Add an index for Module Metadata record in the bitcode
Summary:
This index record the position for each metadata record in
the bitcode, so that the reader will be able to lazy-load
on demand each individual record.
We also make sure that every abbrev is emitted upfront so
that the block can be skipped while reading.
I don't plan to commit this before having the reader
counterpart, but I figured this can be reviewed mostly
independently.
Reviewers: pcc, tejohnson
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D28083
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@290684 91177308-0d34-0410-b5e6-96231b3b80d8
9 files changed