derek.holloway
7502bf64a4
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93 lines
3.5 KiB
LLVM
93 lines
3.5 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py UTC_ARGS: --version 5
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; RUN: opt -passes='print<access-info>' -disable-output %s 2>&1 | FileCheck %s
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target datalayout = "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64"
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; Note: The datalayout for the test specifies a 32 bit index type.
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; No UB: accessing last valid byte, pointer after the object
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; doesnt wrap (%p + 2147483647).
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define void @pointer_after_object_does_not_wrap(i32 %y, ptr %s, ptr %p) {
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; CHECK-LABEL: 'pointer_after_object_does_not_wrap'
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; CHECK-NEXT: loop:
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; CHECK-NEXT: Memory dependences are safe with run-time checks
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; CHECK-NEXT: Dependences:
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; CHECK-NEXT: Run-time memory checks:
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; CHECK-NEXT: Check 0:
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; CHECK-NEXT: Comparing group GRP0:
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; CHECK-NEXT: %gep2.iv = getelementptr inbounds i8, ptr %p, i32 %iv
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; CHECK-NEXT: Against group GRP1:
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; CHECK-NEXT: %gep1.iv = getelementptr inbounds i8, ptr %s, i32 %iv
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; CHECK-NEXT: Grouped accesses:
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; CHECK-NEXT: Group GRP0:
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; CHECK-NEXT: (Low: (%y + %p) High: (2147483647 + %p))
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; CHECK-NEXT: Member: {(%y + %p),+,1}<nw><%loop>
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; CHECK-NEXT: Group GRP1:
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; CHECK-NEXT: (Low: (%y + %s) High: (2147483647 + %s))
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; CHECK-NEXT: Member: {(%y + %s),+,1}<nw><%loop>
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; CHECK-EMPTY:
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; CHECK-NEXT: Non vectorizable stores to invariant address were not found in loop.
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; CHECK-NEXT: SCEV assumptions:
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; CHECK-EMPTY:
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; CHECK-NEXT: Expressions re-written:
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;
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entry:
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br label %loop
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loop:
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%iv = phi i32 [ %y, %entry ], [ %iv.next, %loop ]
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%gep1.iv = getelementptr inbounds i8 , ptr %s, i32 %iv
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%load = load i8, ptr %gep1.iv, align 4
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%gep2.iv = getelementptr inbounds i8, ptr %p, i32 %iv
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store i8 %load, ptr %gep2.iv, align 4
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%iv.next = add nsw i32 %iv, 1
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%c.2 = icmp slt i32 %iv.next, 2147483647
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br i1 %c.2, label %loop, label %exit
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exit:
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ret void
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}
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; UB: accessing %p + 2147483646 and p + 2147483647.
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; Pointer the past the object would wrap in signed.
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define void @pointer_after_object_would_wrap(i32 %y, ptr %s, ptr %p) {
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; CHECK-LABEL: 'pointer_after_object_would_wrap'
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; CHECK-NEXT: loop:
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; CHECK-NEXT: Memory dependences are safe with run-time checks
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; CHECK-NEXT: Dependences:
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; CHECK-NEXT: Run-time memory checks:
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; CHECK-NEXT: Check 0:
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; CHECK-NEXT: Comparing group GRP0:
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; CHECK-NEXT: %gep2.iv = getelementptr inbounds i8, ptr %p, i32 %iv
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; CHECK-NEXT: Against group GRP1:
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; CHECK-NEXT: %gep1.iv = getelementptr inbounds i8, ptr %s, i32 %iv
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; CHECK-NEXT: Grouped accesses:
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; CHECK-NEXT: Group GRP0:
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; CHECK-NEXT: (Low: (%y + %p) High: (-2147483648 + %p))
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; CHECK-NEXT: Member: {(%y + %p),+,1}<nw><%loop>
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; CHECK-NEXT: Group GRP1:
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; CHECK-NEXT: (Low: (%y + %s) High: (-2147483648 + %s))
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; CHECK-NEXT: Member: {(%y + %s),+,1}<nw><%loop>
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; CHECK-EMPTY:
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; CHECK-NEXT: Non vectorizable stores to invariant address were not found in loop.
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; CHECK-NEXT: SCEV assumptions:
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; CHECK-EMPTY:
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; CHECK-NEXT: Expressions re-written:
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;
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entry:
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br label %loop
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loop:
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%iv = phi i32 [ %y, %entry ], [ %iv.next, %loop ]
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%gep1.iv = getelementptr inbounds i8 , ptr %s, i32 %iv
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%load = load i16, ptr %gep1.iv, align 4
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%gep2.iv = getelementptr inbounds i8, ptr %p, i32 %iv
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store i16 %load, ptr %gep2.iv, align 4
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%iv.next = add nsw i32 %iv, 1
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%c.2 = icmp slt i32 %iv.next, 2147483647
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br i1 %c.2, label %loop, label %exit
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exit:
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ret void
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}
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