This was causing an assert on invalid in the modified test case.

Will be used for a front-end compiler
https://github.com/GPUOpen-Drivers/llpc
to insert a binary blob value into AMDGPU PAL metadata.

Differential Revision: https://reviews.llvm.org/D148607

Change-Id: I90685883d1478335937218e6b1a569b1b26dc05a

This commit increases the convenience of using the MsgPackDocument API,
especially when creating a document for writing out.

It adds direct assignment of bool, integer and string types to a
DocNode, as long as that DocNode is already inside a document, e.g. the
result of a map lookup. It also adds map lookup given an integer type
(it already had that for string).

So, to assign a string to a map element whose key is an int, you can
now write
  MyMap[42] = "towel";
instead of
  MyMap[MyMap.getDocument()->getNode(42)] =
      MyMap.getDocument()->getNode("towel");

Also added MapDocNode::erase methods.

Differential Revision: https://reviews.llvm.org/D80121

Change-Id: I17301fa15bb9802231c52542798af5b54beb583e

The readFromBlob method can now be used to read MsgPack into a Document
that already contains something, merging the two. There is a new Merger
argument to readFromBlob, a callback function to resolve conflicts.

Differential Revision: https://reviews.llvm.org/D79671

Change-Id: Icf3e959217fe33cd907a41516c0386aef2847c0c

Summary:
A class that exposes a simple in-memory representation of a document of
MsgPack objects, that can be read from and written to MsgPack, read from
and written to YAML, and inspected and modified in memory. This is
intended to be a lighter-weight (in terms of memory allocations)
replacement for MsgPackTypes.

Two subsequent changes will:
1. switch AMDGPU HSA metadata to using MsgPackDocument instead of
   MsgPackTypes;
2. add MsgPack AMDGPU PAL metadata via MsgPackDocument.

Differential Revision: https://reviews.llvm.org/D57023

Change-Id: Ie15a054831d5a6467c5867c064c8f8f6b80270e1
llvm-svn: 356080