diff options
Diffstat (limited to 'llvm/lib/Transforms/IPO/PassManagerBuilder.cpp')
| -rw-r--r-- | llvm/lib/Transforms/IPO/PassManagerBuilder.cpp | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp b/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp index f7b8ef38223..6e0d23961ca 100644 --- a/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp +++ b/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp @@ -99,6 +99,10 @@ static cl::opt<bool> EnableNonLTOGlobalsModRef( cl::desc( "Enable the GlobalsModRef AliasAnalysis outside of the LTO pipeline.")); +static cl::opt<bool> EnableLoopLoadElim( + "enable-loop-load-elim", cl::init(false), cl::Hidden, + cl::desc("Enable the new, experimental LoopLoadElimination Pass")); + PassManagerBuilder::PassManagerBuilder() { OptLevel = 2; SizeLevel = 0; @@ -378,6 +382,12 @@ void PassManagerBuilder::populateModulePassManager( MPM.add(createLoopDistributePass()); MPM.add(createLoopVectorizePass(DisableUnrollLoops, LoopVectorize)); + + // Eliminate loads by forwarding stores from the previous iteration to loads + // of the current iteration. + if (EnableLoopLoadElim) + MPM.add(createLoopLoadEliminationPass()); + // FIXME: Because of #pragma vectorize enable, the passes below are always // inserted in the pipeline, even when the vectorizer doesn't run (ex. when // on -O1 and no #pragma is found). Would be good to have these two passes |
