From 7d7f10bcdd4eeade10d64fee424260318f624127 Mon Sep 17 00:00:00 2001
From: Aditya Nandakumar <aditya_nandakumar@apple.com>
Date: Thu, 4 May 2017 22:00:42 +0000
Subject: [PATCH] [GISel]:Skip legalizing Intermediate inst(with generic types)

During legalization, targets can create Pseudo Instructions with
generic types. We shouldn't try to legalize them.

Reviewed by Quentin, dsanders
https://reviews.llvm.org/D32575

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@302199 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/GlobalISel/Legalizer.cpp | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/lib/CodeGen/GlobalISel/Legalizer.cpp b/lib/CodeGen/GlobalISel/Legalizer.cpp
index 74ed58e8d04..aec379197df 100644
--- a/lib/CodeGen/GlobalISel/Legalizer.cpp
+++ b/lib/CodeGen/GlobalISel/Legalizer.cpp
@@ -176,8 +176,13 @@ bool Legalizer::runOnMachineFunction(MachineFunction &MF) {
       unsigned NumNewInsns = 0;
       SmallVector<MachineInstr *, 4> WorkList;
       Helper.MIRBuilder.recordInsertions([&](MachineInstr *MI) {
-        ++NumNewInsns;
-        WorkList.push_back(MI);
+        // Only legalize pre-isel generic instructions.
+        // Legalization process could generate Target specific pseudo
+        // instructions with generic types. Don't record them
+        if (isPreISelGenericOpcode(MI->getOpcode())) {
+          ++NumNewInsns;
+          WorkList.push_back(MI);
+        }
       });
       WorkList.push_back(&*MI);
 
-- 
2.11.0