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...tack trace: > > #0 __strlen_sse2_pminub () at > ../sysdeps/x86_64/multiarch/strlen-sse2-pminub.S:33 > #1 0x00005555555587ff in __dfsw_strlen (s=0x55555556fe17 "foo", > s_label=<optimized out>, ret_label=0x7fffffffddee) > at llvm/projects/compiler-rt/lib/dfsan/dfsan_custom.cc:203 > #2 0x000055555556bbdc in dfsw$strlen () > #3 0x000055555556bb51 in len (strlen_ptr=0x55555556bbc0 <dfsw$strlen>, > str=0x55555556fe17 "foo") at strlen.c:5 > #4 0x000055555556bb96 in main () > > In this stack trace, #2 is the compiler-generated wrapper f...

Hi Peter, After discovering several bugs in ArgumentPromotion and DeadArgumentElimination where llvm::Functions were replaced with similar functions (with the same name) to transform their type in some way, I started looking at all calls to llvm::Function::takeName to see if there were any other debug info quality bugs in similar callers. One such caller is the DataFlowSanitizer, and I don't

...en_sse2_pminub () at >>> ../sysdeps/x86_64/multiarch/strlen-sse2-pminub.S:33 >>> #1 0x00005555555587ff in __dfsw_strlen (s=0x55555556fe17 "foo", >>> s_label=<optimized out>, ret_label=0x7fffffffddee) >>> at llvm/projects/compiler-rt/lib/dfsan/dfsan_custom.cc:203 >>> #2 0x000055555556bbdc in dfsw$strlen () >>> #3 0x000055555556bb51 in len (strlen_ptr=0x55555556bbc0 <dfsw$strlen>, >>> str=0x55555556fe17 "foo") at strlen.c:5 >>> #4 0x000055555556bb96 in main () >>> >>> In this sta...

...gt; ../sysdeps/x86_64/multiarch/strlen-sse2-pminub.S:33 > > >>> #1 0x00005555555587ff in __dfsw_strlen (s=0x55555556fe17 "foo", > > >>> s_label=<optimized out>, ret_label=0x7fffffffddee) > > >>> at llvm/projects/compiler-rt/lib/dfsan/dfsan_custom.cc:203 > > >>> #2 0x000055555556bbdc in dfsw$strlen () > > >>> #3 0x000055555556bb51 in len (strlen_ptr=0x55555556bbc0 > <dfsw$strlen>, > > >>> str=0x55555556fe17 "foo") at strlen.c:5 > > >>> #4 0x000055555556bb96 in...

...h/strlen-sse2-pminub.S:33 > > > > >>> #1 0x00005555555587ff in __dfsw_strlen (s=0x55555556fe17 "foo", > > > > >>> s_label=<optimized out>, ret_label=0x7fffffffddee) > > > > >>> at llvm/projects/compiler-rt/lib/dfsan/dfsan_custom.cc:203 > > > > >>> #2 0x000055555556bbdc in dfsw$strlen () > > > > >>> #3 0x000055555556bb51 in len (strlen_ptr=0x55555556bbc0 > > > <dfsw$strlen>, > > > > >>> str=0x55555556fe17 "foo") at strlen.c:5 > >...