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Now for __builtin_popcountl we are getting things like vrepli.b $vr0,0 vinsgr2vr.d $vr0,$r4,0 vpcnt.d $vr0,$vr0 vpickve2gr.du $r4,$vr0,0 slli.w $r4,$r4,0 jr $r1 The "vrepli.b" instruction is introduced by the init-regs pass (see PR61810 and all the issues it references). To work it around, we can use post-reload instead of define_expand: the "f" constraint will make the compiler automatically move the scalar between GPR and FPR, and reload is much later than init-regs so init-regs won't get in our way. Now the code looks like: movgr2fr.d $f0,$r4 vpcnt.d $vr0,$vr0 movfr2gr.d $r4,$f0 jr $r1 gcc/ChangeLog: * config/loongarch/loongarch.md (cntmap): Change to uppercase. (popcount<GPR:mode>2): Modify to a post reload split.
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