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[LoongArch] Add patterns to match cto.w/d when meeting i8/i16 types not+cttz #166124

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[LoongArch] Add patterns to match cto.w/d when meeting i8/i16 types not+cttz #166124

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4 changes: 4 additions & 0 deletions llvm/lib/Target/LoongArch/LoongArchInstrInfo.td
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Original file line number Diff line number Diff line change
Expand Up @@ -1393,6 +1393,8 @@ def : PatGpr<ctlz, CLZ_D>;
def : PatGpr<cttz, CTZ_D>;
def : Pat<(ctlz (not GPR:$rj)), (CLO_D GPR:$rj)>;
def : Pat<(cttz (not GPR:$rj)), (CTO_D GPR:$rj)>;
def : Pat<(cttz (or (not GPR:$rj), 256)), (CTO_D (ANDI GPR:$rj, 255))>;
def : Pat<(cttz (or (not GPR:$rj), 65536)), (CTO_D (BSTRPICK_D GPR:$rj, 15, 0))>;
def : PatGpr<loongarch_clzw, CLZ_W>;
def : PatGpr<loongarch_ctzw, CTZ_W>;
def : Pat<(loongarch_clzw (not GPR:$rj)), (CLO_W GPR:$rj)>;
Expand All @@ -1404,6 +1406,8 @@ def : PatGpr<ctlz, CLZ_W>;
def : PatGpr<cttz, CTZ_W>;
def : Pat<(ctlz (not GPR:$rj)), (CLO_W GPR:$rj)>;
def : Pat<(cttz (not GPR:$rj)), (CTO_W GPR:$rj)>;
def : Pat<(cttz (or (not GPR:$rj), 256)), (CTO_W (ANDI GPR:$rj, 255))>;
def : Pat<(cttz (or (not GPR:$rj), 65536)), (CTO_W (BSTRPICK_W GPR:$rj, 15, 0))>;
} // Predicates = [IsLA32, Has32S]

/// FrameIndex calculations
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20 changes: 8 additions & 12 deletions llvm/test/CodeGen/LoongArch/ctlz-cttz-ctpop.ll
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Expand Up @@ -901,16 +901,14 @@ define i8 @test_not_cttz_i8(i8 %a) nounwind {
;
; LA32S-LABEL: test_not_cttz_i8:
; LA32S: # %bb.0:
; LA32S-NEXT: ori $a1, $zero, 256
; LA32S-NEXT: orn $a0, $a1, $a0
; LA32S-NEXT: ctz.w $a0, $a0
; LA32S-NEXT: andi $a0, $a0, 255
; LA32S-NEXT: cto.w $a0, $a0
; LA32S-NEXT: ret
;
; LA64-LABEL: test_not_cttz_i8:
; LA64: # %bb.0:
; LA64-NEXT: ori $a1, $zero, 256
; LA64-NEXT: orn $a0, $a1, $a0
; LA64-NEXT: ctz.d $a0, $a0
; LA64-NEXT: andi $a0, $a0, 255
; LA64-NEXT: cto.d $a0, $a0
; LA64-NEXT: ret
%neg = xor i8 %a, -1
%tmp = call i8 @llvm.cttz.i8(i8 %neg, i1 false)
Expand Down Expand Up @@ -943,16 +941,14 @@ define i16 @test_not_cttz_i16(i16 %a) nounwind {
;
; LA32S-LABEL: test_not_cttz_i16:
; LA32S: # %bb.0:
; LA32S-NEXT: lu12i.w $a1, 16
; LA32S-NEXT: orn $a0, $a1, $a0
; LA32S-NEXT: ctz.w $a0, $a0
; LA32S-NEXT: bstrpick.w $a0, $a0, 15, 0
; LA32S-NEXT: cto.w $a0, $a0
; LA32S-NEXT: ret
;
; LA64-LABEL: test_not_cttz_i16:
; LA64: # %bb.0:
; LA64-NEXT: lu12i.w $a1, 16
; LA64-NEXT: orn $a0, $a1, $a0
; LA64-NEXT: ctz.d $a0, $a0
; LA64-NEXT: bstrpick.d $a0, $a0, 15, 0
; LA64-NEXT: cto.d $a0, $a0
; LA64-NEXT: ret
%neg = xor i16 %a, -1
%tmp = call i16 @llvm.cttz.i16(i16 %neg, i1 false)
Expand Down