[llvm-bugs] [Bug 27056] New: clang-cl: The unwind destination does not have an exception handling instruction!

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=27056

            Bug ID: 27056
           Summary: clang-cl: The unwind destination does not have an
                    exception handling instruction!
           Product: clang
           Version: trunk
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: -New Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: stephan.bergmann.secondary at googlemail.com
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

Created attachment 16083
  --> https://llvm.org/bugs/attachment.cgi?id=16083&action=edit
reproducer

At least with recent trunk r264249, running

  clang-cl --target=x86_64-pc-windows-mscv -EHsc -Oxs -c PREPROC.cc

on the attached PREPROC.cc fails with

> The unwind destination does not have an exception handling instruction!
>   %call.i.i.i.i20 = invoke %"struct.STD::vector.1"* @"\01??0?$vector at H@STD@@QEAA at AEBU01@@Z"(%"struct.STD::vector.1"* %scevgep47, %"struct.STD::vector.1"* dereferenceable(8) %scevgep) #3
>           to label %call.i.i.i.i.noexc unwind label %catch.dispatch
> CatchSwitchInst not the first non-PHI instruction in the block.
>   %8 = catchswitch within none [label %catch] unwind to caller
> fatal error: error in backend: Broken function found, compilation aborted!
> clang-3.9: error: clang frontend command failed with exit code 70 (use -v to see invocation)
> clang version 3.9.0 (http://llvm.org/git/clang.git d2ff6d87678662b1692b85f8d803a98e8343ffc9) (http://llvm.org/git/llvm.git 66d1cd513035b7d48d0fb08d71b31884c5f85308)
> Target: x86_64-pc-windows-msvc
> Thread model: posix
> InstalledDir: /home/sbergman/clang/git/inst/bin
> clang-3.9: 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-3.9: note: diagnostic msg: 
> ********************
> 
> PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
> Preprocessed source(s) and associated run script(s) are located at:
> clang-3.9: note: diagnostic msg: /tmp/PREPROC-ce219e.cpp
> clang-3.9: note: diagnostic msg: /tmp/PREPROC-ce219e.sh
> clang-3.9: note: diagnostic msg: 
> 
> ********************


(The content of /tmp/PREPROC-ce219e.sh being

> # Crash reproducer for clang version 3.9.0 (http://llvm.org/git/clang.git d2ff6d87678662b1692b85f8d803a98e8343ffc9) (http://llvm.org/git/llvm.git 66d1cd513035b7d48d0fb08d71b31884c5f85308)
> # Driver args: "--driver-mode=cl" "--target=x86_64-pc-windows-mscv" "-EHsc" "-Oxs" "-c" "PREPROC.cc"
> # Original command:  "/home/sbergman/clang/git/inst/bin/clang-3.9" "-cc1" "-triple" "x86_64-pc-windows-msvc18.0.0" "-emit-obj" "-mincremental-linker-compatible" "-disable-free" "-main-file-name" "PREPROC.cc" "-mrelocation-model" "pic" "-pic-level" "2" "-mthread-model" "posix" "-relaxed-aliasing" "-fmath-errno" "-masm-verbose" "-mconstructor-aliases" "-munwind-tables" "-target-cpu" "x86-64" "-D_MT" "--dependent-lib=libcmt" "--dependent-lib=oldnames" "-fcxx-exceptions" "-fexceptions" "-fexternc-nounwind" "-fms-volatile" "-fdiagnostics-format" "msvc" "-momit-leaf-frame-pointer" "-dwarf-column-info" "-debugger-tuning=gdb" "-coverage-file" "/home/sbergman/TMP/PREPROC.cc" "-resource-dir" "/home/sbergman/clang/git/inst/bin/../lib/clang/3.9.0" "-internal-isystem" "/home/sbergman/clang/git/inst/bin/../lib/clang/3.9.0/include" "-internal-isystem" "C:/Program Files/Microsoft Visual Studio 10.0/VC/include" "-internal-isystem" "C:/Program Files/Microsoft Visual Studio 9.0/VC/include" "-internal
 -isystem" "C:/Program Files/Microsoft Visual Studio 9.0/VC/PlatformSDK/Include" "-internal-isystem" "C:/Program Files/Microsoft Visual Studio 8/VC/include" "-internal-isystem" "C:/Program Files/Microsoft Visual Studio 8/VC/PlatformSDK/Include" "-Os" "-fdeprecated-macro" "-fdebug-compilation-dir" "/home/sbergman/TMP" "-ferror-limit" "19" "-fmessage-length" "165" "-fms-extensions" "-fms-compatibility" "-fms-compatibility-version=18" "-std=c++11" "-fno-threadsafe-statics" "-fdelayed-template-parsing" "-fobjc-runtime=gcc" "-fdiagnostics-show-option" "-fcolor-diagnostics" "-vectorize-loops" "-vectorize-slp" "-o" "PREPROC.obj" "-x" "c++" "PREPROC.cc"
>  "/home/sbergman/clang/git/inst/bin/clang-3.9" "-cc1" "-triple" "x86_64-pc-windows-msvc18.0.0" "-emit-obj" "-mincremental-linker-compatible" "-disable-free" "-main-file-name" "PREPROC.cc" "-mrelocation-model" "pic" "-pic-level" "2" "-mthread-model" "posix" "-relaxed-aliasing" "-fmath-errno" "-masm-verbose" "-mconstructor-aliases" "-munwind-tables" "-target-cpu" "x86-64" "-D_MT" "--dependent-lib=libcmt" "--dependent-lib=oldnames" "-fcxx-exceptions" "-fexceptions" "-fexternc-nounwind" "-fms-volatile" "-fdiagnostics-format" "msvc" "-momit-leaf-frame-pointer" "-dwarf-column-info" "-debugger-tuning=gdb" "-Os" "-fdeprecated-macro" "-ferror-limit" "19" "-fmessage-length" "165" "-fms-extensions" "-fms-compatibility" "-fms-compatibility-version=18" "-std=c++11" "-fno-threadsafe-statics" "-fdelayed-template-parsing" "-fobjc-runtime=gcc" "-fdiagnostics-show-option" "-fcolor-diagnostics" "-vectorize-loops" "-vectorize-slp" "-x" "c++" "PREPROC-ce219e.cpp"

)

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