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Subject: [Bug tree-optimization/46142] [4.6 Regression] FMA test failures
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46142

--- Comment #7 from H.J. Lu <hjl.tools at gmail dot com> 2010-10-31 14:27:41 UTC ---
When configured with --with-cpu=atom, I got

FAIL: gcc.target/i386/fma3-builtin-2.c scan-assembler-times vfmadd...pd 1
FAIL: gcc.target/i386/fma3-builtin-2.c scan-assembler-times vfmsub...pd 1
FAIL: gcc.target/i386/fma3-builtin-2.c scan-assembler-times vfnmadd...pd 1
FAIL: gcc.target/i386/fma3-builtin-2.c scan-assembler-times vfnmsub...pd 1
FAIL: gcc.target/i386/fma4-builtin-2.c scan-assembler-times vfmaddpd 1
FAIL: gcc.target/i386/fma4-builtin-2.c scan-assembler-times vfmsubpd 1
FAIL: gcc.target/i386/fma4-builtin-2.c scan-assembler-times vfnmaddpd 1
FAIL: gcc.target/i386/fma4-builtin-2.c scan-assembler-times vfnmsubpd 1

since -mtune=atom disables double precision vectorizer.
We need to pass -mtune=generic to those 2 testcases.