blob: 6d1e19608082b98d95663b7ae17c5b3db3f5881d [file] [log] [blame]
; RUN: opt -analyze --loop-accesses %s -enable-new-pm=0 | FileCheck %s
; RUN: opt -passes=print-access-info %s -disable-output 2>&1 | FileCheck %s
; This test defends against accidentally using alloc size instead of store size when performing run-time
; boundary check of memory accesses. The IR in this file is based on
; llvm/test/Analysis/LoopAccessAnalysis/memcheck-off-by-one-error.ll.
; Here, we use i19 instead of i64 because it has a different alloc size to its store size.
;CHECK: function 'fastCopy':
;CHECK: (Low: %op High: (27 + %op))
;CHECK: (Low: %src High: (27 + %src))
define void @fastCopy(i8* nocapture readonly %src, i8* nocapture %op) {
entry:
br label %while.body.preheader
while.body.preheader: ; preds = %entry
br label %while.body
while.body: ; preds = %while.body.preheader, %while.body
%len.addr.07 = phi i32 [ %sub, %while.body ], [ 32, %while.body.preheader ]
%op.addr.06 = phi i8* [ %add.ptr1, %while.body ], [ %op, %while.body.preheader ]
%src.addr.05 = phi i8* [ %add.ptr, %while.body ], [ %src, %while.body.preheader ]
%0 = bitcast i8* %src.addr.05 to i19*
%1 = load i19, i19* %0, align 8
%2 = bitcast i8* %op.addr.06 to i19*
store i19 %1, i19* %2, align 8
%add.ptr = getelementptr inbounds i8, i8* %src.addr.05, i19 8
%add.ptr1 = getelementptr inbounds i8, i8* %op.addr.06, i19 8
%sub = add nsw i32 %len.addr.07, -8
%cmp = icmp sgt i32 %len.addr.07, 8
br i1 %cmp, label %while.body, label %while.end.loopexit
while.end.loopexit: ; preds = %while.body
br label %while.end
while.end: ; preds = %while.end.loopexit, %entry
ret void
}