Add constant blinding/pooling option for X8632 code translation

src/IceClFlags.cpp

 //===- subzero/src/IceClFlags.cpp - Command line flags and parsing --------===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // This file defines commandline flags parsing.
@@ skipping 88 matching lines @@
 cl::opt<bool>
     EnablePhiEdgeSplit("phi-edge-split",
                        cl::desc("Enable edge splitting for Phi lowering"),
                        cl::init(true));
 
 // TODO(stichnot): See if we can easily use LLVM's -rng-seed option
 // and implementation.  I expect the implementation is different and
 // therefore the tests would need to be changed.
 cl::opt<unsigned long long>
     RandomSeed("sz-seed", cl::desc("Seed the random number generator"),
-               cl::init(time(0)));
+               cl::init(1));
 
 cl::opt<bool> ShouldDoNopInsertion("nop-insertion",
                                    cl::desc("Randomly insert NOPs"),
                                    cl::init(false));
 
 cl::opt<bool>
     RandomizeRegisterAllocation("randomize-regalloc",
                                 cl::desc("Randomize register allocation"),
                                 cl::init(false));
 
@@ skipping 131 matching lines @@
 cl::opt<bool> LLVMVerboseErrors(
     "verbose-llvm-parse-errors",
     cl::desc("Print out more descriptive PNaCl bitcode parse errors when "
              "building LLVM IR first"),
     cl::init(false));
 cl::opt<std::string> OutputFilename("o", cl::desc("Override output filename"),
                                     cl::init("-"), cl::value_desc("filename"));
 
 Ice::IceString AppName;
 
+// Define the command line options for immediates pooling and randomization
+cl::opt<Ice::RandomizeAndPoolImmediatesEnum> RandomizeAndPoolImmediatesOption(
+    "randomize-pool-immediates",
+    cl::desc("Randomize or pooling the representation of immediates"),
+    cl::init(Ice::RPI_None),
+    cl::values(clEnumValN(Ice::RPI_None, "none",
+                          "Do not randomize or pooling immediates (default)"),
+               clEnumValN(Ice::RPI_Randomize, "randomize",
+                          "Turn on immediate constants blinding"),
+               clEnumValN(Ice::RPI_Pool, "pool",
+                          "Turn on immediate constants pooling"),
+               clEnumValEnd));
+// Command line option for x86 immediate integer randomization/pooling
+// threshold. Immediates whose representation are between:
+// -RandomizeAndPoolImmediatesThreshold/2 and
+// +RandomizeAndPoolImmediatesThreshold/2 will be randomized or pooled.
+cl::opt<uint32_t> RandomizeAndPoolImmediatesThreshold(
+    "randomize-pool-threshold",
+    cl::desc("The threshold for immediates randomization and pooling"),
+    cl::init(0xffff));
+
 } // end of anonymous namespace
 
 namespace Ice {
 
 void ClFlags::parseFlags(int argc, char **argv) {
   cl::ParseCommandLineOptions(argc, argv);
   AppName = IceString(argv[0]);
 }
 
 void ClFlags::resetClFlags(ClFlags &OutFlags) {
@@ skipping 72 matching lines @@
   OutFlags.setTestPrefix(::TestPrefix);
   OutFlags.setTimeEachFunction(::TimeEachFunction);
   OutFlags.setTimingFocusOn(::TimingFocusOn);
   OutFlags.setTranslateOnly(::TranslateOnly);
   OutFlags.setUseSandboxing(::UseSandboxing);
   OutFlags.setVerboseFocusOn(::VerboseFocusOn);
   OutFlags.setOutFileType(::OutFileType);
   OutFlags.setMaxNopsPerInstruction(::MaxNopsPerInstruction);
   OutFlags.setNopProbabilityAsPercentage(::NopProbabilityAsPercentage);
   OutFlags.setVerbose(VMask);
+
+  // set for immediates randomization or pooling option
+  OutFlags.setRandomizeAndPoolImmediatesOption(
+      ::RandomizeAndPoolImmediatesOption);
+  OutFlags.setRandomizeAndPoolImmediatesThreshold(
+      ::RandomizeAndPoolImmediatesThreshold);
 }
 
 void ClFlags::getParsedClFlagsExtra(ClFlagsExtra &OutFlagsExtra) {
   OutFlagsExtra.setAlwaysExitSuccess(AlwaysExitSuccess);
   OutFlagsExtra.setBuildOnRead(BuildOnRead);
   OutFlagsExtra.setGenerateBuildAtts(GenerateBuildAtts);
   OutFlagsExtra.setLLVMVerboseErrors(LLVMVerboseErrors);
   OutFlagsExtra.setAppName(AppName);
   OutFlagsExtra.setInputFileFormat(InputFileFormat);
   OutFlagsExtra.setIRFilename(IRFilename);
   OutFlagsExtra.setLogFilename(LogFilename);
   OutFlagsExtra.setOutputFilename(OutputFilename);
 }
 
 } // end of namespace Ice