I udpated the powerpc changes in the GCC 4.7 summary:
--- htdocs/gcc-4.7/changes.html.~1~ 2011-12-30 18:43:34.885278709 -0500
+++ htdocs/gcc-4.7/changes.html 2011-12-30 18:55:33.455278920 -0500
@@ -576,19 +576,32 @@ well.</p></li>
<h3>PowerPC/PowerPC64</h3>
<ul>
<li>Vectors of type <i>vector long long</i> or <i>vector long</i> are
- passed and returned in the same method as other vectors with the VSX
- instruction set. Previously the GCC compiler did not adhere to the ABI
- for 128-bit vectors with 64-bit integer base types (PR 48857).
- This will also be fixed in the GCC 4.6.1 and 4.5.4 releases.</li>
-
- <li>A new option (<code>-mno-r11)</code> was added to allow AIX
- 32-bit/64-bit and GNU/Linux 64-bit PowerPC users to specify that
- the compiler should not load up the chain register
- (<code>r11</code>) before calling a
- function through a pointer. If you use this option, you cannot call
- nested functions through a pointer, or call other languages that might
- use the static chain.
- </li>
+ passed and returned in the same method as other vectors with the VSX
+ instruction set. Previously the GCC compiler did not adhere to the ABI
+ for 128-bit vectors with 64-bit integer base types (PR 48857).
+ This will also be fixed in the GCC 4.6.1 and 4.5.4 releases.</li>
+
+ <li>A new option (<code>-mno-pointers-to-nested-functions)</code> was
+ added to allow AIX 32-bit/64-bit and GNU/Linux 64-bit PowerPC users to
+ specify that the compiler should not load up the chain register
+ (<code>r11</code>) before calling a function through a pointer.
+ If you use this option, you cannot call nested functions through a
+ pointer, or call other languages that might use the static chain.</li>
+
+ <li>A new option (<code>msave-toc-indirect</code> was added to allow AIX
+ 32-bit/64-bit and GNU/Linux 64-bit PowerPC users control whether we
+ save the TOC in the prologue for indirect calls or generate the save
+ inline. This can speed up some programs that call through a function
+ pointer a lot, but it can slow down other functions that only call
+ through a function pointer in exceptional cases.</li>
+
+ <li>The powerpc will now enable machine specific builtin functions when
+ the user switches the target machine using the
+ <code>#pragma GCC target</code> or <code>GCC target attribute</code>
+ code sequences. In additon, the target macros are updated.
+ However, due to the way the <code>-save-temps</code> switch is
+ implemented, you won't see the effect of these additional macros
+ being defined in preprocessor output.</li>
</ul>
<h3>SPARC</h3>
--
Michael Meissner, IBM
5 Technology Place Drive, M/S 2757, Westford, MA 01886-3141, USA
meiss...@linux.vnet.ibm.com fax +1 (978) 399-6899
