1 ; RUN: opt -analyze --loop-accesses %s -enable-new-pm=0 | FileCheck %s
2 ; RUN: opt -passes=print-access-info %s -disable-output 2>&1 | FileCheck %s
4 ; This test defends against accidentally using alloc size instead of store size when performing run-time
5 ; boundary check of memory accesses. The IR in this file is based on
6 ; llvm/test/Analysis/LoopAccessAnalysis/memcheck-off-by-one-error.ll.
7 ; Here, we use i19 instead of i64 because it has a different alloc size to its store size.
9 ;CHECK: function 'fastCopy':
10 ;CHECK: (Low: %op High: (27 + %op))
11 ;CHECK: (Low: %src High: (27 + %src))
13 define void @fastCopy(i8* nocapture readonly %src, i8* nocapture %op) {
15 br label %while.body.preheader
17 while.body.preheader: ; preds = %entry
20 while.body: ; preds = %while.body.preheader, %while.body
21 %len.addr.07 = phi i32 [ %sub, %while.body ], [ 32, %while.body.preheader ]
22 %op.addr.06 = phi i8* [ %add.ptr1, %while.body ], [ %op, %while.body.preheader ]
23 %src.addr.05 = phi i8* [ %add.ptr, %while.body ], [ %src, %while.body.preheader ]
24 %0 = bitcast i8* %src.addr.05 to i19*
25 %1 = load i19, i19* %0, align 8
26 %2 = bitcast i8* %op.addr.06 to i19*
27 store i19 %1, i19* %2, align 8
28 %add.ptr = getelementptr inbounds i8, i8* %src.addr.05, i19 8
29 %add.ptr1 = getelementptr inbounds i8, i8* %op.addr.06, i19 8
30 %sub = add nsw i32 %len.addr.07, -8
31 %cmp = icmp sgt i32 %len.addr.07, 8
32 br i1 %cmp, label %while.body, label %while.end.loopexit
34 while.end.loopexit: ; preds = %while.body
37 while.end: ; preds = %while.end.loopexit, %entry