RunLoopRerolling("reroll-loops", cl::Hidden,
cl::desc("Run the loop rerolling pass"));
+static cl::opt<bool> RunLoadCombine("combine-loads", cl::init(false),
+ cl::Hidden,
+ cl::desc("Run the load combining pass"));
+
PassManagerBuilder::PassManagerBuilder() {
OptLevel = 2;
SizeLevel = 0;
SLPVectorize = RunSLPVectorization;
LoopVectorize = RunLoopVectorization;
RerollLoops = RunLoopRerolling;
+ LoadCombine = RunLoadCombine;
}
PassManagerBuilder::~PassManagerBuilder() {
MPM.add(createLoopUnrollPass());
}
+ if (LoadCombine)
+ MPM.add(createLoadCombinePass());
+
MPM.add(createAggressiveDCEPass()); // Delete dead instructions
MPM.add(createCFGSimplificationPass()); // Merge & remove BBs
MPM.add(createInstructionCombiningPass()); // Clean up after everything.
// More scalar chains could be vectorized due to more alias information
PM.add(createSLPVectorizerPass()); // Vectorize parallel scalar chains.
+ if (LoadCombine)
+ PM.add(createLoadCombinePass());
+
// Cleanup and simplify the code after the scalar optimizations.
PM.add(createInstructionCombiningPass());
addExtensionsToPM(EP_Peephole, PM);