Index: llvm/lib/Transforms/IPO/AttributorAttributes.cpp
===================================================================
--- llvm/lib/Transforms/IPO/AttributorAttributes.cpp
+++ llvm/lib/Transforms/IPO/AttributorAttributes.cpp
@@ -2015,7 +2015,6 @@
         // the argument is poison. Furthermore, if the argument is poison and
         // the position is known to have noundef attriubte, this callsite is
         // considered UB.
-        // TODO: Check also nopoison attribute if it is introduced.
         if (idx >= Callee->arg_size())
           break;
         Value *ArgVal = CB.getArgOperand(idx);
@@ -2028,7 +2027,9 @@
         //   (3) Simplified to null pointer where known to be nonnull.
         //       The argument is a poison value and violate noundef attribute.
         IRPosition CalleeArgumentIRP = IRPosition::callsite_argument(CB, idx);
-        if (!CalleeArgumentIRP.hasAttr({Attribute::NoUndef}))
+        auto &NoUndefAA = A.getAAFor<AANoUndef>(*this, CalleeArgumentIRP,
+                                                /* TrackDependence */ false);
+        if (!NoUndefAA.isKnownNoUndef())
           continue;
         auto &ValueSimplifyAA = A.getAAFor<AAValueSimplify>(
             *this, IRPosition::value(*ArgVal), /* TrackDependence */ false);
@@ -2097,9 +2098,14 @@
 
     // If the returned position of the anchor scope has noundef attriubte, check
     // all returned instructions.
-    // TODO: If AANoUndef is implemented, ask it here.
-    if (IRPosition::returned(*getAnchorScope()).hasAttr({Attribute::NoUndef}))
-      A.checkForAllReturnedValuesAndReturnInsts(InspectReturnInstForUB, *this);
+    if (!getAnchorScope()->getReturnType()->isVoidTy()) {
+      auto &RetPosNoUndefAA =
+          A.getAAFor<AANoUndef>(*this, IRPosition::returned(*getAnchorScope()),
+                                /* TrackDependence */ false);
+      if (RetPosNoUndefAA.isKnownNoUndef())
+        A.checkForAllReturnedValuesAndReturnInsts(InspectReturnInstForUB,
+                                                  *this);
+    }
 
     if (NoUBPrevSize != AssumedNoUBInsts.size() ||
         UBPrevSize != KnownUBInsts.size())
Index: llvm/test/Transforms/Attributor/IPConstantProp/PR16052.ll
===================================================================
--- llvm/test/Transforms/Attributor/IPConstantProp/PR16052.ll
+++ llvm/test/Transforms/Attributor/IPConstantProp/PR16052.ll
@@ -1,6 +1,6 @@
 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --function-signature --check-attributes
-; RUN: opt -attributor -enable-new-pm=0 -attributor-manifest-internal  -attributor-max-iterations-verify -attributor-annotate-decl-cs -attributor-max-iterations=2 -S < %s | FileCheck %s --check-prefixes=CHECK,NOT_CGSCC_NPM,NOT_CGSCC_OPM,NOT_TUNIT_NPM,IS__TUNIT____,IS________OPM,IS__TUNIT_OPM
-; RUN: opt -aa-pipeline=basic-aa -passes=attributor -attributor-manifest-internal  -attributor-max-iterations-verify -attributor-annotate-decl-cs -attributor-max-iterations=2 -S < %s | FileCheck %s --check-prefixes=CHECK,NOT_CGSCC_OPM,NOT_CGSCC_NPM,NOT_TUNIT_OPM,IS__TUNIT____,IS________NPM,IS__TUNIT_NPM
+; RUN: opt -attributor -enable-new-pm=0 -attributor-manifest-internal  -attributor-max-iterations-verify -attributor-annotate-decl-cs -attributor-max-iterations=3 -S < %s | FileCheck %s --check-prefixes=CHECK,NOT_CGSCC_NPM,NOT_CGSCC_OPM,NOT_TUNIT_NPM,IS__TUNIT____,IS________OPM,IS__TUNIT_OPM
