From b1bff76e22bd39eb46dcae49891fda1cf1cc0bd5 Mon Sep 17 00:00:00 2001
From: Vitaly Buka <vitalybuka@google.com>
Date: Fri, 12 Jul 2019 22:37:55 +0000
Subject: isBytewiseValue checks ConstantVector element by element

Summary: Vector of the same value with few undefs will sill be considered "Bytewise"

Reviewers: eugenis, pcc, jfb

Reviewed By: jfb

Subscribers: dexonsmith, hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D64031

llvm-svn: 365971
---
 llvm/lib/Analysis/ValueTracking.cpp | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

(limited to 'llvm/lib/Analysis/ValueTracking.cpp')

diff --git a/llvm/lib/Analysis/ValueTracking.cpp b/llvm/lib/Analysis/ValueTracking.cpp
index cf8fa9cee3f..ad8034b2d7b 100644
--- a/llvm/lib/Analysis/ValueTracking.cpp
+++ b/llvm/lib/Analysis/ValueTracking.cpp
@@ -3253,12 +3253,7 @@ Value *llvm::isBytewiseValue(Value *V, const DataLayout &DL) {
     return Val;
   }
 
-  if (isa<ConstantVector>(C)) {
-    Constant *Splat = cast<ConstantVector>(C)->getSplatValue();
-    return Splat ? isBytewiseValue(Splat, DL) : nullptr;
-  }
-
-  if (isa<ConstantArray>(C) || isa<ConstantStruct>(C)) {
+  if (isa<ConstantAggregate>(C)) {
     Value *Val = UndefInt8;
     for (unsigned I = 0, E = C->getNumOperands(); I != E; ++I)
       if (!(Val = Merge(Val, isBytewiseValue(C->getOperand(I), DL))))
-- 
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