[commit: ghc] wip/T7994-calledArity's head updated: Add huge note to CallArity (f9cacd3)

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

Branch 'wip/T7994-calledArity' now includes:

     5281dd6 User documentation for pattern synonyms
     9005f91 Squash some spelling issues
     d9ac5ea Tweak the example
     7325040 Mention #3202 (no monomorphism restriction in GHCi) in release notes
     8f8bd88 Fix the Win64 RTS linker & disable .ctors
     2ac9e5b build.mk.sample: Don't disable dynamic linking for LLVM flavours
     08f8efb Add short blurb about LLVM dynamic linking to release notes
     4ade962 Abort when binutils ld is used with dynamic linking on ARM
     874124d Fix ./validate failure due to unused result.
     db9baf0 Update some mingw32 perf numbers.
     f9652e2 Check for __thread in ./configure.ac
     28b031c Refactor GCTDecl.h, and mitigate #7602 a bit
     943f22a Document a Haddock/Mavericks bug.
     f7be53a Fix inplace dynamic linking on OS X (#8266)
     25821cc Win64 linker: fix loading foreign imports (#2283)
     9ed12c7 Remove a TODO FIXME in the release notes.
     466d069 Bump version: 7.7 -> 7.9
     34a5b81 arityAnalProgram first try
     5bfbf0c Second try, this time only collect tail calls
     6ff1795 Set the new IdInfo CalledArity
     0a3dacc Some very prelimary explanations
     f77b9a4 Do not be too strict about things being tail-calls
     7e0160e Use same trick for calls as for cases:
     0a551b0 Consider less lets as interesting
     aa970ca Add a unit test for CallArity
     3ac498e More CallArity to its own module
     3545510 Add the usual flags -fcall-arity and -dddump-call-arity
     49d28cc Do not say “TailCall” in function names
     849bd01 Stop fixpointing when below exprArity
     f9cacd3 Add huge note to CallArity