[LLVMdev] AsmPrinter question

[Bill Wendling]

Hi Sachin,

The declaration of functions called via the "call" instruction is a  
GlobalValue in your Module. You can go through all of the  
GlobalValues, look for those that are Function declarations (use the  
"Function::isDeclaration()" method), and then placing them in the  
appropriate place in your assembly file.

Would that work?

-bw

On Jan 28, 2009, at 12:23 AM, <Sachin.Punyani at microchip.com> <Sachin.Punyani at microchip.com 
 > wrote:

> Hi,
>
> Probably I did not mention my question correctly.
>
> I need to emit declarations of the libcalls (that are made in the  
> current module) at the beginning of the assembly file. The class  
> “Module” does not maintain any list of the libcalls made during the  
> program. Although, it maintains lists of all the global variables  
> and functions in the current module.
>
> Traversing each instruction and its operand to find if any libcall  
> has been invoked seems to be very very costly.  Is there some other  
> way to find the libcalls that are made in module?
>
> Regards
> Sachin
>
> From: llvmdev-bounces at cs.uiuc.edu [mailto:llvmdev- 
> bounces at cs.uiuc.edu] On Behalf Of Evan Cheng
> See MachineOperand.h. If a MachineOperand represents an external  
> symbol, getSymbolName() returns a string.
>
> Evan
>
> On Jan 27, 2009, at 8:26 PM, Sachin.Punyani at microchip.com wrote:
> Hi All,
>
> I need to print some extra information about libcall names in  
> assembly.  Libcall names are managed as ExternalSymbols in LLVM.
>
> How do I access these ExternalSymbols from Asmprinter?
>
> AsmPrinter uses class Module that lists all the global variables  
> (including extern variables) and functions (include extern  
> functions). But it does not list any information about the libcalls  
> (ExternalSymbols) generated during lowering.
>
> Regards
> Sachin
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