[llvm-commits] [llvm] r125105 - /llvm/trunk/lib/Target/X86/X86ISelLowering.cpp

[David A. Greene]

Chris Lattner <clattner at apple.com> writes:

>> The use case is when trying to isolate misuse of 256-bit registers.  A
>> typical situation involves shuffles as the code to generate a 256-bit
>> shuffle is more complex than the code for a 128-bit shuffle.  In codes
>> with many shuffles, a switch like this makes it easier to identify the
>> offending shuffle.
>
> Please do.  Bugpoint is more general and pretty good at this sort of thing,

I will remove it.  The problem with Bugpoint is that it doesn't know how
to switch among subtargets, so if you're trying to debug a codegen
issue, it's often a manual process.

                          -Dave