+; RUN: opt -aa-pipeline=basic-aa -passes=attributor -attributor-manifest-internal  -attributor-max-iterations-verify -attributor-annotate-decl-cs -attributor-max-iterations=3 -S < %s | FileCheck %s --check-prefixes=CHECK,NOT_CGSCC_OPM,NOT_CGSCC_NPM,NOT_TUNIT_OPM,IS__TUNIT____,IS________NPM,IS__TUNIT_NPM
 ; RUN: opt -attributor-cgscc -enable-new-pm=0 -attributor-manifest-internal  -attributor-annotate-decl-cs -S < %s | FileCheck %s --check-prefixes=CHECK,NOT_TUNIT_NPM,NOT_TUNIT_OPM,NOT_CGSCC_NPM,IS__CGSCC____,IS________OPM,IS__CGSCC_OPM
 ; RUN: opt -aa-pipeline=basic-aa -passes=attributor-cgscc -attributor-manifest-internal  -attributor-annotate-decl-cs -S < %s | FileCheck %s --check-prefixes=CHECK,NOT_TUNIT_NPM,NOT_TUNIT_OPM,NOT_CGSCC_OPM,IS__CGSCC____,IS________NPM,IS__CGSCC_NPM
 
Index: llvm/test/Transforms/Attributor/alwaysinline.ll
===================================================================
--- llvm/test/Transforms/Attributor/alwaysinline.ll
+++ llvm/test/Transforms/Attributor/alwaysinline.ll
@@ -1,6 +1,6 @@
 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --function-signature --check-attributes
-; RUN: opt -attributor -enable-new-pm=0 -attributor-manifest-internal  -attributor-max-iterations-verify -attributor-annotate-decl-cs -attributor-max-iterations=2 -S < %s | FileCheck %s --check-prefixes=CHECK,NOT_CGSCC_NPM,NOT_CGSCC_OPM,NOT_TUNIT_NPM,IS__TUNIT____,IS________OPM,IS__TUNIT_OPM
-; RUN: opt -aa-pipeline=basic-aa -passes=attributor -attributor-manifest-internal  -attributor-max-iterations-verify -attributor-annotate-decl-cs -attributor-max-iterations=2 -S < %s | FileCheck %s --check-prefixes=CHECK,NOT_CGSCC_OPM,NOT_CGSCC_NPM,NOT_TUNIT_OPM,IS__TUNIT____,IS________NPM,IS__TUNIT_NPM
+; RUN: opt -attributor -enable-new-pm=0 -attributor-manifest-internal  -attributor-max-iterations-verify -attributor-annotate-decl-cs -attributor-max-iterations=3 -S < %s | FileCheck %s --check-prefixes=CHECK,NOT_CGSCC_NPM,NOT_CGSCC_OPM,NOT_TUNIT_NPM,IS__TUNIT____,IS________OPM,IS__TUNIT_OPM
+; RUN: opt -aa-pipeline=basic-aa -passes=attributor -attributor-manifest-internal  -attributor-max-iterations-verify -attributor-annotate-decl-cs -attributor-max-iterations=3 -S < %s | FileCheck %s --check-prefixes=CHECK,NOT_CGSCC_OPM,NOT_CGSCC_NPM,NOT_TUNIT_OPM,IS__TUNIT____,IS________NPM,IS__TUNIT_NPM
 ; RUN: opt -attributor-cgscc -enable-new-pm=0 -attributor-manifest-internal  -attributor-annotate-decl-cs -S < %s | FileCheck %s --check-prefixes=CHECK,NOT_TUNIT_NPM,NOT_TUNIT_OPM,NOT_CGSCC_NPM,IS__CGSCC____,IS________OPM,IS__CGSCC_OPM
 ; RUN: opt -aa-pipeline=basic-aa -passes=attributor-cgscc -attributor-manifest-internal  -attributor-annotate-decl-cs -S < %s | FileCheck %s --check-prefixes=CHECK,NOT_TUNIT_NPM,NOT_TUNIT_OPM,NOT_CGSCC_OPM,IS__CGSCC____,IS________NPM,IS__CGSCC_NPM
 ;
Index: llvm/test/Transforms/Attributor/noreturn_sync.ll
===================================================================
--- llvm/test/Transforms/Attributor/noreturn_sync.ll
+++ llvm/test/Transforms/Attributor/noreturn_sync.ll
@@ -1,5 +1,5 @@
 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --function-signature --check-attributes
-; RUN: opt -attributor  -attributor-max-iterations-verify -attributor-annotate-decl-cs -attributor-max-iterations=2 -S < %s | FileCheck %s
+; RUN: opt -attributor  -attributor-max-iterations-verify -attributor-annotate-decl-cs -attributor-max-iterations=3 -S < %s | FileCheck %s
 ;
 ; This file is the same as noreturn_async.ll but with a personality which
 ; indicates that the exception handler *cannot* catch asynchronous exceptions.
