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ROSE upstream sync for REX

Canonical upstream source: https://github.com/llnl/rose.git

Upstream ROSE is read-only evidence for REX. Agents may fetch, inspect logs, show commits, and compare diffs. Agents must never push to upstream ROSE, open upstream PRs/issues/comments, request upstream reviews, or mention upstream maintainers. Any sync PR is a REX PR only.

Support target (REX)

  • Platform: Linux only (non-Linux platforms dropped).
  • Languages/features: C/C++, Fortran, OpenMP, OpenACC, OpenCL, CUDA.
  • Frontend: Clang/LLVM for C/C++ (LLVM 22); Fortran via Flang.
  • Hard dropped: PHP, JavaScript, Python, Ada, Jovial, EDG, OFP/old Fortran parser, Java/ECJ, UPC, X10, Csharp, Matlab, YAML/mini-yaml, binary analysis, Sawyer, CodeThorn, Rosebud source tree, legacy autotools/Tup paths, dropped OpenMP designs, src/3rdPartyLibraries, and other legacy frontends/tools.
  • Rosebud: do not restore src/Rosebud. If an upstream Rosebud commit contains an idea useful to existing REX ROSETTA code, port only that retained-scope logic manually.
  • Legacy array test suites are dropped from CompileTests and CompilerOptionsTests inventories.

Non-negotiable rules

  • For sync tasks, use .codex/skills/rose-upstream-sync/SKILL.md.
  • Scripts may inventory, classify, guard, and update records. They must not be used to bulk-apply code without per-commit review.
  • Commit log must only reference upstream rose/weekly history; never use local REX history for log entries (always run git log rose/weekly ... when enumerating commits).
  • Before logging any commit, verify the SHA exists in rose/weekly (e.g., git merge-base --is-ancestor <sha> rose/weekly); if not, do not log it.
  • If a commit is marked pick, apply the code change immediately (before moving on).
  • If a pick is already present in REX, record that in the Notes column and set the REX commit column to the existing REX commit when known.
  • Decision order is strict: verify upstream SHA -> decide pick/drop -> apply (if pick) -> validate -> commit -> update commit log immediately.
  • One-commit policy is strict: every applied upstream commit or tightly related upstream series maps to one final REX commit. That commit contains both the useful upstream content and any required REX-specific adaptation.
  • Do not add later fixup commits for sync-caused build or test regressions. Find the offending REX sync commit, amend it, rebase later sync commits, rerun gates, and refresh CSV REX commit mappings to the rewritten final SHAs.
  • Do not advance past a code/build/test-affecting pick or pick-partial with unbuilt code. Build after each such commit, run focused CTest gates after risky commits or small related batches, and run full CTest before PR.
  • Keep list below is authoritative; only those paths are eligible for sync.
  • Drop list below is authoritative; never reintroduce dropped paths or platforms.
  • Autotools/Tup are inventory only: do not port into CMake.
  • Preserve REX pruning decisions; do not reintroduce Boost-only subsystems or removed frontends.
  • Preserve REX modernizations that removed deprecated C++ template patterns; do not reintroduce those warning-prone constructs.
  • Release/version commits update only ROSE_VERSION and config/SCM_DATE, and only for the latest version marker in a completed sync range. Never restore configure.ac or src/frontend/CxxFrontend/EDG_VERSION.
  • Version numbering must follow upstream ROSE consistently in every REX encoding/validation site. For current three-component ROSE versions, the encoded SCM_DATE is major * 10000000 + minor * 100 + patch (for example, 2.1.0 -> 20000100), not a hand-adjusted local value.
  • Applied sync commits should be created with git cherry-pick -n plus manual git commit so REX hooks run normal staged formatting. Do not run broad formatting sweeps or touch tests/reference files for formatting-only churn.
  • Keep an untracked scratch ledger under build/upstream-sync/ while rewriting sync commits. Write the tracked docs/upstream-sync/rose-YYYY-commits.csv only after final REX commit SHAs are stable.
  • Merge completed sync PRs with rebase so the individual REX sync commit IDs recorded in docs/upstream-sync/rose-YYYY-commits.csv remain true on main. Do not squash sync PRs unless the CSV mappings are intentionally rewritten to the resulting final commits before the merge is considered complete.
  • Treat REX commit IDs in the CSV as branch-shape dependent. Any rebase of a sync branch changes those local commit IDs, so audit and refresh the affected CSV rows after the last rebase and before the PR is considered ready. If a commit-ID mismatch is found only after merge, fix the CSV mapping in a documentation follow-up PR instead of leaving known-bad historical records.
  • Upstream ROSE tests may be private, absent, or dropped from REX scope. For synced retained behavior that needs local coverage and has no usable upstream public test, add focused REX-owned tests in a follow-up PR using the normal rex_<area>_<behavior>.<ext> naming rule. If the test is required to prove the sync commit itself is correct before landing, amend it into the owning sync commit instead.
  • Helper scripts must not leave Python cache files in the source tree. Use a temporary pycache_prefix for explicit compile checks.
  • Flang parse-tree snapshots are upstream-generated and may contain host-specific #line markers (e.g., apple-darwin); keep them unchanged since they are not platform-support code.

