Specifies a change in a variable's debug value history.
Declared in <llvm/CodeGen/DbgEntityHistoryCalculator.h>
class Entry;There exist two types of entries:
* Debug value entry:
A new debug value becomes live. If the entry's EndIndex is NoEntry, the value is valid until the end of the function. For other values, the index points to the entry in the entry vector that ends this debug value. The ending entry can either be an overlapping debug value, or an instruction that clobbers the value.
* Clobbering entry:
This entry's instruction clobbers one or more preceding register-described debug values that have their end index set to this entry's position in the entry vector.
| Name | Description |
|---|---|
EntryKind | Kind of history entry: a new debug value or a register clobber. |
| Name | Description |
|---|---|
Entry [constructor] | Create a history entry for Instr of the given Kind. |
endEntry | Mark this debug value as ending at entry EndIndex. |
getEndIndex | Return the index of the entry that ends this debug value, or NoEntry. |
getEntryKind | Return whether this entry is a debug value or a clobber. |
getInstr | Return the instruction associated with this entry. |
isClobber | Return true if this entry is a clobbering instruction. |
isClosed | Return true if this debug value has been closed by an end index. |
isDbgValue | Return true if this entry is a debug value. |
| Name | Description |
|---|---|
llvm::DbgValueHistoryMap | For each user variable, keep a list of instruction ranges where this variable is accessible. The variables are listed in order of appearance. |