[llvm] [MemCpyOpt] Drop dead `memmove` calls on `memset`'d source data (PR #101930)
Nikita Popov via llvm-commits
llvm-commits at lists.llvm.org
Wed Nov 27 03:04:54 PST 2024
================
@@ -1843,12 +1844,77 @@ bool MemCpyOptPass::processMemCpy(MemCpyInst *M, BasicBlock::iterator &BBI) {
return false;
}
+/// Memmove calls with overlapping src/dest buffers that come after a memset may
+/// be removed.
+bool MemCpyOptPass::isMemMoveMemSetDependency(MemMoveInst *M) {
+ const auto &DL = M->getDataLayout();
+ MemSetInst *MS = nullptr;
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nikic wrote:
Move MS declaration down.
https://github.com/llvm/llvm-project/pull/101930
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