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