[llvm-bugs] [Bug 39934] New: [LICM] -licm-control-flow-hoisting triggers "New hoist point expected to dominate old hoist point"
via llvm-bugs
llvm-bugs at lists.llvm.org
Mon Dec 10 01:45:34 PST 2018
https://bugs.llvm.org/show_bug.cgi?id=39934
Bug ID: 39934
Summary: [LICM] -licm-control-flow-hoisting triggers "New hoist
point expected to dominate old hoist point"
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: Loop Optimizer
Assignee: unassignedbugs at nondot.org
Reporter: paulsson at linux.vnet.ibm.com
CC: llvm-bugs at lists.llvm.org
Created attachment 21207
--> https://bugs.llvm.org/attachment.cgi?id=21207&action=edit
reduced testcase
opt -march=z13 -S -O3 tc_licm_CFHoist.ll -o out.opt.ll
-licm-control-flow-hoisting
lib/Transforms/Scalar/LICM.cpp:817: bool llvm::hoistRegion(llvm::DomTreeNode*,
llvm::AliasAnalysis*, llvm::LoopInfo*, llvm::DominatorTree*,
llvm::TargetLibraryInfo*, llvm::Loop*, llvm::AliasSetTracker*,
llvm::ICFLoopSafetyInfo*, llvm::OptimizationRemarkEmitter*): Assertion
`DT->dominates(Dominator, HoistPoint->getParent()) && "New hoist point expected
to dominate old hoist point"' failed.
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