TH tests fail in ext-interp way when ghc-stage2 is built using LLVM

This is a continuation of #15274 (closed).

Currently the testsuite fails with around 40 test failures, all in th/ in the ext-interp way when building GHC with BUILD_FLAVOUR=perf-llvm:

Unexpected results from:
TEST="ClosedFam1TH T10620 T10828 T11721_TH T11797 T12478_1 T12646 T13642 T14060 T15502 T15738 T15792 T15845 T1835 T3920 T4135 T4188 T5037 T5362 T7477 T8761 T8884 T8953 T9262 T9692 T9738 TH_RichKinds TH_RichKinds2 TH_Roles3 TH_TyInstWhere2 TH_implicitParams TH_reifyDecl1 TH_reifyExplicitForAllFams TH_reifyInstances TH_reifyMkName TH_repE2 TH_repGuard TH_repPrim TH_repPrim2 TH_repUnboxedTuples"

SUMMARY for test run started at Sun Dec 23 06:01:39 2018 UTC
 0:10:09 spent to go through
    6745 total tests, which gave rise to
   26266 test cases, of which
   19055 were skipped

      42 had missing libraries
    7040 expected passes
      89 expected failures

       0 caused framework failures
       0 caused framework warnings
       0 unexpected passes
      40 unexpected failures
       0 unexpected stat failures

Unexpected failures:
   th/TH_repE2.run                    TH_repE2 [exit code non-0] (ext-interp)
   th/TH_repPrim.run                  TH_repPrim [exit code non-0] (ext-interp)
   th/TH_repPrim2.run                 TH_repPrim2 [exit code non-0] (ext-interp)
   th/TH_repUnboxedTuples.run         TH_repUnboxedTuples [exit code non-0] (ext-interp)
   th/TH_repGuard.run                 TH_repGuard [exit code non-0] (ext-interp)
   th/TH_reifyDecl1.run               TH_reifyDecl1 [exit code non-0] (ext-interp)
   th/TH_reifyMkName.run              TH_reifyMkName [exit code non-0] (ext-interp)
   th/TH_reifyInstances.run           TH_reifyInstances [exit code non-0] (ext-interp)
   th/TH_reifyExplicitForAllFams.run  TH_reifyExplicitForAllFams [exit code non-0] (ext-interp)
   th/T3920.run                       T3920 [exit code non-0] (ext-interp)
   th/T4188.run                       T4188 [exit code non-0] (ext-interp)
   th/T1835.run                       T1835 [exit code non-0] (ext-interp)
   th/T5037.run                       T5037 [exit code non-0] (ext-interp)
   th/T5362.run                       T5362 [exit code non-0] (ext-interp)
   th/TH_RichKinds.run                TH_RichKinds [exit code non-0] (ext-interp)
   th/TH_RichKinds2.run               TH_RichKinds2 [exit code non-0] (ext-interp)
   th/T4135.run                       T4135 [exit code non-0] (ext-interp)
   th/TH_TyInstWhere2.run             TH_TyInstWhere2 [exit code non-0] (ext-interp)
   th/ClosedFam1TH.run                ClosedFam1TH [exit code non-0] (ext-interp)
   th/TH_Roles3.run                   TH_Roles3 [exit code non-0] (ext-interp)
   th/T7477.run                       T7477 [exit code non-0] (ext-interp)
   th/T8884.run                       T8884 [exit code non-0] (ext-interp)
   th/T9262.run                       T9262 [exit code non-0] (ext-interp)
   th/T9692.run                       T9692 [exit code non-0] (ext-interp)
   th/T8953.run                       T8953 [exit code non-0] (ext-interp)
   th/T9738.run                       T9738 [exit code non-0] (ext-interp)
   th/T10620.run                      T10620 [exit code non-0] (ext-interp)
   th/T10828.run                      T10828 [exit code non-0] (ext-interp)
   th/T11721_TH.run                   T11721_TH [exit code non-0] (ext-interp)
   th/T11797.run                      T11797 [exit code non-0] (ext-interp)
   th/T8761.run                       T8761 [exit code non-0] (ext-interp)
   th/T12478_1.run                    T12478_1 [exit code non-0] (ext-interp)
   th/T12646.run                      T12646 [exit code non-0] (ext-interp)
   th/T13642.run                      T13642 [exit code non-0] (ext-interp)
   th/T14060.run                      T14060 [exit code non-0] (ext-interp)
   th/T15502.run                      T15502 [exit code non-0] (ext-interp)
   th/TH_implicitParams.run           TH_implicitParams [exit code non-0] (ext-interp)
   th/T15738.run                      T15738 [exit code non-0] (ext-interp)
   th/T15792.run                      T15792 [exit code non-0] (ext-interp)
   th/T15845.run                      T15845 [exit code non-0] (ext-interp)

Trac metadata

Trac field	Value
Version	8.6.3
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler (LLVM)
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system
Architecture