diff options
| author | Duncan P. N. Exon Smith <dexonsmith@apple.com> | 2016-03-25 14:40:18 +0000 |
|---|---|---|
| committer | Duncan P. N. Exon Smith <dexonsmith@apple.com> | 2016-03-25 14:40:18 +0000 |
| commit | d7084fcebdf0472c40d5a2a62d56e688969c206a (patch) | |
| tree | 6d7e65d15cf4a2f244755f3b3485af597acc593b /tools/llvm-bcanalyzer | |
| parent | 696350790fcaefaa85a301b57d73b670a08e4c99 (diff) | |
Bitcode: Collect all MDString records into a single blob
Optimize output of MDStrings in bitcode. This emits them in big blocks
(currently 1024) in a pair of records:
- BULK_STRING_SIZES: the sizes of the strings in the block, and
- BULK_STRING_DATA: a single blob, which is the concatenation of all
the strings.
Inspired by Mehdi's similar patch, http://reviews.llvm.org/D18342, this
should (a) slightly reduce bitcode size, since there is less record
overhead, and (b) greatly improve reading speed, since blobs are super
cheap to deserialize.
I needed to add support for blobs to streaming input to get the test
suite passing.
- StreamingMemoryObject::getPointer reads ahead and returns the
address of the blob.
- To avoid a possible reallocation of StreamingMemoryObject::Bytes,
BitstreamCursor::readRecord needs to move the call to JumpToEnd
forward so that getPointer is the last bitstream operation.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@264409 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'tools/llvm-bcanalyzer')
| -rw-r--r-- | tools/llvm-bcanalyzer/llvm-bcanalyzer.cpp | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/tools/llvm-bcanalyzer/llvm-bcanalyzer.cpp b/tools/llvm-bcanalyzer/llvm-bcanalyzer.cpp index 32179c168de..8560cf79446 100644 --- a/tools/llvm-bcanalyzer/llvm-bcanalyzer.cpp +++ b/tools/llvm-bcanalyzer/llvm-bcanalyzer.cpp @@ -312,7 +312,9 @@ static const char *GetCodeName(unsigned CodeID, unsigned BlockID, case bitc::METADATA_BLOCK_ID: switch(CodeID) { default:return nullptr; - STRINGIFY_CODE(METADATA, STRING) + STRINGIFY_CODE(METADATA, STRING_OLD) + STRINGIFY_CODE(METADATA, BULK_STRING_SIZES) + STRINGIFY_CODE(METADATA, BULK_STRING_DATA) STRINGIFY_CODE(METADATA, NAME) STRINGIFY_CODE(METADATA, KIND) // Older bitcode has it in a MODULE_BLOCK STRINGIFY_CODE(METADATA, NODE) |