Re: [PATCH] PR67401: Fix wrong code generated by expand_atomic_compare_and_swap

[Bernd Schmidt]

On 09/11/2015 01:21 AM, John David Anglin wrote:
As noted in the PR, expand_atomic_compare_and_swap can generate wrong code when 
libcalls are emitted
for the sync_compare_and_swap and the result comparison test.  This is fixed by 
emitting a move insn to copy
the result rtx of the sync_compare_and_swap libcall to target_oval instead of 
directly assigning it.
Could you provide relevant parts of the rtl dumps or (preferrably) the 
patch you are using to enable the libcall?


Bernd