--- Comment #7 from H.J. Lu < at gmail dot com> ---
(In reply to Mike Lothian from comment #6)
> I tried the test case with
> gcc -O2 -march=native test.c -o test
> and 
> gcc -O2 -march=native -mno-bmi test.c -o test
> Both executables seem to run with no output
> I've only seen the issue in radeonsi in Mesa with LLVM, I'm not sure what's
> happening as the problem doesn't manifest when debugging is enabled so I'm
> not sure how to create a smaller test case

Compile radeonsi one function at a time with and without -mbmi to
find out the smallest function which causes the problem with -mbmi.
If the function is small enough, we can take a guess.

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