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Sergei Trofimovich authored
Summary: And fix things all the way down to it. Namely: - remove 'r30' from free registers, it's an .LCTOC1 register for gcc. generated .plt stubs expect it to be initialised. - fix PicBase computation, which originally forgot to use 'tmp' reg in 'initializePicBase_ppc.fetchPC' - mark 'ForeighTarget's as implicitly using 'PicBase' register (see comment for details) - add 64-bit MO_Sub and test on alloclimit3/4 regtests - fix dynamic label offsets to match with .LCTOC1 offset Signed-off-by: Sergei Trofimovich <siarheit@google.com> Test Plan: validate passes equal amount of vanilla/dyn tests Reviewers: simonmar, erikd, austin Reviewed By: erikd, austin Subscribers: carter, thomie Differential Revision: https://phabricator.haskell.org/D560 GHC Trac Issues: #8024, #9831
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