Evan Cheng 49d4c0bd18 - Add TargetInstrInfo::getOperandLatency() to compute operand latencies. This ...

allow target to correctly compute latency for cases where static scheduling
  itineraries isn't sufficient. e.g. variable_ops instructions such as
  ARM::ldm.
  This also allows target without scheduling itineraries to compute operand
  latencies. e.g. X86 can return (approximated) latencies for high latency
  instructions such as division.
- Compute operand latencies for those defined by load multiple instructions,
  e.g. ldm and those used by store multiple instructions, e.g. stm.

llvm-svn: 115755

2010-10-06 06:27:31 +00:00

5.1 KiB

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