[clang] 8c6efc0 - [clang][Flang][SystemZ] Enable -mbackchain on Flang (#229863)

[via cfe-commits]

Author: Tulio Magno Quites Machado Filho
Date: 2026-10-08T08:07:24-03:00
New Revision: 8c6efc06653cfb33515d441761a19c1082f0729a

URL: https://github.com/llvm/llvm-project/commit/8c6efc06653cfb33515d441761a19c1082f0729a
DIFF: https://github.com/llvm/llvm-project/commit/8c6efc06653cfb33515d441761a19c1082f0729a.diff

LOG: [clang][Flang][SystemZ] Enable -mbackchain on Flang (#229863)

Enable -mbackchain on Flang now that it supports s390x. This is needed
in order to pass some libomp tests:

  libomp :: tasking/omp_untied_taskloop.f90
  libomp :: transform/fuse/do-looprange.f90
  libomp :: transform/fuse/do.f90
  libomp :: transform/tile/do.F90
  libomp :: transform/tile/do_2d.f90
  libomp :: transform/tile/do_2d_varsizes.f90
  libomp :: transform/unroll/heuristic_do.f90

Added: 
    

Modified: 
    clang/include/clang/Options/Options.td

Removed: 
    


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diff  --git a/clang/include/clang/Options/Options.td b/clang/include/clang/Options/Options.td
index 9c0f91600ce71..88fbd72f4eae5 100644
--- a/clang/include/clang/Options/Options.td
+++ b/clang/include/clang/Options/Options.td
@@ -6298,7 +6298,7 @@ HelpText<"Not emit the visibility attribute for asm in AIX OS or give all symbol
 defm backchain : BoolMOption<"backchain",
   CodeGenOpts<"Backchain">, DefaultFalse,
   PosFlag<SetTrue, [], [ClangOption], "Link stack frames through backchain on System Z">,
-  NegFlag<SetFalse>, BothFlags<[], [ClangOption, CC1Option]>>;
+  NegFlag<SetFalse>, BothFlags<[], [ClangOption, CC1Option, FlangOption]>>;
 
 defm zos_ppa1_name : BoolMOption<"zos-ppa1-name",
   CodeGenOpts<"ZOSPPA1Name">, DefaultTrue,