[llvm-bugs] Issue 17091 in oss-fuzz: llvm:llvm-opt-fuzzer--x86_64-strength_reduce: ASSERT: !BaseRegs.empty() && "1*reg => reg, should not be needed."

[ClusterFuzz-External via monorail via llvm-bugs]

Status: New
Owner: ----
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Labels: ClusterFuzz Stability-Memory-AddressSanitizer Reproducible  
Engine-libfuzzer OS-Linux Proj-llvm Reported-2019-09-09
Type: Bug

New issue 17091 by ClusterFuzz-External:  
llvm:llvm-opt-fuzzer--x86_64-strength_reduce: ASSERT: !BaseRegs.empty()  
&& "1*reg => reg, should not be needed."
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=17091

Detailed Report: https://oss-fuzz.com/testcase?key=5630487451664384

Project: llvm
Fuzzing Engine: libFuzzer
Fuzz Target: llvm-opt-fuzzer--x86_64-strength_reduce
Job Type: libfuzzer_asan_llvm
Platform Id: linux

Crash Type: ASSERT
Crash Address:
Crash State:
   !BaseRegs.empty() && "1*reg => reg, should not be needed."
   Formula::canonicalize
   LSRInstance::GenerateReassociationsImpl

Sanitizer: address (ASAN)

Regressed:  
https://oss-fuzz.com/revisions?job=libfuzzer_asan_llvm&range=201802210603:201802211531

Reproducer Testcase:  
https://oss-fuzz.com/download?testcase_id=5630487451664384

Issue filed automatically.

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

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