[LLVMbugs] [Bug 24147] New: test/CodeGen/AMDGPU/infinite-loop-evergreen.ll doesn't terminate on Phase 2 or 3 of release

[bugzilla-daemon at llvm.org]

https://llvm.org/bugs/show_bug.cgi?id=24147

            Bug ID: 24147
           Summary: test/CodeGen/AMDGPU/infinite-loop-evergreen.ll doesn't
                    terminate on Phase 2 or 3 of release
           Product: new-bugs
           Version: 3.7
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: daniel.sanders at imgtec.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

This occurred for Mips but doesn't look Mips specific at first glance.

As per the summary, Phase 1 (gcc) builds work as intended but Phase 2 and 3
(both just-built clangs) builds fail to terminate.

It seems the test is expected to call llvm_unreachable() however
llvm_unreachable() is not guaranteed to terminate the program. One possible
implementation for NDEBUG builds is to hint to the compiler that it can omit
the code path.

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