60 lines · plain
1; RUN: opt -passes='print<access-info>' -disable-output < %s 2>&1 | FileCheck %s2 3; We give up analyzing the dependences in this loop due to non-constant4; distance between A[i+offset] and A[i] and add memchecks to prove5; independence. Make sure that no dependences are reported in6; this case.7;8; for (i = 0; i < n; i++)9; A[i + offset] = A[i] * B[i] * C[i];10 11target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"12target triple = "x86_64-apple-macosx10.10.0"13 14; CHECK: Memory dependences are safe with run-time checks15; CHECK-NEXT: Dependences:16; CHECK-NEXT: Run-time memory checks:17; CHECK-NEXT: 0:18; CHECK-NEXT: Comparing group19; CHECK-NEXT: %arrayidxA2 = getelementptr inbounds i16, ptr %a, i64 %idx20; CHECK-NEXT: Against group21; CHECK-NEXT: %arrayidxA = getelementptr inbounds i16, ptr %a, i64 %indvar22 23@B = common global ptr null, align 824@A = common global ptr null, align 825@C = common global ptr null, align 826 27define void @f(i64 %offset) {28entry:29 %a = load ptr, ptr @A, align 830 %b = load ptr, ptr @B, align 831 %c = load ptr, ptr @C, align 832 br label %for.body33 34for.body: ; preds = %for.body, %entry35 %indvar = phi i64 [ 0, %entry ], [ %add, %for.body ]36 37 %arrayidxA = getelementptr inbounds i16, ptr %a, i64 %indvar38 %loadA = load i16, ptr %arrayidxA, align 239 40 %arrayidxB = getelementptr inbounds i16, ptr %b, i64 %indvar41 %loadB = load i16, ptr %arrayidxB, align 242 43 %arrayidxC = getelementptr inbounds i16, ptr %c, i64 %indvar44 %loadC = load i16, ptr %arrayidxC, align 245 46 %mul = mul i16 %loadB, %loadA47 %mul1 = mul i16 %mul, %loadC48 49 %idx = add i64 %indvar, %offset50 %arrayidxA2 = getelementptr inbounds i16, ptr %a, i64 %idx51 store i16 %mul1, ptr %arrayidxA2, align 252 53 %add = add nuw nsw i64 %indvar, 154 %exitcond = icmp eq i64 %add, 2055 br i1 %exitcond, label %for.end, label %for.body56 57for.end: ; preds = %for.body58 ret void59}60