Root files (keep list + sync status)

Status legend: pending / in-progress / synced / inventory / skip - pending .gitignore - pending .gitmodules - pending AGENTS.md - pending BUILDING_WITH_CLANG.md - pending CLAUDE.md - in-progress CMakeLists.txt - pending COPYRIGHT - pending FORTRAN_TESTING_GUIDE.md - pending GEMINI.md - inventory Makefile.am - pending OPENMP_SUPPORT.md - pending README.md - pending ROSE_COMPILER_FIXES.md - pending ROSE_VERSION - inventory configure.ac - pending build-rex.sh - pending rose_config.h.in.cmake - inventory stamp-h.in - inventory stamp-h1.in - pending test_omp_normal.c - pending test_omp_space_after_hash.c - pending test_omp_spaces.c

Directory inventory (keep list + sync status)

Default status for all entries is pending. Update individual lines as each directory is fully synced.

pending .claude
pending .claude/commands
pending .gemini
pending .github
pending .github/workflows
pending LicenseInformation
skip lib
inventory acmacros
skip build
skip CMakeFiles
pending cmake
pending cmake/modules
inventory config
pending docs
pending docs/Rose
pending docs/Rose/AstProcessing
pending docs/Rose/ToolDevelopment
pending docs/Rose/Tutorial
pending docs/Rose/powerpoints
pending docs/Rosetta
pending docs/readmes
pending docs/todos
in-progress docs/upstream-sync
pending exampleTranslators
pending exampleTranslators/AstCopyReplTester
pending exampleTranslators/DOTGenerator
pending exampleTranslators/PDFGenerator
pending exampleTranslators/defaultTranslator
pending exampleTranslators/documentedExamples
pending exampleTranslators/documentedExamples/astProcessingExamples
pending exampleTranslators/documentedExamples/astProcessingExamples/printLoopInfo
pending exampleTranslators/documentedExamples/astProcessingExamples/printVars
pending exampleTranslators/documentedExamples/simpleTranslatorExamples
pending exampleTranslators/graphicalUserInterfaceExamples
pending exampleTranslators/graphicalUserInterfaceExamples/attributes
pending exampleTranslators/graphicalUserInterfaceExamples/layout
pending exampleTranslators/graphicalUserInterfaceExamples/query
pending exampleTranslators/graphicalUserInterfaceExamples/slicing
pending scripts
pending scripts/buildExampleRoseWorkspaceDirectory
pending scripts/buildExampleRoseWorkspaceDirectory/config
pending scripts/cgi-bin
pending scripts/configuration
pending scripts/installation
pending scripts/policies
pending src
in-progress src/AstNodes
in-progress src/AstNodes/Expression
skip src/AstNodes/BinaryAnalysis
skip src/AstNodes/Jovial
skip src/3rdPartyLibraries
in-progress src/ROSETTA
in-progress src/ROSETTA/Grammar
in-progress src/ROSETTA/src
pending src/ROSETTA/src/scripts
pending src/Rose
pending src/backend
in-progress src/backend/unparser
in-progress src/backend/unparser/CxxCodeGeneration
pending src/backend/unparser/FortranCodeGeneration
in-progress src/backend/unparser/formatSupport
in-progress src/backend/unparser/languageIndependenceSupport
in-progress src/frontend
in-progress src/frontend/Clang
in-progress src/frontend/Flang
in-progress src/frontend/Flang/builder
in-progress src/frontend/Flang/driver
synced src/frontend/Flang/intrinsics
in-progress src/frontend/SageIII
pending src/frontend/SageIII/GENERATED_CODE_DIRECTORY_Cxx_Grammar
pending src/frontend/SageIII/accparser
pending src/frontend/SageIII/astFixup
pending src/frontend/SageIII/astHiddenTypeAndDeclarationLists
pending src/frontend/SageIII/astPostProcessing
in-progress src/frontend/SageIII/astTokenStream
pending src/frontend/SageIII/docs
pending src/frontend/SageIII/includeDirectivesProcessing
pending src/frontend/SageIII/ompparser
in-progress src/frontend/SageIII/sageInterface
in-progress src/frontend/SageIII/sage_support
pending src/frontend/SageIII/virtualCFG
skip src/integration
skip src/integration/ROSE-LLVM-connection
pending src/midend
pending src/midend/abstractLayer
pending src/midend/astDiagnostics
pending src/midend/astDump
pending src/midend/astProcessing
pending src/midend/astQuery
pending src/midend/astUtil
pending src/midend/astUtil/annotation
pending src/midend/astUtil/astInterface
pending src/midend/astUtil/astSupport
pending src/midend/astUtil/symbolicVal
pending src/midend/programAnalysis
pending src/midend/programAnalysis/CFG
pending src/midend/programAnalysis/CallGraphAnalysis
