tree edfb60cd90b4491f224785ed387fa1f2854158d7
parent 5270f4212b040b5f01372efb07996398d6f726fe
author Dan Gohman <dan433584@gmail.com> 1455777173 +0000
committer Dan Gohman <dan433584@gmail.com> 1455777173 +0000

[WebAssembly] Don't use setRequiresStructuredCFG(true).

While we still do want reducible control flow, the RequiresStructuredCFG
flag imposes more strict structure constraints than WebAssembly wants.
Unsetting this flag enables critical edge splitting and tail merging.

Also, disable TailDuplication explicitly, as it doesn't support virtual
registers, and was previously only disabled by the RequiresStructuredCFG
flag.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@261190 91177308-0d34-0410-b5e6-96231b3b80d8