1 ; RUN: opt < %s -analyze -basicaa -globals-aa -da | FileCheck %s 2 define void @i32_subscript(i32* %a) { 3 entry: 4 br label %for.body 5 6 for.body: 7 %i = phi i32 [ 0, %entry ], [ %i.inc, %for.body ] 8 %a.addr = getelementptr i32, i32* %a, i32 %i 9 %a.addr.2 = getelementptr i32, i32* %a, i32 5 10 %0 = load i32, i32* %a.addr, align 4 11 %1 = add i32 %0, 1 12 store i32 %1, i32* %a.addr.2, align 4 13 %i.inc = add nsw i32 %i, 1 14 %i.inc.ext = sext i32 %i to i64 15 %exitcond = icmp ne i64 %i.inc.ext, 100 16 br i1 %exitcond, label %for.body, label %for.end 17 18 for.end: 19 ret void 20 } 21 ; CHECK: none 22 ; CHECK: anti 23 ; CHECK: output 24 25 26 ; Test for a bug, which caused an assert in ScalarEvolution because 27 ; the Dependence Analyzer attempted to zero extend a type to a smaller 28 ; type. 29 30 ; void t(unsigned int *a, unsigned int n) { 31 ; for (unsigned int i = 0; i != n; i++) { 32 ; a[(unsigned short)i] = g; 33 ; }} 34 35 @g = common global i32 0, align 4 36 37 define void @t(i32* noalias %a, i32 %n) nounwind { 38 entry: 39 %cmp1 = icmp eq i32 %n, 0 40 br i1 %cmp1, label %for.end, label %for.body 41 42 for.body: 43 %i.02 = phi i32 [ %inc, %for.body ], [ 0, %entry ] 44 %0 = load i32, i32* @g, align 4 45 %idxprom = and i32 %i.02, 65535 46 %arrayidx = getelementptr inbounds i32, i32* %a, i32 %idxprom 47 store i32 %0, i32* %arrayidx, align 4 48 %inc = add i32 %i.02, 1 49 %cmp = icmp eq i32 %inc, %n 50 br i1 %cmp, label %for.end, label %for.body 51 52 for.end: 53 ret void 54 } 55 ; CHECK: input 56 ; CHECK: none 57 ; CHECK: output 58 59 define void @i16_wrap(i64* %a) { 60 entry: 61 br label %for.body 62 for.body: 63 %i = phi i64 [0, %entry], [%i.inc, %for.inc] 64 %i.tr = trunc i64 %i to i16 65 %idx = getelementptr i64, i64* %a, i16 %i.tr 66 %0 = load i64, i64* %idx 67 %1 = add i64 %0, 1 68 store i64 %1, i64* %idx 69 br label %for.inc 70 71 for.inc: 72 %i.inc = add nuw i64 %i, 1 73 %cmp = icmp ult i64 %i.inc, 17179869184 74 br i1 %cmp, label %for.body, label %for.end 75 for.end: 76 ret void 77 } 78 ; CHECK: input 79 ; CHECK: anti 80 ; CHECK: output 81 82 define void @i8_stride_wrap(i32* noalias %a, i32* noalias %b) { 83 entry: 84 br label %for.body 85 for.body: 86 %i = phi i32 [1,%entry], [%i.inc, %for.inc] 87 %i.tr = trunc i32 %i to i8 88 %idx = getelementptr i32, i32* %a, i8 %i.tr 89 %idx.2 = getelementptr i32, i32* %b, i32 %i 90 %0 = load i32, i32* %idx, align 4 91 %1 = add i32 %0, 1 92 store i32 %1, i32* %idx.2, align 4 93 br label %for.inc 94 95 for.inc: 96 %i.inc = add nsw i32 %i, 256 97 %exitcond = icmp ult i32 %i, 65536 98 br i1 %exitcond, label %for.body, label %for.end 99 100 for.end: 101 ret void 102 } 103 ; CHECK: input 104 ; CHECK: none 105 ; CHECK: none 106
