From 3fc5b01d38ddccbe53ff0b32cc0100351d698c66 Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Thu, 17 May 2007 18:19:23 +0000 Subject: [PATCH] disable MaskedValueIsZero, ComputeMaskedBits, and SimplifyDemandedBits for i128 integers. The 64-bit masks are not wide enough to represent the results. These should be converted to APInt someday. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37169 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/SelectionDAG/TargetLowering.cpp | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/lib/CodeGen/SelectionDAG/TargetLowering.cpp b/lib/CodeGen/SelectionDAG/TargetLowering.cpp index 970533b9a51..a0125d395d1 100644 --- a/lib/CodeGen/SelectionDAG/TargetLowering.cpp +++ b/lib/CodeGen/SelectionDAG/TargetLowering.cpp @@ -365,6 +365,11 @@ bool TargetLowering::SimplifyDemandedBits(SDOperand Op, uint64_t DemandedMask, TargetLoweringOpt &TLO, unsigned Depth) const { KnownZero = KnownOne = 0; // Don't know anything. + + // The masks are not wide enough to represent this type! Should use APInt. + if (Op.getValueType() == MVT::i128) + return false; + // Other users may use these bits. if (!Op.Val->hasOneUse()) { if (Depth != 0) { @@ -874,6 +879,10 @@ bool TargetLowering::SimplifyDemandedBits(SDOperand Op, uint64_t DemandedMask, /// for bits that V cannot have. bool TargetLowering::MaskedValueIsZero(SDOperand Op, uint64_t Mask, unsigned Depth) const { + // The masks are not wide enough to represent this type! Should use APInt. + if (Op.getValueType() == MVT::i128) + return false; + uint64_t KnownZero, KnownOne; ComputeMaskedBits(Op, Mask, KnownZero, KnownOne, Depth); assert((KnownZero & KnownOne) == 0 && "Bits known to be one AND zero?"); @@ -891,6 +900,10 @@ void TargetLowering::ComputeMaskedBits(SDOperand Op, uint64_t Mask, if (Depth == 6 || Mask == 0) return; // Limit search depth. + // The masks are not wide enough to represent this type! Should use APInt. + if (Op.getValueType() == MVT::i128) + return; + uint64_t KnownZero2, KnownOne2; switch (Op.getOpcode()) { -- 2.34.1