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
diff --git a/llvm/include/llvm-c/DebugInfo.h b/llvm/include/llvm-c/DebugInfo.h
index d17c690..a5e5653 100644
--- a/llvm/include/llvm-c/DebugInfo.h
+++ b/llvm/include/llvm-c/DebugInfo.h
@@ -52,6 +52,8 @@
LLVMDIFlagBitField = 1 << 19,
LLVMDIFlagNoReturn = 1 << 20,
LLVMDIFlagMainSubprogram = 1 << 21,
+ LLVMDIFlagTypePassByValue = 1 << 22,
+ LLVMDIFlagTypePassByReference = 1 << 23,
LLVMDIFlagIndirectVirtualBase = (1 << 2) | (1 << 5),
LLVMDIFlagAccessibility = LLVMDIFlagPrivate | LLVMDIFlagProtected |
LLVMDIFlagPublic,