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disable MaskedValueIsZero, ComputeMaskedBits, and SimplifyDemandedBits for

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i128 integers.  The 64-bit masks are not wide enough to represent the results.
These should be converted to APInt someday.

llvm-svn: 37169
This commit is contained in:
Chris Lattner 2007-05-17 18:19:23 +00:00
parent d441344214
commit 910abfbfd1
1 changed files with 13 additions and 0 deletions
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13
lib/CodeGen/SelectionDAG/TargetLowering.cpp
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@ -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()) {