[SEH] Remove the old __C_specific_handler code now that WinEHPrepare works

This removes the -sehprepare flag and makes __C_specific_handler
functions always to use WinEHPrepare.

This was tested by building all of chromium_builder_tests and running a
few tests that use SEH, but if something breaks, we can revert this.

llvm-svn: 235557

1 files changed, 0 insertions, 15 deletions

diff --git a/llvm/lib/CodeGen/WinEHPrepare.cpp b/llvm/lib/CodeGen/WinEHPrepare.cpp
index b368f3b1754..67f7cdc8faf 100644
--- a/llvm/lib/CodeGen/WinEHPrepare.cpp
+++ b/llvm/lib/CodeGen/WinEHPrepare.cpp
@@ -323,11 +323,6 @@ FunctionPass *llvm::createWinEHPass(const TargetMachine *TM) {
   return new WinEHPrepare(TM);
 }
 
-// FIXME: Remove this once the backend can handle the prepared IR.
-static cl::opt<bool>
-    SEHPrepare("sehprepare", cl::Hidden,
-               cl::desc("Prepare functions with SEH personalities"));
-
 bool WinEHPrepare::runOnFunction(Function &Fn) {
   // No need to prepare outlined handlers.
   if (Fn.hasFnAttribute("wineh-parent"))
@@ -355,16 +350,6 @@ bool WinEHPrepare::runOnFunction(Function &Fn) {
 
   DT = &getAnalysis<DominatorTreeWrapperPass>().getDomTree();
 
-  if (isAsynchronousEHPersonality(Personality) && !SEHPrepare) {
-    // Replace all resume instructions with unreachable.
-    // FIXME: Remove this once the backend can handle the prepared IR.
-    for (ResumeInst *Resume : Resumes) {
-      IRBuilder<>(Resume).CreateUnreachable();
-      Resume->eraseFromParent();
-    }
-    return true;
-  }
-
   // If there were any landing pads, prepareExceptionHandlers will make changes.
   prepareExceptionHandlers(Fn, LPads);
   return true;