llvm dev - Jul 2015 - [LLVMdev] splice and undefined physical reg

Hi,

i have got some troubles while trying to instrumentate a indirect call
instruction.
Basically, every time i run into a CALL64r i would like to have this
situation:
                 ------
                | .... |
                | CMP  |
                | JE   |
                 ------
                  |  |
                ---  -----
                |        |
                ----    ----
               |EXIT|  |CALL|
                ----   |....|
                        ----
So i do a splice, fix up successors and predecessors, but since the call
implicitly uses some register the compilation fails with a lot of this:

  *** Bad machine code: Using an undefined physical register ***
- function:    parse_and_dump_tv_tag
- basic block: BB#126 (null) (0x6127658)
- instruction: CALL64r %vreg41, <regmask>, %RSP<imp-use>,
%EDI<imp-use>,
%RSI<imp-use>, %RDX<imp-use>, %RCX<imp-use>,
%R8<imp-use>, %R9D<imp-use>,
%AL<imp-use>, %RSP<imp-def>, %EAX<imp-def>; GR64:%vreg41

How can i get rid of this errors?

Thank you very much,

-- Jon
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.llvm.org/pipermail/llvm-dev/attachments/20150728/a1293bf3/attachment.html>

Alex already answered your question.

Q.
> On Jul 28, 2015, at 1:46 AM, Johnny Bory <johnny.bory.12 at
gmail.com> wrote:
> 
> Hi,
> 
> i have got some troubles while trying to instrumentate a indirect call
instruction.
> Basically, every time i run into a CALL64r i would like to have this
situation:
>                  ------
>                 | .... |
>                 | CMP  |
>                 | JE   |
>                  ------
>                   |  |
>                 ---  -----
>                 |        |
>                 ----    ---- 
>                |EXIT|  |CALL|
>                 ----   |....|
>                         ----
> So i do a splice, fix up successors and predecessors, but since the call
implicitly uses some register the compilation fails with a lot of this:
> 
>   *** Bad machine code: Using an undefined physical register ***
> - function:    parse_and_dump_tv_tag
> - basic block: BB#126 (null) (0x6127658)
> - instruction: CALL64r %vreg41, <regmask>, %RSP<imp-use>,
%EDI<imp-use>, %RSI<imp-use>, %RDX<imp-use>,
%RCX<imp-use>, %R8<imp-use>, %R9D<imp-use>,
%AL<imp-use>, %RSP<imp-def>, %EAX<imp-def>; GR64:%vreg41
> 
> How can i get rid of this errors?
> 
> Thank you very much,
> 
> -- Jon
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.llvm.org/pipermail/llvm-dev/attachments/20150728/91f0608d/attachment.html>