Index: llvm/test/Transforms/Attributor/undefined_behavior.ll
===================================================================
--- llvm/test/Transforms/Attributor/undefined_behavior.ll
+++ llvm/test/Transforms/Attributor/undefined_behavior.ll
@@ -749,14 +749,12 @@
 ; IS__TUNIT____: Function Attrs: nofree nosync nounwind readnone willreturn
 ; IS__TUNIT____-LABEL: define {{[^@]+}}@arg_nonnull_violation1_1
 ; IS__TUNIT____-SAME: () [[ATTR0]] {
-; IS__TUNIT____-NEXT:    call void @arg_nonnull_1(i32* noalias nocapture nofree noundef nonnull writeonly align 536870912 null) [[ATTR7:#.*]]
-; IS__TUNIT____-NEXT:    ret void
+; IS__TUNIT____-NEXT:    unreachable
 ;
 ; IS__CGSCC____: Function Attrs: nofree norecurse nosync nounwind readnone willreturn
 ; IS__CGSCC____-LABEL: define {{[^@]+}}@arg_nonnull_violation1_1
 ; IS__CGSCC____-SAME: () [[ATTR0]] {
-; IS__CGSCC____-NEXT:    call void @arg_nonnull_1(i32* noalias nocapture nofree noundef nonnull writeonly align 536870912 dereferenceable(4) null) [[ATTR7:#.*]]
-; IS__CGSCC____-NEXT:    ret void
+; IS__CGSCC____-NEXT:    unreachable
 ;
   call void @arg_nonnull_1(i32* null)
   ret void
@@ -782,14 +780,12 @@
 ; IS__TUNIT____: Function Attrs: nofree nosync nounwind readnone willreturn
 ; IS__TUNIT____-LABEL: define {{[^@]+}}@arg_nonnull_violation2_1
 ; IS__TUNIT____-SAME: (i1 [[C:%.*]]) [[ATTR0]] {
-; IS__TUNIT____-NEXT:    call void @arg_nonnull_1(i32* nocapture nofree noundef nonnull writeonly align 536870912 null) [[ATTR7]]
-; IS__TUNIT____-NEXT:    ret void
+; IS__TUNIT____-NEXT:    unreachable
 ;
 ; IS__CGSCC____: Function Attrs: nofree norecurse nosync nounwind readnone willreturn
 ; IS__CGSCC____-LABEL: define {{[^@]+}}@arg_nonnull_violation2_1
 ; IS__CGSCC____-SAME: (i1 [[C:%.*]]) [[ATTR0]] {
-; IS__CGSCC____-NEXT:    call void @arg_nonnull_1(i32* nocapture nofree noundef nonnull writeonly align 536870912 dereferenceable(4) null) [[ATTR7]]
-; IS__CGSCC____-NEXT:    ret void
+; IS__CGSCC____-NEXT:    unreachable
 ;
   %null = getelementptr i32, i32* null, i32 0
   %mustnull = select i1 %c, i32* null, i32* %null
@@ -822,17 +818,11 @@
 ; IS__TUNIT____-NEXT:    [[PTR:%.*]] = alloca i32, align 4
 ; IS__TUNIT____-NEXT:    br i1 [[C]], label [[T:%.*]], label [[F:%.*]]
 ; IS__TUNIT____:       t:
-; IS__TUNIT____-NEXT:    call void @arg_nonnull_12(i32* nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], i32* nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], i32* nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]]) [[ATTR7]]
+; IS__TUNIT____-NEXT:    call void @arg_nonnull_12(i32* nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], i32* nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], i32* nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]]) [[ATTR7:#.*]]
 ; IS__TUNIT____-NEXT:    call void @arg_nonnull_12(i32* nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], i32* nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], i32* noalias nocapture nofree noundef writeonly align 536870912 null) [[ATTR7]]
