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-rw-r--r--include/llvm/IR/DataLayout.h125
1 files changed, 76 insertions, 49 deletions
diff --git a/include/llvm/IR/DataLayout.h b/include/llvm/IR/DataLayout.h
index ac9770a15120..85093dd218f8 100644
--- a/include/llvm/IR/DataLayout.h
+++ b/include/llvm/IR/DataLayout.h
@@ -25,10 +25,11 @@
#include "llvm/ADT/StringRef.h"
#include "llvm/IR/DerivedTypes.h"
#include "llvm/IR/Type.h"
-#include "llvm/Pass.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/MathExtras.h"
+#include "llvm/Support/Alignment.h"
+#include "llvm/Support/TypeSize.h"
#include <cassert>
#include <cstdint>
#include <string>
@@ -71,11 +72,11 @@ struct LayoutAlignElem {
/// Alignment type from \c AlignTypeEnum
unsigned AlignType : 8;
unsigned TypeBitWidth : 24;
- unsigned ABIAlign : 16;
- unsigned PrefAlign : 16;
+ Align ABIAlign;
+ Align PrefAlign;
- static LayoutAlignElem get(AlignTypeEnum align_type, unsigned abi_align,
- unsigned pref_align, uint32_t bit_width);
+ static LayoutAlignElem get(AlignTypeEnum align_type, Align abi_align,
+ Align pref_align, uint32_t bit_width);
bool operator==(const LayoutAlignElem &rhs) const;
};
@@ -87,15 +88,15 @@ struct LayoutAlignElem {
/// \note The unusual order of elements in the structure attempts to reduce
/// padding and make the structure slightly more cache friendly.
struct PointerAlignElem {
- unsigned ABIAlign;
- unsigned PrefAlign;
+ Align ABIAlign;
+ Align PrefAlign;
uint32_t TypeByteWidth;
uint32_t AddressSpace;
uint32_t IndexWidth;
/// Initializer
- static PointerAlignElem get(uint32_t AddressSpace, unsigned ABIAlign,
- unsigned PrefAlign, uint32_t TypeByteWidth,
+ static PointerAlignElem get(uint32_t AddressSpace, Align ABIAlign,
+ Align PrefAlign, uint32_t TypeByteWidth,
uint32_t IndexWidth);
bool operator==(const PointerAlignElem &rhs) const;
@@ -120,10 +121,10 @@ private:
bool BigEndian;
unsigned AllocaAddrSpace;
- unsigned StackNaturalAlign;
+ MaybeAlign StackNaturalAlign;
unsigned ProgramAddrSpace;
- unsigned FunctionPtrAlign;
+ MaybeAlign FunctionPtrAlign;
FunctionPtrAlignType TheFunctionPtrAlignType;
enum ManglingModeT {
@@ -172,16 +173,15 @@ private:
/// well-defined bitwise representation.
SmallVector<unsigned, 8> NonIntegralAddressSpaces;
- void setAlignment(AlignTypeEnum align_type, unsigned abi_align,
- unsigned pref_align, uint32_t bit_width);
- unsigned getAlignmentInfo(AlignTypeEnum align_type, uint32_t bit_width,
- bool ABIAlign, Type *Ty) const;
- void setPointerAlignment(uint32_t AddrSpace, unsigned ABIAlign,
- unsigned PrefAlign, uint32_t TypeByteWidth,
- uint32_t IndexWidth);
+ void setAlignment(AlignTypeEnum align_type, Align abi_align, Align pref_align,
+ uint32_t bit_width);
+ Align getAlignmentInfo(AlignTypeEnum align_type, uint32_t bit_width,
+ bool ABIAlign, Type *Ty) const;
+ void setPointerAlignment(uint32_t AddrSpace, Align ABIAlign, Align PrefAlign,
+ uint32_t TypeByteWidth, uint32_t IndexWidth);
/// Internal helper method that returns requested alignment for type.
- unsigned getAlignment(Type *Ty, bool abi_or_pref) const;
+ Align getAlignment(Type *Ty, bool abi_or_pref) const;
/// Parses a target data specification string. Assert if the string is
/// malformed.
@@ -261,17 +261,21 @@ public:
bool isIllegalInteger(uint64_t Width) const { return !isLegalInteger(Width); }
/// Returns true if the given alignment exceeds the natural stack alignment.
