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
diff --git a/lib/CodeGen/SelectionDAG/TargetLowering.cpp b/lib/CodeGen/SelectionDAG/TargetLowering.cpp
index 970533b..a0125d3 100644
--- a/lib/CodeGen/SelectionDAG/TargetLowering.cpp
+++ b/lib/CodeGen/SelectionDAG/TargetLowering.cpp
@@ -365,6 +365,11 @@
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 @@
/// 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 @@
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()) {