diff options
Diffstat (limited to 'llvm/lib/Transforms/Scalar/LoopUnrollPass.cpp')
| -rw-r--r-- | llvm/lib/Transforms/Scalar/LoopUnrollPass.cpp | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/llvm/lib/Transforms/Scalar/LoopUnrollPass.cpp b/llvm/lib/Transforms/Scalar/LoopUnrollPass.cpp index 7e9daf0..2fa7436 100644 --- a/llvm/lib/Transforms/Scalar/LoopUnrollPass.cpp +++ b/llvm/lib/Transforms/Scalar/LoopUnrollPass.cpp @@ -71,6 +71,12 @@ using namespace llvm; #define DEBUG_TYPE "loop-unroll" +cl::opt<bool> llvm::ForgetSCEVInLoopUnroll( + "forget-scev-loop-unroll", cl::init(false), cl::Hidden, + cl::desc("Forget everything in SCEV when doing LoopUnroll, instead of just" + " the current top-most loop. This is somtimes preferred to reduce" + " compile time.")); + static cl::opt<unsigned> UnrollThreshold("unroll-threshold", cl::Hidden, cl::desc("The cost threshold for loop unrolling")); @@ -1281,7 +1287,7 @@ PreservedAnalyses LoopFullUnrollPass::run(Loop &L, LoopAnalysisManager &AM, tryToUnrollLoop(&L, AR.DT, &AR.LI, AR.SE, AR.TTI, AR.AC, *ORE, /*BFI*/ nullptr, /*PSI*/ nullptr, /*PreserveLCSSA*/ true, OptLevel, OnlyWhenForced, - /*ForgetAllSCEV*/ false, /*Count*/ None, + ForgetSCEV, /*Count*/ None, /*Threshold*/ None, /*AllowPartial*/ false, /*Runtime*/ false, /*UpperBound*/ false, /*AllowPeeling*/ false) != LoopUnrollResult::Unmodified; @@ -1422,7 +1428,7 @@ PreservedAnalyses LoopUnrollPass::run(Function &F, LoopUnrollResult Result = tryToUnrollLoop( &L, DT, &LI, SE, TTI, AC, ORE, BFI, PSI, /*PreserveLCSSA*/ true, UnrollOpts.OptLevel, UnrollOpts.OnlyWhenForced, - /*ForgetAllSCEV*/ false, /*Count*/ None, + UnrollOpts.ForgetSCEV, /*Count*/ None, /*Threshold*/ None, UnrollOpts.AllowPartial, UnrollOpts.AllowRuntime, UnrollOpts.AllowUpperBound, LocalAllowPeeling); Changed |= Result != LoopUnrollResult::Unmodified; |