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AsmParser/Bitcode: Add support for MDLocation

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This adds assembly and bitcode support for `MDLocation`.  The assembly
side is rather big, since this is the first `MDNode` subclass (that
isn't `MDTuple`).  Part of PR21433.

(If you're wondering where the mountains of testcase updates are, we
don't need them until I update `DILocation` and `DebugLoc` to actually
use this class.)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225830 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan P. N. Exon Smith
2015-01-13 21:10:44 +00:00
parent 7c06364dc0
commit 3b0fe4ec0a
15 changed files with 284 additions and 5 deletions
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14
lib/Bitcode/Reader/BitcodeReader.cpp
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@ -1267,6 +1267,20 @@ std::error_code BitcodeReader::ParseMetadata() {
NextMDValueNo++);
break;
}
case bitc::METADATA_LOCATION: {
if (Record.size() != 5)
return Error("Invalid record");
auto get = Record[0] ? MDLocation::getDistinct : MDLocation::get;
unsigned Line = Record[1];
unsigned Column = Record[2];
MDNode *Scope = cast<MDNode>(MDValueList.getValueFwdRef(Record[3]));
Metadata *InlinedAt =
Record[4] ? MDValueList.getValueFwdRef(Record[4] - 1) : nullptr;
MDValueList.AssignValue(get(Context, Line, Column, Scope, InlinedAt),
NextMDValueNo++);
break;
}
case bitc::METADATA_STRING: {
std::string String(Record.begin(), Record.end());
llvm::UpgradeMDStringConstant(String);