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Modify the TargetLowering::getPackedTypeBreakdown method to also return the

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unpromoted element type.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27273 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2006-03-31 00:46:36 +00:00
parent fb47a9b1c8
commit 79227e2906
2 changed files with 13 additions and 7 deletions
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9
include/llvm/Target/TargetLowering.h
View File

@ -178,10 +178,13 @@ public:
/// with Altivec or SSE1, or 8 promoted MVT::f64 values with the X86 FP stack.
/// Similarly, <2 x long> turns into 4 MVT::i32 values with both PPC and X86.
///
/// This method returns the number and type of the resultant breakdown.
/// This method returns the number of registers needed, and the VT for each
/// register. It also returns the VT of the PackedType elements before they
/// are promoted/expanded.
///
MVT::ValueType getPackedTypeBreakdown(const PackedType *PTy,
unsigned &NE) const;
unsigned getPackedTypeBreakdown(const PackedType *PTy,
MVT::ValueType &PTyElementVT,
MVT::ValueType &PTyLegalElementVT) const;
typedef std::vector<double>::const_iterator legal_fpimm_iterator;
legal_fpimm_iterator legal_fpimm_begin() const {

11
lib/CodeGen/SelectionDAG/TargetLowering.cpp
View File

@ -148,11 +148,13 @@ const char *TargetLowering::getTargetNodeName(unsigned Opcode) const {
///
/// This method returns the number and type of the resultant breakdown.
///
MVT::ValueType TargetLowering::getPackedTypeBreakdown(const PackedType *PTy,
unsigned &NumVals) const {
unsigned TargetLowering::getPackedTypeBreakdown(const PackedType *PTy,
MVT::ValueType &PTyElementVT,
MVT::ValueType &PTyLegalElementVT) const {
// Figure out the right, legal destination reg to copy into.
unsigned NumElts = PTy->getNumElements();
MVT::ValueType EltTy = getValueType(PTy->getElementType());
PTyElementVT = EltTy;
unsigned NumVectorRegs = 1;
@ -170,13 +172,14 @@ MVT::ValueType TargetLowering::getPackedTypeBreakdown(const PackedType *PTy,
VT = getVectorType(EltTy, NumElts);
MVT::ValueType DestVT = getTypeToTransformTo(VT);
PTyLegalElementVT = DestVT;
if (DestVT < VT) {
// Value is expanded, e.g. i64 -> i16.
NumVals = NumVectorRegs*(MVT::getSizeInBits(VT)/MVT::getSizeInBits(DestVT));
return NumVectorRegs*(MVT::getSizeInBits(VT)/MVT::getSizeInBits(DestVT));
} else {
// Otherwise, promotion or legal types use the same number of registers as
// the vector decimated to the appropriate level.
NumVals = NumVectorRegs;
return NumVectorRegs;
}
return DestVT;