Reid Kleckner b32ff46ff7 Revert r338354 "[ARM] Revert r337821" ...

Disable ARMCodeGenPrepare by default again. It is causing verifier
failues in V8 that look like:

  Duplicate integer as switch case
  switch i32 %trunc, label %if.end13 [
    i32 0, label %cleanup36
    i32 0, label %if.then8
  ], !dbg !4981
  i32 0
  fatal error: error in backend: Broken function found, compilation aborted!

I will continue reducing the test case and send it along.

llvm-svn: 338452

2018-07-31 23:09:42 +00:00

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