Move ABIInfo/ABIArgInfo classes into ABIInfo.h
llvm-svn: 63586
This commit is contained in:
Daniel Dunbar
parent
17450acc3b
commit
6d6b0d309a
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//===----- ABIInfo.h - ABI information access & encapsulation ---*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef CLANG_CODEGEN_ABIINFO_H
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#define CLANG_CODEGEN_ABIINFO_H
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namespace clang {
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/* FIXME: All of this stuff should be part of the target interface
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somehow. It is currently here because it is not clear how to factor
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the targets to support this, since the Targets currently live in a
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layer below types n'stuff.
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*/
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/// ABIArgInfo - Helper class to encapsulate information about how a
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/// specific C type should be passed to or returned from a function.
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class ABIArgInfo {
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public:
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enum Kind {
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Default,
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StructRet, /// Only valid for return values. The return value
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/// should be passed through a pointer to a caller
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/// allocated location passed as an implicit first
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/// argument to the function.
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Ignore, /// Ignore the argument (treat as void). Useful for
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/// void and empty structs.
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Coerce, /// Only valid for aggregate return types, the argument
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/// should be accessed by coercion to a provided type.
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ByVal, /// Only valid for aggregate argument types. The
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/// structure should be passed "byval" with the
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/// specified alignment (0 indicates default
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/// alignment).
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Expand, /// Only valid for aggregate argument types. The
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/// structure should be expanded into consecutive
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/// arguments for its constituent fields. Currently
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/// expand is only allowed on structures whose fields
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/// are all scalar types or are themselves expandable
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/// types.
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KindFirst=Default, KindLast=Expand
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};
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private:
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Kind TheKind;
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const llvm::Type *TypeData;
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unsigned UIntData;
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ABIArgInfo(Kind K, const llvm::Type *TD=0,
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unsigned UI=0) : TheKind(K),
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TypeData(TD),
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UIntData(0) {}
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public:
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static ABIArgInfo getDefault() {
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return ABIArgInfo(Default);
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}
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static ABIArgInfo getStructRet() {
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return ABIArgInfo(StructRet);
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}
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static ABIArgInfo getIgnore() {
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return ABIArgInfo(Ignore);
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}
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static ABIArgInfo getCoerce(const llvm::Type *T) {
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return ABIArgInfo(Coerce, T);
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}
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static ABIArgInfo getByVal(unsigned Alignment) {
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return ABIArgInfo(ByVal, 0, Alignment);
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}
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static ABIArgInfo getExpand() {
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return ABIArgInfo(Expand);
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}
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Kind getKind() const { return TheKind; }
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bool isDefault() const { return TheKind == Default; }
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bool isStructRet() const { return TheKind == StructRet; }
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bool isIgnore() const { return TheKind == Ignore; }
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bool isCoerce() const { return TheKind == Coerce; }
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bool isByVal() const { return TheKind == ByVal; }
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bool isExpand() const { return TheKind == Expand; }
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// Coerce accessors
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const llvm::Type *getCoerceToType() const {
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assert(TheKind == Coerce && "Invalid kind!");
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return TypeData;
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}
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// ByVal accessors
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unsigned getByValAlignment() const {
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assert(TheKind == ByVal && "Invalid kind!");
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return UIntData;
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}
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};
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/// ABIInfo - Target specific hooks for defining how a type should be
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/// passed or returned from functions.
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class ABIInfo {
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public:
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virtual ~ABIInfo();
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virtual ABIArgInfo classifyReturnType(QualType RetTy,
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ASTContext &Context) const = 0;
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virtual ABIArgInfo classifyArgumentType(QualType Ty,
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ASTContext &Context) const = 0;
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};
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} // end namespace clang
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#endif
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@ -24,6 +24,9 @@
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#include "llvm/Attributes.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Target/TargetData.h"
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#include "ABIInfo.h"
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using namespace clang;
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using namespace CodeGen;
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@ -118,109 +121,6 @@ CGFunctionInfo::arg_iterator CGFunctionInfo::arg_end() const {
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/***/
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/// ABIArgInfo - Helper class to encapsulate information about how a
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/// specific C type should be passed to or returned from a function.
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class ABIArgInfo {
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public:
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enum Kind {
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Default,
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StructRet, /// Only valid for return values. The return value
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/// should be passed through a pointer to a caller
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/// allocated location passed as an implicit first
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/// argument to the function.
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Ignore, /// Ignore the argument (treat as void). Useful for
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/// void and empty structs.
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Coerce, /// Only valid for aggregate return types, the argument
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/// should be accessed by coercion to a provided type.
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ByVal, /// Only valid for aggregate argument types. The
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/// structure should be passed "byval" with the
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/// specified alignment (0 indicates default
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/// alignment).
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Expand, /// Only valid for aggregate argument types. The
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/// structure should be expanded into consecutive
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/// arguments for its constituent fields. Currently
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/// expand is only allowed on structures whose fields
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/// are all scalar types or are themselves expandable
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/// types.
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KindFirst=Default, KindLast=Expand
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};
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private:
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Kind TheKind;
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const llvm::Type *TypeData;
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unsigned UIntData;
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ABIArgInfo(Kind K, const llvm::Type *TD=0,
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unsigned UI=0) : TheKind(K),
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TypeData(TD),
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UIntData(0) {}
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public:
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static ABIArgInfo getDefault() {
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return ABIArgInfo(Default);
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}
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static ABIArgInfo getStructRet() {
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return ABIArgInfo(StructRet);
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}
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static ABIArgInfo getIgnore() {
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return ABIArgInfo(Ignore);
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}
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static ABIArgInfo getCoerce(const llvm::Type *T) {
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return ABIArgInfo(Coerce, T);
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}
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static ABIArgInfo getByVal(unsigned Alignment) {
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return ABIArgInfo(ByVal, 0, Alignment);
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}
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static ABIArgInfo getExpand() {
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return ABIArgInfo(Expand);
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}
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Kind getKind() const { return TheKind; }
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bool isDefault() const { return TheKind == Default; }
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bool isStructRet() const { return TheKind == StructRet; }
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bool isIgnore() const { return TheKind == Ignore; }
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bool isCoerce() const { return TheKind == Coerce; }
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bool isByVal() const { return TheKind == ByVal; }
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bool isExpand() const { return TheKind == Expand; }
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// Coerce accessors
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const llvm::Type *getCoerceToType() const {
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assert(TheKind == Coerce && "Invalid kind!");
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return TypeData;
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}
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// ByVal accessors
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unsigned getByValAlignment() const {
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assert(TheKind == ByVal && "Invalid kind!");
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return UIntData;
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}
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};
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/***/
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/* FIXME: All of this stuff should be part of the target interface
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somehow. It is currently here because it is not clear how to factor
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the targets to support this, since the Targets currently live in a
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layer below types n'stuff.
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*/
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/// ABIInfo - Target specific hooks for defining how a type should be
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/// passed or returned from functions.
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class clang::ABIInfo {
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public:
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virtual ~ABIInfo();
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virtual ABIArgInfo classifyReturnType(QualType RetTy,
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ASTContext &Context) const = 0;
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virtual ABIArgInfo classifyArgumentType(QualType Ty,
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ASTContext &Context) const = 0;
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};
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ABIInfo::~ABIInfo() {}
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/// isEmptyStruct - Return true iff a structure has no non-empty
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