-; IS__TUNIT____-NEXT:    call void @arg_nonnull_12(i32* nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], i32* noalias nocapture nofree noundef nonnull writeonly align 536870912 null, i32* nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]]) [[ATTR7]]
-; IS__TUNIT____-NEXT:    call void @arg_nonnull_12(i32* nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], i32* noalias nocapture nofree noundef nonnull writeonly align 536870912 null, i32* noalias nocapture nofree noundef writeonly align 536870912 null) [[ATTR7]]
-; IS__TUNIT____-NEXT:    br label [[RET:%.*]]
+; IS__TUNIT____-NEXT:    unreachable
 ; IS__TUNIT____:       f:
-; IS__TUNIT____-NEXT:    call void @arg_nonnull_12(i32* noalias nocapture nofree noundef nonnull writeonly align 536870912 null, i32* nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], i32* nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]]) [[ATTR7]]
-; IS__TUNIT____-NEXT:    call void @arg_nonnull_12(i32* noalias nocapture nofree noundef nonnull writeonly align 536870912 null, i32* nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], i32* noalias nocapture nofree noundef writeonly align 536870912 null) [[ATTR7]]
-; IS__TUNIT____-NEXT:    call void @arg_nonnull_12(i32* noalias nocapture nofree noundef nonnull writeonly align 536870912 null, i32* noalias nocapture nofree noundef nonnull writeonly align 536870912 null, i32* nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]]) [[ATTR7]]
-; IS__TUNIT____-NEXT:    call void @arg_nonnull_12(i32* noalias nocapture nofree noundef nonnull writeonly align 536870912 null, i32* noalias nocapture nofree noundef nonnull writeonly align 536870912 null, i32* noalias nocapture nofree noundef writeonly align 536870912 null) [[ATTR7]]
-; IS__TUNIT____-NEXT:    br label [[RET]]
+; IS__TUNIT____-NEXT:    unreachable
 ; IS__TUNIT____:       ret:
 ; IS__TUNIT____-NEXT:    ret void
 ;
@@ -842,17 +832,11 @@
 ; IS__CGSCC____-NEXT:    [[PTR:%.*]] = alloca i32, align 4
 ; IS__CGSCC____-NEXT:    br i1 [[C]], label [[T:%.*]], label [[F:%.*]]
 ; IS__CGSCC____:       t:
-; IS__CGSCC____-NEXT:    call void @arg_nonnull_12(i32* nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], i32* nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], i32* nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]]) [[ATTR7]]
+; IS__CGSCC____-NEXT:    call void @arg_nonnull_12(i32* nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], i32* nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], i32* nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]]) [[ATTR7:#.*]]
 ; IS__CGSCC____-NEXT:    call void @arg_nonnull_12(i32* nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], i32* nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], i32* noalias nocapture nofree noundef writeonly align 536870912 null) [[ATTR7]]
