[llvm] [DataLayout] Use member initialization (NFC) (PR #103712)
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Wed Aug 14 00:54:32 PDT 2024
llvmbot wrote:
<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-llvm-analysis
Author: Sergei Barannikov (s-barannikov)
<details>
<summary>Changes</summary>
This also adds a default constructor and a few uses of it.
---
Full diff: https://github.com/llvm/llvm-project/pull/103712.diff
6 Files Affected:
- (modified) llvm/include/llvm/IR/DataLayout.h (+27-24)
- (modified) llvm/lib/IR/DataLayout.cpp (+30-29)
- (modified) llvm/lib/IR/Module.cpp (+1-1)
- (modified) llvm/unittests/Analysis/ValueLatticeTest.cpp (+1-1)
- (modified) llvm/unittests/CodeGen/LowLevelTypeTest.cpp (+2-3)
- (modified) llvm/unittests/IR/VectorTypesTest.cpp (+2-2)
``````````diff
diff --git a/llvm/include/llvm/IR/DataLayout.h b/llvm/include/llvm/IR/DataLayout.h
index 2b79facf1d8988..d73fe7ac300843 100644
--- a/llvm/include/llvm/IR/DataLayout.h
+++ b/llvm/include/llvm/IR/DataLayout.h
@@ -65,9 +65,6 @@ enum AlignTypeEnum {
/// Layout alignment element.
///
/// Stores the alignment data associated with a given type bit width.
-///
-/// \note The unusual order of elements in the structure attempts to reduce
-/// padding and make the structure slightly more cache friendly.
struct LayoutAlignElem {
uint32_t TypeBitWidth;
Align ABIAlign;
@@ -82,14 +79,11 @@ struct LayoutAlignElem {
/// Layout pointer alignment element.
///
/// Stores the alignment data associated with a given pointer and address space.
-///
-/// \note The unusual order of elements in the structure attempts to reduce
-/// padding and make the structure slightly more cache friendly.
struct PointerAlignElem {
+ uint32_t AddressSpace;
+ uint32_t TypeBitWidth;
Align ABIAlign;
Align PrefAlign;
- uint32_t TypeBitWidth;
- uint32_t AddressSpace;
uint32_t IndexBitWidth;
/// Initializer
@@ -115,16 +109,16 @@ class DataLayout {
MultipleOfFunctionAlign,
};
private:
- /// Defaults to false.
- bool BigEndian;
+ bool BigEndian = false;
- unsigned AllocaAddrSpace;
- unsigned ProgramAddrSpace;
- unsigned DefaultGlobalsAddrSpace;
+ unsigned AllocaAddrSpace = 0;
+ unsigned ProgramAddrSpace = 0;
+ unsigned DefaultGlobalsAddrSpace = 0;
MaybeAlign StackNaturalAlign;
MaybeAlign FunctionPtrAlign;
- FunctionPtrAlignType TheFunctionPtrAlignType;
+ FunctionPtrAlignType TheFunctionPtrAlignType =
+ FunctionPtrAlignType::Independent;
enum ManglingModeT {
MM_None,
@@ -136,24 +130,30 @@ class DataLayout {
MM_Mips,
MM_XCOFF
};
- ManglingModeT ManglingMode;
+ ManglingModeT ManglingMode = MM_None;
// FIXME: `unsigned char` truncates the value parsed by `parseSpecifier`.
SmallVector<unsigned char, 8> LegalIntWidths;
- /// Primitive type alignment data. This is sorted by type and bit
- /// width during construction.
- using AlignmentsTy = SmallVector<LayoutAlignElem, 4>;
- AlignmentsTy IntAlignments;
- AlignmentsTy FloatAlignments;
- AlignmentsTy VectorAlignments;
+ // Default primitive type specifications.
+ static const LayoutAlignElem DefaultIntSpecs[];
+ static const LayoutAlignElem DefaultFloatSpecs[];
+ static const LayoutAlignElem DefaultVectorSpecs[];
+
+ // Default pointer type specifications.
+ static const PointerAlignElem DefaultPointerSpecs[];
+
+ // Primitive type specifications. Sorted and uniqued by type bit width.
+ SmallVector<LayoutAlignElem, 6> IntAlignments;
+ SmallVector<LayoutAlignElem, 4> FloatAlignments;
+ SmallVector<LayoutAlignElem, 10> VectorAlignments;
+
+ // Pointer type specifications. Sorted and uniqued by address space number.
+ SmallVector<PointerAlignElem, 8> Pointers;
/// The string representation used to create this DataLayout
std::string StringRepresentation;
- using PointersTy = SmallVector<PointerAlignElem, 8>;
- PointersTy Pointers;
-
const PointerAlignElem &getPointerAlignElem(uint32_t AddressSpace) const;
// Struct type ABI and preferred alignments. The default spec is "a:8:64".
