From 20893b3611b3a5d8cdd99a42b0ba6d77e974bd1c Mon Sep 17 00:00:00 2001
From: Matt Arsenault <Matthew.Arsenault@amd.com>
Date: Wed, 15 Oct 2014 23:37:49 +0000
Subject: [PATCH] R600: Remove unnecessary part of
 computeKnownBitsForTargetNode

Zero-width BFEs are combined away already, so there's no point in
handling them.

llvm-svn: 219868
---
 llvm/lib/Target/R600/AMDGPUISelLowering.cpp | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/llvm/lib/Target/R600/AMDGPUISelLowering.cpp b/llvm/lib/Target/R600/AMDGPUISelLowering.cpp
index b7df3d8341da..ab771f5ee5b7 100644
--- a/llvm/lib/Target/R600/AMDGPUISelLowering.cpp
+++ b/llvm/lib/Target/R600/AMDGPUISelLowering.cpp
@@ -2388,11 +2388,6 @@ void AMDGPUTargetLowering::computeKnownBitsForTargetNode(
 
     unsigned BitWidth = 32;
     uint32_t Width = CWidth->getZExtValue() & 0x1f;
-    if (Width == 0) {
-      KnownZero = APInt::getAllOnesValue(BitWidth);
-      KnownOne = APInt::getNullValue(BitWidth);
-      return;
-    }
 
     // FIXME: This could do a lot more. If offset is 0, should be the same as
     // sign_extend_inreg implementation, but that involves duplicating it.