108 lines
5.5 KiB
LLVM
108 lines
5.5 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -mtriple=thumbv8.1m.main-none-none-eabi -mattr=+mve.fp < %s -codegenprepare -S | FileCheck -check-prefix=CHECK %s
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; Sink the shufflevector/insertelement pair, followed by the trunc. The sunk instruction end up dead.
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define signext i8 @dead(i16* noalias nocapture readonly %s1, i16 zeroext %x, i8* noalias nocapture %d, i32 %n) {
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; CHECK-LABEL: @dead(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[N_VEC:%.*]] = and i32 [[N:%.*]], -8
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; CHECK-NEXT: br label [[VECTOR_BODY:%.*]]
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; CHECK: vector.body:
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; CHECK-NEXT: [[INDEX:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
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; CHECK-NEXT: [[TMP0:%.*]] = trunc i16 [[X:%.*]] to i8
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; CHECK-NEXT: [[L6:%.*]] = getelementptr inbounds i16, i16* [[S1:%.*]], i32 [[INDEX]]
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; CHECK-NEXT: [[L7:%.*]] = bitcast i16* [[L6]] to <8 x i16>*
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; CHECK-NEXT: [[WIDE_LOAD:%.*]] = load <8 x i16>, <8 x i16>* [[L7]], align 2
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; CHECK-NEXT: [[L8:%.*]] = trunc <8 x i16> [[WIDE_LOAD]] to <8 x i8>
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; CHECK-NEXT: [[TMP1:%.*]] = insertelement <8 x i8> undef, i8 [[TMP0]], i32 0
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; CHECK-NEXT: [[TMP2:%.*]] = shufflevector <8 x i8> [[TMP1]], <8 x i8> undef, <8 x i32> zeroinitializer
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; CHECK-NEXT: [[L9:%.*]] = mul <8 x i8> [[TMP2]], [[L8]]
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; CHECK-NEXT: [[L13:%.*]] = getelementptr inbounds i8, i8* [[D:%.*]], i32 [[INDEX]]
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; CHECK-NEXT: [[L14:%.*]] = bitcast i8* [[L13]] to <8 x i8>*
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; CHECK-NEXT: store <8 x i8> [[L9]], <8 x i8>* [[L14]], align 1
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; CHECK-NEXT: [[INDEX_NEXT]] = add i32 [[INDEX]], 8
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; CHECK-NEXT: [[L15:%.*]] = icmp eq i32 [[INDEX_NEXT]], [[N_VEC]]
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; CHECK-NEXT: br i1 [[L15]], label [[EXIT:%.*]], label [[VECTOR_BODY]]
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; CHECK: exit:
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; CHECK-NEXT: ret i8 0
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;
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entry:
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%n.vec = and i32 %n, -8
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%l0 = trunc i16 %x to i8
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%l1 = insertelement <8 x i8> undef, i8 %l0, i32 0
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%broadcast.splat26 = shufflevector <8 x i8> %l1, <8 x i8> undef, <8 x i32> zeroinitializer
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br label %vector.body
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vector.body: ; preds = %vector.body, %entry
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%index = phi i32 [ 0, %entry ], [ %index.next, %vector.body ]
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%l6 = getelementptr inbounds i16, i16* %s1, i32 %index
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%l7 = bitcast i16* %l6 to <8 x i16>*
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%wide.load = load <8 x i16>, <8 x i16>* %l7, align 2
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%l8 = trunc <8 x i16> %wide.load to <8 x i8>
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%l9 = mul <8 x i8> %broadcast.splat26, %l8
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%l13 = getelementptr inbounds i8, i8* %d, i32 %index
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%l14 = bitcast i8* %l13 to <8 x i8>*
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store <8 x i8> %l9, <8 x i8>* %l14, align 1
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%index.next = add i32 %index, 8
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%l15 = icmp eq i32 %index.next, %n.vec
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br i1 %l15, label %exit, label %vector.body
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exit: ; preds = %vector.body
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ret i8 0
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}
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; Same as above, but the shuffle has an extra use meaning it shouldnt be deleted
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define signext i8 @alive(i16* noalias nocapture readonly %s1, i16 zeroext %x, i8* noalias nocapture %d, i32 %n) {
