[llvm-commits] [llvm] r122343 - /llvm/trunk/lib/Transforms/Utils/SimplifyInstructions.cpp

[Duncan Sands]

Hi Chris,

>> Visit instructions deterministically.  Use a FIFO so as to approximately
>> visit instructions before their uses, since InstructionSimplify does a
>> better job in that case.  All this prompted by Frits van Bommel.
>
> Ok.  If you're going to delay deleting instructions, it might be worthwhile to drop their operands so that "dead" instructions don't cause hasOneUse() checks to fail.

since InstructionSimplify doesn't pay any attention to uses (it doesn't need
to since it only returns existing instructions) this doesn't matter.

Ciao, Duncan.