llvm dev - Dec 2010 - [LLVMdev] LLVM dllimport

?Hi all,
        Can someone tell me how to import functions from shared libraries and
use them in LLVM assembly
Regards,
Dylan Borg
+356 99214902
borgdylan at hotmail.com
borgdylang at gmail.com
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Hi Dylan,

If you have "import libraries", you may call them with general calling
conversions.

Without import libraries, for example;

declare dllimport i32 @foo(i32)
@quux = dllimport global i32

define i32 @bar() nounwind {
  %a = load i32* @quux
  %r = call i32 @foo(i32 %a)
  ret i32 %r
}

        .globl  _bar
_bar:
        subl    $4, %esp
        movl    __imp__quux, %eax
        movl    (%eax), %eax
        movl    %eax, (%esp)
        calll   *__imp__foo
        addl    $4, %esp
        ret

If you have clang or llvm-gcc, you can confirm outputs with
clang foo.c -S -emit-llvm -o foo.ll
clang foo.c -S -o foo.s


...Takumi

Doh!

2010/12/27 NAKAMURA Takumi <geek4civic at
gmail.com>:
> If you have "import libraries", you may call them with general
calling
> conversions.
>
> Without import libraries, for example;
You will need import libraries!

If you use GNU ld, you may refer to *.dll directly, w/o import
libraries nor deffiles.
Then ld will generate stubs.

...Takumi