From 9bca583f9d674eb27f492d46074f5621dd166f5a Mon Sep 17 00:00:00 2001
From: Dale Johannesen <dalej@apple.com>
Date: Fri, 23 May 2008 01:01:31 +0000
Subject: [PATCH] Allow for switch with no cases.  Was causing fault in
 gcc.dg/pr27531-1.c.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51464 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Transforms/Scalar/SCCP.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/Transforms/Scalar/SCCP.cpp b/lib/Transforms/Scalar/SCCP.cpp
index 9c17b77954e..79cda33f793 100644
--- a/lib/Transforms/Scalar/SCCP.cpp
+++ b/lib/Transforms/Scalar/SCCP.cpp
@@ -1379,6 +1379,8 @@ bool SCCPSolver::ResolvedUndefsIn(Function &F) {
       if (!getValueState(BI->getCondition()).isUndefined())
         continue;
     } else if (SwitchInst *SI = dyn_cast<SwitchInst>(TI)) {
+      if (SI->getNumSuccessors()<2)   // no cases
+        continue;
       if (!getValueState(SI->getCondition()).isUndefined())
         continue;
     } else {
-- 
2.34.1