1; RUN: opt < %s -loop-vectorize -force-vector-unroll=1 -force-vector-width=4 -dce -instcombine -S | FileCheck %s 2 3target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128" 4target triple = "x86_64-apple-macosx10.8.0" 5 6@b = common global [2048 x i32] zeroinitializer, align 16 7@c = common global [2048 x i32] zeroinitializer, align 16 8@a = common global [2048 x i32] zeroinitializer, align 16 9@G = common global [32 x [1024 x i32]] zeroinitializer, align 16 10@ub = common global [1024 x i32] zeroinitializer, align 16 11@uc = common global [1024 x i32] zeroinitializer, align 16 12@d = common global [2048 x i32] zeroinitializer, align 16 13@fa = common global [1024 x float] zeroinitializer, align 16 14@fb = common global [1024 x float] zeroinitializer, align 16 15@ic = common global [1024 x i32] zeroinitializer, align 16 16@da = common global [1024 x float] zeroinitializer, align 16 17@db = common global [1024 x float] zeroinitializer, align 16 18@dc = common global [1024 x float] zeroinitializer, align 16 19@dd = common global [1024 x float] zeroinitializer, align 16 20@dj = common global [1024 x i32] zeroinitializer, align 16 21 22; We can optimize this test without a tail. 23;CHECK-LABEL: @example1( 24;CHECK: load <4 x i32> 25;CHECK: add nsw <4 x i32> 26;CHECK: store <4 x i32> 27;CHECK: ret void 28define void @example1() optsize { 29 br label %1 30 31; <label>:1 ; preds = %1, %0 32 %indvars.iv = phi i64 [ 0, %0 ], [ %indvars.iv.next, %1 ] 33 %2 = getelementptr inbounds [2048 x i32]* @b, i64 0, i64 %indvars.iv 34 %3 = load i32* %2, align 4 35 %4 = getelementptr inbounds [2048 x i32]* @c, i64 0, i64 %indvars.iv 36 %5 = load i32* %4, align 4 37 %6 = add nsw i32 %5, %3 38 %7 = getelementptr inbounds [2048 x i32]* @a, i64 0, i64 %indvars.iv 39 store i32 %6, i32* %7, align 4 40 %indvars.iv.next = add i64 %indvars.iv, 1 41 %lftr.wideiv = trunc i64 %indvars.iv.next to i32 42 %exitcond = icmp eq i32 %lftr.wideiv, 256 43 br i1 %exitcond, label %8, label %1 44 45; <label>:8 ; preds = %1 46 ret void 47} 48 49; Can't vectorize in 'optsize' mode because we need a tail. 50;CHECK-LABEL: @example2( 51;CHECK-NOT: store <4 x i32> 52;CHECK: ret void 53define void @example2(i32 %n, i32 %x) optsize { 54 %1 = icmp sgt i32 %n, 0 55 br i1 %1, label %.lr.ph5, label %.preheader 56 57..preheader_crit_edge: ; preds = %.lr.ph5 58 %phitmp = sext i32 %n to i64 59 br label %.preheader 60 61.preheader: ; preds = %..preheader_crit_edge, %0 62 %i.0.lcssa = phi i64 [ %phitmp, %..preheader_crit_edge ], [ 0, %0 ] 63 %2 = icmp eq i32 %n, 0 64 br i1 %2, label %._crit_edge, label %.lr.ph 65 66.lr.ph5: ; preds = %0, %.lr.ph5 67 %indvars.iv6 = phi i64 [ %indvars.iv.next7, %.lr.ph5 ], [ 0, %0 ] 68 %3 = getelementptr inbounds [2048 x i32]* @b, i64 0, i64 %indvars.iv6 69 store i32 %x, i32* %3, align 4 70 %indvars.iv.next7 = add i64 %indvars.iv6, 1 71 %lftr.wideiv = trunc i64 %indvars.iv.next7 to i32 72 %exitcond = icmp eq i32 %lftr.wideiv, %n 73 br i1 %exitcond, label %..preheader_crit_edge, label %.lr.ph5 74 75.lr.ph: ; preds = %.preheader, %.lr.ph 76 %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ %i.0.lcssa, %.preheader ] 77 %.02 = phi i32 [ %4, %.lr.ph ], [ %n, %.preheader ] 78 %4 = add nsw i32 %.02, -1 79 %5 = getelementptr inbounds [2048 x i32]* @b, i64 0, i64 %indvars.iv 80 %6 = load i32* %5, align 4 81 %7 = getelementptr inbounds [2048 x i32]* @c, i64 0, i64 %indvars.iv 82 %8 = load i32* %7, align 4 83 %9 = and i32 %8, %6 84 %10 = getelementptr inbounds [2048 x i32]* @a, i64 0, i64 %indvars.iv 85 store i32 %9, i32* %10, align 4 86 %indvars.iv.next = add i64 %indvars.iv, 1 87 %11 = icmp eq i32 %4, 0 88 br i1 %11, label %._crit_edge, label %.lr.ph 89 90._crit_edge: ; preds = %.lr.ph, %.preheader 91 ret void 92} 93 94; N is unknown, we need a tail. Can't vectorize. 95;CHECK-LABEL: @example3( 96;CHECK-NOT: <4 x i32> 97;CHECK: ret void 98define void @example3(i32 %n, i32* noalias nocapture %p, i32* noalias nocapture %q) optsize { 99 %1 = icmp eq i32 %n, 0 100 br i1 %1, label %._crit_edge, label %.lr.ph 101 102.lr.ph: ; preds = %0, %.lr.ph 103 %.05 = phi i32 [ %2, %.lr.ph ], [ %n, %0 ] 104 %.014 = phi i32* [ %5, %.lr.ph ], [ %p, %0 ] 105 %.023 = phi i32* [ %3, %.lr.ph ], [ %q, %0 ] 106 %2 = add nsw i32 %.05, -1 107 %3 = getelementptr inbounds i32* %.023, i64 1 108 %4 = load i32* %.023, align 16 109 %5 = getelementptr inbounds i32* %.014, i64 1 110 store i32 %4, i32* %.014, align 16 111 %6 = icmp eq i32 %2, 0 112 br i1 %6, label %._crit_edge, label %.lr.ph 113 114._crit_edge: ; preds = %.lr.ph, %0 115 ret void 116} 117 118 119; We can't vectorize this one because we need a runtime ptr check. 120;CHECK-LABEL: @example23( 121;CHECK-NOT: <4 x i32> 122;CHECK: ret void 123define void @example23(i16* nocapture %src, i32* nocapture %dst) optsize { 124 br label %1 125 126; <label>:1 ; preds = %1, %0 127 %.04 = phi i16* [ %src, %0 ], [ %2, %1 ] 128 %.013 = phi i32* [ %dst, %0 ], [ %6, %1 ] 129 %i.02 = phi i32 [ 0, %0 ], [ %7, %1 ] 130 %2 = getelementptr inbounds i16* %.04, i64 1 131 %3 = load i16* %.04, align 2 132 %4 = zext i16 %3 to i32 133 %5 = shl nuw nsw i32 %4, 7 134 %6 = getelementptr inbounds i32* %.013, i64 1 135 store i32 %5, i32* %.013, align 4 136 %7 = add nsw i32 %i.02, 1 137 %exitcond = icmp eq i32 %7, 256 138 br i1 %exitcond, label %8, label %1 139 140; <label>:8 ; preds = %1 141 ret void 142} 143 144 145; We CAN vectorize this example because the pointers are marked as noalias. 146;CHECK-LABEL: @example23b( 147;CHECK: <4 x i32> 148;CHECK: ret void 149define void @example23b(i16* noalias nocapture %src, i32* noalias nocapture %dst) optsize { 150 br label %1 151 152; <label>:1 ; preds = %1, %0 153 %.04 = phi i16* [ %src, %0 ], [ %2, %1 ] 154 %.013 = phi i32* [ %dst, %0 ], [ %6, %1 ] 155 %i.02 = phi i32 [ 0, %0 ], [ %7, %1 ] 156 %2 = getelementptr inbounds i16* %.04, i64 1 157 %3 = load i16* %.04, align 2 158 %4 = zext i16 %3 to i32 159 %5 = shl nuw nsw i32 %4, 7 160 %6 = getelementptr inbounds i32* %.013, i64 1 161 store i32 %5, i32* %.013, align 4 162 %7 = add nsw i32 %i.02, 1 163 %exitcond = icmp eq i32 %7, 256 164 br i1 %exitcond, label %8, label %1 165 166; <label>:8 ; preds = %1 167 ret void 168} 169 170 171