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[Bug target/53399] "*ffs" pattern generates wrong code with BMI enabled (for corner cases)
- From: "kirill.yukhin at intel dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Sun, 20 May 2012 15:54:08 +0000
- Subject: [Bug target/53399] "*ffs" pattern generates wrong code with BMI enabled (for corner cases)
- Auto-submitted: auto-generated
- References: <bug-53399-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53399
--- Comment #5 from Yukhin Kirill <kirill.yukhin at intel dot com> 2012-05-20 15:54:08 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