From 344a3780b2e33f6ca763666c380202b18aab72a3 Mon Sep 17 00:00:00 2001
From: Dimitry Andric <dim@FreeBSD.org>
Date: Thu, 29 Jul 2021 22:15:26 +0200
Subject: Vendor import of llvm-project main 88e66fa60ae5, the last commit
 before the upstream release/13.x branch was created.

---
 llvm/lib/Analysis/StackSafetyAnalysis.cpp | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'llvm/lib/Analysis/StackSafetyAnalysis.cpp')

diff --git a/llvm/lib/Analysis/StackSafetyAnalysis.cpp b/llvm/lib/Analysis/StackSafetyAnalysis.cpp
index 73096eb4baef..76f195fedf31 100644
--- a/llvm/lib/Analysis/StackSafetyAnalysis.cpp
+++ b/llvm/lib/Analysis/StackSafetyAnalysis.cpp
@@ -263,6 +263,8 @@ ConstantRange StackSafetyLocalAnalysis::offsetFrom(Value *Addr, Value *Base) {
   const SCEV *AddrExp = SE.getTruncateOrZeroExtend(SE.getSCEV(Addr), PtrTy);
   const SCEV *BaseExp = SE.getTruncateOrZeroExtend(SE.getSCEV(Base), PtrTy);
   const SCEV *Diff = SE.getMinusSCEV(AddrExp, BaseExp);
+  if (isa<SCEVCouldNotCompute>(Diff))
+    return UnknownRange;
 
   ConstantRange Offset = SE.getSignedRange(Diff);
   if (isUnsafe(Offset))
-- 
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