https://bugs.llvm.org/show_bug.cgi?id=46065
Bug ID: 46065
Summary: create a CSE utility function
Product: libraries
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: enhancement
Priority: P
Component: Scalar Optimizations
Assignee: unassignedb...@nondot.org
Reporter: spatel+l...@rotateright.com
CC: llvm-bugs@lists.llvm.org
As mentioned in https://reviews.llvm.org/D80236:
There's a need to perform CSE (and possibly other) cleanup at potentially
multiple places in the optimization pipeline. But running EarlyCSE as a
separate pass means that it is enabled whether or not some other pass made
changes or not.
It would be more efficient if we had something like
"SimplifyInstructionsInBlock()" (or added CSE functionality to that) that did
on-demand cleanup without having to run the full/costly EarlyCSE.
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