Regression

LLVM.DebugInfo/X86.pr12831.ll (from LLVM)

Failing for the past 1 build (Since Failed#7066 )
Took 0.52 sec.

Stacktrace

Script:
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: 'RUN: at line 1';   /Users/buildslave/jenkins/workspace/clang-stage2-cmake-RgSan/clang-build/bin/llc /Users/buildslave/jenkins/workspace/clang-stage2-cmake-RgSan/llvm-project/llvm/test/DebugInfo/X86/pr12831.ll -mtriple=x86_64-unknown-linux-gnu -o /dev/null
--
Exit Code: 134

Command Output (stderr):
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/Users/buildslave/jenkins/workspace/clang-stage2-cmake-RgSan/llvm-project/llvm/include/llvm/CodeGen/ReachingDefAnalysis.h:47:43: runtime error: left shift of negative value -1
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /Users/buildslave/jenkins/workspace/clang-stage2-cmake-RgSan/llvm-project/llvm/include/llvm/CodeGen/ReachingDefAnalysis.h:47:43 in 
PLEASE submit a bug report to https://bugs.llvm.org/ and include the crash backtrace.
Stack dump:
0.	Program arguments: /Users/buildslave/jenkins/workspace/clang-stage2-cmake-RgSan/clang-build/bin/llc /Users/buildslave/jenkins/workspace/clang-stage2-cmake-RgSan/llvm-project/llvm/test/DebugInfo/X86/pr12831.ll -mtriple=x86_64-unknown-linux-gnu -o /dev/null 
1.	Running pass 'Function Pass Manager' on module '/Users/buildslave/jenkins/workspace/clang-stage2-cmake-RgSan/llvm-project/llvm/test/DebugInfo/X86/pr12831.ll'.
2.	Running pass 'ReachingDefAnalysis' on function '@_ZN17BPLFunctionWriter9writeExprEv'
/Users/buildslave/jenkins/workspace/clang-stage2-cmake-RgSan/clang-build/test/DebugInfo/X86/Output/pr12831.ll.script: line 1: 69480 Abort trap: 6           /Users/buildslave/jenkins/workspace/clang-stage2-cmake-RgSan/clang-build/bin/llc /Users/buildslave/jenkins/workspace/clang-stage2-cmake-RgSan/llvm-project/llvm/test/DebugInfo/X86/pr12831.ll -mtriple=x86_64-unknown-linux-gnu -o /dev/null

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