X86AsmPrinter MCJIT MSVC bug fix.
Summary:
This bug was introduced in r213006 which makes an assumption that MCSection is COFF for Windows MSVC. This assumption is broken for MCJIT users where ELF is used instead [1]. The fix is to change the MCSection cast to a dyn_cast.
[1] http://lists.cs.uiuc.edu/pipermail/llvmdev/2013-December/068407.html.
Reviewers: majnemer
Reviewed By: majnemer
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D4872
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216173
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