From 4f79f96fd7351a0bb731fcb508f76e6ab4ae2134 Mon Sep 17 00:00:00 2001
From: Kit Barton <kbarton@ca.ibm.com>
Date: Tue, 16 Jun 2015 16:01:15 +0000
Subject: Properly handle the mftb instruction.

The mftb instruction was incorrectly marked as deprecated in the PPC
Backend. Instead, it should not be treated as deprecated, but rather be
implemented using the mfspr instruction. A similar patch was put into GCC last
year. Details can be found at:

https://sourceware.org/ml/binutils/2014-11/msg00383.html.
This change will replace instances of the mftb instruction with the mfspr
instruction for all CPUs except 601 and pwr3. This will also be the default
behaviour.

Additional details can be found in:

https://llvm.org/bugs/show_bug.cgi?id=23680

Phabricator review: http://reviews.llvm.org/D10419

llvm-svn: 239827
---
 llvm/lib/Target/PowerPC/PPCSubtarget.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'llvm/lib/Target/PowerPC/PPCSubtarget.cpp')

diff --git a/llvm/lib/Target/PowerPC/PPCSubtarget.cpp b/llvm/lib/Target/PowerPC/PPCSubtarget.cpp
index a8ff4e1..cf603fe1 100644
--- a/llvm/lib/Target/PowerPC/PPCSubtarget.cpp
+++ b/llvm/lib/Target/PowerPC/PPCSubtarget.cpp
@@ -91,7 +91,7 @@ void PPCSubtarget::initializeEnvironment() {
   IsPPC4xx = false;
   IsPPC6xx = false;
   IsE500 = false;
-  DeprecatedMFTB = false;
+  FeatureMFTB = false;
   DeprecatedDST = false;
   HasLazyResolverStubs = false;
   HasICBT = false;
-- 
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