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PR23373: A defaulted union copy constructor that is not trivial must still be emitted as a memcpy. llvm-svn: 236142
2015-04-30 03:26:57 +08:00
// RUN: %clang_cc1 -triple %itanium_abi_triple -std=c++11 -emit-llvm -o - %s | FileCheck %s
union PR23373 {
PR23373(PR23373&) = default;
PR23373 &operator=(PR23373&) = default;
int n;
float f;
};
extern PR23373 pr23373_a;
PR23373 pr23373_b(pr23373_a);
// CHECK-LABEL: define {{.*}} @__cxx_global_var_init(
Revert "Change memcpy/memset/memmove to have dest and source alignments." This reverts commit r253512. This likely broke the bots in: http://lab.llvm.org:8011/builders/clang-ppc64-elf-linux2/builds/20202 http://bb.pgr.jp/builders/clang-3stage-i686-linux/builds/3787 llvm-svn: 253542
2015-11-19 13:55:59 +08:00
// CHECK: call void @llvm.memcpy.p0i8.p0i8.{{i32|i64}}({{.*}} @pr23373_b{{.*}}, {{.*}} @pr23373_a{{.*}}, [[W:i32|i64]] 4, i32 4, i1 false)
PR23373: A defaulted union copy constructor that is not trivial must still be emitted as a memcpy. llvm-svn: 236142
2015-04-30 03:26:57 +08:00
PR23373 pr23373_f() { return pr23373_a; }
// CHECK-LABEL: define {{.*}} @_Z9pr23373_fv(
Revert "Change memcpy/memset/memmove to have dest and source alignments." This reverts commit r253512. This likely broke the bots in: http://lab.llvm.org:8011/builders/clang-ppc64-elf-linux2/builds/20202 http://bb.pgr.jp/builders/clang-3stage-i686-linux/builds/3787 llvm-svn: 253542
2015-11-19 13:55:59 +08:00
// CHECK: call void @llvm.memcpy.p0i8.p0i8.[[W]]({{.*}}, [[W]] 4, i32 4, i1 false)
PR23373: A defaulted union copy constructor that is not trivial must still be emitted as a memcpy. llvm-svn: 236142
2015-04-30 03:26:57 +08:00
void pr23373_g(PR23373 &a, PR23373 &b) { a = b; }
// CHECK-LABEL: define {{.*}} @_Z9pr23373_g
Revert "Change memcpy/memset/memmove to have dest and source alignments." This reverts commit r253512. This likely broke the bots in: http://lab.llvm.org:8011/builders/clang-ppc64-elf-linux2/builds/20202 http://bb.pgr.jp/builders/clang-3stage-i686-linux/builds/3787 llvm-svn: 253542
2015-11-19 13:55:59 +08:00
// CHECK: call void @llvm.memcpy.p0i8.p0i8.[[W]]({{.*}}, [[W]] 4, i32 4, i1 false)
Fix for PR5707: make sure implicit copy constructors initialize the vtable pointer. llvm-svn: 90840
2009-12-08 14:46:18 +08:00
struct A { virtual void a(); };
A x(A& y) { return y; }
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: define linkonce_odr {{.*}} @_ZN1AC1ERKS_(%struct.A* {{.*}}%this, %struct.A* dereferenceable({{[0-9]+}})) unnamed_addr
CodeGen: Use 32-bit gep offsets to address vtable address points. The relative vtable ABI will use a struct rather than an array as the type of a vtable. LLVM only allows 32-bit integers as struct indices, so we need to use 32-bit integers to get addresses of address points. In order to keep the code simple, we might as well do that unconditionally. It's probably a reasonable implementation limit to support no more than 2 billion virtual functions per class. This change causes quite a bit of churn in the test suite, so I'm making it separately. Differential Revision: http://reviews.llvm.org/D18113 llvm-svn: 263469
2016-03-15 03:07:10 +08:00
// CHECK: store i32 (...)** bitcast (i8** getelementptr inbounds ([3 x i8*], [3 x i8*]* @_ZTV1A, i32 0, i32 2) to i32 (...)**)