- bool exceedsNaturalStackAlignment(unsigned Align) const {
- return (StackNaturalAlign != 0) && (Align > StackNaturalAlign);
+ bool exceedsNaturalStackAlignment(Align Alignment) const {
+ return StackNaturalAlign && (Alignment > StackNaturalAlign);
+ }
+
+ Align getStackAlignment() const {
+ assert(StackNaturalAlign && "StackNaturalAlign must be defined");
+ return *StackNaturalAlign;
}
- unsigned getStackAlignment() const { return StackNaturalAlign; }
unsigned getAllocaAddrSpace() const { return AllocaAddrSpace; }
/// Returns the alignment of function pointers, which may or may not be
/// related to the alignment of functions.
/// \see getFunctionPtrAlignType
- unsigned getFunctionPtrAlign() const { return FunctionPtrAlign; }
+ MaybeAlign getFunctionPtrAlign() const { return FunctionPtrAlign; }
/// Return the type of function pointer alignment.
/// \see getFunctionPtrAlign
@@ -344,12 +348,12 @@ public:
}
/// Layout pointer alignment
- unsigned getPointerABIAlignment(unsigned AS) const;
+ Align getPointerABIAlignment(unsigned AS) const;
/// Return target's alignment for stack-based pointers
/// FIXME: The defaults need to be removed once all of
/// the backends/clients are updated.
- unsigned getPointerPrefAlignment(unsigned AS = 0) const;
+ Align getPointerPrefAlignment(unsigned AS = 0) const;
/// Layout pointer size
/// FIXME: The defaults need to be removed once all of
@@ -433,23 +437,33 @@ public:
/// Returns the number of bits necessary to hold the specified type.
///
+ /// If Ty is a scalable vector type, the scalable property will be set and
+ /// the runtime size will be a positive integer multiple of the base size.
+ ///
/// For example, returns 36 for i36 and 80 for x86_fp80. The type passed must
/// have a size (Type::isSized() must return true).
- uint64_t getTypeSizeInBits(Type *Ty) const;
+ TypeSize getTypeSizeInBits(Type *Ty) const;
/// Returns the maximum number of bytes that may be overwritten by
/// storing the specified type.
///
+ /// If Ty is a scalable vector type, the scalable property will be set and
+ /// the runtime size will be a positive integer multiple of the base size.
+ ///
/// For example, returns 5 for i36 and 10 for x86_fp80.
- uint64_t getTypeStoreSize(Type *Ty) const {
- return (getTypeSizeInBits(Ty) + 7) / 8;
+ TypeSize getTypeStoreSize(Type *Ty) const {
+ TypeSize BaseSize = getTypeSizeInBits(Ty);
+ return { (BaseSize.getKnownMinSize() + 7) / 8, BaseSize.isScalable() };
}
/// Returns the maximum number of bits that may be overwritten by
/// storing the specified type; always a multiple of 8.
///
+ /// If Ty is a scalable vector type, the scalable property will be set and
+ /// the runtime size will be a positive integer multiple of the base size.
+ ///
/// For example, returns 40 for i36 and 80 for x86_fp80.
- uint64_t getTypeStoreSizeInBits(Type *Ty) const {
+ TypeSize getTypeStoreSizeInBits(Type *Ty) const {
return 8 * getTypeStoreSize(Ty);
}
@@ -464,9 +478,12 @@ public:
/// Returns the offset in bytes between successive objects of the
/// specified type, including alignment padding.
///
+ /// If Ty is a scalable vector type, the scalable property will be set and
+ /// the runtime size will be a positive integer multiple of the base size.
+ ///
/// This is the amount that alloca reserves for this type. For example,
/// returns 12 or 16 for x86_fp80, depending on alignment.
- uint64_t getTypeAllocSize(Type *Ty) const {
+ TypeSize getTypeAllocSize(Type *Ty) const {
// Round up to the next alignment boundary.
return alignTo(getTypeStoreSize(Ty), getABITypeAlignment(Ty));
}
@@ -474,18 +491,28 @@ public:
/// Returns the offset in bits between successive objects of the
/// specified type, including alignment padding; always a multiple of 8.
///
+ /// If Ty is a scalable vector type, the scalable property will be set and
+ /// the runtime size will be a positive integer multiple of the base size.
+ ///
/// This is the amount that alloca reserves for this type. For example,
/// returns 96 or 128 for x86_fp80, depending on alignment.
- uint64_t getTypeAllocSizeInBits(Type *Ty) const {
+ TypeSize getTypeAllocSizeInBits(Type *Ty) const {
return 8 * getTypeAllocSize(Ty);
}
/// Returns the minimum ABI-required alignment for the specified type.
unsigned getABITypeAlignment(Type *Ty) const;
+ /// Helper function to return `Alignment` if it's set or the result of
+ /// `getABITypeAlignment(Ty)`, in any case the result is a valid alignment.
