https://llvm.org/bugs/show_bug.cgi?id=28888
Bug ID: 28888
Summary: Assertion `Headers.size() >= 2 && "Expected
irreducible CFG; -loop-info is likely invalid"'
failed.
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: Core LLVM classes
Assignee: unassignedb...@nondot.org
Reporter: chisophu...@gmail.com
CC: dber...@dberlin.org, llvm-bugs@lists.llvm.org,
michael.v.zolotuk...@gmail.com
Blocks: 28315
Classification: Unclassified
Created attachment 16905
--> https://llvm.org/bugs/attachment.cgi?id=16905&action=edit
Failing test case.
Stacktrace here: https://reviews.llvm.org/P7179
opt
'-passes=require<targetir>,require<assumptions>,require<scalar-evolution>,require<opt-remark-emit>,loop(unroll),require<block-freq>'
-disable-output $1
(
Does not reproduce with old PM (loop-vectorize was the thing that used
block-freq):
opt -loop-unroll -loop-vectorize -disable-output $1
)
The test case is still quite large, but it seems like the best that bugpoint
can currently do. DannyB, this might be a useful test case for any new magic in
bugpoint.
Michael Z., if you have a moment, could you look at this?
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