A similar crash bug maybe due to llvm::APInt::udiv and llvm::APInt::sdiv

Source

#include "cd.h"

int main() {
  int a;
  int32_t b = 8;
  for (;; a++) {
    double c = b / a;
    transparent_crc_bytes(&c, c, "", 1);
  }
  return 0;
}

Reproduce: /opt/cheerp/bin/clang -target cheerp-wasm random.c -o random_cheerp.js > compile.cheerp.txt 2>&1

Log:

random.c:8:27: warning: incompatible pointer types passing 'double *' to parameter of type 'char *' [-Wincompatible-pointer-types]
    transparent_crc_bytes(&c, c, "", 1);
                          ^~
./cd.h:85:30: note: passing argument to parameter 'ptr' here
transparent_crc_bytes (char *ptr, int nbytes, char* vname, int flag)
                             ^
1 warning generated.
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
Stack dump:
0.  Program arguments: /opt/cheerp/bin/opt -march=cheerp -cheerp-linear-output=wasm -cheerp-lto -passes=function(CheerpLowerInvoke),function(simplifycfg),CallConstructors,GlobalDepsAnalyzer,TypeOptimizer,function(CheerpLowerSwitch),I64Lowering,function(ReplaceNopCastsAndByteSwaps),FreeAndDeleteRemoval,default<Os>,PartialExecuter,function(simplifycfg) -o /tmp/random-ab2bd1.bc /tmp/random-0d9257.bc
 #0 0x0000000001f9fe13 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/cheerp/bin/opt+0x1f9fe13)
 #1 0x0000000001f9e0e0 llvm::sys::RunSignalHandlers() (/opt/cheerp/bin/opt+0x1f9e0e0)
 #2 0x0000000001fa02bf (/opt/cheerp/bin/opt+0x1fa02bf)
 #3 0x00007f6339fb13c0 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x143c0)
 #4 0x0000000001ef9299 llvm::APInt::udiv(llvm::APInt const&) const (/opt/cheerp/bin/opt+0x1ef9299)
 #5 0x0000000001efb577 llvm::APInt::sdiv(llvm::APInt const&) const (/opt/cheerp/bin/opt+0x1efb577)
 #6 0x0000000002856e07 llvm::Interpreter::visitBinaryOperator(llvm::BinaryOperator&) (/opt/cheerp/bin/opt+0x2856e07)
 #7 0x0000000002840a6e (/opt/cheerp/bin/opt+0x2840a6e)
 #8 0x0000000002846c2f (/opt/cheerp/bin/opt+0x2846c2f)
 #9 0x00000000028430bc (/opt/cheerp/bin/opt+0x28430bc)
#10 0x000000000284314a (/opt/cheerp/bin/opt+0x284314a)
#11 0x0000000002849824 (/opt/cheerp/bin/opt+0x2849824)
#12 0x000000000284930b (/opt/cheerp/bin/opt+0x284930b)
#13 0x0000000002843480 cheerp::PartialExecuter::runOnModule(llvm::Module&) (/opt/cheerp/bin/opt+0x2843480)
#14 0x000000000284383c cheerp::PartialExecuterPass::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/opt/cheerp/bin/opt+0x284383c)
#15 0x000000000225f41d (/opt/cheerp/bin/opt+0x225f41d)
#16 0x000000000189a687 llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module> >::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/opt/cheerp/bin/opt+0x189a687)
#17 0x0000000000d2272a llvm::runPassPipeline(llvm::StringRef, llvm::Module&, llvm::TargetMachine*, llvm::TargetLibraryInfoImpl*, llvm::ToolOutputFile*, llvm::ToolOutputFile*, llvm::ToolOutputFile*, llvm::StringRef, llvm::ArrayRef<llvm::StringRef>, llvm::ArrayRef<llvm::PassPlugin>, llvm::opt_tool::OutputKind, llvm::opt_tool::VerifierKind, bool, bool, bool, bool, bool, bool) (/opt/cheerp/bin/opt+0xd2272a)
#18 0x0000000000d31ad7 main (/opt/cheerp/bin/opt+0xd31ad7)
#19 0x00007f6339a710b3 __libc_start_main /build/glibc-sMfBJT/glibc-2.31/csu/../csu/libc-start.c:342:3
#20 0x0000000000d1b32e _start (/opt/cheerp/bin/opt+0xd1b32e)
clang-16: error: unable to execute command: Floating point exception (core dumped)
clang-16: error: optimizer command failed due to signal (use -v to see invocation)
Cheerp 1670679767-1~focal clang version 16.0.0
Target: cheerp-leaningtech-webbrowser-wasm
Thread model: posix
InstalledDir: /opt/cheerp/bin
clang-16: note: diagnostic msg: 
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-16: note: diagnostic msg: /tmp/random-322cf6.c
clang-16: note: diagnostic msg: /tmp/random-322cf6.sh
clang-16: note: diagnostic msg: 

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

Version:

Cheerp 1670679767-1~focal clang version 16.0.0
Target: cheerp-leaningtech-webbrowser-wasm
Thread model: posix
InstalledDir: /opt/cheerp/bin

Detail as attached. 1-4-crash-rem.zip

leaningtech / cheerp-meta

A similar crash bug maybe due to llvm::APInt::udiv and llvm::APInt::sdiv #140