PHITransAddr - An address value which tracks and handles phi translation. As we walk "up" the CFG through predecessors, we need to ensure that the address we're tracking is kept up to date. For example, if we're analyzing an address of "&A[i]" and walk through the definition of 'i' which is a PHI node, we must phi translate i to get "&A[j]" or else we will analyze an incorrect pointer in the predecessor block.
Declared in <llvm/Analysis/PHITransAddr.h>
class PHITransAddr;This is designed to be a relatively small object that lives on the stack and is copyable.
| Name | Description |
|---|---|
PHITransAddr [constructor] | Constructor |
dump | |
getAddr | |
getSelectCondition | If the address expression depends on a select instruction (possibly through casts or GEPs), return that select's condition. Otherwise return nullptr. This is used to drive translation of both sides of a select-dependent address (see the Cond overload of translateValue). |
isPotentiallyPHITranslatable | isPotentiallyPHITranslatable - If this needs PHI translation, return true if we have some hope of doing it. This should be used as a filter to avoid calling PHITranslateValue in hopeless situations. |
needsPHITranslationFromBlock | needsPHITranslationFromBlock - Return true if moving from the specified BasicBlock to its predecessors requires PHI translation. |
translateValue | translateValue overloads |
translateWithInsertion | translateWithInsertion - PHI translate this value into the specified predecessor block, inserting a computation of the value if it is unavailable. |
verify | verify - Check internal consistency of this data structure. If the structure is valid, it returns true. If invalid, it prints errors and returns false. |