[gcc/devel/rust/master] Merge #1391

[gcc/devel/rust/master] Merge #1391

[Thomas Schwinge]

https://gcc.gnu.org/g:e4cdb24c468b8a848980f7138767fbe093471c5b

commit e4cdb24c468b8a848980f7138767fbe093471c5b
Merge: fd2bd659e44 9c7a580aa13
Author: bors[bot] <26634292+bors[bot]@users.noreply.github.com>
Date:   Sun Jul 17 19:52:16 2022 +0000

    Merge #1391
    
    1391: Fix ICE on duplicate compilation of ExternBlock items r=philberty a=philberty
    
    When we declare an extern block after where it is used the query
    compilation system in the backend code-gen pass will resolve this and
    compile as required. But when the iteration of the crate as part of the
    pipeline we end up compiling this function again. The check we used to stop
    this was copy paste from the other function items but in this case the
    check for function_completed is not valid as this is a prototype for an
    extern item so we dont add this to the translation unit as an fndecl which
    meant we hit the ICE where we compile and add it again.
    
    Fixes #1323
    
    
    Co-authored-by: Philip Herron <philip.herron@embecosm.com>

Diff:

 gcc/rust/backend/rust-compile-extern.h     | 20 ++++++++++++--------
 gcc/testsuite/rust/compile/issue-1323-1.rs | 18 ++++++++++++++++++
 gcc/testsuite/rust/compile/issue-1323-2.rs | 16 ++++++++++++++++
 3 files changed, 46 insertions(+), 8 deletions(-)