1 files changed, 84 insertions, 0 deletions
diff --git a/lib/Target/ARM/ARMSubtarget.cpp b/lib/Target/ARM/ARMSubtarget.cpp
new file mode 100644
index 0000000..ef78cd5
--- /dev/null
+++ b/lib/Target/ARM/ARMSubtarget.cpp
@@ -0,0 +1,84 @@
+//===-- ARMSubtarget.cpp - ARM Subtarget Information ------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the ARM specific subclass of TargetSubtarget.
+//
+//===----------------------------------------------------------------------===//
+
+#include "ARMSubtarget.h"
+#include "ARMGenSubtarget.inc"
+#include "llvm/Module.h"
+using namespace llvm;
+
+ARMSubtarget::ARMSubtarget(const Module &M, const std::string &FS,
+                           bool isThumb)
+  : ARMArchVersion(V4T)
+  , ARMFPUType(None)
+  , IsThumb(isThumb)
+  , ThumbMode(Thumb1)
+  , UseThumbBacktraces(false)
+  , IsR9Reserved(false)
+  , stackAlignment(4)
+  , CPUString("generic")
+  , TargetType(isELF) // Default to ELF unless otherwise specified.
+  , TargetABI(ARM_ABI_APCS) {
+  // Determine default and user specified characteristics
+
+  // Parse features string.
+  CPUString = ParseSubtargetFeatures(FS, CPUString);
+
+  // 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();
+  unsigned Len = TT.length();
+  unsigned Idx = 0;
+
+  if (Len >= 5 && TT.substr(0, 4) == "armv")
+    Idx = 4;
+  else if (Len >= 6 && TT.substr(0, 6) == "thumb") {
+    IsThumb = true;
+    if (Len >= 7 && TT[5] == 'v')
+      Idx = 6;
+  }
+  if (Idx) {
+    unsigned SubVer = TT[Idx];
+    if (SubVer > '4' && SubVer <= '9') {
+      if (SubVer >= '7')
+        ARMArchVersion = V7A;
+      else if (SubVer == '6')
+        ARMArchVersion = V6;
+      else if (SubVer == '5') {
+        ARMArchVersion = V5T;
+        if (Len >= Idx+3 && TT[Idx+1] == 't' && TT[Idx+2] == 'e')
+          ARMArchVersion = V5TE;
+      }
+    }
+  }
+
+  if (Len >= 10) {
+    if (TT.find("-darwin") != std::string::npos)
+      // arm-darwin
+      TargetType = isDarwin;
+  } else if (TT.empty()) {
+#if defined(__APPLE__)
+    TargetType = isDarwin;
+#endif
+  }
+
+  if (TT.find("eabi") != std::string::npos)
+    TargetABI = ARM_ABI_AAPCS;
+
+  if (isAAPCS_ABI())
+    stackAlignment = 8;
+
+  if (isTargetDarwin()) {
+    UseThumbBacktraces = true;
+    IsR9Reserved = true;
+  }
+}