commit 39b7d65d8239fc48db900250f34a9aa8adb48638
author Alexey Samsonov <vonosmas@gmail.com> Wed Dec 02 21:25:28 2015 +0000
committer Alexey Samsonov <vonosmas@gmail.com> Wed Dec 02 21:25:28 2015 +0000
tree 4c45cb29c6d11670f41dde81a1e2d31cfe1649d6
parent bcfabaa05bc45d33e9ff60dca769150453956e83

[PowerPC] Remove wild call to RegScavenger::initRegState().

This call should in fact be made by RegScavenger::enterBasicBlock()
called below. The first call does nothing except for triggering UB,
indicated by UBSan (passing nullptr to memset()).

llvm-svn: 254548

llvm/lib/Target/PowerPC/PPCFrameLowering.cpp

diff --git a/llvm/lib/Target/PowerPC/PPCFrameLowering.cpp b/llvm/lib/Target/PowerPC/PPCFrameLowering.cpp
index 5a151eb..174deb8 100644
--- a/llvm/lib/Target/PowerPC/PPCFrameLowering.cpp
+++ b/llvm/lib/Target/PowerPC/PPCFrameLowering.cpp
@@ -569,8 +569,7 @@
   if ((UseAtEnd && MBB->isReturnBlock()) ||
       (!UseAtEnd && (&MBB->getParent()->front() == MBB)))
     return true;
-    
-  RS.initRegState();
+
   RS.enterBasicBlock(MBB);
 
   if (UseAtEnd && !MBB->empty()) {