SystemZ.cpp File Reference

#include "CGBuiltin.h"
#include "CodeGenFunction.h"
#include "clang/Basic/TargetBuiltins.h"
#include "llvm/IR/IntrinsicsS390.h"

Go to the source code of this file.

Macros
#define	INTRINSIC_WITH_CC(NAME)

Functions
static Value *	EmitSystemZIntrinsicWithCC (CodeGenFunction &CGF, unsigned IntrinsicID, const CallExpr *E)
	Handle a SystemZ function in which the final argument is a pointer to an int that receives the post-instruction CC value.
static Value *	EmitAtomicCmpXchgForZOSIntrin (CodeGenFunction &CGF, const CallExpr *E, llvm::Type *IntType, bool HasAddr)
	For z/OS, the builtin __cs1 has the following signature: int __cs1(void * Comparand, void * Destination, void * Exchange); Whereas the llvm 'cmpxchg' instruction has the following syntax: compxchg *Destination, Comparand, Exchange.

Macro Definition Documentation

INTRINSIC_WITH_CC

#define INTRINSIC_WITH_CC

(

NAME

)

Value:

    case SystemZ::BI__builtin_##NAME: \
      return EmitSystemZIntrinsicWithCC(*this, Intrinsic::NAME, E)

Referenced by clang::CodeGen::CodeGenFunction::EmitSystemZBuiltinExpr().

Function Documentation

EmitAtomicCmpXchgForZOSIntrin()

Value * EmitAtomicCmpXchgForZOSIntrin ( CodeGenFunction & CGF, const CallExpr * E, llvm::Type * IntType, bool HasAddr )

static

For z/OS, the builtin __cs1 has the following signature: int __cs1(void * Comparand, void * Destination, void * Exchange); Whereas the llvm 'cmpxchg' instruction has the following syntax: compxchg *Destination, Comparand, Exchange.

So we need to swap Comparand & Destination and dereference Comparand & Exchange when invoking CreateAtomicCmpXchg. For this reason we can not use the utility function MakeAtomicCmpXchgValue.

Definition at line 49 of file SystemZ.cpp.

References clang::CodeGen::CodeGenFunction::Builder, clang::CodeGen::CodeGenFunction::ConvertType(), clang::CodeGen::CGBuilderTy::CreateAtomicCmpXchg(), clang::CodeGen::CGBuilderTy::CreateLoad(), clang::CodeGen::CGBuilderTy::CreateStore(), clang::CodeGen::CodeGenFunction::EmitScalarExpr(), clang::CallExpr::getArg(), clang::CodeGen::CodeGenFunction::getContext(), clang::Expr::getType(), and clang::ASTContext::toCharUnitsFromBits().

Referenced by clang::CodeGen::CodeGenFunction::EmitSystemZBuiltinExpr().

EmitSystemZIntrinsicWithCC()

Value * EmitSystemZIntrinsicWithCC ( CodeGenFunction & CGF, unsigned IntrinsicID, const CallExpr * E )

static

Handle a SystemZ function in which the final argument is a pointer to an int that receives the post-instruction CC value.

At the LLVM level this is represented as a function that returns a {result, cc} pair.

Definition at line 25 of file SystemZ.cpp.

References clang::CodeGen::CodeGenFunction::Builder, clang::Call, clang::CodeGen::CodeGenFunction::CGM, clang::CodeGen::CGBuilderTy::CreateStore(), clang::CodeGen::CodeGenFunction::EmitPointerWithAlignment(), clang::CodeGen::CodeGenFunction::EmitScalarExpr(), clang::CallExpr::getArg(), clang::CodeGen::CodeGenModule::getIntrinsic(), and clang::CallExpr::getNumArgs().