diff options
Diffstat (limited to 'lib/Transforms/Scalar/LoopStrengthReduce.cpp')
| -rw-r--r-- | lib/Transforms/Scalar/LoopStrengthReduce.cpp | 31 |
1 files changed, 19 insertions, 12 deletions
diff --git a/lib/Transforms/Scalar/LoopStrengthReduce.cpp b/lib/Transforms/Scalar/LoopStrengthReduce.cpp index ac4aea2..5abc790 100644 --- a/lib/Transforms/Scalar/LoopStrengthReduce.cpp +++ b/lib/Transforms/Scalar/LoopStrengthReduce.cpp @@ -253,7 +253,8 @@ static void DoInitialMatch(const SCEV *S, Loop *L, DoInitialMatch(AR->getStart(), L, Good, Bad, SE); DoInitialMatch(SE.getAddRecExpr(SE.getConstant(AR->getType(), 0), AR->getStepRecurrence(SE), - AR->getLoop()), + // FIXME: AR->getNoWrapFlags() + AR->getLoop(), SCEV::FlagAnyWrap), L, Good, Bad, SE); return; } @@ -455,7 +456,10 @@ static const SCEV *getExactSDiv(const SCEV *LHS, const SCEV *RHS, const SCEV *Start = getExactSDiv(AR->getStart(), RHS, SE, IgnoreSignificantBits); if (!Start) return 0; - return SE.getAddRecExpr(Start, Step, AR->getLoop()); + // FlagNW is independent of the start value, step direction, and is + // preserved with smaller magnitude steps. + // FIXME: AR->getNoWrapFlags(SCEV::FlagNW) + return SE.getAddRecExpr(Start, Step, AR->getLoop(), SCEV::FlagAnyWrap); } return 0; } @@ -520,7 +524,9 @@ static int64_t ExtractImmediate(const SCEV *&S, ScalarEvolution &SE) { SmallVector<const SCEV *, 8> NewOps(AR->op_begin(), AR->op_end()); int64_t Result = ExtractImmediate(NewOps.front(), SE); if (Result != 0) - S = SE.getAddRecExpr(NewOps, AR->getLoop()); + S = SE.getAddRecExpr(NewOps, AR->getLoop(), + // FIXME: AR->getNoWrapFlags(SCEV::FlagNW) + SCEV::FlagAnyWrap); return Result; } return 0; @@ -545,7 +551,9 @@ static GlobalValue *ExtractSymbol(const SCEV *&S, ScalarEvolution &SE) { SmallVector<const SCEV *, 8> NewOps(AR->op_begin(), AR->op_end()); GlobalValue *Result = ExtractSymbol(NewOps.front(), SE); if (Result) - S = SE.getAddRecExpr(NewOps, AR->getLoop()); + S = SE.getAddRecExpr(NewOps, AR->getLoop(), + // FIXME: AR->getNoWrapFlags(SCEV::FlagNW) + SCEV::FlagAnyWrap); return Result; } return 0; @@ -564,9 +572,6 @@ static bool isAddressUse(Instruction *Inst, Value *OperandVal) { switch (II->getIntrinsicID()) { default: break; case Intrinsic::prefetch: - case Intrinsic::x86_sse2_loadu_dq: - case Intrinsic::x86_sse2_loadu_pd: - case Intrinsic::x86_sse_loadu_ps: case Intrinsic::x86_sse_storeu_ps: case Intrinsic::x86_sse2_storeu_pd: case Intrinsic::x86_sse2_storeu_dq: @@ -781,7 +786,7 @@ void Cost::RateFormula(const Formula &F, } } -/// Loose - Set this cost to a loosing value. +/// Loose - Set this cost to a losing value. void Cost::Loose() { NumRegs = ~0u; AddRecCost = ~0u; @@ -1483,7 +1488,7 @@ void LSRInstance::OptimizeShadowIV() { if (!C->getValue().isStrictlyPositive()) continue; /* Add new PHINode. */ - PHINode *NewPH = PHINode::Create(DestTy, "IV.S.", PH); + PHINode *NewPH = PHINode::Create(DestTy, 2, "IV.S.", PH); /* create new increment. '++d' in above example. */ Constant *CFP = ConstantFP::get(DestTy, C->getZExtValue()); @@ -1819,7 +1824,7 @@ LSRInstance::OptimizeLoopTermCond() { } } -/// reconcileNewOffset - Determine if the given use can accomodate a fixup +/// reconcileNewOffset - Determine if the given use can accommodate a fixup /// at the given offset and other details. If so, update the use and /// return true. bool @@ -2236,7 +2241,9 @@ static void CollectSubexprs(const SCEV *S, const SCEVConstant *C, if (!AR->getStart()->isZero()) { CollectSubexprs(SE.getAddRecExpr(SE.getConstant(AR->getType(), 0), AR->getStepRecurrence(SE), - AR->getLoop()), + AR->getLoop(), + //FIXME: AR->getNoWrapFlags(SCEV::FlagNW) + SCEV::FlagAnyWrap), C, Ops, L, SE); CollectSubexprs(AR->getStart(), C, Ops, L, SE); return; @@ -3047,7 +3054,7 @@ void LSRInstance::NarrowSearchSpaceByCollapsingUnrolledCode() { } } -/// NarrowSearchSpaceByRefilteringUndesirableDedicatedRegisters - Call +/// NarrowSearchSpaceByRefilteringUndesirableDedicatedRegisters - Call /// FilterOutUndesirableDedicatedRegisters again, if necessary, now that /// we've done more filtering, as it may be able to find more formulae to /// eliminate. |