@@ -189,6 +189,9 @@ class DataLayout {
Error parseSpecifier(StringRef Desc);
public:
+ /// Constructs a DataLayout with default values.
+ DataLayout();
+
/// Constructs a DataLayout from a specification string.
/// WARNING: Aborts execution if the string is malformed. Use parse() instead.
explicit DataLayout(StringRef LayoutString);
diff --git a/llvm/lib/IR/DataLayout.cpp b/llvm/lib/IR/DataLayout.cpp
index c10b302870edbe..7ac91810255b2b 100644
--- a/llvm/lib/IR/DataLayout.cpp
+++ b/llvm/lib/IR/DataLayout.cpp
@@ -198,37 +198,38 @@ const char *DataLayout::getManglingComponent(const Triple &T) {
return "-m:e";
}
-static const std::pair<AlignTypeEnum, LayoutAlignElem> DefaultAlignments[] = {
- {INTEGER_ALIGN, {1, Align(1), Align(1)}}, // i1
- {INTEGER_ALIGN, {8, Align(1), Align(1)}}, // i8
- {INTEGER_ALIGN, {16, Align(2), Align(2)}}, // i16
- {INTEGER_ALIGN, {32, Align(4), Align(4)}}, // i32
- {INTEGER_ALIGN, {64, Align(4), Align(8)}}, // i64
- {FLOAT_ALIGN, {16, Align(2), Align(2)}}, // half, bfloat
- {FLOAT_ALIGN, {32, Align(4), Align(4)}}, // float
- {FLOAT_ALIGN, {64, Align(8), Align(8)}}, // double
- {FLOAT_ALIGN, {128, Align(16), Align(16)}}, // ppcf128, quad, ...
- {VECTOR_ALIGN, {64, Align(8), Align(8)}}, // v2i32, v1i64, ...
- {VECTOR_ALIGN, {128, Align(16), Align(16)}}, // v16i8, v8i16, v4i32, ...
+// Default primitive type specifications.
+// NOTE: These arrays must be sorted by type bit width.
+constexpr LayoutAlignElem DataLayout::DefaultIntSpecs[] = {
+ {1, Align::Constant<1>(), Align::Constant<1>()}, // i1:8:8
+ {8, Align::Constant<1>(), Align::Constant<1>()}, // i8:8:8
+ {16, Align::Constant<2>(), Align::Constant<2>()}, // i16:16:16
+ {32, Align::Constant<4>(), Align::Constant<4>()}, // i32:32:32
+ {64, Align::Constant<4>(), Align::Constant<8>()}, // i64:32:64
+};
+constexpr LayoutAlignElem DataLayout::DefaultFloatSpecs[] = {
+ {16, Align::Constant<2>(), Align::Constant<2>()}, // f16:16:16
+ {32, Align::Constant<4>(), Align::Constant<4>()}, // f32:32:32
+ {64, Align::Constant<8>(), Align::Constant<8>()}, // f64:64:64
+ {128, Align::Constant<16>(), Align::Constant<16>()}, // f128:128:128
+};
+constexpr LayoutAlignElem DataLayout::DefaultVectorSpecs[] = {
+ {64, Align::Constant<8>(), Align::Constant<8>()}, // v64:64:64
+ {128, Align::Constant<16>(), Align::Constant<16>()}, // v128:128:128
};
-DataLayout::DataLayout(StringRef LayoutString) {
- BigEndian = false;
- AllocaAddrSpace = 0;
- ProgramAddrSpace = 0;
- DefaultGlobalsAddrSpace = 0;
- TheFunctionPtrAlignType = FunctionPtrAlignType::Independent;
- ManglingMode = MM_None;
-
- // Default alignments
- for (const auto &[Kind, Layout] : DefaultAlignments) {
- if (Error Err = setAlignment(Kind, Layout.ABIAlign, Layout.PrefAlign,
- Layout.TypeBitWidth))
- report_fatal_error(std::move(Err));
- }
- if (Error Err = setPointerAlignmentInBits(0, Align(8), Align(8), 64, 64))
- report_fatal_error(std::move(Err));
+// Default pointer type specifications.
