Changes in directory llvm-www:
OpenProjects.html updated: 1.30 -> 1.31
---
Log message:
Two new codegen improvements.
---
Diffs of the changes: (+10 -3)
OpenProjects.html | 13 ++++++++++---
1 files changed, 10 insertions(+), 3 deletions(-)
Index: llvm-www/OpenProjects.html
diff -u llvm-www/OpenProjects.html:1.30 llvm-www/OpenProjects.html:1.31
--- llvm-www/OpenProjects.html:1.30 Fri Nov 16 11:16:15 2007
+++ llvm-www/OpenProjects.html Tue Nov 27 15:10:27 2007
@@ -339,10 +339,17 @@
<div class="www_text">
<ol>
-<li>Improve the instruction selectors.</li>
+<li>Rename ISD::BIT_CONVERT to ISD::BITCAST to match the llvm ir concept</li>
+<li>Change the VECTOR_SHUFFLE to be variadic. Right now, a VECTOR_SHUFFLE
+ takes three operands: two vectors and a shuffle mask. The shuffle mask is
+ required to be a BUILD_VECTOR node of N indices. It would be much better
+ (for several reasons) to eliminate the BUILD_VECTOR and make VECTOR_SHUFFLE
+ take 2+N operands instead.</li>
<li>Implement a way to describe calling conventions abstractly, instead of
us having to write C++ code in the lowering phase. Many approaches are
- available, a good one is <a
href="http://www.eecs.harvard.edu/nr/pubs/staged-abstract.html";>Staged
Allocation: A Compositional Technique for Specifying and Implementing Procedure
Calling Conventions</a>.</li>
+ available, a good one is <a
href="http://www.eecs.harvard.edu/nr/pubs/staged-abstract.html";>Staged
Allocation: A Compositional Technique for Specifying and Implementing Procedure
Calling Conventions</a>. This is already
+ well underway and used by some targets (see
+ lib/Target/X86/X86CallingConv.td) but isn't adopted for all targets.</li>
<li>Implement interprocedural register allocation. The CallGraphSCCPass can be
used to implement a bottom-up analysis that will determine the *actual*
registers clobbered by a function. Use the pass to fine tune register
usage
@@ -400,7 +407,7 @@
src="http://www.w3.org/Icons/valid-html401"; alt="Valid HTML 4.01!"></a>
<a href="http://llvm.org";>LLVM Compiler Infrastructure</a><br>
- Last modified: $Date: 2007/11/16 17:16:15 $
+ Last modified: $Date: 2007/11/27 21:10:27 $
</address>
<!--#include virtual="footer.incl" -->
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