https://llvm.org/bugs/show_bug.cgi?id=31883
Bug ID: 31883
Summary: LICM spends large part of its time computing Alias
info
Product: libraries
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Keywords: slow-compile
Severity: normal
Priority: P
Component: Scalar Optimizations
Assignee: unassignedb...@nondot.org
Reporter: dav...@freebsd.org
CC: dber...@dberlin.org, llvm-bugs@lists.llvm.org,
simon.f.whitta...@gmail.com
Classification: Unclassified
Created attachment 17942
--> https://llvm.org/bugs/attachment.cgi?id=17942&action=edit
LTO profile
LICM seems to spend 90-95% of its time in AST, which is terribly O(N^2).
This slowness is exacerbated on large files or at LTO time.
See attachment.
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