pending src/midend/programAnalysis/OAWrap
pending src/midend/programAnalysis/OpenAnalysis
pending src/midend/programAnalysis/OpenAnalysis/CFG
pending src/midend/programAnalysis/OpenAnalysis/CallGraph
pending src/midend/programAnalysis/OpenAnalysis/Interface
pending src/midend/programAnalysis/OpenAnalysis/SSA
pending src/midend/programAnalysis/OpenAnalysis/Utils
pending src/midend/programAnalysis/VirtualFunctionAnalysis
pending src/midend/programAnalysis/bitvectorDataflow
pending src/midend/programAnalysis/dataflowAnalysis
pending src/midend/programAnalysis/defUseAnalysis
pending src/midend/programAnalysis/dominanceAnalysis
pending src/midend/programAnalysis/genericDataflow
pending src/midend/programAnalysis/genericDataflow/analysis
pending src/midend/programAnalysis/genericDataflow/arrIndexLabeler
pending src/midend/programAnalysis/genericDataflow/cfgUtils
pending src/midend/programAnalysis/genericDataflow/lattice
pending src/midend/programAnalysis/genericDataflow/rwAccessLabeler
pending src/midend/programAnalysis/genericDataflow/simpleAnalyses
pending src/midend/programAnalysis/genericDataflow/state
pending src/midend/programAnalysis/genericDataflow/variables
pending src/midend/programAnalysis/pointerAnal
pending src/midend/programAnalysis/staticInterproceduralSlicing
pending src/midend/programAnalysis/valuePropagation
pending src/midend/programAnalysis/variableRenaming
pending src/midend/programTransformation
pending src/midend/programTransformation/astInlining
pending src/midend/programTransformation/astOutlining
pending src/midend/programTransformation/astOutlining/lib_test
pending src/midend/programTransformation/constantFolding
pending src/midend/programTransformation/extractFunctionArgumentsNormalization
pending src/midend/programTransformation/finiteDifferencing
pending src/midend/programTransformation/functionCallNormalization
pending src/midend/programTransformation/implicitCodeGeneration
pending src/midend/programTransformation/loopProcessing
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pending src/midend/programTransformation/loopProcessing/depGraph
pending src/midend/programTransformation/loopProcessing/depInfo
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pending src/midend/programTransformation/loopProcessing/outsideInterface
pending src/midend/programTransformation/loopProcessing/prepostTransformation
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pending src/midend/programTransformation/ompLowering
pending src/midend/programTransformation/partialRedundancyElimination
pending src/midend/programTransformation/singleStatementToBlockNormalization
pending src/midend/programTransformation/transformationTracking
pending src/util
pending src/util/StringUtility
pending src/util/commandlineProcessing
pending src/util/graphs
skip src/util/Sawyer
pending src/util/support
pending tests
pending tests/nonsmoke
pending tests/nonsmoke/ExamplesForTestWriters
pending tests/nonsmoke/acceptance
pending tests/nonsmoke/functional
in-progress tests/nonsmoke/functional/CompileTests
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pending tests/nonsmoke/functional/CompileTests/C11_tests
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pending tests/nonsmoke/functional/CompileTests/OpenClTests
pending tests/nonsmoke/functional/CompileTests/OpenMP_tests
pending tests/nonsmoke/functional/CompileTests/OpenMP_tests/cvalidation
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pending tests/nonsmoke/specimens/fortran
pending tests/nonsmoke/unit
pending tests/nonsmoke/unit/SageInterface
pending tests/nonsmoke/unit/SageInterface/referenceOutput
pending tests/nonsmoke/unit/SageInterface/tests
pending tests/smoke
pending tests/smoke/ExamplesForTestWriters
pending tests/smoke/acceptance
pending tests/smoke/functional
pending tests/smoke/functional/Fortran
pending tests/smoke/specimens
pending tests/smoke/specimens/c++
pending tests/smoke/specimens/c
pending tests/smoke/specimens/fortran
pending tests/smoke/unit
pending tests/smoke/unit/Utility
pending tools
pending tools/checkFortranInterfaces
pending tools/checkFortranInterfaces/tests
pending tools/classMemberVariablesInLambdas
pending tools/featureVector
pending tools/globalVariablesInLambdas
pending tutorial
pending tutorial/outliner
pending tutorial/spawn-frontend

