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Michael Graumann

2009-Jul-31 17:24 UTC

[LLVMdev] Inserting Instructions (pass)

Hi,

I' am trying to insert an InlineAsm Instruction in my pass, which
FunctionType do I need for Inlineasm? 

If I understand it right, I need a call instruction to insert the new
produced InlineAsm? 

 

Thanks for help,

 

Michael

 

for (BasicBlock::iterator bi = i->begin(), be = i->end(); bi != be; ++bi){

std::vector<const Type*> asm_arguments;

                  FunctionType *asm_type = FunctionType::get(Type::VoidTy,
asm_arguments, false);

                  InlineAsm* au = new InlineAsm(asm_type ???,
"isync","~{dirflag},~{fpsr},~{flags}",true);

                  //CallInst* ae = new CallInst(au ??); 

//Works fine

                  AllocaInst* ai = new AllocaInst(Type::Int16Ty);

                  Instruction *pi = bi;

                  pi->getParent()->getInstList().insert(pi, ai);

            }

 

 

Test.ll

call void asm sideeffect "isync",
"~{dirflag},~{fpsr},~{flags}"() nounwind

 

llvm::FunctionType

public:

  /// FunctionType::get - This static method is the primary way of
constructing

  /// a FunctionType. 

  ///

  static FunctionType *get(

    const Type *Result, ///< The result type, isync is Void

    const std::vector<const Type*> &Params, ///< The types of the
parameters
???

    bool isVarArg  ///< Whether this is a variable argument length function,
isync false?

  );

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Chris Lattner

2009-Jul-31 19:49 UTC

head link

[LLVMdev] Inserting Instructions (pass)

On Jul 31, 2009, at 10:24 AM, Michael Graumann wrote:
> Hi,
> I’ am trying to insert an InlineAsm Instruction in my pass, which  
> FunctionType do I need for Inlineasm?
> If I understand it right, I need a call instruction to insert the  
> new produced InlineAsm?
>
> Thanks for help
Inline asm works like a "callee".  So for:

call void asm sideeffect "isync",
"~{dirflag},~{fpsr},~{flags}"()
nounwind

The thing your calling has type "void()*".  You just pass
"void()"
into the InlineAsm ctor.

-Chris
> ,
>
> Michael
>
> for (BasicBlock::iterator bi = i->begin(), be = i->end(); bi != be; +
> +bi){
> std::vector<const Type*> asm_arguments;
>                   FunctionType *asm_type =  
> FunctionType::get(Type::VoidTy, asm_arguments, false);
>                   InlineAsm* au = new InlineAsm(asm_type ???,  
> "isync","~{dirflag},~{fpsr},~{flags}",true);
>                   //CallInst* ae = new CallInst(au ??);
> //Works fine
>                   AllocaInst* ai = new AllocaInst(Type::Int16Ty);
>                   Instruction *pi = bi;
>                   pi->getParent()->getInstList().insert(pi, ai);
>             }
>
>
> Test.ll
> call void asm sideeffect "isync",
"~{dirflag},~{fpsr},~{flags}"()
> nounwind
>
> llvm::FunctionType
> public:
>   /// FunctionType::get - This static method is the primary way of  
> constructing
>   /// a FunctionType.
>   ///
>   static FunctionType *get(
>     const Type *Result, ///< The result type, isync is Void
>     const std::vector<const Type*> &Params, ///< The types of
the
> parameters ???
>     bool isVarArg  ///< Whether this is a variable argument length  
> function, isync false?
>   );
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
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Michael Graumann

2009-Aug-01 00:04 UTC

head link

[LLVMdev] Inserting Instructions (pass)

Thank you Chris,

for your hint, but I am still too stupid. I tried two versions

 

asm_arguments.push_back(Type::VoidTy);

FunctionType *asm_type = FunctionType::get(Type::VoidTy, asm_arguments,
false);

 

Alternatively

 

FunctionType *asm_type = FunctionType::get(Type::VoidTy, std::vector<const
Type*>(), false);

 

. Can you give me a snippet of example code, or somebody else? 

Thanks for help

 

Michael

 

for (BasicBlock::iterator bi = i->begin(), be = i->end(); bi != be; ++bi){

std::vector<const Type*> asm_arguments;

 

asm_arguments.push_back(Type::VoidTy);

 

                  FunctionType *asm_type = FunctionType::get(Type::VoidTy,
asm_arguments, false);

                  InlineAsm* au = new InlineAsm(asm_type ???,
"isync","~{dirflag},~{fpsr},~{flags}",true);

                  //CallInst* ae = new CallInst(au ??);

//Works fine

                  AllocaInst* ai = new AllocaInst(Type::Int16Ty);

                  Instruction *pi = bi;

                  pi->getParent()->getInstList().insert(pi, ai);

            }

 

 

Von: llvmdev-bounces at cs.uiuc.edu [mailto:llvmdev-bounces at cs.uiuc.edu] Im
Auftrag von Chris Lattner
Gesendet: Freitag, 31. Juli 2009 21:50
An: LLVM Developers Mailing List
Betreff: Re: [LLVMdev] Inserting Instructions (pass)

 

 

On Jul 31, 2009, at 10:24 AM, Michael Graumann wrote:





Hi,

I' am trying to insert an InlineAsm Instruction in my pass, which
FunctionType do I need for Inlineasm?

If I understand it right, I need a call instruction to insert the new
produced InlineAsm?

 

Thanks for help

 

Inline asm works like a "callee".  So for:

 

call void asm sideeffect "isync",
"~{dirflag},~{fpsr},~{flags}"() nounwind

 

The thing your calling has type "void()*".  You just pass
"void()" into the
InlineAsm ctor.

 

-Chris





,

 

Michael

 

for (BasicBlock::iterator bi = i->begin(), be = i->end(); bi != be; ++bi){

std::vector<const Type*> asm_arguments;

                  FunctionType *asm_type = FunctionType::get(Type::VoidTy,
asm_arguments, false);

                  InlineAsm* au = new InlineAsm(asm_type ???,
"isync","~{dirflag},~{fpsr},~{flags}",true);

                  //CallInst* ae = new CallInst(au ??);

//Works fine

                  AllocaInst* ai = new AllocaInst(Type::Int16Ty);

                  Instruction *pi = bi;

                  pi->getParent()->getInstList().insert(pi, ai);

            }

 

 

Test.ll

call void asm sideeffect "isync",
"~{dirflag},~{fpsr},~{flags}"() nounwind

 

llvm::FunctionType

public:

  /// FunctionType::get - This static method is the primary way of
constructing

  /// a FunctionType.

  ///

  static FunctionType *get(

    const Type *Result, ///< The result type, isync is Void

    const std::vector<const Type*> &Params, ///< The types of the
parameters
???

    bool isVarArg  ///< Whether this is a variable argument length function,
isync false?

  );

_______________________________________________
LLVM Developers mailing list
LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev

 

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