+constexpr PointerAlignElem DataLayout::DefaultPointerSpecs[] = {
+ {0, 64, Align::Constant<8>(), Align::Constant<8>(), 64} // p0:64:64:64:64
+};
+
+DataLayout::DataLayout()
+ : IntAlignments(ArrayRef(DefaultIntSpecs)),
+ FloatAlignments(ArrayRef(DefaultFloatSpecs)),
+ VectorAlignments(ArrayRef(DefaultVectorSpecs)),
+ Pointers(ArrayRef(DefaultPointerSpecs)) {}
+DataLayout::DataLayout(StringRef LayoutString) : DataLayout() {
if (Error Err = parseSpecifier(LayoutString))
report_fatal_error(std::move(Err));
}
@@ -277,7 +278,7 @@ bool DataLayout::operator==(const DataLayout &Other) const {
}
Expected<DataLayout> DataLayout::parse(StringRef LayoutDescription) {
- DataLayout Layout("");
+ DataLayout Layout;
if (Error Err = Layout.parseSpecifier(LayoutDescription))
return std::move(Err);
return Layout;
diff --git a/llvm/lib/IR/Module.cpp b/llvm/lib/IR/Module.cpp
index 7ba5b2784f5460..704bc8d339bc57 100644
--- a/llvm/lib/IR/Module.cpp
+++ b/llvm/lib/IR/Module.cpp
@@ -73,7 +73,7 @@ template class llvm::SymbolTableListTraits<GlobalIFunc>;
Module::Module(StringRef MID, LLVMContext &C)
: Context(C), ValSymTab(std::make_unique<ValueSymbolTable>(-1)),
- ModuleID(std::string(MID)), SourceFileName(std::string(MID)), DL(""),
+ ModuleID(std::string(MID)), SourceFileName(std::string(MID)),
IsNewDbgInfoFormat(UseNewDbgInfoFormat) {
Context.addModule(this);
}
diff --git a/llvm/unittests/Analysis/ValueLatticeTest.cpp b/llvm/unittests/Analysis/ValueLatticeTest.cpp
index b456f286e0d965..1567bce2092986 100644
--- a/llvm/unittests/Analysis/ValueLatticeTest.cpp
+++ b/llvm/unittests/Analysis/ValueLatticeTest.cpp
@@ -22,7 +22,7 @@ namespace {
class ValueLatticeTest : public testing::Test {
protected:
LLVMContext Context;
- DataLayout DL = DataLayout("");
+ DataLayout DL;
};
TEST_F(ValueLatticeTest, ValueLatticeGetters) {
diff --git a/llvm/unittests/CodeGen/LowLevelTypeTest.cpp b/llvm/unittests/CodeGen/LowLevelTypeTest.cpp
index b60d82b529fa3f..43aa4009897eeb 100644
--- a/llvm/unittests/CodeGen/LowLevelTypeTest.cpp
+++ b/llvm/unittests/CodeGen/LowLevelTypeTest.cpp
@@ -20,7 +20,6 @@ namespace {
TEST(LowLevelTypeTest, Token) {
LLVMContext C;
- DataLayout DL("");
const LLT TTy = LLT::token();
@@ -38,7 +37,7 @@ TEST(LowLevelTypeTest, Token) {
TEST(LowLevelTypeTest, Scalar) {
LLVMContext C;
- DataLayout DL("");
+ DataLayout DL;
for (unsigned S : {0U, 1U, 17U, 32U, 64U, 0xfffffU}) {
const LLT Ty = LLT::scalar(S);
@@ -70,7 +69,7 @@ TEST(LowLevelTypeTest, Scalar) {
TEST(LowLevelTypeTest, Vector) {
LLVMContext C;
- DataLayout DL("");
+ DataLayout DL;
for (unsigned S : {0U, 1U, 17U, 32U, 64U, 0xfffU}) {
for (auto EC :
diff --git a/llvm/unittests/IR/VectorTypesTest.cpp b/llvm/unittests/IR/VectorTypesTest.cpp
index 7ba143eeeeb81d..c592f809f7bf3e 100644
--- a/llvm/unittests/IR/VectorTypesTest.cpp
+++ b/llvm/unittests/IR/VectorTypesTest.cpp
@@ -276,7 +276,7 @@ TEST(VectorTypesTest, BaseVectorType) {
TEST(VectorTypesTest, FixedLenComparisons) {
LLVMContext Ctx;
- DataLayout DL("");
+ DataLayout DL;
Type *Int32Ty = Type::getInt32Ty(Ctx);
Type *Int64Ty = Type::getInt64Ty(Ctx);
@@ -322,7 +322,7 @@ TEST(VectorTypesTest, FixedLenComparisons) {
TEST(VectorTypesTest, ScalableComparisons) {
LLVMContext Ctx;
- DataLayout DL("");
+ DataLayout DL;
Type *Int32Ty = Type::getInt32Ty(Ctx);
Type *Int64Ty = Type::getInt64Ty(Ctx);
``````````
</details>
https://github.com/llvm/llvm-project/pull/103712
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