From bceddbdc919fc2ca7bc8c3911586ba93367686f0 Mon Sep 17 00:00:00 2001 From: Ken Dyck Date: Thu, 17 Dec 2009 20:09:43 +0000 Subject: Introduce EVT::getHalfSizedIntegerVT() for use in ExpandUnalignedStore() in LegalizeDAG.cpp. Unlike the code it replaces, which simply decrements the simple type by one, getHalfSizedIntegerVT() searches for the smallest simple integer type that is at least half the size of the type it is called on. This approach has the advantage that it will continue working if a new value type (such as i24) is added to MVT. Also, in preparation for new value types, remove the assertions that non-power-of-2 8-bit-mutiple types are Extended when legalizing extload and truncstore operations. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91614 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/SelectionDAG/LegalizeDAG.cpp | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-) (limited to 'lib/CodeGen') diff --git a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp index f9c05d081d..300e6eba13 100644 --- a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp +++ b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp @@ -461,8 +461,7 @@ SDValue ExpandUnalignedStore(StoreSDNode *ST, SelectionDAG &DAG, !ST->getMemoryVT().isVector() && "Unaligned store of unknown type."); // Get the half-size VT - EVT NewStoredVT = - (MVT::SimpleValueType)(ST->getMemoryVT().getSimpleVT().SimpleTy - 1); + EVT NewStoredVT = ST->getMemoryVT().getHalfSizedIntegerVT(*DAG.getContext()); int NumBits = NewStoredVT.getSizeInBits(); int IncrementSize = NumBits / 8; @@ -1170,8 +1169,7 @@ SDValue SelectionDAGLegalize::LegalizeOp(SDValue Op) { Tmp2 = LegalizeOp(Ch); } else if (SrcWidth & (SrcWidth - 1)) { // If not loading a power-of-2 number of bits, expand as two loads. - assert(SrcVT.isExtended() && !SrcVT.isVector() && - "Unsupported extload!"); + assert(!SrcVT.isVector() && "Unsupported extload!"); unsigned RoundWidth = 1 << Log2_32(SrcWidth); assert(RoundWidth < SrcWidth); unsigned ExtraWidth = SrcWidth - RoundWidth; @@ -1384,8 +1382,7 @@ SDValue SelectionDAGLegalize::LegalizeOp(SDValue Op) { SVOffset, NVT, isVolatile, Alignment); } else if (StWidth & (StWidth - 1)) { // If not storing a power-of-2 number of bits, expand as two stores. - assert(StVT.isExtended() && !StVT.isVector() && - "Unsupported truncstore!"); + assert(!StVT.isVector() && "Unsupported truncstore!"); unsigned RoundWidth = 1 << Log2_32(StWidth); assert(RoundWidth < StWidth); unsigned ExtraWidth = StWidth - RoundWidth; -- cgit v1.2.3-70-g09d2