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[DebugInfo] Add calling convention support for DWARF and CodeView

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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
This commit is contained in:
Reid Kleckner
2016-06-08 20:34:29 +00:00
parent 384d0f219d
commit de3d8b500f
21 changed files with 468 additions and 69 deletions
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7
llvm/lib/Bitcode/Reader/BitcodeReader.cpp
View File

@@ -2409,17 +2409,18 @@ std::error_code BitcodeReader::parseMetadata(bool ModuleLevel) {
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;
}