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Implement IRGen for C++11's "T{1, 2, 3}", where T is an aggregate and the expression is treated as an lvalue. llvm-svn: 156781
2012-05-15 05:57:21 +08:00
// RUN: %clang_cc1 -std=c++11 -S -emit-llvm -o - %s -triple x86_64-linux-gnu | FileCheck %s
struct A { int a, b; int f(); };
// CHECK: define {{.*}}@_Z3fn1i(
int fn1(int x) {
// CHECK: %[[INITLIST:.*]] = alloca %struct.A
// CHECK: %[[A:.*]] = getelementptr inbounds %struct.A* %[[INITLIST]], i32 0, i32 0
// CHECK: store i32 %{{.*}}, i32* %[[A]], align 4
// CHECK: %[[B:.*]] = getelementptr inbounds %struct.A* %[[INITLIST]], i32 0, i32 1
// CHECK: store i32 5, i32* %[[B]], align 4
// CHECK: call i32 @_ZN1A1fEv(%struct.A* %[[INITLIST]])
return A{x, 5}.f();
}
struct B { int &r; int &f() { return r; } };
// CHECK: define {{.*}}@_Z3fn2Ri(
int &fn2(int &v) {
// CHECK: %[[INITLIST2:.*]] = alloca %struct.B, align 8
// CHECK: %[[R:.*]] = getelementptr inbounds %struct.B* %[[INITLIST2:.*]], i32 0, i32 0
// CHECK: store i32* %{{.*}}, i32** %[[R]], align 8
Mark C++ reference parameters as dereferenceable Because references must be initialized using some evaluated expression, they must point to something, and a callee can assume the reference parameter is dereferenceable. Taking advantage of a new attribute just added to LLVM, mark them as such. Because dereferenceability in addrspace(0) implies nonnull in the backend, we don't need both attributes. However, we need to know the size of the object to use the dereferenceable attribute, so for incomplete types we still emit only nonnull. llvm-svn: 213386
2014-07-18 23:52:10 +08:00
// CHECK: call dereferenceable({{[0-9]+}}) i32* @_ZN1B1fEv(%struct.B* %[[INITLIST2:.*]])
Implement IRGen for C++11's "T{1, 2, 3}", where T is an aggregate and the expression is treated as an lvalue. llvm-svn: 156781
2012-05-15 05:57:21 +08:00
return B{v}.f();
}
A non-trivial array-fill expression isn't necessarily a CXXConstructExpr. It could be an InitListExpr that runs constructors in C++11 onwards. Fixes a recent regression (introduced in r210091). llvm-svn: 210954
2014-06-14 07:04:49 +08:00
// CHECK: define {{.*}}@__cxx_global_var_init(
//
// CHECK: call {{.*}}@_ZN14NonTrivialInit1AC1Ev(
// CHECK: getelementptr inbounds {{.*}}, i64 1
// CHECK: br i1
//
// CHECK: getelementptr inbounds {{.*}}, i64 1
// CHECK: icmp eq {{.*}}, i64 30
// CHECK: br i1
//
// CHECK: call i32 @__cxa_atexit(
namespace NonTrivialInit {
struct A { A(); A(const A&) = delete; ~A(); };
struct B { A a[20]; };
// NB, this must be large enough to be worth memsetting for this test to be
// meaningful.
B b[30] = {};
}