Revert r158337 "Move PPC host-CPU detection logic from PPCSubtarget into sys::getHostCPUName()."

This commit broke most of the PowerPC unit tests when running on
Intel/Apple.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158345 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 133 insertions, 132 deletions

diff --git a/lib/Support/Host.cpp b/lib/Support/Host.cpp
index f1073ab..1ad7852 100644
--- a/lib/Support/Host.cpp
+++ b/lib/Support/Host.cpp
@@ -11,12 +11,7 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "llvm/ADT/StringRef.h"
-#include "llvm/ADT/StringSwitch.h"
-#include "llvm/Support/DataStream.h"
-#include "llvm/Support/Debug.h"
 #include "llvm/Support/Host.h"
-#include "llvm/Support/raw_ostream.h"
 #include "llvm/Config/config.h"
 #include <string.h>
 
@@ -30,12 +25,6 @@
 #ifdef _MSC_VER
 #include <intrin.h>
 #endif
-#ifdef __APPLE__
-#include <mach/mach.h>
-#include <mach/mach_host.h>
-#include <mach/host_info.h>
-#include <mach/machine.h>
-#endif
 
 //===----------------------------------------------------------------------===//
 //
@@ -331,125 +320,6 @@ std::string sys::getHostCPUName() {
   }
   return "generic";
 }
-#elif defined(__APPLE__)
-std::string sys::getHostCPUName() {
-  host_basic_info_data_t hostInfo;
-  mach_msg_type_number_t infoCount;
-
-  infoCount = HOST_BASIC_INFO_COUNT;
-  host_info(mach_host_self(), HOST_BASIC_INFO, (host_info_t)&hostInfo, 
-            &infoCount);
-            
-  if (hostInfo.cpu_type != CPU_TYPE_POWERPC) return "generic";
-
-  switch(hostInfo.cpu_subtype) {
-  case CPU_SUBTYPE_POWERPC_601:   return "601";
-  case CPU_SUBTYPE_POWERPC_602:   return "602";
-  case CPU_SUBTYPE_POWERPC_603:   return "603";
-  case CPU_SUBTYPE_POWERPC_603e:  return "603e";
-  case CPU_SUBTYPE_POWERPC_603ev: return "603ev";
-  case CPU_SUBTYPE_POWERPC_604:   return "604";
-  case CPU_SUBTYPE_POWERPC_604e:  return "604e";
-  case CPU_SUBTYPE_POWERPC_620:   return "620";
-  case CPU_SUBTYPE_POWERPC_750:   return "750";
-  case CPU_SUBTYPE_POWERPC_7400:  return "7400";
-  case CPU_SUBTYPE_POWERPC_7450:  return "7450";
-  case CPU_SUBTYPE_POWERPC_970:   return "970";
-  default: ;
-  }
-  
-  return "generic";
-}
-#elif defined(__linux__) && (defined(__ppc__) || defined(__powerpc__))
-std::string sys::getHostCPUName() {
-  // Access to the Processor Version Register (PVR) on PowerPC is privileged,
-  // and so we must use an operating-system interface to determine the current
-  // processor type. On Linux, this is exposed through the /proc/cpuinfo file.
-  const char *generic = "generic";
-
-  // Note: We cannot mmap /proc/cpuinfo here and then process the resulting
-  // memory buffer because the 'file' has 0 size (it can be read from only
-  // as a stream).
-
-  std::string Err;
-  DataStreamer *DS = getDataFileStreamer("/proc/cpuinfo", &Err);
-  if (!DS) {
