1; RUN: opt -S -indvars < %s | FileCheck %s
2
3; Provide legal integer types.
4target datalayout = "n8:16:32:64"
5
6
7define void @test1(float* nocapture %autoc, float* nocapture %data, float %d, i32 %data_len, i32 %sample) nounwind {
8entry:
9  %sub = sub i32 %data_len, %sample
10  %cmp4 = icmp eq i32 %data_len, %sample
11  br i1 %cmp4, label %for.end, label %for.body
12
13for.body:                                         ; preds = %entry, %for.body
14  %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ]
15  %0 = trunc i64 %indvars.iv to i32
16  %add = add i32 %0, %sample
17  %idxprom = zext i32 %add to i64
18  %arrayidx = getelementptr inbounds float, float* %data, i64 %idxprom
19  %1 = load float, float* %arrayidx, align 4
20  %mul = fmul float %1, %d
21  %arrayidx2 = getelementptr inbounds float, float* %autoc, i64 %indvars.iv
22  %2 = load float, float* %arrayidx2, align 4
23  %add3 = fadd float %2, %mul
24  store float %add3, float* %arrayidx2, align 4
25  %indvars.iv.next = add i64 %indvars.iv, 1
26  %3 = trunc i64 %indvars.iv.next to i32
27  %cmp = icmp ult i32 %3, %sub
28  br i1 %cmp, label %for.body, label %for.end
29
30for.end:                                          ; preds = %for.body, %entry
31  ret void
32
33; CHECK-LABEL: @test1(
34
35; First check that we move the sub into the preheader, it doesn't have to be
36; executed if %cmp4 == false
37; CHECK: for.body.preheader:
38; CHECK: sub i32 %data_len, %sample
39; CHECK: br label %for.body
40
41; Second, check that we turn the IV test into an eq.
42; CHECK: %lftr.wideiv = trunc i64 %indvars.iv.next to i32
43; CHECK: %exitcond = icmp ne i32 %lftr.wideiv, %0
44; CHECK: br i1 %exitcond, label %for.body, label %for.end.loopexit
45}
46
47