if (SrcTy == DestTy)
return true;
+ if (const VectorType *SrcVecTy = dyn_cast<VectorType>(SrcTy))
+ if (const VectorType *DestVecTy = dyn_cast<VectorType>(DestTy))
+ if (SrcVecTy->getNumElements() == DestVecTy->getNumElements()) {
+ // An element by element cast. Valid if casting the elements is valid.
+ SrcTy = SrcVecTy->getElementType();
+ DestTy = DestVecTy->getElementType();
+ }
+
// Get the bit sizes, we'll need these
unsigned SrcBits = SrcTy->getScalarSizeInBits(); // 0 for ptr
unsigned DestBits = DestTy->getScalarSizeInBits(); // 0 for ptr
Instruction::CastOps
CastInst::getCastOpcode(
const Value *Src, bool SrcIsSigned, const Type *DestTy, bool DestIsSigned) {
- // Get the bit sizes, we'll need these
const Type *SrcTy = Src->getType();
- unsigned SrcBits = SrcTy->getScalarSizeInBits(); // 0 for ptr
- unsigned DestBits = DestTy->getScalarSizeInBits(); // 0 for ptr
assert(SrcTy->isFirstClassType() && DestTy->isFirstClassType() &&
"Only first class types are castable!");
+ if (SrcTy == DestTy)
+ return BitCast;
+
+ if (const VectorType *SrcVecTy = dyn_cast<VectorType>(SrcTy))
+ if (const VectorType *DestVecTy = dyn_cast<VectorType>(DestTy))
+ if (SrcVecTy->getNumElements() == DestVecTy->getNumElements()) {
+ // An element by element cast. Find the appropriate opcode based on the
+ // element types.
+ SrcTy = SrcVecTy->getElementType();
+ DestTy = DestVecTy->getElementType();
+ }
+
+ // Get the bit sizes, we'll need these
+ unsigned SrcBits = SrcTy->getScalarSizeInBits(); // 0 for ptr
+ unsigned DestBits = DestTy->getScalarSizeInBits(); // 0 for ptr
+
// Run through the possibilities ...
if (DestTy->isIntegerTy()) { // Casting to integral
if (SrcTy->isIntegerTy()) { // Casting from integral
if (const VectorType *SrcPTy = dyn_cast<VectorType>(SrcTy)) {
assert(DestPTy->getBitWidth() == SrcPTy->getBitWidth() &&
"Casting vector to vector of different widths");
- SrcPTy = NULL;
+ (void)SrcPTy;
return BitCast; // vector -> vector
} else if (DestPTy->getBitWidth() == SrcBits) {
return BitCast; // float/int -> vector
const Type* Int8Ty = Type::getInt8Ty(C);
const Type* Int64Ty = Type::getInt64Ty(C);
const Type* V8x8Ty = VectorType::get(Int8Ty, 8);
+ const Type* V8x64Ty = VectorType::get(Int64Ty, 8);
const Type* X86MMXTy = Type::getX86_MMXTy(C);
+ const Constant* c8 = Constant::getNullValue(V8x8Ty);
+ const Constant* c64 = Constant::getNullValue(V8x64Ty);
+
EXPECT_TRUE(CastInst::isCastable(V8x8Ty, X86MMXTy));
EXPECT_TRUE(CastInst::isCastable(X86MMXTy, V8x8Ty));
EXPECT_FALSE(CastInst::isCastable(Int64Ty, X86MMXTy));
+ EXPECT_TRUE(CastInst::isCastable(V8x64Ty, V8x8Ty));
+ EXPECT_TRUE(CastInst::isCastable(V8x8Ty, V8x64Ty));
+ EXPECT_EQ(CastInst::getCastOpcode(c64, true, V8x8Ty, true), CastInst::Trunc);
+ EXPECT_EQ(CastInst::getCastOpcode(c8, true, V8x64Ty, true), CastInst::SExt);
}
} // end anonymous namespace