-    DEBUG(dbgs() << "Unable to open /proc/cpuinfo: " << Err << "\n");
-    return generic;
-  }
-
-  // The cpu line is second (after the 'processor: 0' line), so if this
-  // buffer is too small then something has changed (or is wrong).
-  char buffer[1024];
-  size_t CPUInfoSize = DS->GetBytes((unsigned char*) buffer, sizeof(buffer));
-  delete DS;
-
-  const char *CPUInfoStart = buffer;
-  const char *CPUInfoEnd = buffer + CPUInfoSize;
-
-  const char *CIP = CPUInfoStart;
-
-  const char *CPUStart = 0;
-  size_t CPULen = 0;
-
-  // We need to find the first line which starts with cpu, spaces, and a colon.
-  // After the colon, there may be some additional spaces and then the cpu type.
-  while (CIP < CPUInfoEnd && CPUStart == 0) {
-    if (CIP < CPUInfoEnd && *CIP == '\n')
-      ++CIP;
-
-    if (CIP < CPUInfoEnd && *CIP == 'c') {
-      ++CIP;
-      if (CIP < CPUInfoEnd && *CIP == 'p') {
-        ++CIP;
-        if (CIP < CPUInfoEnd && *CIP == 'u') {
-          ++CIP;
-          while (CIP < CPUInfoEnd && (*CIP == ' ' || *CIP == '\t'))
-            ++CIP;
-  
-          if (CIP < CPUInfoEnd && *CIP == ':') {
-            ++CIP;
-            while (CIP < CPUInfoEnd && (*CIP == ' ' || *CIP == '\t'))
-              ++CIP;
-  
-            if (CIP < CPUInfoEnd) {
-              CPUStart = CIP;
-              while (CIP < CPUInfoEnd && (*CIP != ' ' && *CIP != '\t' &&
-                                          *CIP != ',' && *CIP != '\n'))
-                ++CIP;
-              CPULen = CIP - CPUStart;
-            }
-          }
-        }
-      }
-    }
-
-    if (CPUStart == 0)
-      while (CIP < CPUInfoEnd && *CIP != '\n')
-        ++CIP;
-  }
-
-  if (CPUStart == 0)
-    return generic;
-
-  return StringSwitch<const char *>(StringRef(CPUStart, CPULen))
-    .Case("604e", "604e")
-    .Case("604", "604")
-    .Case("7400", "7400")
-    .Case("7410", "7400")
-    .Case("7447", "7400")
-    .Case("7455", "7450")
-    .Case("G4", "g4")
-    .Case("POWER4", "g4")
-    .Case("PPC970FX", "970")
-    .Case("PPC970MP", "970")
-    .Case("G5", "g5")
-    .Case("POWER5", "g5")
-    .Case("A2", "a2")
-    .Case("POWER6", "pwr6")
-    .Case("POWER7", "pwr7")
-    .Default(generic);
-}
 #else
 std::string sys::getHostCPUName() {
   return "generic";
diff --git a/lib/Target/PowerPC/PPCSubtarget.cpp b/lib/Target/PowerPC/PPCSubtarget.cpp
index 947a74c..55bc3f9 100644
--- a/lib/Target/PowerPC/PPCSubtarget.cpp
+++ b/lib/Target/PowerPC/PPCSubtarget.cpp
@@ -14,9 +14,12 @@
 #include "PPCSubtarget.h"
 #include "PPCRegisterInfo.h"
 #include "PPC.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/ADT/StringSwitch.h"
 #include "llvm/GlobalValue.h"
 #include "llvm/Target/TargetMachine.h"
-#include "llvm/Support/Host.h"
+#include "llvm/Support/DataStream.h"
+#include "llvm/Support/Debug.h"
 #include "llvm/Support/TargetRegistry.h"
 #include <cstdlib>
 
