[LLVMdev] Sparc back end fix

[Raghu Prabhakar]

Hi Tim,

Thanks for the patch. I had a few questions though - just to make sure that I get the problem correctly. Currently, here is your flow, as I understand it :

        x86 llvm-gcc binary        llc -march=sparc       gcc cross/sparc
source ---------------------> .bc ------------------> .s ----------------->  sparc executable.

Is this correct? Or did you manage to build the llvm-gcc source on a sparc machine? 

Also, does your flow work correctly for programs with C++ constructs (take any standard benchmark...e.g. PARSEC's streamcluster.cpp as an example program)? The reason I am asking this is because I partly succeeded in building the llvm-gcc frontend on a SPARC machine..which works fine for C programs. However, programs which involve C++ constructs do not succeed. Although I am yet to figure out the reason, I wanted to know if you ran into similar problems.

Thanks.
Raghu.


----- Original Message -----
From: "Timothy M Jones" <tjones1 at inf.ed.ac.uk>
To: LLVMdev at cs.uiuc.edu
Sent: Monday, November 22, 2010 10:04:57 AM
Subject: [LLVMdev] Sparc back end fix

Hi everyone,

Following my earlier posting  
(http://lists.cs.uiuc.edu/pipermail/llvmdev/2010-November/036292.html), I  
sent another message to the list, but it seems like it didn't get through  
:-(  I managed to fix the problem in my earlier post and compile a  
cross-llvm-gcc.  Then I discovered I was having problems with a setting a  
variable based on a ?: condition.  Anyway, I've managed to track down the  
problem which was due to the conditional move not declaring its implicit  
use of the icc register in the back end.  The following patch fixes this  
problem.  A test case is also provided here too.

Cheers
Tim


-- 
Timothy M. Jones
http://homepages.inf.ed.ac.uk/tjones1
The University of Edinburgh is a charitable body, registered in
Scotland, with registration number SC005336.


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