From 128459b85b59530e511ea17b3cc3a5b8ee3e8bd4 Mon Sep 17 00:00:00 2001 From: Devang Patel <dpatel@apple.com> Date: Mon, 24 Sep 2007 20:02:42 +0000 Subject: Do not promote null values because it may be unsafe to do so. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42270 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Transforms/Scalar/LICM.cpp | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'lib/Transforms/Scalar/LICM.cpp') diff --git a/lib/Transforms/Scalar/LICM.cpp b/lib/Transforms/Scalar/LICM.cpp index 3058f74..f112ba8 100644 --- a/lib/Transforms/Scalar/LICM.cpp +++ b/lib/Transforms/Scalar/LICM.cpp @@ -800,6 +800,10 @@ void LICM::FindPromotableValuesInLoop( break; } + // Do not promote null values because it may be unsafe to do so. + if (isa<ConstantPointerNull>(V)) + PointerOk = false; + if (GetElementPtrInst *GEP = dyn_cast<GetElementPtrInst>(V)) { // If GEP base is NULL then the calculated address used by Store or // Load instruction is invalid. Do not promote this value because -- cgit v1.1