llvm-project/clang/test/CodeGenCXX/derived-to-virtual-base-cla...

// RUN: %clang_cc1 %s -triple %itanium_abi_triple -emit-llvm -o - | FileCheck %s

struct A { int i; };
struct B { char j; };
struct C : A, B { int k; };

struct D final : virtual C { 
  D(); 
  virtual void f();
};

// CHECK-LABEL: define dereferenceable({{[0-9]+}}) %struct.B* @_Z1fR1D
B &f(D &d) {
  // CHECK-NOT: load i8*, i8**
  return d;
}
Remove the -cxx-abi command-line flag. This makes the C++ ABI depend entirely on the target: MS ABI for -win32 triples, Itanium otherwise. It's no longer possible to do weird combinations. To be able to run a test with a specific ABI without constraining it to a specific triple, new substitutions are added to lit: %itanium_abi_triple and %ms_abi_triple can be used to get the current target triple adjusted to the desired ABI. For example, if the test suite is running with the i686-pc-win32 target, %itanium_abi_triple will expand to i686-pc-mingw32. Differential Revision: http://llvm-reviews.chandlerc.com/D2545 llvm-svn: 199250 2014-01-15 03:35:09 +08:00			`// RUN: %clang_cc1 %s -triple %itanium_abi_triple -emit-llvm -o - \| FileCheck %s`
When doing a derived-to-base class through a virtual class, we don't have to get the vbase offset from the vtable if the derived class is marked final. llvm-svn: 124523 2011-01-29 11:18:56 +08:00
			`struct A { int i; };`
Cleanup tests, no functionality change. llvm-svn: 129672 2011-04-18 05:49:47 +08:00			`struct B { char j; };`
When doing a derived-to-base class through a virtual class, we don't have to get the vbase offset from the vtable if the derived class is marked final. llvm-svn: 124523 2011-01-29 11:18:56 +08:00			`struct C : A, B { int k; };`

			`struct D final : virtual C {`
			`D();`
			`virtual void f();`
			`};`

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-LABEL: define dereferenceable({{[0-9]+}}) %struct.B* @_Z1fR1D`
When doing a derived-to-base class through a virtual class, we don't have to get the vbase offset from the vtable if the derived class is marked final. llvm-svn: 124523 2011-01-29 11:18:56 +08:00			`B &f(D &d) {`
Update Clang tests to handle explicitly typed load changes in LLVM. llvm-svn: 230795 2015-02-28 05:19:58 +08:00			`// CHECK-NOT: load i8, i8*`
When doing a derived-to-base class through a virtual class, we don't have to get the vbase offset from the vtable if the derived class is marked final. llvm-svn: 124523 2011-01-29 11:18:56 +08:00			`return d;`
			`}`