1; RUN: opt -loop-unroll -S -mtriple arm-none-eabi -mcpu=cortex-m7 %s | FileCheck %s -check-prefix=UNROLL
2
3; This test is meant to check that this loop is unrolled into three iterations.
4
5; UNROLL-LABEL: @test
6; UNROLL: load i32, i32*
7; UNROLL: load i32, i32*
8; UNROLL: load i32, i32*
9; UNROLL-NOT: load i32, i32*
10
11define void @test(i32* %x, i32 %n) {
12entry:
13  %sub = add nsw i32 %n, -1
14  %rem = srem i32 %sub, 4
15  %cmp7 = icmp sgt i32 %rem, 0
16  br i1 %cmp7, label %while.body, label %while.end
17
18while.body:                                       ; preds = %entry, %if.end
19  %x.addr.09 = phi i32* [ %incdec.ptr, %if.end ], [ %x, %entry ]
20  %n.addr.08 = phi i32 [ %dec, %if.end ], [ %rem, %entry ]
21  %0 = load i32, i32* %x.addr.09, align 4
22  %cmp1 = icmp slt i32 %0, 10
23  br i1 %cmp1, label %if.then, label %if.end
24
25if.then:                                          ; preds = %while.body
26  store i32 0, i32* %x.addr.09, align 4
27  br label %if.end
28
29if.end:                                           ; preds = %if.then, %while.body
30  %incdec.ptr = getelementptr inbounds i32, i32* %x.addr.09, i32 1
31  %dec = add nsw i32 %n.addr.08, -1
32  %cmp = icmp sgt i32 %dec, 0
33  br i1 %cmp, label %while.body, label %while.end
34
35while.end:                                        ; preds = %if.end, %entry
36  ret void
37}
38
39