https://bugs.llvm.org/show_bug.cgi?id=36586
Bug ID: 36586
Summary: [LoopInterchange] Assert triggered: "Branch leaving
loop latch must have 2 successors"
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: Loop Optimizer
Assignee: unassignedb...@nondot.org
Reporter: pauls...@linux.vnet.ibm.com
CC: llvm-bugs@lists.llvm.org
Created attachment 19991
--> https://bugs.llvm.org/attachment.cgi?id=19991&action=edit
reduced test case
bin/opt -mtriple=s390x-linux-gnu -mcpu=z13 tc_loopinterch_reduced.ll -S -o
out.opt -enable-gvn-sink -enable-loopinterchange -instcombine -inline -sroa
-early-cse-memssa -simplifycfg -jump-threading -instcombine -simplifycfg
-loop-rotate -simplifycfg -indvars -loop-interchange
opt: lib/Transforms/Scalar/LoopInterchange.cpp:758: llvm::BasicBlock*
getLoopLatchExitBlock(llvm::BasicBlock*, llvm::BasicBlock*): Assertion
`BI->getNumSuccessors() == 2 && "Branch leaving loop latch must have 2
successors"' failed.
...
#10 0x000002aa1bf23700 (anonymous
namespace)::LoopInterchange::runOnFunction(llvm::Function&)
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