x86_64 code generation defects when SSE instructions are disabled

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#1

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.

#2

Aaron,

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

Thanks,
Nadav