PHINode should have one entry for each predecessor of its parent basic block!
  %setjmpTableSize6961 = phi i32 [ %setjmpTableSize6965, %if.then3148.split ], [ %setjmpTableSize6962, %indirectgoto ], [ %setjmpTableSize6962, %indirectgoto ], [ %setjmpTableSize6995, %if.end105.split.split ]
in function main_loop_step
fatal error: error in backend: Broken function found, compilation aborted!
clang-10: error: clang frontend command failed with exit code 70 (use -v to see invocation)
clang version 10.0.0 (/b/s/w/ir/cache/git/chromium.googlesource.com-external-github.com-llvm-llvm--project 10dad95a75592717d2f7c0ebc181fb8a970a8df7)
Target: wasm32-unknown-emscripten
Thread model: posix
InstalledDir: /opt/sdk/emsdk/upstream/bin
clang-10: note: diagnostic msg: PLEASE submit a bug report to https://bugs.llvm.org/ and include the crash backtrace, preprocessed source, and associated run script.
clang-10: note: diagnostic msg: 
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-10: note: diagnostic msg: /tmp/main-c2bb8b.c
clang-10: note: diagnostic msg: /tmp/main-c2bb8b.sh
clang-10: note: diagnostic msg: 

********************
shared:ERROR: compiler frontend failed to generate LLVM bitcode, halting