On 7 Mar 2023, at 11:26, Mark Millard <mark...@yahoo.com> wrote: > > Below is a small example C source showing the clang 15+ armv7 > problem that leads to the unbounded looping in later code in > the lang/gcc12+ builds: a data structure is mis-initialized, > breaking its invariant properties used by the later code > structure. ... > In the output below, note the blocks of 4 "next" > values that do not change. Each should match the > earlier hexadecimal value on the same line: point > back to same element of the array. 3 of 4 do not. > > # cc -g -O2 partition.c > # ./a.out > 0: 0x40a84 : next?: 0x40a84 > 1: 0x40a90 : next?: 0x40a84 > 2: 0x40a9c : next?: 0x40a84 > 3: 0x40aa8 : next?: 0x40a84
Very strange, I don't see this at all here. All the values are always correct, at every optimization level. I tried clang 13, clang 14, clang 15 from base and clang 15 from ports. However, my architecture is amd64, so maybe you are running into a armv7 specific issue? -Dimitry
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