On Core 2, I am using gcc 4.4 revision 139589 as baseline.
On 64bit, I compare
O2: -O2 -ffast-math
O3: -O3 -ffast-math -funroll-loops
On 32bit, I compare
O2: -O2 -msse2 -mfpmath=sse -ffast-math
O3: -O3 -msse2 -mfpmath=sse -ffast-math -funroll-loops
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Summary: IRA performance impact on SPEC CPU 2K/2006
Product: gcc
Version: 4.4.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: hjl dot tools at gmail dot com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37397
