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| author | Ben Gamari <ben@smart-cactus.org> | 2016-01-27 12:24:48 +0100 |
|---|---|---|
| committer | Ben Gamari <ben@smart-cactus.org> | 2016-01-27 12:24:48 +0100 |
| commit | 45c6fbc5284f83e1253ff9f3b49fe54a76c20ba7 (patch) | |
| tree | de60126eea9719caa1a9b3b58814fe5062bd5724 /docs | |
| parent | d50609e8f7a9c3a19d9d75c6133e742c9b584732 (diff) | |
| download | haskell-45c6fbc5284f83e1253ff9f3b49fe54a76c20ba7.tar.gz | |
Document -fllvm-fill-undef-with-garbage
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/users_guide/debugging.rst | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/docs/users_guide/debugging.rst b/docs/users_guide/debugging.rst index 80c9f8d3bf..a7bbbb5e0b 100644 --- a/docs/users_guide/debugging.rst +++ b/docs/users_guide/debugging.rst @@ -333,6 +333,12 @@ Checking for consistency Ditto for C-- level. +.. ghc-flag:: -fllvm-fill-undef-with-garbage + + Instructs the LLVM code generator to fill dead STG registers with garbage + instead of ``undef`` in calls. This makes it easier to catch subtle + code generator and runtime system bugs (e.g. see :ghc-ticket:`11487`). + .. _checking-determinism: Checking for determinism |