From fc447d9b3b0d8ddfbc4b39e2932baa1327e4eece Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Wed, 29 Apr 2009 03:45:07 +0000 Subject: Disable the load-shrinking optimization from looking at anything larger than 64-bits, avoiding a crash. This should really be fixed to use APInts, though type legalization happens to help us out and we get good code on the attached testcase at least. This fixes rdar://6836460 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70360 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/SelectionDAG/TargetLowering.cpp | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) (limited to 'lib/CodeGen') diff --git a/lib/CodeGen/SelectionDAG/TargetLowering.cpp b/lib/CodeGen/SelectionDAG/TargetLowering.cpp index 96f815f..4de6e35 100644 --- a/lib/CodeGen/SelectionDAG/TargetLowering.cpp +++ b/lib/CodeGen/SelectionDAG/TargetLowering.cpp @@ -1538,19 +1538,22 @@ TargetLowering::SimplifySetCC(MVT VT, SDValue N0, SDValue N1, N0.getOperand(0).getNode()->hasOneUse() && isa(N0.getOperand(1))) { LoadSDNode *Lod = cast(N0.getOperand(0)); - uint64_t Mask = cast(N0.getOperand(1))->getZExtValue(); uint64_t bestMask = 0; unsigned bestWidth = 0, bestOffset = 0; - if (!Lod->isVolatile() && Lod->isUnindexed()) { + if (!Lod->isVolatile() && Lod->isUnindexed() && + // FIXME: This uses getZExtValue() below so it only works on i64 and + // below. + N0.getValueType().getSizeInBits() <= 64) { unsigned origWidth = N0.getValueType().getSizeInBits(); // We can narrow (e.g.) 16-bit extending loads on 32-bit target to // 8 bits, but have to be careful... if (Lod->getExtensionType() != ISD::NON_EXTLOAD) origWidth = Lod->getMemoryVT().getSizeInBits(); + uint64_t Mask =cast(N0.getOperand(1))->getZExtValue(); for (unsigned width = origWidth / 2; width>=8; width /= 2) { uint64_t newMask = (1ULL << width) - 1; for (unsigned offset=0; offsetisLittleEndian()) bestOffset = (origWidth/width - offset - 1) * (width/8); else -- cgit v1.1