llvm dev - Nov 2013 - [LLVMdev] x86_64 code generation defects when SSE instructions are disabled

Hi all,

Recently, I discovered a defect in GCC's code generation for x86_64 targets
when SSE is disabled. Upon testing with LLVM 3.2, I found that it also has
the same issues so I'm linking a GCC bug report I made. The proposed
solution for the second issue listed there also applies to LLVM:
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59277

As I noted in the bug report, I'm not sure how a fix should be
handled/whether it should be handled simply because I believe such fixes
would not necessarily adhere to the ABI specification.

In any case, I just wanted to throw the issue this way.

--
Aaron Myles Landwehr
Computer Architecture and Parallel Systems Laboratory (CAPSL)
University Of Delaware
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Aaron, 

Do you know if this is still a problem for recent versions of LLVM ?

Thanks,
Nadav

On Nov 24, 2013, at 12:56 PM, Aaron Myles Landwehr <snaphat at gmail.com>
wrote:
> Hi all,
> 
> Recently, I discovered a defect in GCC's code generation for x86_64
targets when SSE is disabled. Upon testing with LLVM 3.2, I found that it also
has the same issues so I'm linking a GCC bug report I made. The proposed
solution for the second issue listed there also applies to LLVM:
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59277
> 
> As I noted in the bug report, I'm not sure how a fix should be
handled/whether it should be handled simply because I believe such fixes would
not necessarily adhere to the ABI specification.
> 
> In any case, I just wanted to throw the issue this way.
> 
> --
> Aaron Myles Landwehr
> Computer Architecture and Parallel Systems Laboratory (CAPSL)
> University Of Delaware
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
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