[DebugInfo] Add calling convention support for DWARF and CodeView
Summary:
Now DISubroutineType has a 'cc' field which should be a DW_CC_ enum. If
it is present and non-zero, the backend will emit it as a
DW_AT_calling_convention attribute. On the CodeView side, we translate
it to the appropriate enum for the LF_PROCEDURE record.
I added a new LLVM vendor specific enum to the list of DWARF calling
conventions. DWARF does not appear to attempt to standardize these, so I
assume it's OK to do this until we coordinate with GCC on how to emit
vectorcall convention functions.
Reviewers: dexonsmith, majnemer, aaboud, amccarth
Subscribers: mehdi_amini, llvm-commits
Differential Revision: http://reviews.llvm.org/D21114
llvm-svn: 272197
diff --git a/llvm/lib/Bitcode/Reader/BitcodeReader.cpp b/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
index 79d358a..0c28950 100644
--- a/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
+++ b/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
@@ -2409,17 +2409,18 @@
break;
}
case bitc::METADATA_SUBROUTINE_TYPE: {
- if (Record.size() != 3)
+ if (Record.size() < 3 || Record.size() > 4)
return error("Invalid record");
+ bool IsOldTypeRefArray = Record[0] < 2;
+ unsigned CC = (Record.size() > 3) ? Record[3] : 0;
IsDistinct = Record[0] & 0x1;
- bool IsOldTypeRefArray = Record[0] < 2;
Metadata *Types = getMDOrNull(Record[2]);
if (LLVM_UNLIKELY(IsOldTypeRefArray))
Types = MetadataList.upgradeTypeRefArray(Types);
MetadataList.assignValue(
- GET_OR_DISTINCT(DISubroutineType, (Context, Record[1], Types)),
+ GET_OR_DISTINCT(DISubroutineType, (Context, Record[1], CC, Types)),
NextMetadataNo++);
break;
}