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get the first few tags from a precomputed table (count can be increased if desired)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108549 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -86,6 +86,15 @@ const Use *Use::getImpliedUser() const {
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//===----------------------------------------------------------------------===//
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Use *Use::initTags(Use * const Start, Use *Stop, ptrdiff_t Done) {
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while (Done < 6) {
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if (Start == Stop--)
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return Start;
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static const PrevPtrTag tags[6] = { fullStopTag, oneDigitTag, stopTag,
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oneDigitTag, oneDigitTag, stopTag };
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Stop->Prev.setFromOpaqueValue(reinterpret_cast<Use**>(tags[Done++]));
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Stop->Val = 0;
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}
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ptrdiff_t Count = Done;
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while (Start != Stop) {
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--Stop;
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