https://bugs.llvm.org/show_bug.cgi?id=32591
Bug ID: 32591
Summary: opt crashes with "-simplifycfg -lcssa -loop-unswitch":
Assertion `InLCSSA && "Requested to preserve LCSSA,
but it's already broken."'
Product: new-bugs
Version: unspecified
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: new bugs
Assignee: unassignedb...@nondot.org
Reporter: mikael.hol...@ericsson.com
CC: llvm-bugs@lists.llvm.org
Created attachment 18256
--> https://bugs.llvm.org/attachment.cgi?id=18256&action=edit
csmith generated, bugpoint reduced reproducer
opt -S -simplifycfg -lcssa -loop-unswitch red.ll
gives
opt: ../lib/Transforms/Utils/LoopSimplify.cpp:738: bool
llvm::simplifyLoop(llvm::Loop *, llvm::DominatorTree *, llvm::LoopInfo *,
llvm::ScalarEvolution *, llvm::AssumptionCache *, bool): Assertion
`L->isRecursivelyLCSSAForm(*DT, *LI) && "Requested to preserve LCSSA, but it's
already broken."' failed.
Similar to PR31198
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