From 35458c2fe9e700d9d548617a3c2a53b814cc39c6 Mon Sep 17 00:00:00 2001
From: Nemanja Ivanovic <nemanja.i.ibm@gmail.com>
Date: Sat, 11 Apr 2015 10:43:36 +0000
Subject: [PATCH] Add Clang support for -mdirect-move on PPC

This patch corresponds to review:
http://reviews.llvm.org/D8930

This just adds a front end option to let the back end know the target has PPC
direct move instructions.

llvm-svn: 234683
---
 clang/include/clang/Driver/Options.td |  4 ++++
 clang/lib/Basic/Targets.cpp           | 13 ++++++++++++-
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/clang/include/clang/Driver/Options.td b/clang/include/clang/Driver/Options.td
index 50bfd315c5ae..0992e9e509fc 100644
--- a/clang/include/clang/Driver/Options.td
+++ b/clang/include/clang/Driver/Options.td
@@ -1269,6 +1269,10 @@ def mpower8_crypto : Flag<["-"], "mcrypto">,
     Group<m_ppc_Features_Group>;
 def mnopower8_crypto : Flag<["-"], "mno-crypto">,
     Group<m_ppc_Features_Group>;
+def mdirect_move : Flag<["-"], "mdirect-move">,
+    Group<m_ppc_Features_Group>;
+def mnodirect_move : Flag<["-"], "mno-direct-move">,
+    Group<m_ppc_Features_Group>;
 def mhtm : Flag<["-"], "mhtm">, Group<m_ppc_Features_Group>;
 def mno_htm : Flag<["-"], "mno-htm">, Group<m_ppc_Features_Group>;
 def mfprnd : Flag<["-"], "mfprnd">, Group<m_ppc_Features_Group>;
diff --git a/clang/lib/Basic/Targets.cpp b/clang/lib/Basic/Targets.cpp
index 082520583cce..9cd061aacff7 100644
--- a/clang/lib/Basic/Targets.cpp
+++ b/clang/lib/Basic/Targets.cpp
@@ -743,6 +743,7 @@ class PPCTargetInfo : public TargetInfo {
   bool HasVSX;
   bool HasP8Vector;
   bool HasP8Crypto;
+  bool HasDirectMove;
   bool HasQPX;
   bool HasHTM;
   bool HasBPERMD;
@@ -754,7 +755,7 @@ protected:
 public:
   PPCTargetInfo(const llvm::Triple &Triple)
     : TargetInfo(Triple), HasVSX(false), HasP8Vector(false),
-      HasP8Crypto(false), HasQPX(false), HasHTM(false),
+      HasP8Crypto(false), HasDirectMove(false), HasQPX(false), HasHTM(false),
       HasBPERMD(false), HasExtDiv(false) {
     BigEndian = (Triple.getArch() != llvm::Triple::ppc64le);
     LongDoubleWidth = LongDoubleAlign = 128;
@@ -1035,6 +1036,11 @@ bool PPCTargetInfo::handleTargetFeatures(std::vector<std::string> &Features,
       continue;
     }
 
+    if (Feature == "direct-move") {
+      HasDirectMove = true;
+      continue;
+    }
+
     if (Feature == "qpx") {
       HasQPX = true;
       continue;
@@ -1257,6 +1263,10 @@ void PPCTargetInfo::getDefaultFeatures(llvm::StringMap<bool> &Features) const {
     .Case("pwr8", true)
     .Case("pwr7", true)
     .Default(false);
+  Features["direct-move"] = llvm::StringSwitch<bool>(CPU)
+    .Case("ppc64le", true)
+    .Case("pwr8", true)
+    .Default(false);
 }
 
 bool PPCTargetInfo::hasFeature(StringRef Feature) const {
@@ -1265,6 +1275,7 @@ bool PPCTargetInfo::hasFeature(StringRef Feature) const {
     .Case("vsx", HasVSX)
     .Case("power8-vector", HasP8Vector)
     .Case("crypto", HasP8Crypto)
+    .Case("direct-move", HasDirectMove)
     .Case("qpx", HasQPX)
     .Case("htm", HasHTM)
     .Case("bpermd", HasBPERMD)