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Add function attribute 'optnone'.

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This function attribute indicates that the function is not optimized
by any optimization or code generator passes with the 
exception of interprocedural optimization passes.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189101 91177308-0d34-0410-b5e6-96231b3b80d8
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Andrea Di Biagio
2013-08-23 11:53:55 +00:00
parent a550b51bac
commit 5768bb8d77
16 changed files with 72 additions and 7 deletions
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11
docs/LangRef.rst
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@@ -879,6 +879,17 @@ example:
This function attribute indicates that the function never returns
with an unwind or exceptional control flow. If the function does
unwind, its runtime behavior is undefined.
``optnone``
This function attribute indicates that the function is not optimized
by any optimization or code generator passes with the
exception of interprocedural optimization passes.
This attribute cannot be used together with the ``alwaysinline``
attribute; this attribute is also incompatible
with the ``minsize`` attribute and the ``optsize`` attribute.
The inliner should never inline this function in any situation.
Only functions with the ``alwaysinline`` attribute are valid
candidates for inlining inside the body of this function.
``optsize``
This attribute suggests that optimization passes and code generator
passes make choices that keep the code size of this function low,