[llvm-commits] Patch for X86 to use subregs
evan.cheng at apple.com
Sat Jul 28 01:48:17 PDT 2007
Very cool! I need to read it more carefully. But I see you are
lowering zext to a single insert_subreg. Is that right? It won't zero
out the top part, no?
Sent from my iPhone
On Jul 28, 2007, at 12:17 AM, Christopher Lamb <christopher.lamb at gmail.com
> This patch changes the X86 back end to use the new subreg operations
> for appropriate truncate and extend operations. This should allow
> regression testing of the subreg feature going forward, as it's now
> used in a public target.
> The patch passed DejaGnu and all of SingleSource on my x86 machine,
> but there are changes for x86-64 as well which I haven't been able
> to test. Output assembly for x86-64 appears sane, but I'd appreciate
> someone giving the patch a try on their x86-64 system. Other 32-bit
> x86 testing is also appreciated.
> Christopher Lamb
> llvm-commits mailing list
> llvm-commits at cs.uiuc.edu
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