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[LoongArch] Optimize inserting bitcasted integer element or bitcasting extracted fp element #147043

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[LoongArch] Optimize inserting bitcasted integer element or bitcasting extracted fp element #147043

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958d496
[LoongArch] Optimize inserting fp element bitconverted from integer
zhaoqi5 Jul 1, 2025
6c15292
[LoongArch] Optimize bitcasting vector-extracted fp element to integer
zhaoqi5 Jul 5, 2025
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2 changes: 1 addition & 1 deletion llvm/lib/Target/LoongArch/LoongArchFloat32InstrInfo.td
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Original file line number Diff line number Diff line change
Expand Up @@ -6,7 +6,7 @@
//
//===----------------------------------------------------------------------===//
//
// This file describes the baisc single-precision floating-point instructions.
// This file describes the basic single-precision floating-point instructions.
//
//===----------------------------------------------------------------------===//

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11 changes: 10 additions & 1 deletion llvm/lib/Target/LoongArch/LoongArchLASXInstrInfo.td
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Expand Up @@ -1593,7 +1593,10 @@ def : Pat<(vector_insert v8i32:$xd, GRLenVT:$rj, uimm3:$imm),
(XVINSGR2VR_W v8i32:$xd, GRLenVT:$rj, uimm3:$imm)>;
def : Pat<(vector_insert v4i64:$xd, GRLenVT:$rj, uimm2:$imm),
(XVINSGR2VR_D v4i64:$xd, GRLenVT:$rj, uimm2:$imm)>;

def : Pat<(vector_insert v8f32:$vd, (loongarch_movgr2fr_w_la64 GPR:$rj), uimm3:$imm),
(XVINSGR2VR_W $vd, $rj, uimm3:$imm)>;
def : Pat<(vector_insert v4f64:$vd, (f64 (bitconvert i64:$rj)), uimm2:$imm),
(XVINSGR2VR_D $vd, $rj, uimm2:$imm)>;
def : Pat<(vector_insert v8f32:$vd, FPR32:$fj, uimm3:$imm),
(XVINSGR2VR_W $vd, (COPY_TO_REGCLASS FPR32:$fj, GPR), uimm3:$imm)>;
def : Pat<(vector_insert v4f64:$vd, FPR64:$fj, uimm2:$imm),
Expand Down Expand Up @@ -1790,6 +1793,12 @@ foreach vt = [v32i8, v16i16, v8i32, v4i64, v8f32, v4f64] in {
def : RegRegStPat<store, XVSTX, LASX256, vt>;
}

// Bitcast float/double element extracted from vector to integer.
def : Pat<(loongarch_movfr2gr_s_la64 (f32 (vector_extract v8f32:$xj, uimm3:$imm))),
(XVPICKVE2GR_W v8f32:$xj, uimm3:$imm)>;
def : Pat<(i64 (bitconvert (f64 (vector_extract v4f64:$xj, uimm2:$imm)))),
(XVPICKVE2GR_D v4f64:$xj, uimm2:$imm)>;

// Vector extraction with constant index.
def : Pat<(i64 (vector_extract v32i8:$xj, uimm4:$imm)),
(VPICKVE2GR_B (EXTRACT_SUBREG v32i8:$xj, sub_128), uimm4:$imm)>;
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11 changes: 10 additions & 1 deletion llvm/lib/Target/LoongArch/LoongArchLSXInstrInfo.td
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Expand Up @@ -1791,7 +1791,10 @@ def : Pat<(vector_insert v4i32:$vd, GRLenVT:$rj, uimm2:$imm),
(VINSGR2VR_W v4i32:$vd, GRLenVT:$rj, uimm2:$imm)>;
def : Pat<(vector_insert v2i64:$vd, GRLenVT:$rj, uimm1:$imm),
(VINSGR2VR_D v2i64:$vd, GRLenVT:$rj, uimm1:$imm)>;

def : Pat<(vector_insert v4f32:$vd, (loongarch_movgr2fr_w_la64 GPR:$rj), uimm2:$imm),
(VINSGR2VR_W $vd, $rj, uimm2:$imm)>;
def : Pat<(vector_insert v2f64:$vd, (f64 (bitconvert i64:$rj)), uimm1:$imm),
(VINSGR2VR_D $vd, $rj, uimm1:$imm)>;
def : Pat<(vector_insert v4f32:$vd, FPR32:$fj, uimm2:$imm),
(VINSGR2VR_W $vd, (COPY_TO_REGCLASS FPR32:$fj, GPR), uimm2:$imm)>;
def : Pat<(vector_insert v2f64:$vd, FPR64:$fj, uimm1:$imm),
Expand Down Expand Up @@ -1990,6 +1993,12 @@ foreach vt = [v16i8, v8i16, v4i32, v2i64, v4f32, v2f64] in {
def : RegRegStPat<store, VSTX, LSX128, vt>;
}

