[llvm-bugs] [Bug 28632] New: Assertion failed: Q.Visited.size() < 1000 && "Visited too much", file C:\src\upstream\llvm39\lib\Transforms\Utils\MemorySSA.cpp, line 1228

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=28632

            Bug ID: 28632
           Summary: Assertion failed: Q.Visited.size() < 1000 && "Visited
                    too much", file
                    C:\src\upstream\llvm39\lib\Transforms\Utils\MemorySSA.
                    cpp, line 1228
           Product: new-bugs
           Version: 3.9
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: douglas_yung at playstation.sony.com
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

Created attachment 16776
  --> https://llvm.org/bugs/attachment.cgi?id=16776&action=edit
Repro test file

When the attached test is compiled with a 3.9 compiler and optimizations
enabled, the compiler hits an assertion failure.

clang -c -O1 repro.c
Assertion failed: Q.Visited.size() < 1000 && "Visited too much", file
C:\src\upstream\llvm39\lib\Transforms\Utils\MemorySSA.cpp, line 1228
Wrote crash dump file
"C:\Users\DOUGLA~1\AppData\Local\Temp\clang.exe-1da7e1.dmp"
#0 0x00000001405e41f5 (C:\src\upstream\276194\Release\bin\clang.exe+0xf941f5)
#1 0x000007fef402ee1d (C:\Windows\system32\MSVCR120.dll+0x6ee1d)
#2 0x000007fef4034a14 (C:\Windows\system32\MSVCR120.dll+0x74a14)
#3 0x000007fef4035d5f (C:\Windows\system32\MSVCR120.dll+0x75d5f)
#4 0x00000001406b6827 (C:\src\upstream\276194\Release\bin\clang.exe+0x1066827)
#5 0x00000001406b652b (C:\src\upstream\276194\Release\bin\clang.exe+0x106652b)

<Skipping many lines>

#254 0x00000001406b652b
(C:\src\upstream\276194\Release\bin\clang.exe+0x106652b)
#255 0x00000001406b652b
(C:\src\upstream\276194\Release\bin\clang.exe+0x106652b)
clang.exe: error: clang frontend command failed due to signal (use -v to see
invocation)
clang version 3.9.0 (branches/release_39 276194)
Target: x86_64-pc-windows-msvc
Thread model: posix
InstalledDir: C:\src\upstream\276194\Release\bin
clang.exe: note: diagnostic msg: PLEASE submit a bug report to
http://llvm.org/bugs/ and include the crash backtrace, preprocessed source, and
associated run script.
clang.exe: note: diagnostic msg: 
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang.exe: note: diagnostic msg:
C:\Users\DOUGLA~1\AppData\Local\Temp\repro-f6760f.c
clang.exe: note: diagnostic msg:
C:\Users\DOUGLA~1\AppData\Local\Temp\repro-f6760f.sh
clang.exe: note: diagnostic msg: 

********************

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