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MemorySSA: Stop tracking def-or-use blocks. 

The tracking is unused, since MemoryPhis are not pruned as of r282419.

Differential Revision: https://reviews.llvm.org/D32121

llvm-svn: 300428
This commit is contained in:
Bryant Wong 2017-04-16 19:45:51 +00:00
parent ae33dfac6e
commit c819ba8874
1 changed files with 0 additions and 3 deletions
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3
llvm/lib/Analysis/MemorySSA.cpp
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@ -1291,7 +1291,6 @@ void MemorySSA::buildMemorySSA() {
// could just look up the memory access for every possible instruction in the // could just look up the memory access for every possible instruction in the
// stream. // stream.
SmallPtrSet<BasicBlock *, 32> DefiningBlocks; SmallPtrSet<BasicBlock *, 32> DefiningBlocks;
SmallPtrSet<BasicBlock *, 32> DefUseBlocks;
// Go through each block, figure out where defs occur, and chain together all // Go through each block, figure out where defs occur, and chain together all
// the accesses. // the accesses.
for (BasicBlock &B : F) { for (BasicBlock &B : F) {
@ -1316,8 +1315,6 @@ void MemorySSA::buildMemorySSA() {
} }
if (InsertIntoDef) if (InsertIntoDef)
DefiningBlocks.insert(&B); DefiningBlocks.insert(&B);
if (Accesses)
DefUseBlocks.insert(&B);
} }
placePHINodes(DefiningBlocks, BBNumbers); placePHINodes(DefiningBlocks, BBNumbers);