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clang: lib/CodeGen/CGStmt.cpp File Reference

#include "CGDebugInfo.h"
#include "CGOpenMPRuntime.h"
#include "CodeGenFunction.h"
#include "CodeGenModule.h"
#include "TargetInfo.h"
#include "clang/AST/Attr.h"
#include "clang/AST/Expr.h"
#include "clang/AST/Stmt.h"
#include "clang/AST/StmtVisitor.h"
#include "clang/Basic/Builtins.h"
#include "clang/Basic/DiagnosticSema.h"
#include "clang/Basic/PrettyStackTrace.h"
#include "clang/Basic/SourceManager.h"
#include "clang/Basic/TargetInfo.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/SmallSet.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/IR/Assumptions.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/InlineAsm.h"
#include "llvm/IR/Intrinsics.h"
#include "llvm/IR/MDBuilder.h"
#include "llvm/Support/SaveAndRestore.h"
#include <optional>
#include "clang/AST/StmtNodes.inc"

Go to the source code of this file.

namespace   llvm   Diagnostic wrappers for TextAPI types for error reporting.
  template<typename LoopStmt > static bool  hasEmptyLoopBody (const LoopStmt &S)   static bool  isSwiftAsyncCallee (const CallExpr *CE)   Determine if the given call uses the swiftasync calling convention.
  static CSFC_Result  CollectStatementsForCase (const Stmt *S, const SwitchCase *Case, bool &FoundCase, SmallVectorImpl< const Stmt * > &ResultStmts)   static bool  FindCaseStatementsForValue (const SwitchStmt &S, const llvm::APSInt &ConstantCondValue, SmallVectorImpl< const Stmt * > &ResultStmts, ASTContext &C, const SwitchCase *&ResultCase)   FindCaseStatementsForValue - Find the case statement being jumped to and then invoke CollectStatementsForCase to find the list of statements to emit for a switch on constant.
  static std::optional< SmallVector< uint64_t, 16 > >  getLikelihoodWeights (ArrayRef< Stmt::Likelihood > Likelihoods)   static std::string  SimplifyConstraint (const char *Constraint, const TargetInfo &Target, SmallVectorImpl< TargetInfo::ConstraintInfo > *OutCons=nullptr)   static std::string  AddVariableConstraints (const std::string &Constraint, const Expr &AsmExpr, const TargetInfo &Target, CodeGenModule &CGM, const AsmStmt &Stmt, const bool EarlyClobber, std::string *GCCReg=nullptr)   AddVariableConstraints - Look at AsmExpr and if it is a variable declared as using a particular register add that as a constraint that will be used in this asm stmt.
  static llvm::MDNode *  getAsmSrcLocInfo (const StringLiteral *Str, CodeGenFunction &CGF)   getAsmSrcLocInfo - Return the !srcloc metadata node to attach to an inline asm call instruction.
  static void  UpdateAsmCallInst (llvm::CallBase &Result, bool HasSideEffect, bool HasUnwindClobber, bool ReadOnly, bool ReadNone, bool NoMerge, bool NoConvergent, const AsmStmt &S, const std::vector< llvm::Type * > &ResultRegTypes, const std::vector< llvm::Type * > &ArgElemTypes, CodeGenFunction &CGF, std::vector< llvm::Value * > &RegResults)   static void  EmitAsmStores (CodeGenFunction &CGF, const AsmStmt &S, const llvm::ArrayRef< llvm::Value * > RegResults, const llvm::ArrayRef< llvm::Type * > ResultRegTypes, const llvm::ArrayRef< llvm::Type * > ResultTruncRegTypes, const llvm::ArrayRef< LValue > ResultRegDests, const llvm::ArrayRef< QualType > ResultRegQualTys, const llvm::BitVector &ResultTypeRequiresCast, const llvm::BitVector &ResultRegIsFlagReg)   static void  EmitHipStdParUnsupportedAsm (CodeGenFunction *CGF, const AsmStmt &S)   static llvm::ConvergenceControlInst *  getConvergenceToken (llvm::BasicBlock *BB)   ◆ ABSTRACT_STMT #define ABSTRACT_STMT (   Op ) ◆ EXPR ◆ STMT ◆ CSFC_Result

CollectStatementsForCase - Given the body of a 'switch' statement and a constant value that is being switched on, see if we can dead code eliminate the body of the switch to a simple series of statements to emit.

