diff options
Diffstat (limited to 'llvm/lib/Transforms/Scalar/LoopUnrollPass.cpp')
| -rw-r--r-- | llvm/lib/Transforms/Scalar/LoopUnrollPass.cpp | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/llvm/lib/Transforms/Scalar/LoopUnrollPass.cpp b/llvm/lib/Transforms/Scalar/LoopUnrollPass.cpp index a6d7849010c..fb50a3562ac 100644 --- a/llvm/lib/Transforms/Scalar/LoopUnrollPass.cpp +++ b/llvm/lib/Transforms/Scalar/LoopUnrollPass.cpp @@ -115,6 +115,10 @@ static cl::opt<bool> cl::desc("Allows loops to be peeled when the dynamic " "trip count is known to be low.")); +static cl::opt<bool> UnrollUnrollRemainder( + "unroll-remainder", cl::Hidden, + cl::desc("Allow the loop remainder to be unrolled.")); + // This option isn't ever intended to be enabled, it serves to allow // experiments to check the assumptions about when this kind of revisit is // necessary. @@ -153,6 +157,7 @@ static TargetTransformInfo::UnrollingPreferences gatherUnrollingPreferences( UP.Partial = false; UP.Runtime = false; UP.AllowRemainder = true; + UP.UnrollRemainder = false; UP.AllowExpensiveTripCount = false; UP.Force = false; UP.UpperBound = false; @@ -188,6 +193,8 @@ static TargetTransformInfo::UnrollingPreferences gatherUnrollingPreferences( UP.UpperBound = false; if (UnrollAllowPeeling.getNumOccurrences() > 0) UP.AllowPeeling = UnrollAllowPeeling; + if (UnrollUnrollRemainder.getNumOccurrences() > 0) + UP.UnrollRemainder = UnrollUnrollRemainder; // Apply user values provided by argument if (UserThreshold.hasValue()) { @@ -1034,7 +1041,8 @@ static bool tryToUnrollLoop( // Unroll the loop. if (!UnrollLoop(L, UP.Count, TripCount, UP.Force, UP.Runtime, UP.AllowExpensiveTripCount, UseUpperBound, MaxOrZero, - TripMultiple, UP.PeelCount, LI, &SE, &DT, &AC, &ORE, + TripMultiple, UP.PeelCount, UP.UnrollRemainder, + LI, &SE, &DT, &AC, &ORE, PreserveLCSSA)) return false; |
