diff options
Diffstat (limited to 'lib/VMCore/Type.cpp')
| -rw-r--r-- | lib/VMCore/Type.cpp | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/lib/VMCore/Type.cpp b/lib/VMCore/Type.cpp index 3704999ede..ba50e0757e 100644 --- a/lib/VMCore/Type.cpp +++ b/lib/VMCore/Type.cpp @@ -173,10 +173,20 @@ bool Type::canLosslesslyBitCastTo(const Type *Ty) const { return false; // Vector -> Vector conversions are always lossless if the two vector types - // have the same size, otherwise not. - if (const VectorType *thisPTy = dyn_cast<VectorType>(this)) + // have the same size, otherwise not. Also, 64-bit vector types can be + // converted to x86mmx. + if (const VectorType *thisPTy = dyn_cast<VectorType>(this)) { if (const VectorType *thatPTy = dyn_cast<VectorType>(Ty)) return thisPTy->getBitWidth() == thatPTy->getBitWidth(); + if (Ty->getTypeID() == Type::X86_MMXTyID && + thisPTy->getBitWidth() == 64) + return true; + } + + if (this->getTypeID() == Type::X86_MMXTyID) + if (const VectorType *thatPTy = dyn_cast<VectorType>(Ty)) + if (thatPTy->getBitWidth() == 64) + return true; // At this point we have only various mismatches of the first class types // remaining and ptr->ptr. Just select the lossless conversions. Everything |