[llvm-commits] [patch] Enable simplifycfg in bb with only a lifetime intrinsic

[Rafael Ávila de Espíndola]

I noticed that simplify cfg would fail to simplify bbs like

bb:
  call void @llvm.lifetime.end(i64 -1, i8* %a) nounwind
  br label %bb1

The attached patch enables that. It can cause a llvm.lifetime.* to be lost,
but if I understand the manual correctly, that is fine: the argument now
has a larger life range.

Cheers,
Rafael
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