[llvm-bugs] [Bug 47434] New: clang++ fatal error : error in backend: Do not know how to scalarize the result of this operator!

Sat Sep 5 18:15:40 PDT 2020

https://bugs.llvm.org/show_bug.cgi?id=47434

            Bug ID: 47434
           Summary: clang++ fatal error : error in backend: Do not know
                    how to scalarize the result of this operator!
           Product: new-bugs
           Version: unspecified
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: scott.waye at hubse.com
                CC: htmldeveloper at gmail.com, llvm-bugs at lists.llvm.org

When compiling some bitcode I'm getting this fatal error

  ScalarizeVectorResult #0: t59: v1i32 = rotl t56, t40, BitOperations.cs:366 @[
HashCode.cs:279 ]

EXEC : fatal error : error in backend: Do not know how to scalarize the result
of this operator!
[E:\GitHub\corert\tests\src\Simple\HelloWasm\HelloWasm.csproj]

  PLEASE submit a bug report to https://bugs.llvm.org/ and include the crash
backtrace, preprocessed source, and associated run script.
  Stack dump:
  0.    Program arguments: E:/GitHub/emsdk/upstream/bin\clang++.exe -target
wasm32-unknown-emscripten -D__EMSCRIPTEN_major__=2 -D__EMSCRIPTEN_minor__=0
-D__EMSCRIPTEN_tiny__=1 -D_LIBCPP_ABI_VERSION=2 -Dunix -D__unix -D__unix__
-Werror=implicit-function-declaration -Xclang -nostdsysteminc -Xclang
-isystemE:\GitHub\emsdk\upstream\emscripten\system\include\libcxx -Xclang
-isystemE:\GitHub\emsdk\upstream\emscripten\system\lib\libcxxabi\include
-Xclang -isystemE:\GitHub\emsdk\upstream\emscripten\system\include\compat
-Xclang -isystemE:\GitHub\emsdk\upstream\emscripten\system\include -Xclang
-isystemE:\GitHub\emsdk\upstream\emscripten\system\include\libc -Xclang
-isystemE:\GitHub\emsdk\upstream\emscripten\system\lib\libc\musl\arch\emscripten
-Xclang -isystemE:\GitHub\emsdk\upstream\emscripten\system\local\include
-Xclang -isystemE:\GitHub\emsdk\upstream\emscripten\system\include\SSE -Xclang
-isystemE:\GitHub\emsdk\upstream\emscripten\system\lib\compiler-rt\include
-Xclang
-isystemE:\GitHub\emsdk\upstream\emscripten\system\lib\libunwind\include
-Xclang -isystemE:\GitHub\emsdk\upstream\emscripten\cache\wasm\include
-DEMSCRIPTEN -c -o
E:\GitHub\corert\tests\src\Simple\HelloWasm\obj\Release\wasm\native\HelloWasm.o
-O2
E:\GitHub\corert\tests\src\Simple\HelloWasm\obj\Release\wasm\native\HelloWasm.bc
-Xclang -isystemE:\GitHub\emsdk\upstream\emscripten\system\include\SDL -c -o
E:\GitHub\corert\tests\src\Simple\HelloWasm\obj\Release\wasm\native\HelloWasm.o
-mllvm -combiner-global-alias-analysis=false -mllvm
-enable-emscripten-cxx-exceptions -mllvm -enable-emscripten-sjlj -mllvm
-disable-lsr
  1.    Code generation
  2.    Running pass 'Function Pass Manager' on module
'E:\GitHub\corert\tests\src\Simple\HelloWasm\obj\Release\wasm\native\HelloWasm.bc'.
  3.    Running pass 'WebAssembly Instruction Selection' on function
'@S_P_CoreLib_System_HashCode__MixState'
   #0 0x00007ffec85b3e49 (C:\WINDOWS\System32\KERNELBASE.dll+0x23e49)
   #1 0x00007ff7f389527a (E:\GitHub\emsdk\upstream\bin\clang++.exe+0x10c527a)
   #2 0x00007ff7f3867f43 (E:\GitHub\emsdk\upstream\bin\clang++.exe+0x1097f43)
