[llvm] 37a4621 - [DAG] SelectionDAG::isSplatValue - early out if binop is not splat. NFCI.

[Simon Pilgrim via llvm-commits]

Author: Simon Pilgrim
Date: 2021-04-16T18:26:33+01:00
New Revision: 37a4621fb6ffc121ec78936a8243219ff53be760

URL: https://github.com/llvm/llvm-project/commit/37a4621fb6ffc121ec78936a8243219ff53be760
DIFF: https://github.com/llvm/llvm-project/commit/37a4621fb6ffc121ec78936a8243219ff53be760.diff

LOG: [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.

Added: 
    

Modified: 
    llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp

Removed: 
    


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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: