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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

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@352550 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Shoaib Meenai 2019-01-29 22:17:51 +00:00
parent 90aa0dc6e7
commit 728963ac49
1 changed files with 2 additions and 2 deletions
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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