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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/94617] Simple if condition not optimized
Date: Thu, 16 Apr 2020 12:10:12 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D94617

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Note the RTL if-conversion pass doesn't recognize what we present to it.
If you alter initial RTL expansion via -fno-tree-ter (not recommended in
general)
we produce a more 1:1 translation of the code as

_Z16vanilla_bandpassiiiPKcS0_:
.LFB0:
        .cfi_startproc
        movl    %esi, %r9d
        cmpl    %edx, %edi
        setle   %sil
        cmpl    %r9d, %edx
        setl    %al
        testb   %al, %sil
        movq    %rcx, %rax
        cmovne  %r8, %rax
        ret

which I wouldn't expect to execute faster though.=