1 ; RUN: opt -S -indvars < %s | FileCheck %s
3 ; Provide legal integer types.
4 target datalayout = "n8:16:32:64"
7 define void @test1(float* nocapture %autoc, float* nocapture %data, float %d, i32 %data_len, i32 %sample) nounwind {
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
13 for.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
30 for.end: ; preds = %for.body, %entry
33 ; CHECK-LABEL: @test1(
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
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