[Bug target/77686] [6/7 Regression] wrong code on arm-linux-gnueabi and arm-linux-gnueabihf

[ktkachov at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77686

--- Comment #6 from ktkachov at gcc dot gnu.org ---
(In reply to Richard Biener from comment #5)
> This can only uncover another pre-existing issue as it is a 100% obvious
> fix.  I do not have a good way to run anything on arm so please help me spot
> the wrong-code in the assembler output.
> 
> TBAA issues are also often exposed by scheduling so please try
> -fno-schedule-insns[2] or -fstrict-aliasing with -O1.
> 

You're right. -fno-schedule-insns2 makes the testcase pass at -O2

> -Updating SSA information for statement MEM[(struct function *)&D.43856 +
> 4B] = __f$__dummy_a;
> +Updating SSA information for statement MEM[(struct __lambda0 *)&D.43856] = 
> 
> this might also very well be a C++ FE issue.