https://bugs.llvm.org/show_bug.cgi?id=39276
Bug ID: 39276
Summary: [SystemZ + SubregLiveness] Assertion
`!NodePtr->isKnownSentinel()' failed.
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: Register Allocator
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Created attachment 21000
--> https://bugs.llvm.org/attachment.cgi?id=21000&action=edit
reduced testcase
llc -mtriple=s390x-linux-gnu -mcpu=z13 ./tc-subregliven-coal.ll
-systemz-subreg-liveness -disable-machine-dce
clang-8: /home/ijonpan/llvm/llvm-dev/include/llvm/ADT/ilist_iterator.h:140:
Assertion `!NodePtr->isKnownSentinel()' failed.
#8 0x000002aa30e16ed0 llvm::SystemZRegisterInfo::shouldCoalesce
#9 0x000002aa3119dd8c (anonymous namespace)::RegisterCoalescer::joinCopy
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