According to ARM EABI, 8-bytes function arguments must be 8-bytes aligned.

[oota-llvm.git] / lib / Target / ARM / ARMTargetMachine.cpp

diff --git a/lib/Target/ARM/ARMTargetMachine.cpp b/lib/Target/ARM/ARMTargetMachine.cpp
index bd6664250cd516ee72bd00bf9d3c5885516504e7..442d25ecc2586d67bd551a2b8cb4d4ef700300eb 100644 (file)
--- a/lib/Target/ARM/ARMTargetMachine.cpp
+++ b/lib/Target/ARM/ARMTargetMachine.cpp
@@ -12,19 +12,19 @@
 //===----------------------------------------------------------------------===//
 
 #include "ARMTargetMachine.h"
+#include "ARMTargetAsmInfo.h"
 #include "ARMFrameInfo.h"
 #include "ARM.h"
-#include "llvm/Assembly/PrintModulePass.h"
 #include "llvm/Module.h"
 #include "llvm/PassManager.h"
-#include "llvm/CodeGen/MachineFunction.h"
-#include "llvm/CodeGen/Passes.h"
-#include "llvm/Target/TargetOptions.h"
+#include "llvm/Support/CommandLine.h"
 #include "llvm/Target/TargetMachineRegistry.h"
-#include "llvm/Transforms/Scalar.h"
-#include <iostream>
+#include "llvm/Target/TargetOptions.h"
 using namespace llvm;
 
+static cl::opt<bool> DisableLdStOpti("disable-arm-loadstore-opti", cl::Hidden,
+                              cl::desc("Disable load store optimization pass"));
+
 namespace {
   // Register the target.
   RegisterTarget<ARMTargetMachine> X("arm", "  ARM");
@@ -33,9 +33,16 @@ namespace {
 /// TargetMachine ctor - Create an ILP32 architecture model
 ///
 ARMTargetMachine::ARMTargetMachine(const Module &M, const std::string &FS)
-  : TargetMachine("ARM"), DataLayout("E-p:32:32"),
-    FrameInfo() {
-}
+  : Subtarget(M, FS),
+    DataLayout(Subtarget.isTargetDarwin() ?
+          (Subtarget.isThumb() ?
+           std::string("e-p:32:32-d:32:32-l:32:32-s:16:32-b:8:32-B:8:32-A:32") :
+           std::string("e-p:32:32-d:32:32-l:32:32")) :
+          (Subtarget.isThumb() ?
+           std::string("e-p:32:32-d:32:64-l:64:64-s:16:32-b:8:32-B:8:32-A:32") :
+           std::string("e-p:32:32-d:32:64-l:64:64"))),
+    InstrInfo(Subtarget),
+    FrameInfo(Subtarget) {}
 
 unsigned ARMTargetMachine::getModuleMatchQuality(const Module &M) {
   std::string TT = M.getTargetTriple();
@@ -48,54 +55,30 @@ unsigned ARMTargetMachine::getModuleMatchQuality(const Module &M) {
     return 0;
 }
 
-/// addPassesToEmitFile - Add passes to the specified pass manager
-/// to implement a static compiler for this target.
-///
-bool ARMTargetMachine::addPassesToEmitFile(PassManager &PM, std::ostream &Out,
-                                             CodeGenFileType FileType,
-                                             bool Fast) {
-  if (FileType != TargetMachine::AssemblyFile)
-    return true;
-
-  // Run loop strength reduction before anything else.
-  if (!Fast)
-    PM.add(createLoopStrengthReducePass());
-
-  if (!Fast)
-    PM.add(createCFGSimplificationPass());
-
-  // FIXME: Implement efficient support for garbage collection intrinsics.
-  PM.add(createLowerGCPass());
-
-  // FIXME: implement the invoke/unwind instructions!
-  PM.add(createLowerInvokePass());
 
-  // Print LLVM code input to instruction selector:
-  if (PrintMachineCode)
-    PM.add(new PrintFunctionPass());
+const TargetAsmInfo *ARMTargetMachine::createTargetAsmInfo() const {
+  return new ARMTargetAsmInfo(*this);
+}
 
-  // Make sure that no unreachable blocks are instruction selected.
-  PM.add(createUnreachableBlockEliminationPass());
 
+// Pass Pipeline Configuration
+bool ARMTargetMachine::addInstSelector(FunctionPassManager &PM, bool Fast) {
   PM.add(createARMISelDag(*this));
+  return false;
+}
 
-  // Print machine instructions as they were initially generated.
-  if (PrintMachineCode)
-    PM.add(createMachineFunctionPrinterPass(&std::cerr));
-
-  PM.add(createRegisterAllocator());
-  PM.add(createPrologEpilogCodeInserter());
-
-  // Print machine instructions after register allocation and prolog/epilog
-  // insertion.
-  if (PrintMachineCode)
-    PM.add(createMachineFunctionPrinterPass(&std::cerr));
+bool ARMTargetMachine::addPreEmitPass(FunctionPassManager &PM, bool Fast) {
+  // FIXME: temporarily disabling load / store optimization pass for Thumb mode.
+  if (!Fast && !DisableLdStOpti && !Subtarget.isThumb())
+    PM.add(createARMLoadStoreOptimizationPass());
+  
+  PM.add(createARMConstantIslandPass());
+  return true;
+}
 
+bool ARMTargetMachine::addAssemblyEmitter(FunctionPassManager &PM, bool Fast, 
+                                          std::ostream &Out) {
   // Output assembly language.
   PM.add(createARMCodePrinterPass(Out, *this));
-
-  // Delete the MachineInstrs we generated, since they're no longer needed.
-  PM.add(createMachineCodeDeleter());
   return false;
 }
-