Local/generated directories (not tracked, skip)

  • skip build/
  • skip CMakeFiles/
  • skip lib/

Drop list (upstream-only paths not in REX)

Any upstream directory not present in the keep list is dropped by default. The explicit list below names known upstream-only subtrees. Note: tests/nonsmoke/functional/RunTests, tests/nonsmoke/functional/testSupport, tests/nonsmoke/functional/roseTests/ROSETTA, and tests/nonsmoke/functional/roseTests/astInterfaceTests/unitTests are kept (see inventory).

Top-level upstream-only directories: - install-staging/ - projects/ - python/ - solaris-includes/ - utilities/ - winspecific/

Core source subtrees dropped in REX: - src/3rdPartyLibraries/ - src/3rdPartyLibraries/MSTL/ - src/3rdPartyLibraries/POET/ - src/3rdPartyLibraries/experimental-cplusplus-parser/ - src/3rdPartyLibraries/experimental-jovial-parser/ - src/3rdPartyLibraries/java-parser/ - src/3rdPartyLibraries/json/ - src/3rdPartyLibraries/qrose/ - src/integration/ - src/frontend/BinaryFormats/ - src/frontend/Disassemblers/ - src/frontend/ECJ_ROSE_Connection/ - src/frontend/Experimental_Ada_ROSE_Connection/ - src/frontend/Experimental_Csharp_ROSE_Connection/ - src/frontend/Experimental_Jovial_ROSE_Connection/ - src/frontend/Experimental_Matlab_ROSE_Connection/ - src/frontend/PHPFrontend/ - src/frontend/PythonFrontend/ - src/frontend/X10_ROSE_Connection/ - src/frontend/CxxFrontend/EDG/ - src/frontend/SageIII/astFileIO/ - src/frontend/SageIII/astFromString/ - src/frontend/SageIII/astVisualization/ - src/midend/BinaryAnalysis/ - src/midend/abstractHandle/ - src/midend/abstractMemoryObject/ - src/midend/astMatching/ - src/midend/astRewriteMechanism/ - src/midend/astSnippet/ - src/midend/programAnalysis/annotationLanguageParser/ - src/backend/asmUnparser/ - src/backend/unparser/AdaCodeGeneration/ - src/backend/unparser/JavaCodeGeneration/ - src/backend/unparser/JovialCodeGeneration/ - src/backend/unparser/MatlabCodeGeneration/ - src/backend/unparser/PHPCodeGeneration/ - src/backend/unparser/PythonCodeGeneration/ - src/backend/unparser/X10CodeGeneration/ - src/util/Sawyer/ - src/util/stringSupport/ - src/Rose/AST/ - src/Rose/BinaryAnalysis/ - src/Rose/CodeGen/ - src/Rose/Color/ - src/Rose/CommandLine/ - src/Rose/Diagnostics/ - src/Rose/FileSystem/ - src/Rose/Traits/ - src/roseSupport/

