llvm-mirror/cc-flags.ll at 44d510a3c63b4e562d6acee5dca487f47b840ae0 - llvm-mirror - Git.je (Gitea)

RPCS3/llvm-mirror

mirror of https://github.com/RPCS3/llvm-mirror.git synced 2024-11-23 03:02:36 +01:00

Adrian Prantl ae8d4fe15f Debug Info: Support DW_AT_calling_convention on composite types.

This implements the DWARF 5 feature described at
http://www.dwarfstd.org/ShowIssue.php?issue=141215.1

This allows a consumer to understand whether a composite data type is
trivially copyable and thus should be passed by value instead of by
reference. The canonical example is being able to distinguish the
following two types:

  // S is not trivially copyable because of the explicit destructor.
  struct S {
     ~S() {}
  };

  // T is a POD type.
  struct T {
     ~T() = default;
  };

This patch adds two new (DI)flags to LLVM metadata: TypePassByValue
and TypePassByReference.

<rdar://problem/36034922>
Differential Revision: https://reviews.llvm.org/D41743

llvm-svn: 321844

2018-01-05 01:13:37 +00:00

6 lines

220 B

LLVM

Raw Blame History

 ; RUN: not opt -S < %s 2>&1 | FileCheck %s
 !named = !{!0}
 !0 = !DICompositeType(tag: DW_TAG_structure_type, name: "A", size: 1, flags: DIFlagTypePassByReference | DIFlagTypePassByValue)
 ; CHECK: invalid reference flags