tree 22ab11ff282efe718c7f15d6e0efbc0d3b3d46fc
parent b7f95bd40a8baba25b17cfe7a7e231453ea399b3
author Kang Zhang <shkzhang@cn.ibm.com> 1566052625 +0000
committer Kang Zhang <shkzhang@cn.ibm.com> 1566052625 +0000

[CodeGen] Do the Simple Early Return in block-placement pass to optimize the blocks

Summary:

Fix a bug of preducessors.

In `block-placement` pass, it will create some patterns for unconditional we can do the simple early retrun.
But the `early-ret` pass is before `block-placement`, we don't want to run it again.
This patch is to do the simple early return to optimize the blocks at the last of `block-placement`.

Reviewed By: efriedma

Differential Revision: https://reviews.llvm.org/D63972


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@369191 91177308-0d34-0410-b5e6-96231b3b80d8