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[docs] Prevent O0 optnone for opt input

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If we just compile with -O0, clang will add optnone attributes
everywhere, so opt won't actually be able to perform any passes.
Instruct clang to not emit the optnone so opt can do its thing.

Differential Revision: https://reviews.llvm.org/D56950

llvm-svn: 352550
This commit is contained in:
Shoaib Meenai 2019-01-29 22:17:51 +00:00
parent 478ae74dcd
commit e4bff2064d
1 changed files with 2 additions and 2 deletions
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4
docs/HowToSubmitABug.rst
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@ -84,8 +84,8 @@ Compile-time optimization bugs
------------------------------
If you find that a bug crashes in the optimizer, compile your test-case to a
``.bc`` file by passing "``-emit-llvm -O0 -c -o foo.bc``".
Then run:
``.bc`` file by passing "``-emit-llvm -O1 -Xclang -disable-llvm-passes -c -o
foo.bc``". Then run:
.. code-block:: bash