Remove HostInfo::useDriverDriver(). This was only used in two places

inside the innards of the Driver implementation, and only ever
implemented to return 'true' for the Darwin OSes. Instead use a more
direct query on the target triple and a comment to document why the
target matters here.

If anyone is worried about this predicate getting wider use or improper
use, I can make it a local or private predicate in the driver.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@148797 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 0 insertions, 66 deletions

diff --git a/lib/Driver/HostInfo.cpp b/lib/Driver/HostInfo.cpp
index 0e7879278a..4010311823 100644
--- a/lib/Driver/HostInfo.cpp
+++ b/lib/Driver/HostInfo.cpp
@@ -45,8 +45,6 @@ public:
   DarwinHostInfo(const Driver &D, const llvm::Triple &Triple);
   ~DarwinHostInfo();
 
-  virtual bool useDriverDriver() const;
-
   virtual ToolChain *CreateToolChain(const ArgList &Args,
                                      const char *ArchName) const;
 };
@@ -61,10 +59,6 @@ DarwinHostInfo::~DarwinHostInfo() {
     delete it->second;
 }
 
-bool DarwinHostInfo::useDriverDriver() const {
-  return true;
-}
-
 ToolChain *DarwinHostInfo::CreateToolChain(const ArgList &Args,
                                            const char *ArchName) const {
   llvm::Triple::ArchType Arch;
@@ -132,8 +126,6 @@ public:
   TCEHostInfo(const Driver &D, const llvm::Triple &Triple);
   ~TCEHostInfo() {}
 
-  virtual bool useDriverDriver() const;
-
   virtual ToolChain *CreateToolChain(const ArgList &Args, 
                                      const char *ArchName) const;
 };
@@ -142,10 +134,6 @@ TCEHostInfo::TCEHostInfo(const Driver &D, const llvm::Triple& Triple)
   : HostInfo(D, Triple) {
 }
 
-bool TCEHostInfo::useDriverDriver() const { 
-  return false;
-}
-
 ToolChain *TCEHostInfo::CreateToolChain(const ArgList &Args, 
                                         const char *ArchName) const {
   llvm::Triple TCTriple(getTriple());
@@ -165,8 +153,6 @@ public:
   UnknownHostInfo(const Driver &D, const llvm::Triple& Triple);
   ~UnknownHostInfo();
 
-  virtual bool useDriverDriver() const;
-
   virtual ToolChain *CreateToolChain(const ArgList &Args,
                                      const char *ArchName) const;
 };
@@ -181,10 +167,6 @@ UnknownHostInfo::~UnknownHostInfo() {
     delete it->second;
 }
 
-bool UnknownHostInfo::useDriverDriver() const {
-  return false;
-}
-
 ToolChain *UnknownHostInfo::CreateToolChain(const ArgList &Args,
                                             const char *ArchName) const {
   assert(!ArchName &&
@@ -228,8 +210,6 @@ public:
     : HostInfo(D, Triple) {}
   ~OpenBSDHostInfo();
 
-  virtual bool useDriverDriver() const;
-
   virtual ToolChain *CreateToolChain(const ArgList &Args,
                                      const char *ArchName) const;
 };
@@ -240,10 +220,6 @@ OpenBSDHostInfo::~OpenBSDHostInfo() {
     delete it->second;
 }
 
-bool OpenBSDHostInfo::useDriverDriver() const {
-  return false;
-}
-
 ToolChain *OpenBSDHostInfo::CreateToolChain(const ArgList &Args,
                                             const char *ArchName) const {
   assert(!ArchName &&
@@ -275,8 +251,6 @@ public:
     : HostInfo(D, Triple) {}
   ~AuroraUXHostInfo();
 
-  virtual bool useDriverDriver() const;
-
   virtual ToolChain *CreateToolChain(const ArgList &Args,
                                      const char *ArchName) const;
 };
@@ -287,10 +261,6 @@ AuroraUXHostInfo::~AuroraUXHostInfo() {
     delete it->second;
 }
 
