1*67e74705SXin Li // RUN: %clang_cc1 -triple i686-linux-gnu -emit-llvm %s -o - | FileCheck %s --check-prefix=CHECK-O0 2*67e74705SXin Li // RUN: %clang_cc1 -triple i686-linux-gnu -emit-llvm %s -O1 -o - | FileCheck %s 3*67e74705SXin Li 4*67e74705SXin Li // Check that we add an llvm.invariant.start to mark when a global becomes 5*67e74705SXin Li // read-only. If globalopt can fold the initializer, it will then mark the 6*67e74705SXin Li // variable as constant. 7*67e74705SXin Li 8*67e74705SXin Li // Do not produce markers at -O0. 9*67e74705SXin Li // CHECK-O0-NOT: llvm.invariant.start 10*67e74705SXin Li 11*67e74705SXin Li struct A { 12*67e74705SXin Li A(); 13*67e74705SXin Li int n; 14*67e74705SXin Li }; 15*67e74705SXin Li 16*67e74705SXin Li // CHECK: @a = global {{.*}} zeroinitializer 17*67e74705SXin Li extern const A a = A(); 18*67e74705SXin Li 19*67e74705SXin Li struct B { 20*67e74705SXin Li B(); 21*67e74705SXin Li mutable int n; 22*67e74705SXin Li }; 23*67e74705SXin Li 24*67e74705SXin Li // CHECK: @b = global {{.*}} zeroinitializer 25*67e74705SXin Li extern const B b = B(); 26*67e74705SXin Li 27*67e74705SXin Li struct C { 28*67e74705SXin Li C(); 29*67e74705SXin Li ~C(); 30*67e74705SXin Li int n; 31*67e74705SXin Li }; 32*67e74705SXin Li 33*67e74705SXin Li // CHECK: @c = global {{.*}} zeroinitializer 34*67e74705SXin Li extern const C c = C(); 35*67e74705SXin Li 36*67e74705SXin Li int f(); 37*67e74705SXin Li // CHECK: @d = global i32 0 38*67e74705SXin Li extern const int d = f(); 39*67e74705SXin Li e()40*67e74705SXin Livoid e() { 41*67e74705SXin Li static const A a = A(); 42*67e74705SXin Li } 43*67e74705SXin Li 44*67e74705SXin Li // CHECK: call void @_ZN1AC1Ev({{.*}}* nonnull @a) 45*67e74705SXin Li // CHECK: call {{.*}}@llvm.invariant.start(i64 4, i8* bitcast ({{.*}} @a to i8*)) 46*67e74705SXin Li 47*67e74705SXin Li // CHECK: call void @_ZN1BC1Ev({{.*}}* nonnull @b) 48*67e74705SXin Li // CHECK-NOT: call {{.*}}@llvm.invariant.start(i64 4, i8* bitcast ({{.*}} @b to i8*)) 49*67e74705SXin Li 50*67e74705SXin Li // CHECK: call void @_ZN1CC1Ev({{.*}}* nonnull @c) 51*67e74705SXin Li // CHECK-NOT: call {{.*}}@llvm.invariant.start(i64 4, i8* bitcast ({{.*}} @c to i8*)) 52*67e74705SXin Li 53*67e74705SXin Li // CHECK: call i32 @_Z1fv( 54*67e74705SXin Li // CHECK: store {{.*}}, i32* @d 55*67e74705SXin Li // CHECK: call {{.*}}@llvm.invariant.start(i64 4, i8* bitcast ({{.*}} @d to i8*)) 56*67e74705SXin Li 57*67e74705SXin Li // CHECK-LABEL: define void @_Z1ev( 58*67e74705SXin Li // CHECK: call void @_ZN1AC1Ev(%struct.A* nonnull @_ZZ1evE1a) 59*67e74705SXin Li // CHECK: call {{.*}}@llvm.invariant.start(i64 4, i8* {{.*}}bitcast ({{.*}} @_ZZ1evE1a to i8*)) 60*67e74705SXin Li // CHECK-NOT: llvm.invariant.end 61