[Bug target/53399] "*ffs" pattern generates wrong code with BMI enabled (for corner cases)

kirill.yukhin at intel dot com gcc-bugzilla@gcc.gnu.org
Sun May 20 16:03:00 GMT 2012


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53399

--- Comment #6 from Yukhin Kirill <kirill.yukhin at intel dot com> 2012-05-20 15:54:38 UTC ---
> 
> Can you please isolate failing test?

Sure, it is attached.
It works when compiled this way:
/export/home/kyukhin/gcc/build/build-x86_64-linux/gcc/xgcc
-B/export/home/kyukhin/gcc/build/build-x86_64-linux/gcc/ 1.c -march=core2

And fails to run (on BMI*- capable HW) when compiled this way:
/export/home/kyukhin/gcc/build/build-x86_64-linux/gcc/xgcc
-B/export/home/kyukhin/gcc/build/build-x86_64-linux/gcc/ 1.c -march=core-avx2



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