@@ -26,6 +29,134 @@
 
 using namespace llvm;
 
+#if defined(__APPLE__)
+#include <mach/mach.h>
+#include <mach/mach_host.h>
+#include <mach/host_info.h>
+#include <mach/machine.h>
+
+/// GetCurrentPowerPCFeatures - Returns the current CPUs features.
+static const char *GetCurrentPowerPCCPU() {
+  host_basic_info_data_t hostInfo;
+  mach_msg_type_number_t infoCount;
+
+  infoCount = HOST_BASIC_INFO_COUNT;
+  host_info(mach_host_self(), HOST_BASIC_INFO, (host_info_t)&hostInfo, 
+            &infoCount);
+            
+  if (hostInfo.cpu_type != CPU_TYPE_POWERPC) return "generic";
+
+  switch(hostInfo.cpu_subtype) {
+  case CPU_SUBTYPE_POWERPC_601:   return "601";
+  case CPU_SUBTYPE_POWERPC_602:   return "602";
+  case CPU_SUBTYPE_POWERPC_603:   return "603";
+  case CPU_SUBTYPE_POWERPC_603e:  return "603e";
+  case CPU_SUBTYPE_POWERPC_603ev: return "603ev";
+  case CPU_SUBTYPE_POWERPC_604:   return "604";
+  case CPU_SUBTYPE_POWERPC_604e:  return "604e";
+  case CPU_SUBTYPE_POWERPC_620:   return "620";
+  case CPU_SUBTYPE_POWERPC_750:   return "750";
+  case CPU_SUBTYPE_POWERPC_7400:  return "7400";
+  case CPU_SUBTYPE_POWERPC_7450:  return "7450";
+  case CPU_SUBTYPE_POWERPC_970:   return "970";
+  default: ;
+  }
+  
+  return "generic";
+}
+#elif defined(__linux__) && (defined(__ppc__) || defined(__powerpc__))
+static const char *GetCurrentPowerPCCPU() {
+  // Access to the Processor Version Register (PVR) on PowerPC is privileged,
+  // and so we must use an operating-system interface to determine the current
+  // processor type. On Linux, this is exposed through the /proc/cpuinfo file.
+  const char *generic = "generic";
+
+  // Note: We cannot mmap /proc/cpuinfo here and then process the resulting
+  // memory buffer because the 'file' has 0 size (it can be read from only
+  // as a stream).
+
+  std::string Err;
+  DataStreamer *DS = getDataFileStreamer("/proc/cpuinfo", &Err);
+  if (!DS) {
+    DEBUG(dbgs() << "Unable to open /proc/cpuinfo: " << Err << "\n");
+    return generic;
+  }
+
+  // The cpu line is second (after the 'processor: 0' line), so if this
+  // buffer is too small then something has changed (or is wrong).
+  char buffer[1024];
+  size_t CPUInfoSize = DS->GetBytes((unsigned char*) buffer, sizeof(buffer));
+  delete DS;
+
+  const char *CPUInfoStart = buffer;
+  const char *CPUInfoEnd = buffer + CPUInfoSize;
+
+  const char *CIP = CPUInfoStart;
+
+  const char *CPUStart = 0;
+  size_t CPULen = 0;
+
+  // We need to find the first line which starts with cpu, spaces, and a colon.
+  // After the colon, there may be some additional spaces and then the cpu type.
+  while (CIP < CPUInfoEnd && CPUStart == 0) {
+    if (CIP < CPUInfoEnd && *CIP == '\n')
+      ++CIP;
+
+    if (CIP < CPUInfoEnd && *CIP == 'c') {
+      ++CIP;
+      if (CIP < CPUInfoEnd && *CIP == 'p') {
+        ++CIP;
+        if (CIP < CPUInfoEnd && *CIP == 'u') {
+          ++CIP;
+          while (CIP < CPUInfoEnd && (*CIP == ' ' || *CIP == '\t'))
+            ++CIP;
+  
+          if (CIP < CPUInfoEnd && *CIP == ':') {
+            ++CIP;
+            while (CIP < CPUInfoEnd && (*CIP == ' ' || *CIP == '\t'))
+              ++CIP;
+  
+            if (CIP < CPUInfoEnd) {
+              CPUStart = CIP;
+              while (CIP < CPUInfoEnd && (*CIP != ' ' && *CIP != '\t' &&
+                                          *CIP != ',' && *CIP != '\n'))
+                ++CIP;
+              CPULen = CIP - CPUStart;
+            }
+          }
+        }
+      }
+    }
+
+    if (CPUStart == 0)
+      while (CIP < CPUInfoEnd && *CIP != '\n')
+        ++CIP;
+  }
+
+  if (CPUStart == 0)
+    return generic;
+
+  return StringSwitch<const char *>(StringRef(CPUStart, CPULen))
+    .Case("604e", "604e")
+    .Case("604", "604")
+    .Case("7400", "7400")
+    .Case("7410", "7400")
+    .Case("7447", "7400")
+    .Case("7455", "7450")
+    .Case("G4", "g4")
+    .Case("POWER4", "g4")
+    .Case("PPC970FX", "970")
+    .Case("PPC970MP", "970")
+    .Case("G5", "g5")
+    .Case("POWER5", "g5")
+    .Case("A2", "a2")
+    .Case("POWER6", "pwr6")
+    .Case("POWER7", "pwr7")
+    .Default(generic);
+}
+#endif
+
+
 PPCSubtarget::PPCSubtarget(const std::string &TT, const std::string &CPU,
                            const std::string &FS, bool is64Bit)
   : PPCGenSubtargetInfo(TT, CPU, FS)
@@ -50,7 +181,7 @@ PPCSubtarget::PPCSubtarget(const std::string &TT, const std::string &CPU,
 #if defined(__APPLE__) || \
       (defined(__linux__) && (defined(__ppc__) || defined(__powerpc__)))
   if (CPUName == "generic")
-    CPUName = sys::getHostCPUName();
+    CPUName = GetCurrentPowerPCCPU();
 #endif
 
   // Parse features string.