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[LoongArch] Fix codegen for ISD::ROTR #100292

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merged 1 commit into from
Jul 24, 2024
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[LoongArch] Fix codegen for ISD::ROTR #100292

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1 change: 0 additions & 1 deletion llvm/lib/Target/LoongArch/LoongArchInstrInfo.td
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Original file line number Diff line number Diff line change
Expand Up @@ -1144,7 +1144,6 @@ def : PatGprGpr<urem, MOD_DU>;
def : PatGprGpr<loongarch_mod_wu, MOD_WU>;
def : PatGprGpr<rotr, ROTR_D>;
def : PatGprGpr<loongarch_rotr_w, ROTR_W>;
def : PatGprGpr_32<rotr, ROTR_W>;
def : PatGprImm<rotr, ROTRI_D, uimm6>;
def : PatGprImm_32<rotr, ROTRI_W, uimm5>;
def : PatGprImm<loongarch_rotr_w, ROTRI_W, uimm5>;
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36 changes: 36 additions & 0 deletions llvm/test/CodeGen/LoongArch/rotl-rotr.ll
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Expand Up @@ -504,6 +504,42 @@ define i64 @rotr_64_mask_or_128_or_64(i64 %x, i64 %y) nounwind {
ret i64 %f
}

define signext i32 @rotr_64_trunc_32(i64 %x, i64 %y) nounwind {
; LA32-LABEL: rotr_64_trunc_32:
; LA32: # %bb.0:
; LA32-NEXT: srl.w $a3, $a0, $a2
; LA32-NEXT: xori $a4, $a2, 31
; LA32-NEXT: slli.w $a5, $a1, 1
; LA32-NEXT: sll.w $a4, $a5, $a4
; LA32-NEXT: or $a3, $a3, $a4
; LA32-NEXT: addi.w $a4, $a2, -32
; LA32-NEXT: slti $a5, $a4, 0
; LA32-NEXT: maskeqz $a3, $a3, $a5
; LA32-NEXT: srl.w $a1, $a1, $a4
; LA32-NEXT: masknez $a1, $a1, $a5
; LA32-NEXT: or $a1, $a3, $a1
; LA32-NEXT: sub.w $a3, $zero, $a2
; LA32-NEXT: sll.w $a0, $a0, $a3
; LA32-NEXT: ori $a3, $zero, 32
; LA32-NEXT: sub.w $a2, $a3, $a2
; LA32-NEXT: srai.w $a2, $a2, 31
; LA32-NEXT: and $a0, $a2, $a0
; LA32-NEXT: or $a0, $a1, $a0
; LA32-NEXT: ret
;
; LA64-LABEL: rotr_64_trunc_32:
; LA64: # %bb.0:
; LA64-NEXT: rotr.d $a0, $a0, $a1
; LA64-NEXT: addi.w $a0, $a0, 0
; LA64-NEXT: ret
%z = sub i64 64, %y
%b = lshr i64 %x, %y
%c = shl i64 %x, %z
%d = or i64 %b, %c
%e = trunc i64 %d to i32
ret i32 %e
}

define signext i32 @rotri_i32(i32 signext %a) nounwind {
; LA32-LABEL: rotri_i32:
; LA32: # %bb.0:
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