1 ; RUN: llc -march=x86-64 < %s > /dev/null 2 3 ; ScalarEvolution misses an opportunity to fold ((trunc x) + (trunc -x) + y), 4 ; but LSR should tolerate this. 5 ; rdar://7886751 6 7 target 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" 8 target triple = "x86_64-apple-darwin11.0" 9 10 define fastcc void @formatValue(i64 %arg5) nounwind { 11 bb12: ; preds = %bb11 12 %t = trunc i64 %arg5 to i32 ; <i32> [#uses=1] 13 %t13 = sub i64 0, %arg5 ; <i64> [#uses=1] 14 %t14 = and i64 %t13, 4294967295 ; <i64> [#uses=1] 15 br label %bb15 16 17 bb15: ; preds = %bb21, %bb12 18 %t16 = phi i64 [ 0, %bb12 ], [ %t23, %bb15 ] ; <i64> [#uses=2] 19 %t17 = mul i64 %t14, %t16 ; <i64> [#uses=1] 20 %t18 = add i64 undef, %t17 ; <i64> [#uses=1] 21 %t19 = trunc i64 %t18 to i32 ; <i32> [#uses=1] 22 %t22 = icmp eq i32 %t19, %t ; <i1> [#uses=1] 23 %t23 = add i64 %t16, 1 ; <i64> [#uses=1] 24 br i1 %t22, label %bb24, label %bb15 25 26 bb24: ; preds = %bb21, %bb11 27 unreachable 28 } 29 30 ; ScalarEvolution should be able to correctly expand the crazy addrec here. 31 ; PR6914 32 33 define void @int323() nounwind { 34 entry: 35 br label %for.cond 36 37 for.cond: ; preds = %lbl_264, %for.inc, %entry 38 %g_263.tmp.1 = phi i8 [ undef, %entry ], [ %g_263.tmp.1, %for.cond ] 39 %p_95.addr.0 = phi i8 [ 0, %entry ], [ %add, %for.cond ] 40 %add = add i8 %p_95.addr.0, 1 ; <i8> [#uses=1] 41 br i1 undef, label %for.cond, label %lbl_264 42 43 lbl_264: ; preds = %if.end, %lbl_264.preheader 44 %g_263.tmp.0 = phi i8 [ %g_263.tmp.1, %for.cond ] ; <i8> [#uses=1] 45 %tmp7 = load i16, i16* undef ; <i16> [#uses=1] 46 %conv8 = trunc i16 %tmp7 to i8 ; <i8> [#uses=1] 47 %mul.i = mul i8 %p_95.addr.0, %p_95.addr.0 ; <i8> [#uses=1] 48 %mul.i18 = mul i8 %mul.i, %conv8 ; <i8> [#uses=1] 49 %tobool12 = icmp eq i8 %mul.i18, 0 ; <i1> [#uses=1] 50 unreachable 51 } 52 53 ; LSR ends up going into conservative pruning mode; don't prune the solution 54 ; so far that it becomes unsolvable though. 55 ; PR7077 56 57 %struct.Bu = type { i32, i32, i32 } 58 59 define void @_Z3fooP2Bui(%struct.Bu* nocapture %bu) { 60 entry: 61 br label %for.body 62 63 for.body: ; preds = %for.inc131, %entry 64 %indvar = phi i64 [ %indvar.next, %for.inc131 ], [ 0, %entry ] ; <i64> [#uses=3] 65 br i1 undef, label %for.inc131, label %lor.lhs.false 66 67 lor.lhs.false: ; preds = %for.body 68 %tmp15 = add i64 %indvar, 1 ; <i64> [#uses=1] 69 %tmp17 = add i64 %indvar, 2 ; <i64> [#uses=1] 70 %tmp19 = add i64 %indvar, 3 ; <i64> [#uses=1] 71 %tmp21 = add i64 %indvar, 4 ; <i64> [#uses=1] 72 %tmp23 = add i64 %indvar, 5 ; <i64> [#uses=1] 73 %tmp25 = add i64 %indvar, 6 ; <i64> [#uses=1] 74 %tmp27 = add i64 %indvar, 7 ; <i64> [#uses=1] 75 %tmp29 = add i64 %indvar, 8 ; <i64> [#uses=1] 76 %tmp31 = add i64 %indvar, 9 ; <i64> [#uses=1] 77 %tmp35 = add i64 %indvar, 11 ; <i64> [#uses=1] 78 %tmp37 = add i64 %indvar, 12 ; <i64> [#uses=1] 79 %tmp39 = add i64 %indvar, 13 ; <i64> [#uses=1] 80 %tmp41 = add i64 %indvar, 14 ; <i64> [#uses=1] 81 %tmp43 = add i64 %indvar, 15 ; <i64> [#uses=1] 82 %tmp45 = add i64 %indvar, 16 ; <i64> [#uses=1] 83 %tmp47 = add i64 %indvar, 17 ; <i64> [#uses=1] 84 %mul = trunc i64 %indvar to i32 ; <i32> [#uses=1] 85 %add22 = trunc i64 %tmp15 to i32 ; <i32> [#uses=1] 86 %add28 = trunc i64 %tmp17 to i32 ; <i32> [#uses=1] 87 %add34 = trunc i64 %tmp19 