1; Test load hoist
2; RUN: opt -basicaa -memdep -mldst-motion -S < %s | FileCheck %s
3target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
4target triple = "x86_64-pc_linux"
5
6; Function Attrs: nounwind uwtable
7define float* @foo(i32* noalias nocapture readonly %in, float* noalias %out, i32 %size, i32* nocapture readonly %trigger)  {
8entry:
9  %cmp11 = icmp eq i32 %size, 0
10  br i1 %cmp11, label %for.end, label %for.body.lr.ph
11
12for.body.lr.ph:                                   ; preds = %entry
13  %0 = add i32 %size, -1
14  br label %for.body
15
16; CHECK-LABEL: for.body
17; CHECK: load
18; CHECK:  %2 = getelementptr inbounds i32, i32* %in, i64 %indvars.iv
19; CHECK:  %3 = load i32, i32* %2, align 4
20
21for.body:                                         ; preds = %for.body.lr.ph, %for.inc
22  %indvars.iv = phi i64 [ 0, %for.body.lr.ph ], [ %indvars.iv.next, %for.inc ]
23  %arrayidx = getelementptr inbounds i32, i32* %trigger, i64 %indvars.iv
24  %1 = load i32, i32* %arrayidx, align 4
25  %cmp1 = icmp sgt i32 %1, 0
26  br i1 %cmp1, label %if.then, label %if.else
27
28; CHECK-LABEL: if.then
29if.then:                                          ; preds = %for.body
30; This load should be hoisted
31  %arrayidx3 = getelementptr inbounds i32, i32* %in, i64 %indvars.iv
32  %2 = load i32, i32* %arrayidx3, align 4
33  %conv = sitofp i32 %2 to float
34  %add = fadd float %conv, 5.000000e-01
35  %arrayidx5 = getelementptr inbounds float, float* %out, i64 %indvars.iv
36  store float %add, float* %arrayidx5, align 4
37  br label %for.inc
38
39if.else:                                          ; preds = %for.body
40  %arrayidx7 = getelementptr inbounds float, float* %out, i64 %indvars.iv
41  %3 = load float, float* %arrayidx7, align 4
42  %div = fdiv float %3, 3.000000e+00
43  store float %div, float* %arrayidx7, align 4
44; This load should be hoisted in spite of store
45  %arrayidx9 = getelementptr inbounds i32, i32* %in, i64 %indvars.iv
46  %4 = load i32, i32* %arrayidx9, align 4
47  %conv10 = sitofp i32 %4 to float
48  %add13 = fadd float %div, %conv10
49  store float %add13, float* %arrayidx7, align 4
50  br label %for.inc
51
52for.inc:                                          ; preds = %if.then, %if.else
53  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
54  %lftr.wideiv = trunc i64 %indvars.iv to i32
55  %exitcond = icmp ne i32 %lftr.wideiv, %0
56  br i1 %exitcond, label %for.body, label %for.cond.for.end_crit_edge
57
58for.cond.for.end_crit_edge:                       ; preds = %for.inc
59  br label %for.end
60
61for.end:                                          ; preds = %entry, %for.cond.for.end_crit_edge
62  ret float* %out
63}
64
65