ARM: Add a postRA pass to legalize stack offsets. Greedy approach (reserve IP).

src/IceClFlags.h

 //===- subzero/src/IceClFlags.h - Cl Flags for translation ------*- C++ -*-===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
@@ skipping 121 matching lines @@
     RandomNopProbabilityAsPercentage = NewValue;
   }
 
   TargetArch getTargetArch() const { return TArch; }
   void setTargetArch(TargetArch NewValue) { TArch = NewValue; }
 
   TargetInstructionSet getTargetInstructionSet() const { return TInstrSet; }
   void setTargetInstructionSet(TargetInstructionSet NewValue) {
     TInstrSet = NewValue;
   }
+  uint32_t getTestStackExtra() const {
+    return BuildDefs::minimal() ? 0 : TestStackExtra;
+  }
+  void setTestStackExtra(uint32_t NewValue) {
+    if (BuildDefs::minimal())
+      return;
+    TestStackExtra = NewValue;
+  }
 
   VerboseMask getVerbose() const {
     return BuildDefs::dump() ? VMask : (VerboseMask)IceV_None;
   }
   void setVerbose(VerboseMask NewValue) { VMask = NewValue; }
 
   void
   setRandomizeAndPoolImmediatesOption(RandomizeAndPoolImmediatesEnum Option) {
     RandomizeAndPoolImmediatesOption = Option;
   }
@@ skipping 94 matching lines @@
   bool UseSandboxing;
 
   OptLevel Opt;
   FileType OutFileType;
   RandomizeAndPoolImmediatesEnum RandomizeAndPoolImmediatesOption;
   uint32_t RandomizeAndPoolImmediatesThreshold;
   int RandomMaxNopsPerInstruction;
   int RandomNopProbabilityAsPercentage;
   uint32_t ReorderFunctionsWindowSize;
   TargetArch TArch;
+  uint32_t TestStackExtra;
   TargetInstructionSet TInstrSet;
   VerboseMask VMask;
 
   IceString DefaultFunctionPrefix;
   IceString DefaultGlobalPrefix;
   IceString TestPrefix;
   IceString TimingFocusOn;
   IceString TranslateOnly;
   IceString VerboseFocusOn;
 
   size_t NumTranslationThreads; // 0 means completely sequential
   uint64_t RandomSeed;
 };
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICECLFLAGS_H