[Bug rtl-optimization/63281] powerpc64le creates 64 bit constants from scratch instead of loading them

[guojiufu at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63281

--- Comment #21 from Jiu Fu Guo <guojiufu at gcc dot gnu.org> ---
Also had a test on powerpc, -m32.  As testing, it seems no significant benefit
loading from 'rodata' vs. building constants by instructions.

        lis %r7,0x410
        ori %r7,%r7,0x103c
        lis %r6,0x710
        ori %r6,%r6,0xe005

        lis %r12,.LC3@ha
        la %r12,.LC3@l(%r12)
        lwz %r3,0(%r12)
        lwz %r4,4(%r12)