:    br label [[FOR_COND:%.*]]
; CHECK:       for.cond:
; CHECK-NEXT:    [[I_0:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_INC:%.*]] ]
; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[I_0]], 1000
; CHECK-NEXT:    br i1 [[CMP]], label [[FOR_BODY:%.*]], label [[FOR_END:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    [[TMP0:%.*]] = load ptr, ptr @obj5, align 8
; CHECK-NEXT:    call void @unknown_call()
; CHECK-NEXT:    [[IDXPROM:%.*]] = sext i32 [[I_0]] to i64
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds ptr, ptr [[TMP0]], i64 [[IDXPROM]]
; CHECK-NEXT:    store ptr [[P:%.*]], ptr [[ARRAYIDX]], align 8
; CHECK-NEXT:    br label [[FOR_INC]]
; CHECK:       for.inc:
; CHECK-NEXT:    [[INC]] = add nsw i32 [[I_0]], 1
; CHECK-NEXT:    br label [[FOR_COND]]
; CHECK:       for.end:
; CHECK-NEXT:    ret void
;

entry:
  call void @nocallback_func(ptr @obj5)
  br label %for.cond

for.cond:                                         ; preds = %for.inc, %entry
  %i.0 = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
  %cmp = icmp slt i32 %i.0, 1000
  br i1 %cmp, label %for.body, label %for.end

for.body:                                         ; preds = %for.cond
  %0 = load ptr, ptr @obj5, align 8
  call void @unknown_call()
  %idxprom = sext i32 %i.0 to i64
  %arrayidx = getelementptr inbounds ptr, ptr %0, i64 %idxprom
  store ptr %p, ptr %arrayidx, align 8
  br label %for.inc

for.inc:                                          ; preds = %for.body
  %inc = add nsw i32 %i.0, 1
  br label %for.cond

for.end:                                          ; preds = %for.cond
  ret void
}

declare void @nocapture_nocallback_func(ptr nocapture) nocallback
declare void @nocapture_func(ptr nocapture)
declare void @nocallback_func(ptr) nocallback
; nosync and nocallback are required, otherwise the call
; will by ModRef for any global:
declare void @unknown_call() nosync nocallback