diff options
Diffstat (limited to 'llvm/lib/Transforms')
| -rw-r--r-- | llvm/lib/Transforms/IPO/PassManagerBuilder.cpp | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp b/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp index b8d1b7e78e3..6f709937f86 100644 --- a/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp +++ b/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp @@ -220,6 +220,8 @@ void PassManagerBuilder::populateModulePassManager( MPM.add(createIPSCCPPass()); // IP SCCP MPM.add(createGlobalOptimizerPass()); // Optimize out global vars + // Promote any localized global vars + MPM.add(createPromoteMemoryToRegisterPass()); MPM.add(createDeadArgEliminationPass()); // Dead argument elimination @@ -489,6 +491,8 @@ void PassManagerBuilder::addLTOOptimizationPasses(legacy::PassManagerBase &PM) { // Now that we internalized some globals, see if we can hack on them! PM.add(createFunctionAttrsPass()); // Add norecurse if possible. PM.add(createGlobalOptimizerPass()); + // Promote any localized global vars. + PM.add(createPromoteMemoryToRegisterPass()); // Linking modules together can lead to duplicated global constants, only // keep one copy of each constant. @@ -554,6 +558,15 @@ void PassManagerBuilder::addLTOOptimizationPasses(legacy::PassManagerBase &PM) { PM.add(createLoopVectorizePass(true, LoopVectorize)); + // Now that we've optimized loops (in particular loop induction variables), + // we may have exposed more scalar opportunities. Run parts of the scalar + // optimizer again at this point. + PM.add(createInstructionCombiningPass()); // Initial cleanup + PM.add(createCFGSimplificationPass()); // if-convert + PM.add(createSCCPPass()); // Propagate exposed constants + PM.add(createInstructionCombiningPass()); // Clean up again + PM.add(createBitTrackingDCEPass()); + // More scalar chains could be vectorized due to more alias information if (RunSLPAfterLoopVectorization) if (SLPVectorize) |
