From: David Greene Date: Mon, 8 Jun 2009 19:16:56 +0000 (+0000) Subject: Make !if short-circuit when possible. X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=77c489dcae2d7906fae653e2d25e023004d1b9e4;p=oota-llvm.git Make !if short-circuit when possible. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73076 91177308-0d34-0410-b5e6-96231b3b80d8 --- diff --git a/utils/TableGen/Record.cpp b/utils/TableGen/Record.cpp index 47cab7b5db8..18584ec8a01 100644 --- a/utils/TableGen/Record.cpp +++ b/utils/TableGen/Record.cpp @@ -965,9 +965,25 @@ Init *TernOpInit::Fold(Record *CurRec, MultiClass *CurMultiClass) { Init *TernOpInit::resolveReferences(Record &R, const RecordVal *RV) { Init *lhs = LHS->resolveReferences(R, RV); + + if (Opc == IF && lhs != LHS) { + IntInit *Value = dynamic_cast(lhs); + if (Value != 0) { + // Short-circuit + if (Value->getValue()) { + Init *mhs = MHS->resolveReferences(R, RV); + return (new TernOpInit(getOpcode(), lhs, mhs, RHS, getType()))->Fold(&R, 0); + } + else { + Init *rhs = RHS->resolveReferences(R, RV); + return (new TernOpInit(getOpcode(), lhs, MHS, rhs, getType()))->Fold(&R, 0); + } + } + } + Init *mhs = MHS->resolveReferences(R, RV); Init *rhs = RHS->resolveReferences(R, RV); - + if (LHS != lhs || MHS != mhs || RHS != rhs) return (new TernOpInit(getOpcode(), lhs, mhs, rhs, getType()))->Fold(&R, 0); return Fold(&R, 0);