-; IS__CGSCC____-NEXT:    call void @arg_nonnull_12(i32* nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], i32* noalias nocapture nofree noundef nonnull writeonly align 536870912 null, i32* nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]]) [[ATTR7]]
-; IS__CGSCC____-NEXT:    call void @arg_nonnull_12(i32* nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], i32* noalias nocapture nofree noundef nonnull writeonly align 536870912 null, i32* noalias nocapture nofree noundef writeonly align 536870912 null) [[ATTR7]]
-; IS__CGSCC____-NEXT:    br label [[RET:%.*]]
+; IS__CGSCC____-NEXT:    unreachable
 ; IS__CGSCC____:       f:
-; IS__CGSCC____-NEXT:    call void @arg_nonnull_12(i32* noalias nocapture nofree noundef nonnull writeonly align 536870912 null, i32* nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], i32* nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]]) [[ATTR7]]
-; IS__CGSCC____-NEXT:    call void @arg_nonnull_12(i32* noalias nocapture nofree noundef nonnull writeonly align 536870912 null, i32* nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], i32* noalias nocapture nofree noundef writeonly align 536870912 null) [[ATTR7]]
-; IS__CGSCC____-NEXT:    call void @arg_nonnull_12(i32* noalias nocapture nofree noundef nonnull writeonly align 536870912 null, i32* noalias nocapture nofree noundef nonnull writeonly align 536870912 null, i32* nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]]) [[ATTR7]]
-; IS__CGSCC____-NEXT:    call void @arg_nonnull_12(i32* noalias nocapture nofree noundef nonnull writeonly align 536870912 null, i32* noalias nocapture nofree noundef nonnull writeonly align 536870912 null, i32* noalias nocapture nofree noundef writeonly align 536870912 null) [[ATTR7]]
-; IS__CGSCC____-NEXT:    br label [[RET]]
+; IS__CGSCC____-NEXT:    unreachable
 ; IS__CGSCC____:       ret:
 ; IS__CGSCC____-NEXT:    ret void
 ;
@@ -885,8 +869,6 @@
 ; IS__TUNIT____-NEXT:    call void @arg_nonnull_12_noundef_2(i32* nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], i32* nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], i32* noalias nocapture nofree noundef writeonly align 536870912 null) [[ATTR7]]
 ; IS__TUNIT____-NEXT:    unreachable
 ; IS__TUNIT____:       f:
-; IS__TUNIT____-NEXT:    call void @arg_nonnull_12_noundef_2(i32* noalias nocapture nofree noundef nonnull writeonly align 536870912 null, i32* nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], i32* nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]]) [[ATTR7]]
-; IS__TUNIT____-NEXT:    call void @arg_nonnull_12_noundef_2(i32* noalias nocapture nofree noundef nonnull writeonly align 536870912 null, i32* nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], i32* noalias nocapture nofree noundef writeonly align 536870912 null) [[ATTR7]]
 ; IS__TUNIT____-NEXT:    unreachable
 ; IS__TUNIT____:       ret:
 ; IS__TUNIT____-NEXT:    ret void
@@ -901,8 +883,6 @@
