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Differential D64126

# Enter a commit message. # # Changes: # # lib/Analysis/ScalarEvolution.cpp [Scalar Evolution][Test] Disable distribution of truncation.
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Authored by ebrevnov on Jul 3 2019, 2:51 AM.

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ebrevnov created this revision.Jul 3 2019, 2:51 AM
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Harbormaster completed remote builds in B34260: Diff 207739.Jul 3 2019, 2:52 AM
ebrevnov abandoned this revision.Jul 3 2019, 2:56 AM

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lib/
Analysis/
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Diff 207739

lib/Analysis/ScalarEvolution.cpp

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Show First 20 Lines • Show All 1,312 Lines • ▼ Show 20 Lines if (isa<SCEVAddExpr>(Op) || isa<SCEVMulExpr>(Op)) {
// Although we checked in the beginning that ID is not in the cache, it is // Although we checked in the beginning that ID is not in the cache, it is
// possible that during recursion and different modification ID was inserted // possible that during recursion and different modification ID was inserted
// into the cache. So if we find it, just return it. // into the cache. So if we find it, just return it.
if (const SCEV *S = UniqueSCEVs.FindNodeOrInsertPos(ID, IP)) if (const SCEV *S = UniqueSCEVs.FindNodeOrInsertPos(ID, IP))
return S; return S;
} }
// If the input value is a chrec scev, truncate the chrec's operands. // If the input value is a chrec scev, truncate the chrec's operands.
if (const SCEVAddRecExpr *AddRec = dyn_cast<SCEVAddRecExpr>(Op)) { // if (const SCEVAddRecExpr *AddRec = dyn_cast<SCEVAddRecExpr>(Op)) {
SmallVector<const SCEV *, 4> Operands; // SmallVector<const SCEV *, 4> Operands;
for (const SCEV *Op : AddRec->operands()) // for (const SCEV *Op : AddRec->operands())
Operands.push_back(getTruncateExpr(Op, Ty, Depth + 1)); // Operands.push_back(getTruncateExpr(Op, Ty, Depth + 1));
return getAddRecExpr(Operands, AddRec->getLoop(), SCEV::FlagAnyWrap); // return getAddRecExpr(Operands, AddRec->getLoop(), SCEV::FlagAnyWrap);
} // }
// The cast wasn't folded; create an explicit cast node. We can reuse // The cast wasn't folded; create an explicit cast node. We can reuse
// the existing insert position since if we get here, we won't have // the existing insert position since if we get here, we won't have
// made any changes which would invalidate it. // made any changes which would invalidate it.
SCEV *S = new (SCEVAllocator) SCEVTruncateExpr(ID.Intern(SCEVAllocator), SCEV *S = new (SCEVAllocator) SCEVTruncateExpr(ID.Intern(SCEVAllocator),
Op, Ty); Op, Ty);
UniqueSCEVs.InsertNode(S, IP); UniqueSCEVs.InsertNode(S, IP);
addToLoopUseLists(S); addToLoopUseLists(S);
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