LLVM Component Refactor TODO

File Sizes

File sizes on Linux x64 Release mode (not bundling into a monolithic libLLVM.so):

`lib/`:

```
28K     lib/BugpointPasses.so                                                                                                                                                        28K     lib/Bye.so                                                                                                                                                                   16K     lib/LLVMHello.so                                                                                                                                                             8.0K    lib/libEngine.so                                                                                                                                                             116K    lib/libLLVMAggressiveInstCombine.so                                                                                                                                          7.0M    lib/libLLVMAnalysis.so                                                                                                                                                       624K    lib/libLLVMAsmParser.so                                                                                                                                                      1.5M    lib/libLLVMAsmPrinter.so
160K    lib/libLLVMBinaryFormat.so
624K    lib/libLLVMBitReader.so
472K    lib/libLLVMBitWriter.so
52K     lib/libLLVMBitstreamReader.so
36K     lib/libLLVMCFGuard.so
8.7M    lib/libLLVMCodeGen.so
5.2M    lib/libLLVMCore.so
472K    lib/libLLVMCoroutines.so
320K    lib/libLLVMCoverage.so
300K    lib/libLLVMDWARFLinker.so
912K    lib/libLLVMDebugInfoCodeView.so
760K    lib/libLLVMDebugInfoDWARF.so
188K    lib/libLLVMDebugInfoGSYM.so
96K     lib/libLLVMDebugInfoMSF.so
1.2M    lib/libLLVMDebugInfoPDB.so
340K    lib/libLLVMDemangle.so
24K     lib/libLLVMDlltoolDriver.so
192K    lib/libLLVMExecutionEngine.so
8.0K    lib/libLLVMExtensions.so
200K    lib/libLLVMFileCheck.so
16K     lib/libLLVMFrontendOpenACC.so
256K    lib/libLLVMFrontendOpenMP.so
172K    lib/libLLVMFuzzMutate.so
1.4M    lib/libLLVMGlobalISel.so
8.0K    lib/libLLVMHelloNew.so
3.6M    lib/libLLVMIPO.so
32K     lib/libLLVMIRReader.so
1.6M    lib/libLLVMInstCombine.so
1.6M    lib/libLLVMInstrumentation.so
128K    lib/libLLVMInterfaceStub.so
240K    lib/libLLVMInterpreter.so
468K    lib/libLLVMJITLink.so
556K    lib/libLLVMLTO.so
60K     lib/libLLVMLibDriver.so
16K     lib/libLLVMLineEditor.so
216K    lib/libLLVMLinker.so
1.3M    lib/libLLVMMC.so
232K    lib/libLLVMMCA.so
32K     lib/libLLVMMCDisassembler.so
80K     lib/libLLVMMCJIT.so
584K    lib/libLLVMMCParser.so
336K    lib/libLLVMMIRParser.so
260K    lib/libLLVMObjCARC.so
1.6M    lib/libLLVMObject.so
1.9M    lib/libLLVMObjectYAML.so
92K     lib/libLLVMOption.so
1.6M    lib/libLLVMOrcJIT.so
28K     lib/libLLVMOrcShared.so
16K     lib/libLLVMOrcTargetProcess.so
2.2M    lib/libLLVMPasses.so
520K    lib/libLLVMProfileData.so
240K    lib/libLLVMRemarks.so
780K    lib/libLLVMRuntimeDyld.so
5.2M    lib/libLLVMScalar.so
4.0M    lib/libLLVMSelectionDAG.so
2.4M    lib/libLLVMSupport.so
128K    lib/libLLVMSymbolize.so
536K    lib/libLLVMTableGen.so
72K     lib/libLLVMTarget.so
11M     lib/libLLVMTargetX86.so
208K    lib/libLLVMTextAPI.so
3.1M    lib/libLLVMTransformUtils.so
1.8M    lib/libLLVMVectorize.so
16K     lib/libLLVMWindowsManifest.so
284K    lib/libLLVMXRay.so
```

