llvm_asm macro has been deprecated #10

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1. dylanmckay commented on Oct 29, 2020

   

   dylanmckay

   on Oct 29, 2020

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   Hey there,

   I notice that the llvm_asm! macro has been semi deprecated, but it still should be working.

   It works for me with current master at 2b14a08 and up-to-date nightly compiler version:

   rustc 1.49.0-nightly (07e968b64 2020-10-27)
   cargo 1.49.0-nightly (dd83ae55c 2020-10-20)
   

   I notice in rust-lang/rust#70173 that some time ago people temporarily started getting errors saying that llvm_asm! is gone, but that seems to be an old temporary rust nightly issue.

   I can compile the crate fine on my machine.

   Re. updating to the new asm! macro:

   The Rust toolchain needs currently not-implemented target-specific support for enabling the asm! macro on AVR:

   error[E0472]: asm! is unsupported on this target
     --> src/lib.rs:36:13
      |
   36 |             asm!("nop");
      |             ^
   

   What version of nightly are you using/does upgrading fix the problem?
2. ArthurFleischman commented on Jan 31, 2021

   

   ArthurFleischman

   on Jan 31, 2021

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   any improvements?
3. dylanmckay commented on Feb 1, 2021

   

   dylanmckay

   on Feb 1, 2021

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   The llvm_asm macro should still work. I added an example in d9eff38 and it compiles on my machine fine. I vaguely remember that a temporary llvm_asm macro regression caused it to stop working around this time. The asm macro is still not supported by AVR.
4. andrewshadura commented on Feb 25, 2021

   

   andrewshadura

   on Feb 25, 2021

   Last edited by andrewshadura

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   I’m getting an error with the latest nightly with both 0.3.1 and 0.3.2:

   error: couldn't allocate input reg for constraint 'w'
     --> .../avr_delay-0.3.2/src/lib.rs:34:17
      |
   34 |         unsafe {llvm_asm!("1: sbiw $0,1
      |                 ^
   
   error: couldn't allocate input reg for constraint 'w'
     --> .../avr_delay-0.3.2/src/lib.rs:41:13
      |
   41 |     unsafe {llvm_asm!("1: sbiw $0,1
      |             ^
   
   

   👍React with 👍1Reacted by Laura Demkowicz-Duffy
5. benstockil commented on Jul 5, 2021

   

   benstockil

   on Jul 5, 2021

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   Yeah, I'm getting the same issue as @andrewshadura. Is there a way around this error?
6. polawat commented on Aug 29, 2021

   

   polawat

   on Aug 29, 2021

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   I got a similar issue and got it to work bychanging the nightly version to nightly-2021-01-07

   rustup override set nightly-2021-01-07

   👍React with 👍1Reacted by Bradley Gannon

   👎React with 👎5Reacted by Laura Demkowicz-Duffy, XenoN, Petko Pavlovski, zag2art and Nikita Dyomin

   👀React with 👀1Reacted by Nikita Dyomin
7. zag2art commented on Jan 31, 2022

   

   zag2art

   on Jan 31, 2022

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   rust-lang/rust#92816
   Any improvements according to this?
8. stappersg

   changed the title [-]Doesn't work![/-] [+]llvm_asm macro has been deprecated[/+] on Jan 31, 2022
9. stappersg commented on Jan 31, 2022

   

   stappersg

   on Jan 31, 2022

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   Any improvements according to this?

   Rahix/avr-device#91
10. stappersg commented on May 21, 2022

    

    stappersg

    on May 21, 2022

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    #18 has been merged, now dealing with #19 ...

    ❤️React with ❤️2Reacted by David Hamill and zag2art
11. stappersg commented on Jun 8, 2022

    

    stappersg

    on Jun 8, 2022

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    This not an issue any more.
12. stappersg

    closed this as completedon Jun 8, 2022