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;
- LibraryInfo = 0;
- Inliner = 0;
+ LibraryInfo = nullptr;
+ Inliner = nullptr;
DisableTailCalls = false;
DisableUnitAtATime = false;
DisableUnrollLoops = false;
SLPVectorize = RunSLPVectorization;
LoopVectorize = RunLoopVectorization;
RerollLoops = RunLoopRerolling;
+ LoadCombine = RunLoadCombine;
}
PassManagerBuilder::~PassManagerBuilder() {
if (OptLevel == 0) {
if (Inliner) {
MPM.add(Inliner);
- Inliner = 0;
+ Inliner = nullptr;
}
// FIXME: This is a HACK! The inliner pass above implicitly creates a CGSCC
if (!DisableUnitAtATime) {
addExtensionsToPM(EP_ModuleOptimizerEarly, MPM);
+ MPM.add(createIPSCCPPass()); // IP SCCP
MPM.add(createGlobalOptimizerPass()); // Optimize out global vars
- MPM.add(createIPSCCPPass()); // IP SCCP
MPM.add(createDeadArgEliminationPass()); // Dead argument elimination
MPM.add(createInstructionCombiningPass());// Clean up after IPCP & DAE
+ addExtensionsToPM(EP_Peephole, MPM);
MPM.add(createCFGSimplificationPass()); // Clean up after IPCP & DAE
}
MPM.add(createPruneEHPass()); // Remove dead EH info
if (Inliner) {
MPM.add(Inliner);
- Inliner = 0;
+ Inliner = nullptr;
}
if (!DisableUnitAtATime)
MPM.add(createFunctionAttrsPass()); // Set readonly/readnone attrs
MPM.add(createCorrelatedValuePropagationPass()); // Propagate conditionals
MPM.add(createCFGSimplificationPass()); // Merge & remove BBs
MPM.add(createInstructionCombiningPass()); // Combine silly seq's
+ addExtensionsToPM(EP_Peephole, MPM);
if (!DisableTailCalls)
MPM.add(createTailCallEliminationPass()); // Eliminate tail calls
// Run instcombine after redundancy elimination to exploit opportunities
// opened up by them.
MPM.add(createInstructionCombiningPass());
+ addExtensionsToPM(EP_Peephole, MPM);
MPM.add(createJumpThreadingPass()); // Thread jumps
MPM.add(createCorrelatedValuePropagationPass());
MPM.add(createDeadStoreEliminationPass()); // Delete dead stores
if (BBVectorize) {
MPM.add(createBBVectorizePass());
MPM.add(createInstructionCombiningPass());
+ addExtensionsToPM(EP_Peephole, MPM);
if (OptLevel > 1 && UseGVNAfterVectorization)
MPM.add(createGVNPass()); // Remove redundancies
else
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.
+ addExtensionsToPM(EP_Peephole, MPM);
// FIXME: This is a HACK! The inliner pass above implicitly creates a CGSCC
// pass manager that we are specifically trying to avoid. To prevent this
// as function calls, so that we can only pass them when the vectorizer
// changed the code.
MPM.add(createInstructionCombiningPass());
+ addExtensionsToPM(EP_Peephole, MPM);
MPM.add(createCFGSimplificationPass());
if (!DisableUnrollLoops)
// function pointers. When this happens, we often have to resolve varargs
// calls, etc, so let instcombine do this.
PM.add(createInstructionCombiningPass());
+ addExtensionsToPM(EP_Peephole, PM);
// Inline small functions
if (RunInliner)
// The IPO passes may leave cruft around. Clean up after them.
PM.add(createInstructionCombiningPass());
+ addExtensionsToPM(EP_Peephole, PM);
PM.add(createJumpThreadingPass());
// Break up allocas
PM.add(createLoopDeletionPass());
PM.add(createLoopVectorizePass(true, true));
+ // 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);
PM.add(createJumpThreadingPass());