[llvm-bugs] Issue 40818 in oss-fuzz: llvm:llvm-isel-fuzzer--aarch64-gisel: ASSERT: (&MBB != &MBB.getParent()->front() || IgnoreMissingDefs) && "no reload in start

ClusterFuzz-External via monorail via llvm-bugs llvm-bugs at lists.llvm.org
Sun Nov 7 19:04:41 PST 2021


Status: New
Owner: ----
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Labels: ClusterFuzz Stability-Memory-AddressSanitizer Reproducible Engine-libfuzzer OS-Linux Proj-llvm Reported-2021-11-08
Type: Bug

New issue 40818 by ClusterFuzz-External: llvm:llvm-isel-fuzzer--aarch64-gisel: ASSERT: (&MBB != &MBB.getParent()->front() || IgnoreMissingDefs) && "no reload in start 
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=40818

Detailed Report: https://oss-fuzz.com/testcase?key=5740382349033472

Project: llvm
Fuzzing Engine: libFuzzer
Fuzz Target: llvm-isel-fuzzer--aarch64-gisel
Job Type: libfuzzer_asan_llvm
Platform Id: linux

Crash Type: ASSERT
Crash Address: 
Crash State:
  (&MBB != &MBB.getParent()->front() || IgnoreMissingDefs) && "no reload in start 
  RegAllocFast::allocateBasicBlock
  RegAllocFast::runOnMachineFunction
  
Sanitizer: address (ASAN)

Regressed: https://oss-fuzz.com/revisions?job=libfuzzer_asan_llvm&range=202010260620:202010270627

Reproducer Testcase: https://oss-fuzz.com/download?testcase_id=5740382349033472

Issue filed automatically.

See https://google.github.io/oss-fuzz/advanced-topics/reproducing for instructions to reproduce this bug locally.
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