Add Subtarget support to PowerPC. Next up, using it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22644 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 54 insertions, 0 deletions

diff --git a/lib/Target/PowerPC/PPCSubtarget.cpp b/lib/Target/PowerPC/PPCSubtarget.cpp
new file mode 100644
index 0000000000..4fae1a2d1d
--- /dev/null
+++ b/lib/Target/PowerPC/PPCSubtarget.cpp
@@ -0,0 +1,54 @@
+//===- PowerPCSubtarget.cpp - PPC Subtarget Information ---------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by Nate Begeman and is distributed under the
+// University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the PPC specific subclass of TargetSubtarget.
+//
+//===----------------------------------------------------------------------===//
+
+#include "PowerPCSubtarget.h"
+#include "llvm/Module.h"
+
+#if defined(__APPLE__)
+#include <mach/mach.h>
+#include <mach/mach_host.h>
+#include <mach/host_info.h>
+#include <mach/machine.h>
+
+static boolean_t IsGP() {
+  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);
+  
+  return ((hostInfo.cpu_type == CPU_TYPE_POWERPC) &&
+          (hostInfo.cpu_subtype == CPU_SUBTYPE_POWERPC_970));
+} 
+#endif
+
+using namespace llvm;
+
+PPCSubtarget::PPCSubtarget(const Module &M)
+  : TargetSubtarget(), stackAlignment(16), isGigaProcessor(false), isAIX(false),
+    isDarwin(false) {
+  // Set the boolean corresponding to the current target triple, or the default
+  // if one cannot be determined, to true.
+  const std::string& TT = M.getTargetTriple();
+  if (TT.length() > 5) {
+    isDarwin = TT.find("darwin") != std::string::npos;
+  } else if (TT.empty()) {
+#if defined(_POWER)
+    isAIX = true;
+#elif defined(__APPLE__)
+    isDarwin = true;
+    isGigaProcessor = IsGP();
+#endif
+  }
+}