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; CHECK-LABEL: @alive(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[N_VEC:%.*]] = and i32 [[N:%.*]], -8
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; CHECK-NEXT: [[L0:%.*]] = trunc i16 [[X:%.*]] to i8
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; CHECK-NEXT: [[L1:%.*]] = insertelement <8 x i8> undef, i8 [[L0]], i32 0
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; CHECK-NEXT: [[BROADCAST_SPLAT26:%.*]] = shufflevector <8 x i8> [[L1]], <8 x i8> undef, <8 x i32> zeroinitializer
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; CHECK-NEXT: [[L2:%.*]] = sub <8 x i8> zeroinitializer, [[BROADCAST_SPLAT26]]
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; CHECK-NEXT: br label [[VECTOR_BODY:%.*]]
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; CHECK: vector.body:
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; CHECK-NEXT: [[INDEX:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
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; CHECK-NEXT: [[TMP0:%.*]] = trunc i16 [[X]] to i8
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; CHECK-NEXT: [[L6:%.*]] = getelementptr inbounds i16, i16* [[S1:%.*]], i32 [[INDEX]]
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; CHECK-NEXT: [[L7:%.*]] = bitcast i16* [[L6]] to <8 x i16>*
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; CHECK-NEXT: [[WIDE_LOAD:%.*]] = load <8 x i16>, <8 x i16>* [[L7]], align 2
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; CHECK-NEXT: [[L8:%.*]] = trunc <8 x i16> [[WIDE_LOAD]] to <8 x i8>
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; CHECK-NEXT: [[TMP1:%.*]] = insertelement <8 x i8> undef, i8 [[TMP0]], i32 0
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; CHECK-NEXT: [[TMP2:%.*]] = shufflevector <8 x i8> [[TMP1]], <8 x i8> undef, <8 x i32> zeroinitializer
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; CHECK-NEXT: [[L9:%.*]] = mul <8 x i8> [[TMP2]], [[L8]]
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; CHECK-NEXT: [[L13:%.*]] = getelementptr inbounds i8, i8* [[D:%.*]], i32 [[INDEX]]
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; CHECK-NEXT: [[L14:%.*]] = bitcast i8* [[L13]] to <8 x i8>*
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; CHECK-NEXT: store <8 x i8> [[L9]], <8 x i8>* [[L14]], align 1
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; CHECK-NEXT: [[INDEX_NEXT]] = add i32 [[INDEX]], 8
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; CHECK-NEXT: [[L15:%.*]] = icmp eq i32 [[INDEX_NEXT]], [[N_VEC]]
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; CHECK-NEXT: br i1 [[L15]], label [[EXIT:%.*]], label [[VECTOR_BODY]]
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; CHECK: exit:
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; CHECK-NEXT: ret i8 0
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;
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entry:
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%n.vec = and i32 %n, -8
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%l0 = trunc i16 %x to i8
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%l1 = insertelement <8 x i8> undef, i8 %l0, i32 0
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%broadcast.splat26 = shufflevector <8 x i8> %l1, <8 x i8> undef, <8 x i32> zeroinitializer
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%l2 = sub <8 x i8> zeroinitializer, %broadcast.splat26
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br label %vector.body
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vector.body: ; preds = %vector.body, %entry
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%index = phi i32 [ 0, %entry ], [ %index.next, %vector.body ]
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%l6 = getelementptr inbounds i16, i16* %s1, i32 %index
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%l7 = bitcast i16* %l6 to <8 x i16>*
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%wide.load = load <8 x i16>, <8 x i16>* %l7, align 2
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%l8 = trunc <8 x i16> %wide.load to <8 x i8>
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%l9 = mul <8 x i8> %broadcast.splat26, %l8
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%l13 = getelementptr inbounds i8, i8* %d, i32 %index
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%l14 = bitcast i8* %l13 to <8 x i8>*
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store <8 x i8> %l9, <8 x i8>* %l14, align 1
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%index.next = add i32 %index, 8
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%l15 = icmp eq i32 %index.next, %n.vec
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br i1 %l15, label %exit, label %vector.body
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exit: ; preds = %vector.body
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ret i8 0
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}
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