   #3 0x00007ff7f27d79a9 (E:\GitHub\emsdk\upstream\bin\clang++.exe+0x79a9)
   #4 0x00007ff7f38a9e85 (E:\GitHub\emsdk\upstream\bin\clang++.exe+0x10d9e85)
   #5 0x00007ff7f38a9d67 (E:\GitHub\emsdk\upstream\bin\clang++.exe+0x10d9d67)
   #6 0x00007ff7f4770812 (E:\GitHub\emsdk\upstream\bin\clang++.exe+0x1fa0812)
   #7 0x00007ff7f46c392f (E:\GitHub\emsdk\upstream\bin\clang++.exe+0x1ef392f)
   #8 0x00007ff7f46c9dea (E:\GitHub\emsdk\upstream\bin\clang++.exe+0x1ef9dea)
   #9 0x00007ff7f450800f (E:\GitHub\emsdk\upstream\bin\clang++.exe+0x1d3800f)
  #10 0x00007ff7f45077c5 (E:\GitHub\emsdk\upstream\bin\clang++.exe+0x1d377c5)
  #11 0x00007ff7f4506ff4 (E:\GitHub\emsdk\upstream\bin\clang++.exe+0x1d36ff4)
  #12 0x00007ff7f4502e8c (E:\GitHub\emsdk\upstream\bin\clang++.exe+0x1d32e8c)
  #13 0x00007ff7f2bef070 (E:\GitHub\emsdk\upstream\bin\clang++.exe+0x41f070)
  #14 0x00007ff7f2ec47ee (E:\GitHub\emsdk\upstream\bin\clang++.exe+0x6f47ee)
  #15 0x00007ff7f31fe119 (E:\GitHub\emsdk\upstream\bin\clang++.exe+0xa2e119)
  #16 0x00007ff7f3204c03 (E:\GitHub\emsdk\upstream\bin\clang++.exe+0xa34c03)
  #17 0x00007ff7f31fe85d (E:\GitHub\emsdk\upstream\bin\clang++.exe+0xa2e85d)
  #18 0x00007ff7f3b91b70 (E:\GitHub\emsdk\upstream\bin\clang++.exe+0x13c1b70)
  #19 0x00007ff7f64844e2 (E:\GitHub\emsdk\upstream\bin\clang++.exe+0x3cb44e2)
  #20 0x00007ff7f417c515 (E:\GitHub\emsdk\upstream\bin\clang++.exe+0x19ac515)
  #21 0x00007ff7f4139d4b (E:\GitHub\emsdk\upstream\bin\clang++.exe+0x1969d4b)
  #22 0x00007ff7f41f109b (E:\GitHub\emsdk\upstream\bin\clang++.exe+0x1a2109b)
  #23 0x00007ff7f27d75fa (E:\GitHub\emsdk\upstream\bin\clang++.exe+0x75fa)
  #24 0x00007ff7f27d4914 (E:\GitHub\emsdk\upstream\bin\clang++.exe+0x4914)
  #25 0x00007ff7f40cb1b6 (E:\GitHub\emsdk\upstream\bin\clang++.exe+0x18fb1b6)
  #26 0x00007ff7f38950c3 (E:\GitHub\emsdk\upstream\bin\clang++.exe+0x10c50c3)
  #27 0x00007ff7f40ca9f3 (E:\GitHub\emsdk\upstream\bin\clang++.exe+0x18fa9f3)
  #28 0x00007ff7f3fc77c5 (E:\GitHub\emsdk\upstream\bin\clang++.exe+0x17f77c5)
  #29 0x00007ff7f3fc7b6b (E:\GitHub\emsdk\upstream\bin\clang++.exe+0x17f7b6b)
  #30 0x00007ff7f3fb38a7 (E:\GitHub\emsdk\upstream\bin\clang++.exe+0x17e38a7)
  #31 0x00007ff7f27d42c3 (E:\GitHub\emsdk\upstream\bin\clang++.exe+0x42c3)
  #32 0x00007ff7f64ae2f0 (E:\GitHub\emsdk\upstream\bin\clang++.exe+0x3cde2f0)
  #33 0x00007ffecaa26fd4 (C:\WINDOWS\System32\KERNEL32.DLL+0x16fd4)
  #34 0x00007ffecabbcec1 (C:\WINDOWS\SYSTEM32\ntdll.dll+0x4cec1)
clang++ : error : clang frontend command failed with exit code 70 (use -v to
see invocation) [E:\GitHub\corert\tests\src\Simple\HelloWasm\HelloWasm.csproj]
  clang version 12.0.0
(Cswircachegitchromium.googlesource.com-external-github.com-llvm-llvm--project
365f861c45bb504c7b61f64943916fc570818cd1)
  Target: wasm32-unknown-emscripten
  Thread model: posix
  InstalledDir: E:/GitHub/emsdk/upstream/bin
  clang++: note: diagnostic msg: Error generating preprocessed source(s) - no
preprocessable inputs.

I'll try and get it in the debugger so I have a change to narrow down which
LLVM IR function is causing the problem.

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