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authorChris Lattner <sabre@nondot.org>2005-05-15 06:09:55 +0000
committerChris Lattner <sabre@nondot.org>2005-05-15 06:09:55 +0000
commit1b592f0bdf57ca1d1ed0e4a0c9291372fc75f964 (patch)
tree5a5f5ed9a8d75f5b8c10ec4adc00cdf78e96242c /docs/ReleaseNotes.html
parenta4faa4aecc17e360e064df32db11d455c47c844d (diff)
downloadexternal_llvm-1b592f0bdf57ca1d1ed0e4a0c9291372fc75f964.zip
external_llvm-1b592f0bdf57ca1d1ed0e4a0c9291372fc75f964.tar.gz
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edits to the simplify-libcalls element, move it higher in the list.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22052 91177308-0d34-0410-b5e6-96231b3b80d8
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@@ -222,6 +222,12 @@ multiple of 8 bytes in size.
<li>The -globalopt pass now promotes non-address-taken static globals that are
only accessed in main to SSA registers.</li>
+<li>The new -simplify-libcalls pass improves code generated for well-known
+library calls. The pass optimizes calls to many of the string, memory, and
+standard I/O functions (e.g. replace the calls with simpler/faster calls) when
+possible, given information known statically about the arguments to the call.
+</li>
+
<li>Loops with trip counts based on array pointer comparisons (e.g. "<tt>for (i
= 0; &amp;A[i] != &amp;A[100]; ++i) ...</tt>") are optimized better than before,
which primarily helps iterator-intensive C++ codes.</li>
@@ -229,12 +235,6 @@ which primarily helps iterator-intensive C++ codes.</li>
<li>The code generator now uses information about takes advantage of commutative
two-address instructions when performing register allocation.</li>
-<li>A new pass has been added to gccas to simplify well-known library calls. The
-pass will short circuit calls to many of the string, memory, and printf type
-functions or replace the calls with simpler/faster calls, where possible given
-information known statically about the arguments to the call. To use the
-pass, specify <tt>-simplify-libcalls</tt> to the <tt>opt</tt> tool.</li>
-
</ol>
</div>