[CodeGenCXX] Treat 'this' as noalias in constructors

This is currently a clang extension and a resolution
of the defect report in the C++ Standard.

Differential Revision: https://reviews.llvm.org/D46441


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@344150 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 16 insertions, 16 deletions

diff --git a/test/CodeGenCXX/constructors.cpp b/test/CodeGenCXX/constructors.cpp
index 9322c410f2..d163ffeb6c 100644
--- a/test/CodeGenCXX/constructors.cpp
+++ b/test/CodeGenCXX/constructors.cpp
@@ -22,20 +22,20 @@ struct A {
 A::A(struct Undeclared &ref) : mem(0) {}
 
 // Check that delegation works.
-// NULL-INVALID-LABEL: define void @_ZN1AC2ER10Undeclared(%struct.A* %this, %struct.Undeclared* nonnull %ref) unnamed_addr
-// NULL-VALID-LABEL: define void @_ZN1AC2ER10Undeclared(%struct.A* %this, %struct.Undeclared* %ref) unnamed_addr
+// NULL-INVALID-LABEL: define void @_ZN1AC2ER10Undeclared(%struct.A* noalias %this, %struct.Undeclared* nonnull %ref) unnamed_addr
+// NULL-VALID-LABEL: define void @_ZN1AC2ER10Undeclared(%struct.A* noalias %this, %struct.Undeclared* %ref) unnamed_addr
 // CHECK: call void @_ZN6MemberC1Ei(
 
-// NULL-INVALID-LABEL: define void @_ZN1AC1ER10Undeclared(%struct.A* %this, %struct.Undeclared* nonnull %ref) unnamed_addr
-// NULL-VALID-LABEL: define void @_ZN1AC1ER10Undeclared(%struct.A* %this, %struct.Undeclared* %ref) unnamed_addr
+// NULL-INVALID-LABEL: define void @_ZN1AC1ER10Undeclared(%struct.A* noalias %this, %struct.Undeclared* nonnull %ref) unnamed_addr
+// NULL-VALID-LABEL: define void @_ZN1AC1ER10Undeclared(%struct.A* noalias %this, %struct.Undeclared* %ref) unnamed_addr
 // CHECK: call void @_ZN1AC2ER10Undeclared(
 
 A::A(ValueClass v) : mem(v.y - v.x) {}
 
-// CHECK-LABEL: define void @_ZN1AC2E10ValueClass(%struct.A* %this, i64 %v.coerce) unnamed_addr
+// CHECK-LABEL: define void @_ZN1AC2E10ValueClass(%struct.A* noalias %this, i64 %v.coerce) unnamed_addr
 // CHECK: call void @_ZN6MemberC1Ei(
 
-// CHECK-LABEL: define void @_ZN1AC1E10ValueClass(%struct.A* %this, i64 %v.coerce) unnamed_addr
+// CHECK-LABEL: define void @_ZN1AC1E10ValueClass(%struct.A* noalias %this, i64 %v.coerce) unnamed_addr
 // CHECK: call void @_ZN1AC2E10ValueClass(
 
 /* Test that things work for inheritance. */
@@ -46,13 +46,13 @@ struct B : A {
 
 B::B(struct Undeclared &ref) : A(ref), mem(1) {}
 
-// NULL-INVALID-LABEL: define void @_ZN1BC2ER10Undeclared(%struct.B* %this, %struct.Undeclared* nonnull %ref) unnamed_addr
-// NULL-VALID-LABEL: define void @_ZN1BC2ER10Undeclared(%struct.B* %this, %struct.Undeclared* %ref) unnamed_addr
+// NULL-INVALID-LABEL: define void @_ZN1BC2ER10Undeclared(%struct.B* noalias %this, %struct.Undeclared* nonnull %ref) unnamed_addr
+// NULL-VALID-LABEL: define void @_ZN1BC2ER10Undeclared(%struct.B* noalias %this, %struct.Undeclared* %ref) unnamed_addr
 // CHECK: call void @_ZN1AC2ER10Undeclared(
 // CHECK: call void @_ZN6MemberC1Ei(
 
-// NULL-INVALID-LABEL: define void @_ZN1BC1ER10Undeclared(%struct.B* %this, %struct.Undeclared* nonnull %ref) unnamed_addr
-// NULL-VALID-LABEL: define void @_ZN1BC1ER10Undeclared(%struct.B* %this, %struct.Undeclared* %ref) unnamed_addr
+// NULL-INVALID-LABEL: define void @_ZN1BC1ER10Undeclared(%struct.B* noalias %this, %struct.Undeclared* nonnull %ref) unnamed_addr
+// NULL-VALID-LABEL: define void @_ZN1BC1ER10Undeclared(%struct.B* noalias %this, %struct.Undeclared* %ref) unnamed_addr
 // CHECK: call void @_ZN1BC2ER10Undeclared(
 
 
@@ -67,10 +67,10 @@ struct C : virtual A {
 };
 C::C(int x) : A(ValueClass(x, x+1)), mem(x * x) {}
 
-// CHECK-LABEL: define void @_ZN1CC2Ei(%struct.C* %this, i8** %vtt, i32 %x) unnamed_addr
+// CHECK-LABEL: define void @_ZN1CC2Ei(%struct.C* noalias %this, i8** %vtt, i32 %x) unnamed_addr
 // CHECK: call void @_ZN6MemberC1Ei(
 
-// CHECK-LABEL: define void @_ZN1CC1Ei(%struct.C* %this, i32 %x) unnamed_addr
+// CHECK-LABEL: define void @_ZN1CC1Ei(%struct.C* noalias %this, i32 %x) unnamed_addr
 // CHECK: call void @_ZN10ValueClassC1Eii(
 // CHECK: call void @_ZN1AC2E10ValueClass(
 // CHECK: call void @_ZN6MemberC1Ei(
@@ -85,12 +85,12 @@ struct D : A {
 
 D::D(int x, ...) : A(ValueClass(x, x+1)), mem(x*x) {}
 
-// CHECK-LABEL: define void @_ZN1DC2Eiz(%struct.D* %this, i32 %x, ...) unnamed_addr
+// CHECK-LABEL: define void @_ZN1DC2Eiz(%struct.D* noalias %this, i32 %x, ...) unnamed_addr
 // CHECK: call void @_ZN10ValueClassC1Eii(
 // CHECK: call void @_ZN1AC2E10ValueClass(
 // CHECK: call void @_ZN6MemberC1Ei(
 
-// CHECK-LABEL: define void @_ZN1DC1Eiz(%struct.D* %this, i32 %x, ...) unnamed_addr
+// CHECK-LABEL: define void @_ZN1DC1Eiz(%struct.D* noalias %this, i32 %x, ...) unnamed_addr
 // CHECK: call void @_ZN10ValueClassC1Eii(
 // CHECK: call void @_ZN1AC2E10ValueClass(
 // CHECK: call void @_ZN6MemberC1Ei(
@@ -100,7 +100,7 @@ namespace test0 {
   struct A {};
   struct B : virtual A { int x; };
   struct C : B {};
-  
+
   void test(C &in) {
     C tmp = in;
   }
@@ -117,7 +117,7 @@ namespace test1 {
 
 // Ensure that we
 // a) emit the ABI-required but useless complete object and deleting destructor
-//    symbols for an abstract class, and 
+//    symbols for an abstract class, and
 // b) do *not* emit references to virtual base destructors for an abstract class
 //
 // Our approach to this is to give these functions a body that simply traps.