From 7cc4777a263f6a52877d29201311fde5f6edb632 Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Fri, 7 Jan 2005 21:56:57 +0000 Subject: [PATCH] Implement support for long GEP indices on 32-bit archs and support for int GEP indices on 64-bit archs. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19354 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/SelectionDAG/LegalizeDAG.cpp | 1 + lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp | 17 ++++++++++++++--- 2 files changed, 15 insertions(+), 3 deletions(-) diff --git a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp index cbc2aabc478..42f217a6741 100644 --- a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp +++ b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp @@ -529,6 +529,7 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) { break; case ISD::ZERO_EXTEND: case ISD::SIGN_EXTEND: + case ISD::TRUNCATE: case ISD::FP_EXTEND: case ISD::FP_ROUND: switch (getTypeAction(Node->getOperand(0).getValueType())) { diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp index 4ba16f6d982..167d2f7e359 100644 --- a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp +++ b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp @@ -477,9 +477,20 @@ void SelectionDAGLowering::visitGetElementPtr(User &I) { if (!isa(Idx) || !cast(Idx)->isNullValue()) { // N = N + Idx * ElementSize; uint64_t ElementSize = TD.getTypeSize(Ty); - SDOperand IdxN = getValue(Idx); - IdxN = DAG.getNode(ISD::MUL, N.getValueType(), IdxN, - getIntPtrConstant(ElementSize)); + SDOperand IdxN = getValue(Idx), Scale = getIntPtrConstant(ElementSize); + + // If the index is smaller or larger than intptr_t, truncate or extend + // it. + if (IdxN.getValueType() < Scale.getValueType()) { + if (Idx->getType()->isSigned()) + IdxN = DAG.getNode(ISD::SIGN_EXTEND, Scale.getValueType(), IdxN); + else + IdxN = DAG.getNode(ISD::ZERO_EXTEND, Scale.getValueType(), IdxN); + } else if (IdxN.getValueType() > Scale.getValueType()) + IdxN = DAG.getNode(ISD::TRUNCATE, Scale.getValueType(), IdxN); + + IdxN = DAG.getNode(ISD::MUL, N.getValueType(), IdxN, Scale); + N = DAG.getNode(ISD::ADD, N.getValueType(), N, IdxN); } }