From 19a83990e1e0d9fb9a1a61e11b95eb04770a4cc9 Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Fri, 7 Jan 2005 21:56:57 +0000 Subject: Implement support for long GEP indices on 32-bit archs and support for int GEP indices on 64-bit archs. llvm-svn: 19354 --- llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp | 17 ++++++++++++++--- 1 file changed, 14 insertions(+), 3 deletions(-) (limited to 'llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp') diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp index 4ba16f6d982..167d2f7e359 100644 --- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp +++ b/llvm/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); } } -- cgit v1.2.3