mir-canon: First commit.

mir-canon (MIRCanonicalizerPass) is a pass designed to reorder instructions and rename operands so that two similar programs will diff more cleanly after being run through mir-canon than they would otherwise. This project is still a work in progress and there are ideas still being discussed for improving diff quality. M include/llvm/InitializePasses.h M lib/CodeGen/CMakeLists.txt M lib/CodeGen/CodeGen.cpp A lib/CodeGen/MIRCanonicalizerPass.cpp llvm-svn: 317285
llvm · Nov 2, 2017 · a521c4a · a521c4a
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diff --git a/llvm/include/llvm/InitializePasses.h b/llvm/include/llvm/InitializePasses.h
@@ -377,6 +377,7 @@ void initializeWinEHPreparePass(PassRegistry&);
 void initializeWriteBitcodePassPass(PassRegistry&);
 void initializeWriteThinLTOBitcodePass(PassRegistry&);
 void initializeXRayInstrumentationPass(PassRegistry&);
+void initializeMIRCanonicalizerPass(PassRegistry &);
 
 } // end namespace llvm
 

diff --git a/llvm/lib/CodeGen/CMakeLists.txt b/llvm/lib/CodeGen/CMakeLists.txt
@@ -113,6 +113,7 @@ add_llvm_library(LLVMCodeGen
   RegisterPressure.cpp
   RegisterScavenging.cpp
   RenameIndependentSubregs.cpp
+  MIRCanonicalizerPass.cpp
   RegisterUsageInfo.cpp
   RegUsageInfoCollector.cpp
   RegUsageInfoPropagate.cpp

diff --git a/llvm/lib/CodeGen/CodeGen.cpp b/llvm/lib/CodeGen/CodeGen.cpp
@@ -99,6 +99,7 @@ void llvm::initializeCodeGen(PassRegistry &Registry) {
   initializeVirtRegRewriterPass(Registry);
   initializeWinEHPreparePass(Registry);
   initializeXRayInstrumentationPass(Registry);
+  initializeMIRCanonicalizerPass(Registry);
 }
 
 void LLVMInitializeCodeGen(LLVMPassRegistryRef R) {