From f6564c991b0bf67d3cdb0cd5b000ddbb0f6e56bd Mon Sep 17 00:00:00 2001
From: Craig Topper <craig.topper@gmail.com>
Date: Sat, 18 Feb 2017 22:53:38 +0000
Subject: [PATCH] [TableGen] Make sure EnforceSameSize populates the type sets
 if necessary.

This was found by another commit I'm working on.

llvm-svn: 295578
---
 llvm/utils/TableGen/CodeGenDAGPatterns.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/llvm/utils/TableGen/CodeGenDAGPatterns.cpp b/llvm/utils/TableGen/CodeGenDAGPatterns.cpp
index 4eec2e6aa3f0..22c3d490c5a4 100644
--- a/llvm/utils/TableGen/CodeGenDAGPatterns.cpp
+++ b/llvm/utils/TableGen/CodeGenDAGPatterns.cpp
@@ -644,6 +644,12 @@ bool EEVT::TypeSet::EnforceSameSize(EEVT::TypeSet &VTOperand,
 
   bool MadeChange = false;
 
+  if (isCompletelyUnknown())
+    MadeChange = FillWithPossibleTypes(TP);
+
+  if (VTOperand.isCompletelyUnknown())
+    MadeChange = VTOperand.FillWithPossibleTypes(TP);
+
   // If we know one of the types, it forces the other type agree.
   if (isConcrete()) {
     MVT IVT = getConcrete();