[llvm-commits] [llvm] r125105 - /llvm/trunk/lib/Target/X86/X86ISelLowering.cpp
David A. Greene
greened at obbligato.org
Mon Feb 21 12:27:30 CST 2011
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.
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