diff options
| author | Adrian Prantl <aprantl@apple.com> | 2017-04-26 23:44:54 +0000 |
|---|---|---|
| committer | Adrian Prantl <aprantl@apple.com> | 2017-04-26 23:44:54 +0000 |
| commit | 6c938e52256e7b818ce3418376e9492e5bf634d9 (patch) | |
| tree | 47f4b11046a4abc0a3eaa374cfdc2de1087fc7b8 /lib/Bitcode | |
| parent | 3e8c96253a70bf09ef0b911d04d3f02c464a6bf2 (diff) | |
Turn DISubprogram into a variable-length node.
DISubprogram currently has 10 pointer operands, several of which are
often nullptr. This patch reduces the amount of memory allocated by
DISubprogram by rearranging the operands such that containing type,
template params, and thrown types come last, and are only allocated
when they are non-null (or followed by non-null operands).
This patch also eliminates the entirely unused DisplayName operand.
This saves up to 4 pointer operands per DISubprogram. (I tried
measuring the effect on peak memory usage on an LTO link of an X86
llc, but the results were very noisy).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@301498 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Bitcode')
| -rw-r--r-- | lib/Bitcode/Reader/MetadataLoader.cpp | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/lib/Bitcode/Reader/MetadataLoader.cpp b/lib/Bitcode/Reader/MetadataLoader.cpp index 7ca2e167da0b..24fdca33c232 100644 --- a/lib/Bitcode/Reader/MetadataLoader.cpp +++ b/lib/Bitcode/Reader/MetadataLoader.cpp @@ -474,8 +474,8 @@ class MetadataLoader::MetadataLoaderImpl { for (auto CU_SP : CUSubprograms) if (auto *SPs = dyn_cast_or_null<MDTuple>(CU_SP.second)) for (auto &Op : SPs->operands()) - if (auto *SP = dyn_cast_or_null<MDNode>(Op)) - SP->replaceOperandWith(7, CU_SP.first); + if (auto *SP = dyn_cast_or_null<DISubprogram>(Op)) + SP->replaceUnit(CU_SP.first); CUSubprograms.clear(); } |