From 90842427b2f6ab5c0aab6049fd9177033101847f Mon Sep 17 00:00:00 2001 From: Manman Ren Date: Mon, 18 Mar 2013 21:23:25 +0000 Subject: Check whether a pointer is non-null (isKnownNonNull) in isKnownNonZero. This handles the case where we have an inbounds GEP with alloca as the pointer. This fixes the regression in PR12750 and rdar://13286434. Note that we can also fix this by handling some GEP cases in isKnownNonNull. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177321 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Analysis/ValueTracking.cpp | 2 ++ 1 file changed, 2 insertions(+) (limited to 'lib/Analysis') diff --git a/lib/Analysis/ValueTracking.cpp b/lib/Analysis/ValueTracking.cpp index 45b75df..45dcc5e 100644 --- a/lib/Analysis/ValueTracking.cpp +++ b/lib/Analysis/ValueTracking.cpp @@ -953,6 +953,8 @@ bool llvm::isKnownNonZero(Value *V, const DataLayout *TD, unsigned Depth) { // Check for pointer simplifications. if (V->getType()->isPointerTy()) { + if (isKnownNonNull(V)) + return true; if (GEPOperator *GEP = dyn_cast(V)) if (isGEPKnownNonNull(GEP, TD, Depth)) return true; -- cgit v1.1