Explicit file drops (never reintroduce): - src/Rose/BitFlags.h - src/Rose/GraphUtility.h - src/Rose/Diagnostics.h - tests/nonsmoke/functional/Utility/bitFlags.C - tests/nonsmoke/functional/Utility/progressReports.C - tests/nonsmoke/functional/Utility/graphIO.C - tests/nonsmoke/functional/Utility/graphPerformance.C - tests/nonsmoke/functional/Utility/hash.C

Docs/scripts/tools/tutorial/tests dropped from upstream: - docs/IDE-Hints/ - scripts/nmiBuildAndTestFarm/ - scripts/spack/ - scripts/tup/ - tutorial/TAU_INCLUDE_DIR/ - tutorial/binaryAnalysis/ - tutorial/blockingTutorial/ - tutorial/intelPin/ - tutorial/roseHPCT/ - tools/BinaryAnalysis/ - tools/CodeThorn/ - tools/PortabilityTesting/ - tools/tests/ - tests/CompileTests/ - tests/roseTests/

Dropped languages/platforms (any upstream paths related to these are dropped by default): - PHP, JavaScript, Python, Java, UPC, Ada, Jovial, Matlab, X10, C#, YAML/mini-yaml. - Non-Linux platform-specific code or tests.

Automated per-commit sync workflow

1) Start from origin/main with a clean working tree. Ensure rose points at https://github.com/llnl/rose.git, disable its push URL, then fetch rose/weekly. 2) Use the repo-local skill and helper scripts: 

python3 .codex/skills/rose-upstream-sync/scripts/list_pending.py
python3 .codex/skills/rose-upstream-sync/scripts/classify_commit.py <upstream-sha>
3) Walk pending upstream commits in chronological order from the latest recorded upstream SHA in the newest non-empty sync CSV. 4) For each upstream commit: - inspect with git show <commit>; - decide drop, pick, pick-partial, drop-superseded, or already-present; - apply only retained REX scope; - run guard_dropped_paths.py --staged before committing; - validate the touched subsystem; - commit with Upstream-ROSE, Sync-Decision, and Sync-Log trailers; - update the current sync CSV immediately, including the REX commit SHA. 5) For version-only upstream commits: - record intermediate release bumps as drop-superseded; - after the useful sync range is otherwise complete, apply the latest upstream version marker to ROSE_VERSION and config/SCM_DATE; - run verify_version.py; - never restore configure.ac or src/frontend/CxxFrontend/EDG_VERSION. 6) When the sync range is complete, run the required validations: 
python3 .codex/skills/rose-upstream-sync/scripts/verify_coverage.py --csv docs/upstream-sync/rose-2026-commits.csv
cmake --build build -j32
ctest --test-dir build --output-on-failure -j32
7) The sync is not complete until verify_coverage.py proves every upstream commit in the range has a CSV row, every picked upstream SHA maps to a REX commit, and full CTest passes without regressions.