Basically, on a switch (5) we want to find these statements: case 5: printf(...); <– ++i; <– break;

and add them to the ResultStmts vector. If it is unsafe to do this transformation (for example, one of the elided statements contains a label that might be jumped to), return CSFC_Failure. If we handled it and 'S' should include statements after it (e.g. the printf() line is a substmt of the case) then return CSFC_FallThrough. If we handled it and found a break statement, then return CSFC_Success.

If Case is non-null, then we are looking for the specified case, checking that nothing we jump over contains labels. If Case is null, then we found the case and are looking for the break.

If the recursive walk actually finds our Case, then we set FoundCase to true.

Enumerator CSFC_Failure  CSFC_FallThrough  CSFC_Success 

Definition at line 1926 of file CGStmt.cpp.

◆ AddVariableConstraints() static std::string AddVariableConstraints ( const std::string &  Constraint, const Expr &  AsmExpr, const TargetInfo &  Target, CodeGenModule &  CGM, const AsmStmt &  Stmt, const bool  EarlyClobber, std::string *  GCCReg = nullptr  ) static ◆ CollectStatementsForCase() ◆ EmitAsmStores()

Definition at line 2595 of file CGStmt.cpp.

References clang::CodeGen::CodeGenFunction::Builder, clang::CodeGen::CodeGenFunction::CGM, clang::CodeGen::CGBuilderTy::CreateStore(), clang::CodeGen::CodeGenFunction::EmitStoreThroughLValue(), clang::CodeGen::RValue::get(), clang::CodeGen::LValue::getAddress(), clang::CodeGen::CodeGenFunction::getContext(), clang::CodeGen::CodeGenModule::getDataLayout(), clang::CodeGen::CodeGenModule::getDiags(), clang::Expr::getExprLoc(), clang::CodeGen::CodeGenModule::getIntrinsic(), clang::ASTContext::getIntTypeForBitwidth(), clang::CodeGen::CodeGenFunction::getLLVMContext(), clang::CodeGen::CodeGenFunction::getTargetHooks(), clang::ASTContext::getTypeSize(), clang::QualType::isNull(), clang::CodeGen::TargetCodeGenInfo::isScalarizableAsmOperand(), clang::CodeGen::CodeGenFunction::MakeAddrLValue(), clang::DiagnosticsEngine::Report(), and clang::CodeGen::Address::withElementType().

◆ EmitHipStdParUnsupportedAsm() ◆ FindCaseStatementsForValue() ◆ getAsmSrcLocInfo()

getAsmSrcLocInfo - Return the !srcloc metadata node to attach to an inline asm call instruction.

The !srcloc MDNode contains a list of constant integers which are the source locations of the start of each line in the asm.

Definition at line 2506 of file CGStmt.cpp.

References clang::CodeGen::CodeGenFunction::CGM, clang::StringLiteral::getBeginLoc(), clang::CodeGen::CodeGenModule::getContext(), clang::CodeGen::CodeGenModule::getLangOpts(), clang::CodeGen::CodeGenFunction::getLLVMContext(), clang::StringLiteral::getLocationOfByte(), clang::SourceLocation::getRawEncoding(), clang::ASTContext::getSourceManager(), clang::StringLiteral::getString(), clang::CodeGen::CodeGenFunction::getTarget(), clang::CodeGen::CodeGenTypeCache::Int64Ty, and SM.

Referenced by UpdateAsmCallInst().

◆ getConvergenceToken() static llvm::ConvergenceControlInst * getConvergenceToken ( llvm::BasicBlock *  BB ) static

Definition at line 3282 of file CGStmt.cpp.

◆ getLikelihoodWeights() ◆ hasEmptyLoopBody()

template<typename LoopStmt >

static bool hasEmptyLoopBody ( const LoopStmt &  S ) static

Definition at line 1040 of file CGStmt.cpp.

◆ isSwiftAsyncCallee() ◆ SimplifyConstraint() ◆ UpdateAsmCallInst() static void UpdateAsmCallInst ( llvm::CallBase &  Result, bool  HasSideEffect, bool  HasUnwindClobber, bool  ReadOnly, bool  ReadNone, bool  NoMerge, bool  NoConvergent, const AsmStmt &  S, const std::vector< llvm::Type * > &  ResultRegTypes, const std::vector< llvm::Type * > &  ArgElemTypes, CodeGenFunction &  CGF, std::vector< llvm::Value * > &  RegResults  ) static

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