 ; IS__CGSCC____-NEXT:    call void @arg_nonnull_12_noundef_2(i32* nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], i32* nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], i32* noalias nocapture nofree noundef writeonly align 536870912 null) [[ATTR7]]
 ; IS__CGSCC____-NEXT:    unreachable
 ; IS__CGSCC____:       f:
-; IS__CGSCC____-NEXT:    call void @arg_nonnull_12_noundef_2(i32* noalias nocapture nofree noundef nonnull writeonly align 536870912 null, i32* nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], i32* nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]]) [[ATTR7]]
-; IS__CGSCC____-NEXT:    call void @arg_nonnull_12_noundef_2(i32* noalias nocapture nofree noundef nonnull writeonly align 536870912 null, i32* nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], i32* noalias nocapture nofree noundef writeonly align 536870912 null) [[ATTR7]]
 ; IS__CGSCC____-NEXT:    unreachable
 ; IS__CGSCC____:       ret:
 ; IS__CGSCC____-NEXT:    ret void
Index: llvm/test/Transforms/OpenMP/parallel_deletion.ll
===================================================================
--- llvm/test/Transforms/OpenMP/parallel_deletion.ll
+++ llvm/test/Transforms/OpenMP/parallel_deletion.ll
@@ -188,14 +188,14 @@
 ; CHECK-NEXT:  entry:
 ; CHECK-NEXT:    [[A:%.*]] = alloca i32, align 4
 ; CHECK-NEXT:    [[TMP:%.*]] = bitcast i32* [[A]] to i8*
-; CHECK-NEXT:    call void @llvm.lifetime.start.p0i8(i64 4, i8* nonnull align 4 dereferenceable(4) [[TMP]]) #0
+; CHECK-NEXT:    call void @llvm.lifetime.start.p0i8(i64 noundef 4, i8* noundef nonnull align 4 dereferenceable(4) [[TMP]]) #0
 ; CHECK-NEXT:    store i32 0, i32* [[A]], align 4
 ; CHECK-NEXT:    call void (%struct.ident_t*, i32, void (i32*, i32*, ...)*, ...) @__kmpc_fork_call(%struct.ident_t* noundef nonnull align 8 dereferenceable(24) @0, i32 noundef 1, void (i32*, i32*, ...)* noundef bitcast (void (i32*, i32*, i32*)* @.omp_outlined..3 to void (i32*, i32*, ...)*), i32* nocapture nofree noundef nonnull align 4 dereferenceable(4) [[A]])
 ; CHECK-NEXT:    call void (%struct.ident_t*, i32, void (i32*, i32*, ...)*, ...) @__kmpc_fork_call(%struct.ident_t* noundef nonnull align 8 dereferenceable(24) @0, i32 noundef 1, void (i32*, i32*, ...)* noundef bitcast (void (i32*, i32*, i32*)* @.omp_outlined..4 to void (i32*, i32*, ...)*), i32* nocapture noundef nonnull align 4 dereferenceable(4) [[A]])
 ; CHECK-NEXT:    call void (%struct.ident_t*, i32, void (i32*, i32*, ...)*, ...) @__kmpc_fork_call(%struct.ident_t* noundef nonnull align 8 dereferenceable(24) @0, i32 noundef 1, void (i32*, i32*, ...)* noundef bitcast (void (i32*, i32*, i32*)* @.omp_outlined..5 to void (i32*, i32*, ...)*), i32* nocapture noundef nonnull align 4 dereferenceable(4) [[A]])
 ; CHECK-NEXT:    call void (%struct.ident_t*, i32, void (i32*, i32*, ...)*, ...) @__kmpc_fork_call(%struct.ident_t* noundef nonnull align 8 dereferenceable(24) @0, i32 noundef 1, void (i32*, i32*, ...)* noundef bitcast (void (i32*, i32*, i32*)* @.omp_outlined..6 to void (i32*, i32*, ...)*), i32* nocapture noundef nonnull align 4 dereferenceable(4) [[A]])