-bool AuroraUXHostInfo::useDriverDriver() const {
-  return false;
-}
-
 ToolChain *AuroraUXHostInfo::CreateToolChain(const ArgList &Args,
                                              const char *ArchName) const {
   assert(!ArchName &&
@@ -320,8 +290,6 @@ public:
     : HostInfo(D, Triple) {}
   ~FreeBSDHostInfo();
 
-  virtual bool useDriverDriver() const;
-
   virtual ToolChain *CreateToolChain(const ArgList &Args,
                                      const char *ArchName) const;
 };
@@ -332,10 +300,6 @@ FreeBSDHostInfo::~FreeBSDHostInfo() {
     delete it->second;
 }
 
-bool FreeBSDHostInfo::useDriverDriver() const {
-  return false;
-}
-
 ToolChain *FreeBSDHostInfo::CreateToolChain(const ArgList &Args,
                                             const char *ArchName) const {
   assert(!ArchName &&
@@ -379,8 +343,6 @@ public:
     : HostInfo(D, Triple) {}
   ~NetBSDHostInfo();
 
-  virtual bool useDriverDriver() const;
-
   virtual ToolChain *CreateToolChain(const ArgList &Args,
                                      const char *ArchName) const;
 };
@@ -391,10 +353,6 @@ NetBSDHostInfo::~NetBSDHostInfo() {
     delete it->second;
 }
 
-bool NetBSDHostInfo::useDriverDriver() const {
-  return false;
-}
-
 ToolChain *NetBSDHostInfo::CreateToolChain(const ArgList &Args,
                                             const char *ArchName) const {
   assert(!ArchName &&
@@ -443,8 +401,6 @@ public:
     : HostInfo(D, Triple) {}
   ~MinixHostInfo();
 
-  virtual bool useDriverDriver() const;
-
   virtual ToolChain *CreateToolChain(const ArgList &Args,
                                      const char *ArchName) const;
 };
@@ -456,10 +412,6 @@ MinixHostInfo::~MinixHostInfo() {
   }
 }
 
-bool MinixHostInfo::useDriverDriver() const {
-  return false;
-}
-
 ToolChain *MinixHostInfo::CreateToolChain(const ArgList &Args,
                                             const char *ArchName) const {
   assert(!ArchName &&
@@ -491,8 +443,6 @@ public:
     : HostInfo(D, Triple) {}
   ~DragonFlyHostInfo();
 
-  virtual bool useDriverDriver() const;
-
   virtual ToolChain *CreateToolChain(const ArgList &Args,
                                      const char *ArchName) const;
 };
@@ -503,10 +453,6 @@ DragonFlyHostInfo::~DragonFlyHostInfo() {
     delete it->second;
 }
 
-bool DragonFlyHostInfo::useDriverDriver() const {
-  return false;
-}
-
 ToolChain *DragonFlyHostInfo::CreateToolChain(const ArgList &Args,
                                               const char *ArchName) const {
   assert(!ArchName &&
@@ -536,8 +482,6 @@ public:
     : HostInfo(D, Triple) {}
   ~LinuxHostInfo();
 
-  virtual bool useDriverDriver() const;
-
   virtual ToolChain *CreateToolChain(const ArgList &Args,
                                      const char *ArchName) const;
 };
@@ -548,10 +492,6 @@ LinuxHostInfo::~LinuxHostInfo() {
     delete it->second;
 }
 
-bool LinuxHostInfo::useDriverDriver() const {
-  return false;
-}
-
 ToolChain *LinuxHostInfo::CreateToolChain(const ArgList &Args,
                                           const char *ArchName) const {
 
@@ -601,8 +541,6 @@ public:
   WindowsHostInfo(const Driver &D, const llvm::Triple& Triple);
   ~WindowsHostInfo();
 
-  virtual bool useDriverDriver() const;
-
   virtual types::ID lookupTypeForExtension(const char *Ext) const {
     return types::lookupTypeForExtension(Ext);
   }
@@ -621,10 +559,6 @@ WindowsHostInfo::~WindowsHostInfo() {
     delete it->second;
 }
 
-bool WindowsHostInfo::useDriverDriver() const {
-  return false;
-}
-
 ToolChain *WindowsHostInfo::CreateToolChain(const ArgList &Args,
                                             const char *ArchName) const {
   assert(!ArchName &&