From 37a4621fb6ffc121ec78936a8243219ff53be760 Mon Sep 17 00:00:00 2001
From: Simon Pilgrim <llvm-dev@redking.me.uk>
Date: Fri, 16 Apr 2021 17:26:32 +0100
Subject: [PATCH] [DAG] SelectionDAG::isSplatValue - early out if binop is not
 splat. NFCI.

Just return false if we fail to match splats - the remainder of the code is for (fixed)vector operations - shuffles/insertions etc.
---
 llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index 71964b3de2b0..d24455572273 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -2472,7 +2472,7 @@ bool SelectionDAG::isSplatValue(SDValue V, const APInt &DemandedElts,
     return true;
   case ISD::ADD:
   case ISD::SUB:
-  case ISD::AND: 
+  case ISD::AND:
   case ISD::XOR:
   case ISD::OR: {
     APInt UndefLHS, UndefRHS;
@@ -2483,7 +2483,7 @@ bool SelectionDAG::isSplatValue(SDValue V, const APInt &DemandedElts,
       UndefElts = UndefLHS | UndefRHS;
       return true;
     }
-    break;
+    return false;
   }
   case ISD::ABS:
   case ISD::TRUNCATE: