From: Simon Pilgrim <llvm-dev@redking.me.uk>
Date: Wed, 13 Jan 2021 17:14:07 +0000 (+0000)
Subject: [DAG] visitVECTOR_SHUFFLE - use all_of to check for all-undef shuffle mask. NFCI.
X-Git-Tag: llvmorg-13-init~1276
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=993c488ed2b347011d9d71990af38a82aaf5bdf5;p=platform%2Fupstream%2Fllvm.git

[DAG] visitVECTOR_SHUFFLE - use all_of to check for all-undef shuffle mask. NFCI.
---

diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index 5d9bb4e4..7e4ee3b 100644
--- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -20901,11 +20901,7 @@ SDValue DAGCombiner::visitVECTOR_SHUFFLE(SDNode *N) {
     }
 
     // Check if all indices in Mask are Undef. In case, propagate Undef.
-    bool isUndefMask = true;
-    for (unsigned i = 0; i != NumElts && isUndefMask; ++i)
-      isUndefMask &= Mask[i] < 0;
-
-    if (isUndefMask)
+    if (llvm::all_of(Mask, [](int M) { return M < 0; }))
       return DAG.getUNDEF(VT);
 
     if (!SV0.getNode())