[llvm-bugs] [Bug 50128] New: Building LLVM trunk for Win32 (32-bit) target crashes MSVC

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=50128

            Bug ID: 50128
           Summary: Building LLVM trunk for Win32 (32-bit) target crashes
                    MSVC
           Product: new-bugs
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: release blocker
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: srj at google.com
                CC: htmldeveloper at gmail.com, llvm-bugs at lists.llvm.org

Summary: Building LLVM for 32-bit Win32, using MSVC 2019, on recent trunk
builds, crashes the compiler.

This is using the most recent MSVC 2019 Community Edition on a Win10 x86-64
box:


```
$ vcvarsall.bat x64_x86 
$ cmake -G Ninja C:/path/to/llvm-project/llvm -DCMAKE_BUILD_TYPE=Release
-DCMAKE_INSTALL_PREFIX=C:/path/to/llvm-install -DLLVM_BUILD_32_BITS=ON
-DLLVM_ENABLE_ASSERTIONS=ON -DLLVM_ENABLE_LIBXML2=OFF
-DLLVM_ENABLE_PROJECTS=clang;lld -DLLVM_ENABLE_RTTI=ON
-DLLVM_ENABLE_TERMINFO=OFF
-DLLVM_TARGETS_TO_BUILD=X86;ARM;NVPTX;AArch64;Mips;Hexagon;PowerPC;WebAssembly
$ ninja -C C:/path/to/llvm-build -j 18 install
```

this chugs away for quite some time, but eventually fails building
clang-tblgen, with:

```
[2220/3953] Building CXX object
tools\clang\utils\TableGen\CMakeFiles\clang-tblgen.dir\ClangOpenCLBuiltinEmitter.cpp.obj
FAILED:
tools/clang/utils/TableGen/CMakeFiles/clang-tblgen.dir/ClangOpenCLBuiltinEmitter.cpp.obj 
C:\PROGRA~2\MICROS~2\2019\COMMUN~1\VC\Tools\MSVC\1428~1.293\bin\Hostx64\x86\cl.exe
 /nologo /TP -DCLANG_ROUND_TRIP_CC1_ARGS=ON -DUNICODE
-D_CRT_NONSTDC_NO_DEPRECATE -D_CRT_NONSTDC_NO_WARNINGS
-D_CRT_SECURE_NO_DEPRECATE -D_CRT_SECURE_NO_WARNINGS -D_FILE_OFFSET_BITS=64
-D_GNU_SOURCE -D_HAS_EXCEPTIONS=0 -D_LARGEFILE_SOURCE
-D_SCL_SECURE_NO_DEPRECATE -D_SCL_SECURE_NO_WARNINGS -D_UNICODE
-D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
-Itools\clang\utils\TableGen
-IC:\code\build_bot\worker\llvm-13-x86-32-windows\llvm-project\clang\utils\TableGen
-IC:\code\build_bot\worker\llvm-13-x86-32-windows\llvm-project\clang\include
-Itools\clang\include -Iinclude
-IC:\code\build_bot\worker\llvm-13-x86-32-windows\llvm-project\llvm\include
/DWIN32 /D_WINDOWS   /Zc:inline /Zc:__cplusplus /Zc:strictStrings /Oi
/Zc:rvalueCast /bigobj /W4 -wd4141 -wd4146 -wd4244 -wd4267 -wd4291 -wd4351
-wd4456 -wd4457 -wd4458 -wd4459 -wd4503 -wd4624 -wd4722 -wd4100 -wd4127 -wd4512
-wd4505 -wd4610 -wd4510 -wd4702 -wd4245 -wd4706 -wd4310 -wd4701 -wd4703 -wd4389
-wd4611 -wd4805 -wd4204 -wd4577 -wd4091 -wd4592 -wd4319 -wd4709 -wd4324 -w14062
-we4238 /Gw /MD /O2 /Ob2  /EHs-c- /GR -UNDEBUG -std:c++14 /showIncludes
/Fotools\clang\utils\TableGen\CMakeFiles\clang-tblgen.dir\ClangOpenCLBuiltinEmitter.cpp.obj
/Fdtools\clang\utils\TableGen\CMakeFiles\clang-tblgen.dir\ /FS -c
C:\code\build_bot\worker\llvm-13-x86-32-windows\llvm-project\clang\utils\TableGen\ClangOpenCLBuiltinEmitter.cpp
C:\code\build_bot\worker\llvm-13-x86-32-windows\llvm-project\clang\utils\TableGen\ClangOpenCLBuiltinEmitter.cpp(514)
: fatal error C1001: Internal compiler error.
(compiler file 'd:\A01\_work\3\s\src\vctools\Compiler\Utc\src\p2\main.c', line
212)
 To work around this problem, try simplifying or changing the program near the
locations listed above.
If possible please provide a repro here:
https://developercommunity.visualstudio.com 
Please choose the Technical Support command on the Visual C++ 
 Help menu, or open the Technical Support help file for more information
  cl!RaiseException()+0x69
  cl!RaiseException()+0x69
  cl!CloseTypeServerPDB()+0x22ebf
  cl!CloseTypeServerPDB()+0xedea9
```

I don't (yet) have an injection point for when the failure started occurring,
but it was sometime within the past week. I'll update this bug if/when I find
one.

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