From 9d5b41624003daf259b33fc953aa471049700353 Mon Sep 17 00:00:00 2001 From: Owen Anderson Date: Wed, 27 Aug 2008 00:31:01 +0000 Subject: [PATCH] Add support for fast isel of inttoptr and ptrtoint in the cases where truncation is not needed. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55399 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/SelectionDAG/FastISel.cpp | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/lib/CodeGen/SelectionDAG/FastISel.cpp b/lib/CodeGen/SelectionDAG/FastISel.cpp index 59bc8c5b333..64843f8b558 100644 --- a/lib/CodeGen/SelectionDAG/FastISel.cpp +++ b/lib/CodeGen/SelectionDAG/FastISel.cpp @@ -388,6 +388,25 @@ FastISel::SelectInstructions(BasicBlock::iterator Begin, if (!SelectConstantCast(I, ISD::SINT_TO_FP, ValueMap)) return I; break; + case Instruction::IntToPtr: // Deliberate fall-through. + case Instruction::PtrToInt: { + MVT SrcVT = TLI.getValueType(I->getOperand(0)->getType()); + MVT DstVT = TLI.getValueType(I->getType()); + if (SrcVT.getSimpleVT() == DstVT.getSimpleVT()) { + ValueMap[I] = ValueMap[I->getOperand(0)]; + break; + } else if (DstVT.bitsGT(SrcVT)) { + if (!isa(I->getOperand(0))) { + if (!SelectCast(I, ISD::ZERO_EXTEND, ValueMap)) return I; + } else + if (!SelectConstantCast(I, ISD::ZERO_EXTEND, ValueMap)) return I; + break; + } else { + // TODO: Handle SrcVT > DstVT, where truncation is needed. + return I; + } + } + default: // Unhandled instruction. Halt "fast" selection and bail. return I;