to i32 ; <i32> [#uses=1] 88 %add40 = trunc i64 %tmp21 to i32 ; <i32> [#uses=1] 89 %add46 = trunc i64 %tmp23 to i32 ; <i32> [#uses=1] 90 %add52 = trunc i64 %tmp25 to i32 ; <i32> [#uses=1] 91 %add58 = trunc i64 %tmp27 to i32 ; <i32> [#uses=1] 92 %add64 = trunc i64 %tmp29 to i32 ; <i32> [#uses=1] 93 %add70 = trunc i64 %tmp31 to i32 ; <i32> [#uses=1] 94 %add82 = trunc i64 %tmp35 to i32 ; <i32> [#uses=1] 95 %add88 = trunc i64 %tmp37 to i32 ; <i32> [#uses=1] 96 %add94 = trunc i64 %tmp39 to i32 ; <i32> [#uses=1] 97 %add100 = trunc i64 %tmp41 to i32 ; <i32> [#uses=1] 98 %add106 = trunc i64 %tmp43 to i32 ; <i32> [#uses=1] 99 %add112 = trunc i64 %tmp45 to i32 ; <i32> [#uses=1] 100 %add118 = trunc i64 %tmp47 to i32 ; <i32> [#uses=1] 101 %tmp10 = getelementptr %struct.Bu, %struct.Bu* %bu, i64 %indvar, i32 2 ; <i32*> [#uses=1] 102 %tmp11 = load i32, i32* %tmp10 ; <i32> [#uses=0] 103 tail call void undef(i32 %add22) 104 tail call void undef(i32 %add28) 105 tail call void undef(i32 %add34) 106 tail call void undef(i32 %add40) 107 tail call void undef(i32 %add46) 108 tail call void undef(i32 %add52) 109 tail call void undef(i32 %add58) 110 tail call void undef(i32 %add64) 111 tail call void undef(i32 %add70) 112 tail call void undef(i32 %add82) 113 tail call void undef(i32 %add88) 114 tail call void undef(i32 %add94) 115 tail call void undef(i32 %add100) 116 tail call void undef(i32 %add106) 117 tail call void undef(i32 %add112) 118 tail call void undef(i32 %add118) 119 br label %for.body123 120 121 for.body123: ; preds = %for.body123, %lor.lhs.false 122 %j.03 = phi i32 [ 0, %lor.lhs.false ], [ %inc, %for.body123 ] ; <i32> [#uses=2] 123 %add129 = add i32 %mul, %j.03 ; <i32> [#uses=1] 124 tail call void undef(i32 %add129) 125 %inc = add nsw i32 %j.03, 1 ; <i32> [#uses=1] 126 br i1 undef, label %for.inc131, label %for.body123 127 128 for.inc131: ; preds = %for.body123, %for.body 129 %indvar.next = add i64 %indvar, 1 ; <i64> [#uses=1] 130 br i1 undef, label %for.end134, label %for.body 131 132 for.end134: ; preds = %for.inc131 133 ret void 134 } 135 136 ; LSR needs to remember inserted instructions even in postinc mode, because 137 ; there could be multiple subexpressions within a single expansion which 138 ; require insert point adjustment. 139 ; PR7306 140 141 define fastcc i32 @GetOptimum() nounwind { 142 bb: 143 br label %bb1 144 145 bb1: ; preds = %bb1, %bb 146 %t = phi i32 [ 0, %bb ], [ %t2, %bb1 ] ; <i32> [#uses=1] 147 %t2 = add i32 %t, undef ; <i32> [#uses=3] 148 br i1 undef, label %bb1, label %bb3 149 150 bb3: ; preds = %bb1 151 %t4 = add i32 undef, -1 ; <i32> [#uses=1] 152 br label %bb5 153 154 bb5: ; preds = %bb16, %bb3 155 %t6 = phi i32 [ %t17, %bb16 ], [ 0, %bb3 ] ; <i32> [#uses=3] 156 %t7 = add i32 undef, %t6 ; <i32> [#uses=2] 157 %t8 = add i32 %t4, %t6 ; <i32> [#uses=1] 158 br i1 undef, label %bb9, label %bb10 159 160 bb9: ; preds = %bb5 161 br label %bb10 162 163 bb10: ; preds = %bb9, %bb5 164 br i1 undef, label %bb11, label %bb16 165 166 bb11: ; preds = %bb10 167 %t12 = icmp ugt i32 %t7, %t2 ; <i1> [#uses=1] 168 %t13 = select i1 %t12, i32 %t2, i32 %t7 ; <i32> [#uses=1] 169 br label %bb14 170 171 bb14: ; preds = %bb11 172 store i32 %t13, i32* null 173 ret i32 %t8 174 175 bb16: ; preds = %bb10 176 %t17 = add i32 %t6, 1 ; <i32> [#uses=1] 177 br label %bb5 178 } 179
