diff options
| author | Dimitry Andric <dim@FreeBSD.org> | 2013-04-08 18:41:23 +0000 | 
|---|---|---|
| committer | Dimitry Andric <dim@FreeBSD.org> | 2013-04-08 18:41:23 +0000 | 
| commit | 4a16efa3e43e35f0cc9efe3a67f620f0017c3d36 (patch) | |
| tree | 06099edc18d30894081a822b756f117cbe0b8207 /docs/LinkTimeOptimization.rst | |
| parent | 482e7bddf617ae804dc47133cb07eb4aa81e45de (diff) | |
Diffstat (limited to 'docs/LinkTimeOptimization.rst')
| -rw-r--r-- | docs/LinkTimeOptimization.rst | 9 | 
1 files changed, 4 insertions, 5 deletions
| diff --git a/docs/LinkTimeOptimization.rst b/docs/LinkTimeOptimization.rst index 7eacf0bd0d01..c15abd325ed0 100644 --- a/docs/LinkTimeOptimization.rst +++ b/docs/LinkTimeOptimization.rst @@ -1,5 +1,3 @@ -.. _lto: -  ======================================================  LLVM Link Time Optimization: Design and Implementation  ====================================================== @@ -85,9 +83,10 @@ invokes system linker.      return foo1();    } -.. code-block:: bash +To compile, run: + +.. code-block:: console -  --- command lines ---    % clang -emit-llvm -c a.c -o a.o   # <-- a.o is LLVM bitcode file    % clang -c main.c -o main.o        # <-- main.o is native object file    % clang a.o main.o -o main         # <-- standard link command without modifications @@ -96,7 +95,7 @@ invokes system linker.    visible symbol defined in LLVM bitcode file. The linker completes its usual    symbol resolution pass and finds that ``foo2()`` is not used    anywhere. This information is used by the LLVM optimizer and it -  removes ``foo2()``.</li> +  removes ``foo2()``.  * As soon as ``foo2()`` is removed, the optimizer recognizes that condition ``i    < 0`` is always false, which means ``foo3()`` is never used. Hence, the | 
