[llvm-bugs] Issue 19612 in oss-fuzz: llvm:llvm-isel-fuzzer--wasm32-O2: ASSERT: (Value == 0 || llvm::isPowerOf2_64(Value)) && "Alignment is neither 0 nor a powe

[ClusterFuzz-External via monorail via llvm-bugs]

Status: New
Owner: ----
CC: kcc at google.com, mascasa at google.com, jdevlieg... at apple.com,  
igm... at gmail.com, davg at google.com, mitchp at google.com,  
bigchees... at gmail.com, eneyman at google.com, llvm-b... at lists.llvm.org,  
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Labels: ClusterFuzz Stability-Memory-AddressSanitizer Reproducible  
Engine-libfuzzer OS-Linux Proj-llvm Reported-2019-12-20
Type: Bug

New issue 19612 by ClusterFuzz-External: llvm:llvm-isel-fuzzer--wasm32-O2:  
ASSERT: (Value == 0 || llvm::isPowerOf2_64(Value)) && "Alignment is neither  
0 nor a powe
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=19612

Detailed Report: https://oss-fuzz.com/testcase?key=5677599649169408

Project: llvm
Fuzzing Engine: libFuzzer
Fuzz Target: llvm-isel-fuzzer--wasm32-O2
Job Type: libfuzzer_msan_llvm
Platform Id: linux

Crash Type: ASSERT
Crash Address:
Crash State:
   (Value == 0 || llvm::isPowerOf2_64(Value)) && "Alignment is neither 0 nor  
a powe
   ScalarizeMaskedMemIntrin::optimizeCallInst
   ScalarizeMaskedMemIntrin::runOnFunction

Sanitizer: memory (MSAN)

Regressed:  
https://oss-fuzz.com/revisions?job=libfuzzer_msan_llvm&range=201912130427:201912200437

Reproducer Testcase:  
https://oss-fuzz.com/download?testcase_id=5677599649169408

Issue filed automatically.

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