[LLVMdev] LLVM ERROR: Cannot select

[Duncan Sands]

Hi ZY,

On 11/05/13 20:37, Zhiyuan Ren wrote:
> Duncan,
>
> Thanks for getting back to me. I am not sure how to find the original bitcode
> (and related Ada source code) that causes the truncate. This is the error
> message that gcc gave me when I tried to compile an Ada source file using
> dragonegg plugin (gcc -c -fplugin...).

use -S instead of -c and add -flto
The resulting .s file contains the bitcode.  Please send in the file.

Ciao, Duncan.

>
> ZY
>
> ps, sorry for multiple emails, trying to find out how to reply to a thread in
> the mailing list
>
>
> On Sat, May 11, 2013 at 12:42 PM, Duncan Sands <baldrick at free.fr
> <mailto:baldrick at free.fr>> wrote:
>
>     Hi ZY,
>
>
>     On 10/05/13 22:34, Zhiyuan Ren wrote:
>
>         Hello, I am new to LLVM and doing some experiment with 3.2 on Ada code. Can
>         anyone help me on the following error message?
>
>
>     a truncate from an i32 to an f32 is not valid.  This caused the code generator
>     to abort.  What is the original bitcode that caused this?
>
>     Ciao, Duncan.
>
>
>         Thanks,
>         ZY
>
>
>         LLVM ERROR: Cannot select: 0xa7a0bf0: f32 = truncate 0xa7a5ea8 [ID=24]
>             0xa7a5ea8: i32 = X86ISD::SHLD 0xa790280, 0xa790390, 0xa76e088 [ID=22]
>               0xa790280: i32,ch = load 0xa7386a0, 0xa7a68d8, 0xa7a5628<LD1[%1482+4],
>         anyext from i8> [ID=19]
>                 0xa7a68d8: i32 = add 0xa7a6040, 0xa7a11c8 [ID=15]
>                   0xa7a6040: i32,ch = CopyFromReg 0xa7386a0, 0xa790c98 [ORD=741]
>         [ID=12]
>                     0xa790c98: i32 = Register %vreg7 [ORD=741] [ID=3]
>                   0xa7a11c8: i32 = Constant<13> [ID=7]
>                 0xa7a5628: i32 = undef [ORD=737] [ID=2]
>               0xa790390: i32,ch = load 0xa7386a0, 0xa7a57c0,
>         0xa7a5628<LD4[%1482](align=1)> [ID=20]
>                 0xa7a57c0: i32 = add 0xa7a6040, 0xa7a5f30 [ID=16]
>                   0xa7a6040: i32,ch = CopyFromReg 0xa7386a0, 0xa790c98 [ORD=741]
>         [ID=12]
>                     0xa790c98: i32 = Register %vreg7 [ORD=741] [ID=3]
>                   0xa7a5f30: i32 = Constant<9> [ID=5]
>                 0xa7a5628: i32 = undef [ORD=737] [ID=2]
>               0xa76e088: i8 = Constant<31> [ID=6]
>
>
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