hg: jdk/sandbox: 8210416: [linux] Poor StrictMath performance due to non-optimized compilation

[chris.hegarty at oracle.com]

Changeset: e10ade04afe5
Author:    sgehwolf
Date:      2018-09-17 10:53 +0200
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/e10ade04afe5

8210416: [linux] Poor StrictMath performance due to non-optimized compilation
Summary: Compile fdlibm with -O2 -ffp-contract=off on gcc/clang arches.
Reviewed-by: aph, erikj, dholmes, darcy, ihse

! make/autoconf/flags-cflags.m4
! make/autoconf/spec.gmk.in
! make/lib/CoreLibraries.gmk