From 857efb0880dbfbb0f52f401f18f9c3717f6cc276 Mon Sep 17 00:00:00 2001
From: Richard Smith <richard-llvm@metafoo.co.uk>
Date: Mon, 7 Nov 2016 16:47:20 +0000
Subject: Add -O0 support for @llvm.invariant.group.barrier by discarding it if
 it gets to ISel.

Differential Revision: https://reviews.llvm.org/D26292

llvm-svn: 286119
---
 llvm/lib/CodeGen/SelectionDAG/FastISel.cpp | 1 +
 1 file changed, 1 insertion(+)

(limited to 'llvm/lib/CodeGen/SelectionDAG/FastISel.cpp')

diff --git a/llvm/lib/CodeGen/SelectionDAG/FastISel.cpp b/llvm/lib/CodeGen/SelectionDAG/FastISel.cpp
index 4ca22497703..452bb059494 100644
--- a/llvm/lib/CodeGen/SelectionDAG/FastISel.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/FastISel.cpp
@@ -1216,6 +1216,7 @@ bool FastISel::selectIntrinsicCall(const IntrinsicInst *II) {
     updateValueMap(II, ResultReg);
     return true;
   }
+  case Intrinsic::invariant_group_barrier:
   case Intrinsic::expect: {
     unsigned ResultReg = getRegForValue(II->getArgOperand(0));
     if (!ResultReg)
-- 
cgit v1.2.3