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| author | Matthew Voss <matthew.voss@sony.com> | 2023-07-05 14:17:20 -0700 |
|---|---|---|
| committer | Matthew Voss <matthew.voss@sony.com> | 2023-07-05 14:53:14 -0700 |
| commit | a1ca3af31eeec61cfb9d619f55b655b0eb0b9494 (patch) | |
| tree | f7127bd5940108b5fec1690ab872425afcb244a2 /llvm/lib/Bitcode/Writer | |
| parent | 156913cb776438f87bd1580de862eac7be79ca2a (diff) | |
| download | llvm-a1ca3af31eeec61cfb9d619f55b655b0eb0b9494.zip llvm-a1ca3af31eeec61cfb9d619f55b655b0eb0b9494.tar.gz llvm-a1ca3af31eeec61cfb9d619f55b655b0eb0b9494.tar.bz2 | |
[llvm] A Unified LTO Bitcode Frontend
Here's a high level summary of the changes in this patch. For more
information on rational, see the RFC.
(https://discourse.llvm.org/t/rfc-a-unified-lto-bitcode-frontend/61774).
- Add config parameter to LTO backend, specifying which LTO mode is
desired when using unified LTO.
- Add unified LTO flag to the summary index for efficiency. Unified
LTO modules can be detected without parsing the module.
- Make sure that the ModuleID is generated by incorporating more types
of symbols.
Differential Revision: https://reviews.llvm.org/D123803
Diffstat (limited to 'llvm/lib/Bitcode/Writer')
| -rw-r--r-- | llvm/lib/Bitcode/Writer/BitcodeWriter.cpp | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp b/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp index bedae66..f2bfb4e 100644 --- a/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp +++ b/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp @@ -4086,6 +4086,9 @@ void ModuleBitcodeWriterBase::writePerModuleGlobalValueSummary() { // Bits 1-3 are set only in the combined index, skip them. if (Index->enableSplitLTOUnit()) Flags |= 0x8; + if (Index->hasUnifiedLTO()) + Flags |= 0x200; + Stream.EmitRecord(bitc::FS_FLAGS, ArrayRef<uint64_t>{Flags}); if (Index->begin() == Index->end()) { @@ -4112,7 +4115,7 @@ void ModuleBitcodeWriterBase::writePerModuleGlobalValueSummary() { auto Abbv = std::make_shared<BitCodeAbbrev>(); Abbv->Add(BitCodeAbbrevOp(bitc::FS_PERMODULE_PROFILE)); Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // valueid - Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // flags + Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // flags Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // instcount Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 4)); // fflags Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 4)); // numrefs |