Make ToolExecutionError inherit std::exception and implement its

[oota-llvm.git] / tools / llc / llc.cpp

diff --git a/tools/llc/llc.cpp b/tools/llc/llc.cpp
index 71667c34a3ccd2fe336c2ed2ac4b3794af0fc671..959bdbe36cbec178841434e50e51f5070177db30 100644 (file)
--- a/tools/llc/llc.cpp
+++ b/tools/llc/llc.cpp
@@ -1,4 +1,11 @@
 //===-- llc.cpp - Implement the LLVM Native Code Generator ----------------===//
+// 
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// 
+//===----------------------------------------------------------------------===//
 //
 // This is the llc code generator.
 //
@@ -16,6 +23,8 @@
 #include <memory>
 #include <fstream>
 
+using namespace llvm;
+
 // General options for llc.  Other pass-specific options are specified
 // within the corresponding llc passes, and target-specific options
 // and back-end code generation options are specified with the target machine.
@@ -28,21 +37,16 @@ OutputFilename("o", cl::desc("Output filename"), cl::value_desc("filename"));
 
 static cl::opt<bool> Force("f", cl::desc("Overwrite output files"));
 
-enum ArchName { noarch, x86, Sparc };
+enum ArchName { noarch, X86, Sparc, PowerPC, CBackend };
 
 static cl::opt<ArchName>
 Arch("march", cl::desc("Architecture to generate assembly for:"), cl::Prefix,
-     cl::values(clEnumVal(x86, "  IA-32 (Pentium and above)"),
-                clEnumValN(Sparc, "sparc", "  SPARC V9"),
+     cl::values(clEnumValN(X86,      "x86",     "  IA-32 (Pentium and above)"),
+                clEnumValN(Sparc,    "sparc",   "  SPARC V9"),
+                clEnumValN(PowerPC,  "powerpc", "  PowerPC"),
+                clEnumValN(CBackend, "c",       "  C backend"),
                0),
-#if defined(i386) || defined(__i386__) || defined(__x86__)
-     cl::init(x86)
-#elif defined(sparc) || defined(__sparc__) || defined(__sparcv9)
-     cl::init(Sparc)
-#else
-     cl::init(noarch)
-#endif
-     );
+     cl::init(noarch));
 
 // GetFileNameRoot - Helper function to get the basename of a filename...
 static inline std::string
@@ -51,7 +55,8 @@ GetFileNameRoot(const std::string &InputFilename)
   std::string IFN = InputFilename;
   std::string outputFilename;
   int Len = IFN.length();
-  if (IFN[Len-3] == '.' && IFN[Len-2] == 'b' && IFN[Len-1] == 'c') {
+  if ((Len > 2) &&
+      IFN[Len-3] == '.' && IFN[Len-2] == 'b' && IFN[Len-1] == 'c') {
     outputFilename = std::string(IFN.begin(), IFN.end()-3); // s/.bc/.s/
   } else {
     outputFilename = IFN;
@@ -75,31 +80,54 @@ int main(int argc, char **argv) {
 
   // Allocate target machine.  First, check whether the user has
   // explicitly specified an architecture to compile for.
-  unsigned Config = (mod.isLittleEndian()   ? TM::LittleEndian : TM::BigEndian)|
-                    (mod.has32BitPointers() ? TM::PtrSize32    : TM::PtrSize64);
-  TargetMachine* (*TargetMachineAllocator)(unsigned) = 0;
+  TargetMachine* (*TargetMachineAllocator)(const Module&,
+                                           IntrinsicLowering *) = 0;
   switch (Arch) {
-  case x86:
+  case CBackend:
+    TargetMachineAllocator = allocateCTargetMachine;
+    break;
+  case X86:
     TargetMachineAllocator = allocateX86TargetMachine;
     break;
   case Sparc:
     TargetMachineAllocator = allocateSparcTargetMachine;
     break;
+  case PowerPC:
+    TargetMachineAllocator = allocatePowerPCTargetMachine;
+    break;
   default:
     // Decide what the default target machine should be, by looking at
     // the module. This heuristic (ILP32, LE -> IA32; LP64, BE ->
     // SPARCV9) is kind of gross, but it will work until we have more
     // sophisticated target information to work from.
-    if (mod.isLittleEndian() && mod.has32BitPointers()) { 
+    if (mod.getEndianness()  == Module::LittleEndian &&
+        mod.getPointerSize() == Module::Pointer32) { 
       TargetMachineAllocator = allocateX86TargetMachine;
-    } else if (mod.isBigEndian() && mod.has64BitPointers()) {
+    } else if (mod.getEndianness() == Module::BigEndian &&
+        mod.getPointerSize() == Module::Pointer32) { 
+      TargetMachineAllocator = allocatePowerPCTargetMachine;
+    } else if (mod.getEndianness()  == Module::BigEndian &&
+               mod.getPointerSize() == Module::Pointer64) { 
       TargetMachineAllocator = allocateSparcTargetMachine;
     } else {
-      assert(0 && "You must specify -march; I could not guess the default");
+      // If the module is target independent, favor a target which matches the
+      // current build system.
+#if defined(i386) || defined(__i386__) || defined(__x86__)
+      TargetMachineAllocator = allocateX86TargetMachine;
+#elif defined(sparc) || defined(__sparc__) || defined(__sparcv9)
+      TargetMachineAllocator = allocateSparcTargetMachine;
+#elif defined(__POWERPC__) || defined(__ppc__) || defined(__APPLE__)
+      TargetMachineAllocator = allocatePowerPCTargetMachine;
+#else
+      std::cerr << argv[0] << ": module does not specify a target to use.  "
+                << "You must use the -march option.  If no native target is "
+                << "available, use -march=c to emit C code.\n";
+      return 1;
+#endif
     } 
     break;
   }
-  std::auto_ptr<TargetMachine> target((*TargetMachineAllocator)(Config));
+  std::auto_ptr<TargetMachine> target(TargetMachineAllocator(mod, 0));
   assert(target.get() && "Could not allocate target machine!");
   TargetMachine &Target = *target.get();
   const TargetData &TD = Target.getTargetData();
@@ -124,7 +152,7 @@ int main(int argc, char **argv) {
       }
       Out = new std::ofstream(OutputFilename.c_str());
 
-      // Make sure that the Out file gets unlink'd from the disk if we get a
+      // Make sure that the Out file gets unlinked from the disk if we get a
       // SIGINT
       RemoveFileOnSignal(OutputFilename);
     } else {
@@ -136,7 +164,11 @@ int main(int argc, char **argv) {
       Out = &std::cout;
     } else {
       OutputFilename = GetFileNameRoot(InputFilename); 
-      OutputFilename += ".s";
+
+      if (Arch != CBackend)
+        OutputFilename += ".s";
+      else
+        OutputFilename += ".cbe.c";
       
       if (!Force && std::ifstream(OutputFilename.c_str())) {
         // If force is not specified, make sure not to overwrite a file!
@@ -153,7 +185,7 @@ int main(int argc, char **argv) {
         return 1;
       }
       
-      // Make sure that the Out file gets unlink'd from the disk if we get a
+      // Make sure that the Out file gets unlinked from the disk if we get a
       // SIGINT
       RemoveFileOnSignal(OutputFilename);
     }