https://llvm.org/bugs/show_bug.cgi?id=23213
Bug ID: 23213
Summary: Failure to hoist loop invariant
Product: libraries
Version: trunk
Hardware: All
OS: All
Status: NEW
Severity: normal
Priority: P
Component: Scalar Optimizations
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
Created attachment 14196
--> https://llvm.org/bugs/attachment.cgi?id=14196&action=edit
Original C++ Code
LLVM fails to properly optimize the attached code from Mike Acton's talk "How
to Write Code the Compiler Can Actually Optimize".
The issue is that Foo::Bar is inlined into Foo::Baz before Foo::Bar has been
optimized, and LICM/SCEV can't handle the resulting double loop.
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