 ; CHECK-NEXT:    [[TMP1:%.*]] = bitcast i32* [[A]] to i8*
-; CHECK-NEXT:    call void @llvm.lifetime.end.p0i8(i64 4, i8* nonnull [[TMP1]])
+; CHECK-NEXT:    call void @llvm.lifetime.end.p0i8(i64 noundef 4, i8* noundef nonnull [[TMP1]])
 ; CHECK-NEXT:    ret void
 ;
 entry:
@@ -247,14 +247,14 @@
 ; CHECK-SAME: (i32* noalias nocapture nonnull readonly align 4 dereferenceable(4) [[DOTGLOBAL_TID_:%.*]], i32* noalias nocapture nofree readnone [[DOTBOUND_TID_:%.*]], i32* nocapture noundef nonnull align 4 dereferenceable(4) [[A:%.*]])
 ; CHECK-NEXT:  entry:
 ; CHECK-NEXT:    [[TMP:%.*]] = load i32, i32* [[DOTGLOBAL_TID_]], align 4
-; CHECK-NEXT:    [[TMP1:%.*]] = call i32 @__kmpc_master(%struct.ident_t* nonnull @0, i32 [[TMP]])
+; CHECK-NEXT:    [[TMP1:%.*]] = call i32 @__kmpc_master(%struct.ident_t* noundef nonnull @0, i32 [[TMP]])
 ; CHECK-NEXT:    [[TMP2:%.*]] = icmp eq i32 [[TMP1]], 0
 ; CHECK-NEXT:    br i1 [[TMP2]], label [[OMP_IF_END:%.*]], label [[OMP_IF_THEN:%.*]]
 ; CHECK:       omp_if.then:
 ; CHECK-NEXT:    [[TMP3:%.*]] = load i32, i32* [[A]], align 4
 ; CHECK-NEXT:    [[INC:%.*]] = add nsw i32 [[TMP3]], 1
 ; CHECK-NEXT:    store i32 [[INC]], i32* [[A]], align 4
-; CHECK-NEXT:    call void @__kmpc_end_master(%struct.ident_t* nonnull @0, i32 [[TMP]])
+; CHECK-NEXT:    call void @__kmpc_end_master(%struct.ident_t* noundef nonnull @0, i32 [[TMP]])
 ; CHECK-NEXT:    br label [[OMP_IF_END]]
 ; CHECK:       omp_if.end:
 ; CHECK-NEXT:    ret void
@@ -288,19 +288,19 @@
 ; CHECK-LABEL: define {{[^@]+}}@.omp_outlined..5
 ; CHECK-SAME: (i32* noalias nocapture nonnull readonly align 4 dereferenceable(4) [[DOTGLOBAL_TID_:%.*]], i32* noalias nocapture nofree readnone [[DOTBOUND_TID_:%.*]], i32* nocapture noundef nonnull align 4 dereferenceable(4) [[A:%.*]])
 ; CHECK-NEXT:  entry:
-; CHECK-NEXT:    [[OMP_GLOBAL_THREAD_NUM:%.*]] = call i32 @__kmpc_global_thread_num(%struct.ident_t* nonnull @0)
+; CHECK-NEXT:    [[OMP_GLOBAL_THREAD_NUM:%.*]] = call i32 @__kmpc_global_thread_num(%struct.ident_t* noundef nonnull @0)
 ; CHECK-NEXT:    [[TMP:%.*]] = load i32, i32* [[DOTGLOBAL_TID_]], align 4
-; CHECK-NEXT:    [[TMP1:%.*]] = call i32 @__kmpc_single(%struct.ident_t* nonnull @0, i32 [[TMP]])
+; CHECK-NEXT:    [[TMP1:%.*]] = call i32 @__kmpc_single(%struct.ident_t* noundef nonnull @0, i32 [[TMP]])
 ; CHECK-NEXT:    [[TMP2:%.*]] = icmp eq i32 [[TMP1]], 0
 ; CHECK-NEXT:    br i1 [[TMP2]], label [[OMP_IF_END:%.*]], label [[OMP_IF_THEN:%.*]]
 ; CHECK:       omp_if.then:
 ; CHECK-NEXT:    [[TMP3:%.*]] = load i32, i32* [[A]], align 4
 ; CHECK-NEXT:    [[INC:%.*]] = add nsw i32 [[TMP3]], 1
 ; CHECK-NEXT:    store i32 [[INC]], i32* [[A]], align 4
-; CHECK-NEXT:    call void @__kmpc_end_single(%struct.ident_t* nonnull @0, i32 [[TMP]])
+; CHECK-NEXT:    call void @__kmpc_end_single(%struct.ident_t* noundef nonnull @0, i32 [[TMP]])