// Bitcast float/double element extracted from vector to integer.
def : Pat<(loongarch_movfr2gr_s_la64 (f32 (vector_extract v4f32:$vj, uimm2:$imm))),
(VPICKVE2GR_W v4f32:$vj, uimm2:$imm)>;
def : Pat<(i64 (bitconvert (f64 (vector_extract v2f64:$vj, uimm1:$imm)))),
(VPICKVE2GR_D v2f64:$vj, uimm1:$imm)>;

// Vector extraction with constant index.
def : Pat<(i64 (vector_extract v16i8:$vj, uimm4:$imm)),
(VPICKVE2GR_B v16i8:$vj, uimm4:$imm)>;
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4 changes: 0 additions & 4 deletions llvm/test/CodeGen/LoongArch/lasx/ir-instruction/bitcast-extract-element.ll
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Expand Up @@ -5,8 +5,6 @@ define i32 @bitcast_extract_v8f32(<8 x float> %a) nounwind {
; CHECK-LABEL: bitcast_extract_v8f32:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: xvpickve2gr.w $a0, $xr0, 7
; CHECK-NEXT: movgr2fr.w $fa0, $a0
; CHECK-NEXT: movfr2gr.s $a0, $fa0
; CHECK-NEXT: ret
entry:
%b = extractelement <8 x float> %a, i32 7
Expand All @@ -18,8 +16,6 @@ define i64 @bitcast_extract_v4f64(<4 x double> %a) nounwind {
; CHECK-LABEL: bitcast_extract_v4f64:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: xvpickve2gr.d $a0, $xr0, 3
; CHECK-NEXT: movgr2fr.d $fa0, $a0
; CHECK-NEXT: movfr2gr.d $a0, $fa0
; CHECK-NEXT: ret
entry:
%b = extractelement <4 x double> %a, i32 3
Expand Down
4 changes: 0 additions & 4 deletions llvm/test/CodeGen/LoongArch/lasx/ir-instruction/insert-bitcast-element.ll
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Original file line number Diff line number Diff line change
Expand Up @@ -4,8 +4,6 @@
define <8 x float> @insert_bitcast_v8f32(<8 x float> %a, i32 %b) nounwind {
; CHECK-LABEL: insert_bitcast_v8f32:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: movgr2fr.w $fa1, $a0
; CHECK-NEXT: movfr2gr.s $a0, $fa1
; CHECK-NEXT: xvinsgr2vr.w $xr0, $a0, 1
; CHECK-NEXT: ret
entry:
Expand All @@ -17,8 +15,6 @@ entry:
define <4 x double> @insert_bitcast_v4f64(<4 x double> %a, i64 %b) nounwind {
; CHECK-LABEL: insert_bitcast_v4f64:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: movgr2fr.d $fa1, $a0
; CHECK-NEXT: movfr2gr.d $a0, $fa1
; CHECK-NEXT: xvinsgr2vr.d $xr0, $a0, 1
; CHECK-NEXT: ret
entry:
Expand Down
6 changes: 2 additions & 4 deletions llvm/test/CodeGen/LoongArch/lsx/ir-instruction/bitcast-extract-element.ll
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Original file line number Diff line number Diff line change
Expand Up @@ -4,8 +4,7 @@
define i32 @bitcast_extract_v4f32(<4 x float> %a) nounwind {
; CHECK-LABEL: bitcast_extract_v4f32:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: vreplvei.w $vr0, $vr0, 3
; CHECK-NEXT: movfr2gr.s $a0, $fa0
; CHECK-NEXT: vpickve2gr.w $a0, $vr0, 3
; CHECK-NEXT: ret
entry:
%b = extractelement <4 x float> %a, i32 3
Expand All @@ -16,8 +15,7 @@ entry:
define i64 @bitcast_extract_v2f64(<2 x double> %a) nounwind {
; CHECK-LABEL: bitcast_extract_v2f64:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: vreplvei.d $vr0, $vr0, 1
; CHECK-NEXT: movfr2gr.d $a0, $fa0
; CHECK-NEXT: vpickve2gr.d $a0, $vr0, 1
; CHECK-NEXT: ret
entry:
%b = extractelement <2 x double> %a, i32 1
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4 changes: 0 additions & 4 deletions llvm/test/CodeGen/LoongArch/lsx/ir-instruction/insert-bitcast-element.ll
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Original file line number Diff line number Diff line change
Expand Up @@ -4,8 +4,6 @@
define <4 x float> @insert_bitcast_v4f32(<4 x float> %a, i32 %b) nounwind {
; CHECK-LABEL: insert_bitcast_v4f32:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: movgr2fr.w $fa1, $a0
; CHECK-NEXT: movfr2gr.s $a0, $fa1
; CHECK-NEXT: vinsgr2vr.w $vr0, $a0, 1
; CHECK-NEXT: ret
entry:
Expand All @@ -17,8 +15,6 @@ entry:
define <2 x double> @insert_bitcast_v2f64(<2 x double> %a, i64 %b) nounwind {
; CHECK-LABEL: insert_bitcast_v2f64:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: movgr2fr.d $fa1, $a0
; CHECK-NEXT: movfr2gr.d $a0, $fa1
; CHECK-NEXT: vinsgr2vr.d $vr0, $a0, 1
; CHECK-NEXT: ret
entry:
Expand Down
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