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From: "guojiufu at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/63281] powerpc64le creates 64 bit constants
 from scratch instead of loading them
Date: Tue, 21 Dec 2021 09:23:01 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D63281

Jiu Fu Guo <guojiufu at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |guojiufu at gcc dot gnu.org

--- Comment #10 from Jiu Fu Guo <guojiufu at gcc dot gnu.org> ---
With the latest trunk (AT14 is similar), the generated code looks like this:

-O
        lis %r9,0x8123
        ori %r9,%r9,0x4567
        rldimi %r9,%r9,32,0
        std %r9,0(%r10)

Or=20
-O3
        lis %r11,0x1234
        lis %r31,0x2345
        lis %r12,0x3456
        ori %r11,%r11,0x5678
        ori %r31,%r31,0x6781
        ori %r12,%r12,0x7812
        rldimi %r11,%r11,32,0
        rldimi %r31,%r31,32,0
        rldimi %r12,%r12,32,0
...

This code seems better than the previous one.=