From ec176e30d655f96d75b49e620a849008bf0f63a2 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Tue, 30 Aug 2005 16:56:19 +0000
Subject: [PATCH] Fix a miscompile of PtrDist/bc.  Sign extending bools is not
 the right thing, at least tends to expose problems elsewhere.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23149 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/SelectionDAG/LegalizeDAG.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
index 9480ed6f096..db3b33abc51 100644
--- a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
@@ -2011,7 +2011,10 @@ SDOperand SelectionDAGLegalize::PromoteOp(SDOperand Op) {
     Result = DAG.getNode(ISD::UNDEF, NVT);
     break;
   case ISD::Constant:
-    Result = DAG.getNode(ISD::SIGN_EXTEND, NVT, Op);
+    if (VT != MVT::i1)
+      Result = DAG.getNode(ISD::SIGN_EXTEND, NVT, Op);
+    else
+      Result = DAG.getNode(ISD::ZERO_EXTEND, NVT, Op);
     assert(isa<ConstantSDNode>(Result) && "Didn't constant fold zext?");
     break;
   case ISD::ConstantFP: