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Summary:
The llvm-targets file records `mattr` values, and
while interrogating `clang` for the target, we might
stumble upon `+soft-float-abi`, however ghc does not support
full soft-float, and as such passing `+soft-float` to `llc`
will result in segfaults for any function passing float
registers F1, ... in the ARM Instruction Selection Pass.
Reviewers: bgamari, austin
Reviewed By: bgamari
Subscribers: rwbarton, thomie
Differential Revision: https://phabricator.haskell.org/D4030
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Summary:
This should help resolve the
compilcation that came up in Trac #14261
Test Plan: validate on various platforms
Reviewers: trofi, bgamari, austin, hvr
Reviewed By: trofi
Subscribers: rwbarton, thomie, erikd
GHC Trac Issues: #14261
Differential Revision: https://phabricator.haskell.org/D4004
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The LLVM backend shells out to LLVMs `opt` and `llc` tools. This clean
up introduces a shared data structure to carry the arguments we pass to
each tool so that corresponding flags are next to each other. It drops
the hard coded data layouts in favor of using `-mtriple` and have LLVM
infer them. Furthermore we add `clang` as a proper tool, so we don't
rely on assuming that `clang` is called `clang` on the `PATH` when using
`clang` as the assembler. Finally this diff also changes the type of
`optLevel` from `Int` to `Word`, as we do not have negative optimization
levels.
Reviewers: erikd, hvr, austin, rwbarton, bgamari, kavon
Reviewed By: kavon
Subscribers: michalt, Ericson2314, ryantrinkle, dfeuer, carter, simonpj,
kavon, simonmar, thomie, erikd, snowleopard
Differential Revision: https://phabricator.haskell.org/D3352
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