 ; CHECK-NEXT:    br label [[OMP_IF_END]]
 ; CHECK:       omp_if.end:
-; CHECK-NEXT:    call void @__kmpc_barrier(%struct.ident_t* nonnull @1, i32 [[OMP_GLOBAL_THREAD_NUM]])
+; CHECK-NEXT:    call void @__kmpc_barrier(%struct.ident_t* noundef nonnull @1, i32 [[OMP_GLOBAL_THREAD_NUM]])
 ; CHECK-NEXT:    ret void
 ;
 entry:
@@ -329,13 +329,13 @@
 ; CHECK-NEXT:    [[A1:%.*]] = alloca i32, align 4
 ; CHECK-NEXT:    [[DOTOMP_REDUCTION_RED_LIST:%.*]] = alloca [1 x i8*], align 8
 ; CHECK-NEXT:    [[TMP:%.*]] = bitcast i32* [[A1]] to i8*
-; CHECK-NEXT:    call void @llvm.lifetime.start.p0i8(i64 4, i8* nonnull align 4 [[TMP]]) #0
+; CHECK-NEXT:    call void @llvm.lifetime.start.p0i8(i64 noundef 4, i8* noundef nonnull align 4 [[TMP]]) #0
 ; CHECK-NEXT:    store i32 1, i32* [[A1]], align 4
 ; CHECK-NEXT:    [[TMP1:%.*]] = bitcast [1 x i8*]* [[DOTOMP_REDUCTION_RED_LIST]] to i32**
 ; CHECK-NEXT:    store i32* [[A1]], i32** [[TMP1]], align 8
 ; CHECK-NEXT:    [[TMP2:%.*]] = load i32, i32* [[DOTGLOBAL_TID_]], align 4
 ; CHECK-NEXT:    [[TMP3:%.*]] = bitcast [1 x i8*]* [[DOTOMP_REDUCTION_RED_LIST]] to i8*
-; CHECK-NEXT:    [[TMP4:%.*]] = call i32 @__kmpc_reduce_nowait(%struct.ident_t* nonnull @2, i32 [[TMP2]], i32 1, i64 8, i8* nonnull align 8 [[TMP3]], void (i8*, i8*)* nonnull @.omp.reduction.reduction_func, [8 x i32]* nonnull @.gomp_critical_user_.reduction.var)
+; CHECK-NEXT:    [[TMP4:%.*]] = call i32 @__kmpc_reduce_nowait(%struct.ident_t* noundef nonnull @2, i32 [[TMP2]], i32 noundef 1, i64 noundef 8, i8* noundef nonnull align 8 [[TMP3]], void (i8*, i8*)* noundef nonnull @.omp.reduction.reduction_func, [8 x i32]* noundef nonnull @.gomp_critical_user_.reduction.var)
 ; CHECK-NEXT:    switch i32 [[TMP4]], label [[DOTOMP_REDUCTION_DEFAULT:%.*]] [
 ; CHECK-NEXT:    i32 1, label [[DOTOMP_REDUCTION_CASE1:%.*]]
 ; CHECK-NEXT:    i32 2, label [[DOTOMP_REDUCTION_CASE2:%.*]]
@@ -345,7 +345,7 @@
 ; CHECK-NEXT:    [[TMP6:%.*]] = load i32, i32* [[A1]], align 4
 ; CHECK-NEXT:    [[ADD:%.*]] = add nsw i32 [[TMP5]], [[TMP6]]
 ; CHECK-NEXT:    store i32 [[ADD]], i32* [[A]], align 4
-; CHECK-NEXT:    call void @__kmpc_end_reduce_nowait(%struct.ident_t* nonnull @2, i32 [[TMP2]], [8 x i32]* nonnull @.gomp_critical_user_.reduction.var)
+; CHECK-NEXT:    call void @__kmpc_end_reduce_nowait(%struct.ident_t* noundef nonnull @2, i32 [[TMP2]], [8 x i32]* noundef nonnull @.gomp_critical_user_.reduction.var)
 ; CHECK-NEXT:    br label [[DOTOMP_REDUCTION_DEFAULT]]
 ; CHECK:       .omp.reduction.case2:
 ; CHECK-NEXT:    [[TMP7:%.*]] = load i32, i32* [[A1]], align 4
@@ -353,7 +353,7 @@
 ; CHECK-NEXT:    br label [[DOTOMP_REDUCTION_DEFAULT]]
 ; CHECK:       .omp.reduction.default:
 ; CHECK-NEXT:    [[TMP9:%.*]] = bitcast i32* [[A1]] to i8*
-; CHECK-NEXT:    call void @llvm.lifetime.end.p0i8(i64 4, i8* nonnull [[TMP9]])
+; CHECK-NEXT:    call void @llvm.lifetime.end.p0i8(i64 noundef 4, i8* noundef nonnull [[TMP9]])
 ; CHECK-NEXT:    ret void
 ;
 entry: