[LLVMdev] add Inline assembly in LLVM IR

[Duncan Sands]

Hi Jian-Ru Chen, if you run llc on your bitcode with -march=cpp then it should
output the series of API calls needed to produce that bitcode.

Ciao, Duncan.

On 07/06/13 12:18, Jian-Ru Chen wrote:
> Hi all,
> I'm working for translating dex bytecode to LLVM IR
> In order to communicate with Android interpreter,
> The work have to add data below some instructions
>
> I want to use inline assembly to add data.
> Thus, I wrote a little program to find out the related LLVM IR
>
> int main()
> {
>      asm(".long 0x12345678");
>      return 0;
> }
>
> and I use clang to translate it into bitcode
> It's the result...
>
> ; ModuleID = 'hello.c'
> target datalayout =
> "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
> target triple = "x86_64-unknown-linux-gnu"
>
> define i32 @main() nounwind uwtable {
> entry:
>    %retval = alloca i32, align 4
>    store i32 0, i32* %retval
>    call void asm sideeffect ".long 0x12345678", "~{dirflag},~{fpsr},~{flags}"()
> nounwind, !srcloc !0
>    ret i32 0
> }
>
> !0 = metadata !{i32 20}
>
> --
> And I want to know which LLVM API should I use to generate "  call void asm
> sideeffect ".long 0x12345678", "~{dirflag},~{fpsr},~{flags}"() nounwind, !srcloc
> !0" ?
>
> Thanks!!
>
>
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