[ELF][ARM] Revert Redesign of .ARM.exidx handling to use a SyntheticSection

There is a reproducible buildbot failure (segfault) on the 2 stage
clang-cmake-armv8-lld bot. Reverting while I investigate.

Differential Revision: https://reviews.llvm.org/D59216

llvm-svn: 356684

1 files changed, 1 insertions, 3 deletions

diff --git a/lld/ELF/OutputSections.cpp b/lld/ELF/OutputSections.cpp
index 4cb5a3cdc59..a7f35ebfc57 100644
--- a/lld/ELF/OutputSections.cpp
+++ b/lld/ELF/OutputSections.cpp
@@ -289,9 +289,7 @@ void OutputSection::finalize() {
     // SHF_LINK_ORDER flag. The dependency is indicated by the sh_link field. We
     // need to translate the InputSection sh_link to the OutputSection sh_link,
     // all InputSections in the OutputSection have the same dependency.
-    if (auto *EX = dyn_cast<ARMExidxSyntheticSection>(First))
-      Link = EX->getLinkOrderDep()->getParent()->SectionIndex;
-    else if (auto *D = First->getLinkOrderDep())
+    if (auto *D = First->getLinkOrderDep())
       Link = D->getParent()->SectionIndex;
   }