[Bug target/115631] [15 Regression] GCN: [-PASS:-]{+FAIL:+} c-c++-common/torture/builtin-arith-overflow-6.c -O2 execution test

[ams at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115631

--- Comment #1 from Andrew Stubbs <ams at gcc dot gnu.org> ---
It was writing 0 to s12 (scalar register) and then moving the zero to lane zero
of v0 (vector register).

Now it's writing the 0 directly to v0, of which all but lane zero is masked.

These should be identical (unless s12 was also live).

The problem must be elsewhere.