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1; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py UTC_ARGS: --version 42; RUN: opt -passes='print<access-info>' -disable-output < %s 2>&1 | FileCheck %s3 4; for (unsigned i = 0; i < 100; i++) {5; A[i+8] = B[i] + 2;6; C[i] = A[i] * 2;7; }8 9target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"10 11define void @forward_loop_carried(ptr noalias %A, ptr noalias %B, ptr noalias %C, i64 %N) {12; CHECK-LABEL: 'forward_loop_carried'13; CHECK-NEXT: for.body:14; CHECK-NEXT: Memory dependences are safe15; CHECK-NEXT: Dependences:16; CHECK-NEXT: Forward:17; CHECK-NEXT: store i32 %a_p1, ptr %Aidx_ahead, align 4 ->18; CHECK-NEXT: %a = load i32, ptr %Aidx, align 419; CHECK-EMPTY:20; CHECK-NEXT: Run-time memory checks:21; CHECK-NEXT: Grouped accesses:22; CHECK-EMPTY:23; CHECK-NEXT: Non vectorizable stores to invariant address were not found in loop.24; CHECK-NEXT: SCEV assumptions:25; CHECK-EMPTY:26; CHECK-NEXT: Expressions re-written:27;28entry:29 br label %for.body30 31for.body: ; preds = %for.body, %entry32 %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]33 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 134 35 %idx = add nuw nsw i64 %indvars.iv, 836 37 %Aidx_ahead = getelementptr inbounds i32, ptr %A, i64 %idx38 %Bidx = getelementptr inbounds i32, ptr %B, i64 %indvars.iv39 %Cidx = getelementptr inbounds i32, ptr %C, i64 %indvars.iv40 %Aidx = getelementptr inbounds i32, ptr %A, i64 %indvars.iv41 42 %b = load i32, ptr %Bidx, align 443 %a_p1 = add i32 %b, 244 store i32 %a_p1, ptr %Aidx_ahead, align 445 46 %a = load i32, ptr %Aidx, align 447 %c = mul i32 %a, 248 store i32 %c, ptr %Cidx, align 449 50 %exitcond = icmp eq i64 %indvars.iv.next, %N51 br i1 %exitcond, label %for.end, label %for.body52 53for.end: ; preds = %for.body54 ret void55}56 57%struct = type { i8, [3 x i8], i32 }58 59define void @forward_different_access_sizes(ptr readnone %end, ptr %start) {60; CHECK-LABEL: 'forward_different_access_sizes'61; CHECK-NEXT: loop:62; CHECK-NEXT: Report: unsafe dependent memory operations in loop. Use #pragma clang loop distribute(enable) to allow loop distribution to attempt to isolate the offending operations into a separate loop63; CHECK-NEXT: Forward loop carried data dependence that prevents store-to-load forwarding.64; CHECK-NEXT: Dependences:65; CHECK-NEXT: Forward:66; CHECK-NEXT: %l = load i24, ptr %gep.1, align 1 ->67; CHECK-NEXT: store i24 %l, ptr %ptr.iv, align 168; CHECK-EMPTY:69; CHECK-NEXT: ForwardButPreventsForwarding:70; CHECK-NEXT: store i32 0, ptr %gep.2, align 4 ->71; CHECK-NEXT: %l = load i24, ptr %gep.1, align 172; CHECK-EMPTY:73; CHECK-NEXT: Forward:74; CHECK-NEXT: store i32 0, ptr %gep.2, align 4 ->75; CHECK-NEXT: store i24 %l, ptr %ptr.iv, align 176; CHECK-EMPTY:77; CHECK-NEXT: Run-time memory checks:78; CHECK-NEXT: Grouped accesses:79; CHECK-EMPTY:80; CHECK-NEXT: Non vectorizable stores to invariant address were not found in loop.81; CHECK-NEXT: SCEV assumptions:82; CHECK-EMPTY:83; CHECK-NEXT: Expressions re-written:84;85entry:86 br label %loop87 88loop:89 %ptr.iv = phi ptr [ %start, %entry ], [ %next, %loop ]90 %gep.2 = getelementptr %struct, ptr %ptr.iv, i64 0, i32 291 store i32 0, ptr %gep.2, align 492 %gep.1 = getelementptr %struct, ptr %ptr.iv, i64 0, i32 193 %l = load i24, ptr %gep.1, align 194 store i24 %l, ptr %ptr.iv, align 195 %next = getelementptr inbounds %struct, ptr %ptr.iv, i64 196 %ec = icmp eq ptr %ptr.iv, %end97 br i1 %ec, label %exit, label %loop98 99exit:100 ret void101}102