[Bug target/112088] New: [14 Regression] GCN target testing broken by "amdgcn: add -march=gfx1030 EXPERIMENTAL"

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112088

            Bug ID: 112088
           Summary: [14 Regression] GCN target testing broken by "amdgcn:
                    add -march=gfx1030 EXPERIMENTAL"
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Severity: major
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: tschwinge at gcc dot gnu.org
                CC: ams at gcc dot gnu.org, jules at gcc dot gnu.org
  Target Milestone: ---
            Target: GCN

Assuming that I did my bisecting correctly, it's the recent commit
r14-4787-gc7ec7bd1c6590cf4eed267feab490288e0b8d691 "amdgcn: add -march=gfx1030
EXPERIMENTAL" that completely distorts GCN target testing: execution test FAILs
all over the place due to 'gcn-run' failing with:

    Possible kernel exit value corruption, 2 most significant bytes aren't
0xffff, 0xcafe, or 0: 0x9d4c0038

(The last value different each time.)

I've tested '-march=gfx90a' and '-march=fiji'.