[llvm-bugs] [Bug 45792] New: Provide cross-basic block dead store elimination

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=45792

            Bug ID: 45792
           Summary: Provide cross-basic block dead store elimination
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Scalar Optimizations
          Assignee: unassignedbugs at nondot.org
          Reporter: florian_hahn at apple.com
                CC: llvm-bugs at lists.llvm.org

The current Dead Store Elimination pass in LLVM eliminates stores in a single
BB only. 

A new implementation of DSE using MemorySSA is currently in progress, with the
first patches already landed (https://reviews.llvm.org/rG81dbb6aec626,
https://reviews.llvm.org/rG3a8372ed02ab)

This bug is an umbrella for tasks blocking making the MemorySSA backed DSE the
default

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