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55 lines
2.9 KiB
55 lines
2.9 KiB
4 months ago
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; RUN: opt -mtriple=thumbv8.1m.main -mve-tail-predication -tail-predication=enabled -mattr=+mve,+lob %s -S -o - | FileCheck %s
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; TODO: We should be able to generate a vctp for the loads.
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; CHECK-LABEL: trunc_v4i32_v4i16
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; CHECK-NOT: vcpt
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define void @trunc_v4i32_v4i16(i32* readonly %a, i32* readonly %b, i16* %c, i32 %N) {
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entry:
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%cmp8 = icmp eq i32 %N, 0
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%tmp8 = add i32 %N, 3
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%tmp9 = lshr i32 %tmp8, 2
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%tmp10 = shl nuw i32 %tmp9, 2
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%tmp11 = add i32 %tmp10, -4
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%tmp12 = lshr i32 %tmp11, 2
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%tmp13 = add nuw nsw i32 %tmp12, 1
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br i1 %cmp8, label %for.cond.cleanup, label %vector.ph
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vector.ph: ; preds = %entry
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%trip.count.minus.1 = add i32 %N, -1
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%broadcast.splatinsert10 = insertelement <4 x i32> undef, i32 %trip.count.minus.1, i32 0
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%broadcast.splat11 = shufflevector <4 x i32> %broadcast.splatinsert10, <4 x i32> undef, <4 x i32> zeroinitializer
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%start = call i32 @llvm.start.loop.iterations.i32(i32 %tmp13)
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br label %vector.body
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vector.body: ; preds = %vector.body, %vector.ph
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%index = phi i32 [ 0, %vector.ph ], [ %index.next, %vector.body ]
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%tmp14 = phi i32 [ %start, %vector.ph ], [ %tmp15, %vector.body ]
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%broadcast.splatinsert = insertelement <4 x i32> undef, i32 %index, i32 0
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%broadcast.splat = shufflevector <4 x i32> %broadcast.splatinsert, <4 x i32> undef, <4 x i32> zeroinitializer
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%induction = add <4 x i32> %broadcast.splat, <i32 0, i32 1, i32 2, i32 3>
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%tmp = getelementptr inbounds i32, i32* %a, i32 %index
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%tmp1 = icmp ule <4 x i32> %induction, %broadcast.splat11
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%tmp2 = bitcast i32* %tmp to <4 x i32>*
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%wide.masked.load = tail call <4 x i32> @llvm.masked.load.v4i32.p0v4i32(<4 x i32>* %tmp2, i32 4, <4 x i1> %tmp1, <4 x i32> undef)
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%tmp3 = getelementptr inbounds i32, i32* %b, i32 %index
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%tmp4 = bitcast i32* %tmp3 to <4 x i32>*
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%wide.masked.load2 = tail call <4 x i32> @llvm.masked.load.v4i32.p0v4i32(<4 x i32>* %tmp4, i32 4, <4 x i1> %tmp1, <4 x i32> undef)
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%mul = mul nsw <4 x i32> %wide.masked.load2, %wide.masked.load
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%trunc = trunc <4 x i32> %mul to <4 x i16>
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%tmp6 = getelementptr inbounds i16, i16* %c, i32 %index
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%tmp7 = bitcast i16* %tmp6 to <4 x i16>*
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tail call void @llvm.masked.store.v4i16.p0v4i16(<4 x i16> %trunc, <4 x i16>* %tmp7, i32 4, <4 x i1> %tmp1)
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%index.next = add i32 %index, 4
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%tmp15 = call i32 @llvm.loop.decrement.reg.i32.i32.i32(i32 %tmp14, i32 1)
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%tmp16 = icmp ne i32 %tmp15, 0
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br i1 %tmp16, label %vector.body, label %for.cond.cleanup
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for.cond.cleanup: ; preds = %vector.body, %entry
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ret void
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}
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declare <4 x i32> @llvm.masked.load.v4i32.p0v4i32(<4 x i32>*, i32 immarg, <4 x i1>, <4 x i32>)
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declare void @llvm.masked.store.v4i16.p0v4i16(<4 x i16>, <4 x i16>*, i32 immarg, <4 x i1>)
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declare i32 @llvm.start.loop.iterations.i32(i32)
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declare i32 @llvm.loop.decrement.reg.i32.i32.i32(i32, i32)
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