`bin/`:

```
636K    bin/FileCheck
512K    bin/bugpoint
8.0K    bin/count
324K    bin/dsymutil
116K    bin/llc
356K    bin/lli
504K    bin/lli-child-target
20K     bin/llvm-PerfectShuffle
0       bin/llvm-addr2line
96K     bin/llvm-ar
36K     bin/llvm-as
28K     bin/llvm-bcanalyzer
0       bin/llvm-bitcode-strip
112K    bin/llvm-c-test
40K     bin/llvm-cat
144K    bin/llvm-cfi-verify
56K     bin/llvm-config
388K    bin/llvm-cov
40K     bin/llvm-cvtres
92K     bin/llvm-cxxdump
44K     bin/llvm-cxxfilt
48K     bin/llvm-cxxmap
100K    bin/llvm-diff
52K     bin/llvm-dis
0       bin/llvm-dlltool
168K    bin/llvm-dwarfdump
108K    bin/llvm-dwp
56K     bin/llvm-elfabi
33M     bin/llvm-exegesis
64K     bin/llvm-extract
88K     bin/llvm-gsymutil
72K     bin/llvm-ifs
0       bin/llvm-install-name-tool
36K     bin/llvm-isel-fuzzer
8.0K    bin/llvm-itanium-demangle-fuzzer
628K    bin/llvm-jitlink
1.5M    bin/llvm-jitlink-executor
0       bin/llvm-lib
108K    bin/llvm-libtool-darwin
80K     bin/llvm-link
104K    bin/llvm-lipo
4.0K    bin/llvm-lit
16K     bin/llvm-locstats
156K    bin/llvm-lto
104K    bin/llvm-lto2
104K    bin/llvm-mc
216K    bin/llvm-mca
8.0K    bin/llvm-microsoft-demangle-fuzzer
56K     bin/llvm-ml
32K     bin/llvm-modextract
32K     bin/llvm-mt
188K    bin/llvm-nm
904K    bin/llvm-objcopy
884K    bin/llvm-objdump
76K     bin/llvm-opt-fuzzer
68K     bin/llvm-opt-report
1.2M    bin/llvm-pdbutil
272K    bin/llvm-profdata
220K    bin/llvm-profgen
0       bin/llvm-ranlib
220K    bin/llvm-rc
0       bin/llvm-readelf
2.2M    bin/llvm-readobj
196K    bin/llvm-reduce
136K    bin/llvm-rtdyld
108K    bin/llvm-size
8.0K    bin/llvm-special-case-list-fuzzer
24K     bin/llvm-split
68K     bin/llvm-stress
40K     bin/llvm-strings
0       bin/llvm-strip
64K     bin/llvm-symbolizer
4.2M    bin/llvm-tblgen
28K     bin/llvm-undname
600K    bin/llvm-xray
12K     bin/llvm-yaml-numeric-parser-fuzzer
12K     bin/llvm-yaml-parser-fuzzer
64K     bin/mlir-capi-ir-test
12K     bin/mlir-capi-pass-test
9.5M    bin/mlir-cpu-runner
4.7M    bin/mlir-edsc-builder-api-test
768K    bin/mlir-linalg-ods-gen
18M     bin/mlir-opt
11M     bin/mlir-reduce
708K    bin/mlir-sdbm-api-test
1.7M    bin/mlir-tblgen
5.3M    bin/mlir-translate
192K    bin/not
7.5M    bin/obj2yaml
380K    bin/opt
152K    bin/sancov
28K     bin/sanstats
32K     bin/split-file
72K     bin/verify-uselistorder
416K    bin/yaml-bench
2.4M    bin/yaml2obj
```

TODO.md

• LLVMSupport

  • Verify where LLVM_SYSTEM_LIBS property goes
  • Test z3 dep

• Rename bare target components to LLVMTarget${t}

  • Verify that collapsing sub-target libraries is ok (works, but not sure how people feel)
  • Fix non-X86 target component names
  • Remove non-X86 internal circular references (flagged by cmake if you get it wrong)

• LLVM_HAS_JIT handling (switch between jit and interpreter)

  • See fixups in LLVM-Build.cmake LLVMBuildResolveComponentsLink (deleted now)

• LLVMBuildGenerateCFragment porting (see commented out at bottom of llvm/lib/CMakeLists.txt)

• tools/llvm-config porting (tests currently failing)

• Remove exceptions for improperly referenced components (quite a few references so just special casing to avoid ballooning one patch):

  • ScalarOpts -> Scalar
  • ObjCARCOpts -> ObjCARC

• Scrub through necessary features in llvm_add_library and make sure that llvm_add_component_library is doing the right thing. Non exhaustive list:

  • RPath handling for install
  • SO_NAME/version symlinks
  • Entitlements
  • Externalized debug

• Implement the existing libLLVM.so library redirection (i.e. to bundle multiple components together).

• Look more closely at tools that can only be linked statically (llvm-exegesis uses library internals that are hidden in shared libraries, for example).