From: Craig Topper <craig.topper@gmail.com>
Date: Wed, 1 Feb 2012 06:51:58 +0000 (+0000)
Subject: Don't create VBROADCAST nodes if any nodes use the chain result from the load. Fixes... 
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=a1902a18cd289d9554f5649324c5ad27109586bb;p=oota-llvm.git

Don't create VBROADCAST nodes if any nodes use the chain result from the load. Fixes PR11900.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149478 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index 90cd3d3b747..2ce883a1700 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -4997,6 +4997,10 @@ static SDValue isVectorBroadcast(SDValue &Op, const X86Subtarget *Subtarget) {
   if (!ISD::isNormalLoad(Ld.getNode()))
     return SDValue();
 
+  // Reject loads that have uses of the chain result
+  if (Ld->hasAnyUseOfValue(1))
+    return SDValue();
+
   bool Is256 = VT.getSizeInBits() == 256;
   bool Is128 = VT.getSizeInBits() == 128;
   unsigned ScalarSize = Ld.getValueType().getSizeInBits();