[llvm-bugs] [Bug 40038] New: [Loop unswitch + MSSA Loop Dep] Assertion fails: "Incomplete MemoryPhi Node"
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llvm-bugs at lists.llvm.org
Sat Dec 15 07:15:53 PST 2018
https://bugs.llvm.org/show_bug.cgi?id=40038
Bug ID: 40038
Summary: [Loop unswitch + MSSA Loop Dep] Assertion fails:
"Incomplete MemoryPhi Node"
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 21232
--> https://bugs.llvm.org/attachment.cgi?id=21232&action=edit
reduced testcase
opt -march=z13 -S -O3 -o out.opt.ll tc_IncompleteMemPhi.ll
-enable-simple-loop-unswitch -enable-mssa-loop-dependency
lib/Analysis/MemorySSA.cpp:1886: void
llvm::MemorySSA::verifyDefUses(llvm::Function&) const: Assertion
`Phi->getNumOperands() == static_cast<unsigned>(std::distance( pred_begin(&B),
pred_end(&B))) && "Incomplete MemoryPhi Node"' failed.
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