[llvm-commits] [llvm] r58230 - in /llvm/trunk: include/llvm/Target/TargetInstrInfo.h lib/CodeGen/PreAllocSplitting.cpp lib/Target/X86/X86InstrInfo.cpp lib/Target/X86/X86InstrInfo.h lib/Target/X86/X86RegisterInfo.h test/CodeGen/X86/pre-split7.ll

[Chris Lattner]

On Oct 27, 2008, at 12:14 AM, Evan Cheng wrote:

> Author: evancheng
> Date: Mon Oct 27 02:14:50 2008
> New Revision: 58230
>
> URL: http://llvm.org/viewvc/llvm-project?rev=58230&view=rev
> Log:
> For now, don't split live intervals around x87 stack register  
> barriers. FpGET_ST0_80 must be right after a call instruction (and  
> ADJCALLSTACKUP) so we need to find a way to prevent reload of x87  
> registers between them.

Eww... This seems exactly like the "copy instruction that clobbers  
flags" problem,

-Chris