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Check for trivial constructibility before emptiness in ARM ABI. According to the Itanium ABI (3.1.1), types with non-trivial copy constructors passed by value should be passed indirectly, with the caller creating a temporary. We got this mostly correct, but forgot that empty structs can have non-trivial constructors too and passed them incorrectly. This simply reverses the order of the check. llvm-svn: 184603
2013-06-22 06:49:34 +08:00
// RUN: %clang_cc1 -triple armv7-apple-ios -x c++ -emit-llvm -o - %s | FileCheck %s
ARM64: initial clang support commit. This adds Clang support for the ARM64 backend. There are definitely still some rough edges, so please bring up any issues you see with this patch. As with the LLVM commit though, we think it'll be more useful for merging with AArch64 from within the tree. llvm-svn: 205100
2014-03-29 23:09:45 +08:00
// RUN: %clang_cc1 -triple arm64-apple-ios -x c++ -emit-llvm -o - %s | FileCheck %s
Check for trivial constructibility before emptiness in ARM ABI. According to the Itanium ABI (3.1.1), types with non-trivial copy constructors passed by value should be passed indirectly, with the caller creating a temporary. We got this mostly correct, but forgot that empty structs can have non-trivial constructors too and passed them incorrectly. This simply reverses the order of the check. llvm-svn: 184603
2013-06-22 06:49:34 +08:00
// According to the Itanium ABI (3.1.1), types with non-trivial copy
// constructors passed by value should be passed indirectly, with the caller
// creating a temporary.
struct Empty;
struct Empty {
Empty(const Empty &e);
bool check();
};
bool foo(Empty e) {
// CHECK: @_Z3foo5Empty(%struct.Empty* %e)
// CHECK: call {{.*}} @_ZN5Empty5checkEv(%struct.Empty* %e)
return e.check();
}
void caller(Empty &e) {
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: @_Z6callerR5Empty(%struct.Empty* dereferenceable({{[0-9]+}}) %e)
Check for trivial constructibility before emptiness in ARM ABI. According to the Itanium ABI (3.1.1), types with non-trivial copy constructors passed by value should be passed indirectly, with the caller creating a temporary. We got this mostly correct, but forgot that empty structs can have non-trivial constructors too and passed them incorrectly. This simply reverses the order of the check. llvm-svn: 184603
2013-06-22 06:49:34 +08:00
// CHECK: call {{.*}} @_ZN5EmptyC1ERKS_(%struct.Empty* [[NEWTMP:%.*]], %struct.Empty*
// CHECK: call {{.*}} @_Z3foo5Empty(%struct.Empty* [[NEWTMP]])
foo(e);
}