[commit: ghc] wip/T12105's head updated: Merge MatchFixity and HsMatchContext (306ecad)

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Repository : ssh://git@git.haskell.org/ghc

Branch 'wip/T12105' now includes:

     4f5b335 Suppress the warning about __sync_fetch_and_nand (#9678)
     03d8960 Don't split the arg types in a PatSyn signature
     eb8eb02 Spelling in comment
     839b424 Remove unused Type.splitFunTysN
     9c3e55b Comments only
     35053eb Testsuite: delete check_files_written
     1bf5c12 Spelling
     8f7d016 Add support for unicode TH quotes (#11743)
     4c6e69d Document some benign nondeterminism
     9d06ef1 Make Arrow desugaring deterministic
     95dfdce Remove 'deriving Typeable' statements
     fe8a4e5 Runtime linker: Break m32 allocator out into its own file
     1956cbf Fix: #12084 deprecate old profiling flags
     31f1804 Testsuite: delete drvfail015.stderr-7.0 [skip ci]
     1319363 Always use native-Haskell de/encoders for ASCII and latin1
     ac38c02 Update submodule vector [skip ci]
     961ed26 Fix broken links to mdo papers
     eec88ee RTS: simplify read_heap_profiling_flag
     bdc5558 Testsuite: introduce TEST_HC_OPTS_INTERACTIVE (#11468)
     8408d84 Spelling in comments
     6a5bce1 Testsuite: also normalise platform-dependent .stdout/stderr
     f07bf19 Testsuite: fix enum01/02/03 on Windows (#9399)
     5020bc8 Testsuite: add a test for #5522 (-fliberate-case -fspec-constr)
     0f1e315 Fix bytecode gen to deal with rep-polymorphism
     e9e61f1 Reduce special-casing for nullary unboxed tuple
     5b8bec2 StgCmmExpr: Fix a duplication
     5b145c9 Coverage.hs: Fix a duplication
     cd50d23 StgCmmCon: Do not generate moves from unused fields to local variables
     b43a793 More fixes for unboxed tuples
     72fd407 Comments and white space only
     59250dc StgCmmExpr: Remove a redundant list
     3a00ff9 Do not init record accessors as exported
     3f20da1 Typos in comments
     d0dd572 Clarify users' guide section on GeneralizedNewtypeDeriving
     d40682e Testsuite: don't use --interactive in Makefiles
     1e67010 RtsFlags.c: Const correct fixes
     7e4f3dc StgCmmUtils.emitMultiAssign: Make assertion msg more helpful
     0ffa23d Remove unused FAST_STRING_NOT_NEEDED macro defs
     930e74f Update a Cmm note
     0676e68 Fix detection and use of `USE_LIBDW`
     cb2c042 Use nameSetAny in findUses
     f2b3be0 Improve failed knot-tying error message.
     99ace83 Kill nameSetElems in getInfo
     36d254a Testsuite: run tests in /tmp/ghctest-xxx instead of /tmp/ghctest/xxx
     940229c Travis: llvm's apt repository is offline
     cb9f635 Localize orphan-related nondeterminism
     d348acd Serialize vParallelTyCons in a stable order
     3eac3a0 Add nameSetElemsStable and fix the build
     dad39ff Remove dead generics-related code from OccName
     d753ea2 Use UniqDSet for finding free names in the Linker
     e2446c0 Kill nameSetElems in findImportUsage
     be47085 Kill nameSetElems in rnCmdTop
     060c176 Whitespace only
     1d1987e HscMain: Minor simplification
     9cc6fac Make FieldLabelEnv a deterministic set
     2046297 Document putSymbolTable determinism
     4842a80 Derive instances in Data.Data
     1dadd9a testsuite: Mark broken tests on powerpc64le
     3747372 Refactored SymbolInfo to lower memory usage in RTS
     079c1b8 Use useful names for Symbol Addr and Names in Linker.c
     02f893e integer-gmp: Make minusInteger more efficient
     4aa299d PrelInfo: Ensure that tuple promoted datacon names are in knownKeyNames
     eda73a3 RTS SMP: Use compiler built-ins on all platforms.
     4dbacbc Rename isPinnedByteArray# to isByteArrayPinned#
     b948a1d Refactor the SymbolName and SymbolAddr types to be pointers
     5965117 Replace hand-written Bounded instances with derived ones
     0d963ca Add relocation type R_X86_64_REX_GOTPCRELX
     4848ab9 Testsuite: fixup comments for T9872d [skip ci]
     886f4c1 Better comment for orIfNotFound.
     f91d87d Failing test-case for #12135.
     3042a9d Use UniqDFM for HomePackageTable
     48e9a1f Implement deterministic CallInfoSet
     a90085b Add @since annotations to base instances
     e684f54 Desugar ApplicativeDo and RecDo deterministically
     31ba8d6 Kill nameSetElems
     46d2da0 Document putDictionary determinism
     3e7a876 Kill foldUniqSet
     1937ef1 Make UnitIdMap a deterministic map
     306ecad Merge MatchFixity and HsMatchContext