[llvm-bugs] Issue 15513 in oss-fuzz: llvm/llvm-isel-fuzzer--x86_64-O2: ASSERT: Reg >= X86::FP0 && Reg <= X86::FP6 && "Expected FP register!"

[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-2019-06-27
Type: Bug

New issue 15513 by ClusterFuzz-External: llvm/llvm-isel-fuzzer--x86_64-O2:  
ASSERT: Reg >= X86::FP0 && Reg <= X86::FP6 && "Expected FP register!"
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=15513

Detailed report: https://oss-fuzz.com/testcase?key=5661754861813760

Project: llvm
Fuzzer: libFuzzer_llvm_llvm-isel-fuzzer--x86_64-O2
Fuzz target binary: llvm-isel-fuzzer--x86_64-O2
Job Type: libfuzzer_asan_llvm
Platform Id: linux

Crash Type: ASSERT
Crash Address:
Crash State:
   Reg >= X86::FP0 && Reg <= X86::FP6 && "Expected FP register!"
   FPS::processBasicBlock
   FPS::runOnMachineFunction

Sanitizer: address (ASAN)

Regressed:  
https://oss-fuzz.com/revisions?job=libfuzzer_asan_llvm&range=201712190608:201712210617

Reproducer Testcase:  
https://oss-fuzz.com/download?testcase_id=5661754861813760

Issue filed automatically.

See https://github.com/google/oss-fuzz/blob/master/docs/reproducing.md for  
instructions to reproduce this bug locally.

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