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Mirror of https://github.com/RPCS3/llvm-mirror
0b8acbe1f0
This patch implements DBG_VALUE_LIST handling to the LiveDebugValues pass. This is a substantial change, and makes a few fundamental changes to the existing logic. We still use the basic model of a VarLocMap that is indexed by a LocIndex, with a VarLocSet (a CoalescingBitVector underneath) giving us efficient lookups of existing variable locations for a given location type. The main change is that the VarLocMap may contain a given VarLoc multiple times (once for each unique location operand), so that a VarLoc can be looked up from any of the registers that it uses. This means that each VarLoc has multiple corresponding LocIndexes; to allow us to iterate through the set of VarLocs (previously we would iterate through the VarLocSet), we now also maintain a single entry in the VarLocMap that contains every VarLoc exactly once. The VarLoc class itself is also changed; this change is much simpler, refactoring out location-specific members into a MachineLocation class and adding a vector of these locations. Differential Revision: https://reviews.llvm.org/D83890 |
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