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1; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py UTC_ARGS: --version 52; RUN: opt -passes='print<access-info>' -disable-output %s 2>&1 | FileCheck %s3 4target datalayout = "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64"5 6; Note: The datalayout for the test specifies a 32 bit index type.7 8; No UB: accessing last valid byte, pointer after the object9; doesnt wrap (%p + 2147483647).10define void @pointer_after_object_does_not_wrap(i32 %y, ptr %s, ptr %p) {11; CHECK-LABEL: 'pointer_after_object_does_not_wrap'12; CHECK-NEXT: loop:13; CHECK-NEXT: Memory dependences are safe with run-time checks14; CHECK-NEXT: Dependences:15; CHECK-NEXT: Run-time memory checks:16; CHECK-NEXT: Check 0:17; CHECK-NEXT: Comparing group GRP0:18; CHECK-NEXT: %gep2.iv = getelementptr inbounds i8, ptr %p, i32 %iv19; CHECK-NEXT: Against group GRP1:20; CHECK-NEXT: %gep1.iv = getelementptr inbounds i8, ptr %s, i32 %iv21; CHECK-NEXT: Grouped accesses:22; CHECK-NEXT: Group GRP0:23; CHECK-NEXT: (Low: (%y + %p) High: (2147483647 + %p))24; CHECK-NEXT: Member: {(%y + %p),+,1}<nw><%loop>25; CHECK-NEXT: Group GRP1:26; CHECK-NEXT: (Low: (%y + %s) High: (2147483647 + %s))27; CHECK-NEXT: Member: {(%y + %s),+,1}<nw><%loop>28; CHECK-EMPTY:29; CHECK-NEXT: Non vectorizable stores to invariant address were not found in loop.30; CHECK-NEXT: SCEV assumptions:31; CHECK-EMPTY:32; CHECK-NEXT: Expressions re-written:33;34entry:35 br label %loop36 37loop:38 %iv = phi i32 [ %y, %entry ], [ %iv.next, %loop ]39 %gep1.iv = getelementptr inbounds i8 , ptr %s, i32 %iv40 %load = load i8, ptr %gep1.iv, align 441 %gep2.iv = getelementptr inbounds i8, ptr %p, i32 %iv42 store i8 %load, ptr %gep2.iv, align 443 %iv.next = add nsw i32 %iv, 144 %c.2 = icmp slt i32 %iv.next, 214748364745 br i1 %c.2, label %loop, label %exit46 47exit:48 ret void49}50 51; UB: accessing %p + 2147483646 and p + 2147483647.52; Pointer the past the object would wrap in signed.53define void @pointer_after_object_would_wrap(i32 %y, ptr %s, ptr %p) {54; CHECK-LABEL: 'pointer_after_object_would_wrap'55; CHECK-NEXT: loop:56; CHECK-NEXT: Memory dependences are safe with run-time checks57; CHECK-NEXT: Dependences:58; CHECK-NEXT: Run-time memory checks:59; CHECK-NEXT: Check 0:60; CHECK-NEXT: Comparing group GRP0:61; CHECK-NEXT: %gep2.iv = getelementptr inbounds i8, ptr %p, i32 %iv62; CHECK-NEXT: Against group GRP1:63; CHECK-NEXT: %gep1.iv = getelementptr inbounds i8, ptr %s, i32 %iv64; CHECK-NEXT: Grouped accesses:65; CHECK-NEXT: Group GRP0:66; CHECK-NEXT: (Low: (%y + %p) High: (-2147483648 + %p))67; CHECK-NEXT: Member: {(%y + %p),+,1}<nw><%loop>68; CHECK-NEXT: Group GRP1:69; CHECK-NEXT: (Low: (%y + %s) High: (-2147483648 + %s))70; CHECK-NEXT: Member: {(%y + %s),+,1}<nw><%loop>71; CHECK-EMPTY:72; CHECK-NEXT: Non vectorizable stores to invariant address were not found in loop.73; CHECK-NEXT: SCEV assumptions:74; CHECK-EMPTY:75; CHECK-NEXT: Expressions re-written:76;77entry:78 br label %loop79 80loop:81 %iv = phi i32 [ %y, %entry ], [ %iv.next, %loop ]82 %gep1.iv = getelementptr inbounds i8 , ptr %s, i32 %iv83 %load = load i16, ptr %gep1.iv, align 484 %gep2.iv = getelementptr inbounds i8, ptr %p, i32 %iv85 store i16 %load, ptr %gep2.iv, align 486 %iv.next = add nsw i32 %iv, 187 %c.2 = icmp slt i32 %iv.next, 214748364788 br i1 %c.2, label %loop, label %exit89 90exit:91 ret void92}93