+ inline Align getValueOrABITypeAlignment(MaybeAlign Alignment,
+ Type *Ty) const {
+ return Alignment ? *Alignment : Align(getABITypeAlignment(Ty));
+ }
+
/// Returns the minimum ABI-required alignment for an integer type of
/// the specified bitwidth.
- unsigned getABIIntegerTypeAlignment(unsigned BitWidth) const;
+ Align getABIIntegerTypeAlignment(unsigned BitWidth) const;
/// Returns the preferred stack/global alignment for the specified
/// type.
@@ -493,10 +520,6 @@ public:
/// This is always at least as good as the ABI alignment.
unsigned getPrefTypeAlignment(Type *Ty) const;
- /// Returns the preferred alignment for the specified type, returned as
- /// log2 of the value (a shift amount).
- unsigned getPreferredTypeAlignmentShift(Type *Ty) const;
-
/// Returns an integer type with size at least as big as that of a
/// pointer in the given address space.
IntegerType *getIntPtrType(LLVMContext &C, unsigned AddressSpace = 0) const;
@@ -561,7 +584,7 @@ inline LLVMTargetDataRef wrap(const DataLayout *P) {
/// based on the DataLayout structure.
class StructLayout {
uint64_t StructSize;
- unsigned StructAlignment;
+ Align StructAlignment;
unsigned IsPadded : 1;
unsigned NumElements : 31;
uint64_t MemberOffsets[1]; // variable sized array!
@@ -571,7 +594,7 @@ public:
uint64_t getSizeInBits() const { return 8 * StructSize; }
- unsigned getAlignment() const { return StructAlignment; }
+ Align getAlignment() const { return StructAlignment; }
/// Returns whether the struct has padding or not between its fields.
/// NB: Padding in nested element is not taken into account.
@@ -598,13 +621,13 @@ private:
// The implementation of this method is provided inline as it is particularly
// well suited to constant folding when called on a specific Type subclass.
-inline uint64_t DataLayout::getTypeSizeInBits(Type *Ty) const {
+inline TypeSize DataLayout::getTypeSizeInBits(Type *Ty) const {
assert(Ty->isSized() && "Cannot getTypeInfo() on a type that is unsized!");
switch (Ty->getTypeID()) {
case Type::LabelTyID:
- return getPointerSizeInBits(0);
+ return TypeSize::Fixed(getPointerSizeInBits(0));
case Type::PointerTyID:
- return getPointerSizeInBits(Ty->getPointerAddressSpace());
+ return TypeSize::Fixed(getPointerSizeInBits(Ty->getPointerAddressSpace()));
case Type::ArrayTyID: {
ArrayType *ATy = cast<ArrayType>(Ty);
return ATy->getNumElements() *
@@ -612,26 +635,30 @@ inline uint64_t DataLayout::getTypeSizeInBits(Type *Ty) const {
}
case Type::StructTyID:
// Get the layout annotation... which is lazily created on demand.
- return getStructLayout(cast<StructType>(Ty))->getSizeInBits();
+ return TypeSize::Fixed(
+ getStructLayout(cast<StructType>(Ty))->getSizeInBits());
case Type::IntegerTyID:
- return Ty->getIntegerBitWidth();
+ return TypeSize::Fixed(Ty->getIntegerBitWidth());
case Type::HalfTyID:
- return 16;
+ return TypeSize::Fixed(16);
case Type::FloatTyID:
- return 32;
+ return TypeSize::Fixed(32);
case Type::DoubleTyID:
case Type::X86_MMXTyID:
- return 64;
+ return TypeSize::Fixed(64);
case Type::PPC_FP128TyID:
case Type::FP128TyID:
- return 128;
+ return TypeSize::Fixed(128);
// In memory objects this is always aligned to a higher boundary, but
// only 80 bits contain information.
case Type::X86_FP80TyID:
- return 80;
+ return TypeSize::Fixed(80);
case Type::VectorTyID: {
VectorType *VTy = cast<VectorType>(Ty);
- return VTy->getNumElements() * getTypeSizeInBits(VTy->getElementType());
+ auto EltCnt = VTy->getElementCount();
+ uint64_t MinBits = EltCnt.Min *
+ getTypeSizeInBits(VTy->getElementType()).getFixedSize();
+ return TypeSize(MinBits, EltCnt.Scalable);
}
default:
llvm_unreachable("DataLayout::getTypeSizeInBits(): Unsupported type");
generated by cgit v1.2.3 (git 2.25.1) at 2024-10-06 10:28:49 +0000