1; RUN: opt < %s -loop-reduce -S | FileCheck %s
2;
3; Test LSR's ability to prune formulae that refer to nonexistent
4; AddRecs in other loops.
5;
6; Unable to reduce this case further because it requires LSR to exceed
7; ComplexityLimit.
8;
9; We really just want to ensure that LSR can process this loop without
10; finding an unsatisfactory solution and bailing out. I've added
11; dummyout, an obvious candidate for postinc replacement so we can
12; verify that LSR removes it.
13
14target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
15target triple = "x86_64-apple-darwin"
16
17; CHECK-LABEL: @test(
18; CHECK: for.body:
19; CHECK: %lsr.iv
20; CHECK-NOT: %dummyout
21; CHECK: ret
22define i64 @test(i64 %count, float* nocapture %srcrow, i32* nocapture %destrow) nounwind uwtable ssp {
23entry:
24  %cmp34 = icmp eq i64 %count, 0
25  br i1 %cmp34, label %for.end29, label %for.body
26
27for.body:                                         ; preds = %entry, %for.body
28  %dummyiv = phi i64 [ %dummycnt, %for.body ], [ 0, %entry ]
29  %indvars.iv39 = phi i64 [ %indvars.iv.next40, %for.body ], [ 0, %entry ]
30  %dp.036 = phi i32* [ %add.ptr, %for.body ], [ %destrow, %entry ]
31  %p.035 = phi float* [ %incdec.ptr4, %for.body ], [ %srcrow, %entry ]
32  %incdec.ptr = getelementptr inbounds float* %p.035, i64 1
33  %0 = load float* %incdec.ptr, align 4
34  %incdec.ptr2 = getelementptr inbounds float* %p.035, i64 2
35  %1 = load float* %incdec.ptr2, align 4
36  %incdec.ptr3 = getelementptr inbounds float* %p.035, i64 3
37  %2 = load float* %incdec.ptr3, align 4
38  %incdec.ptr4 = getelementptr inbounds float* %p.035, i64 4
39  %3 = load float* %incdec.ptr4, align 4
40  %4 = load i32* %dp.036, align 4
41  %conv5 = fptoui float %0 to i32
42  %or = or i32 %4, %conv5
43  %arrayidx6 = getelementptr inbounds i32* %dp.036, i64 1
44  %5 = load i32* %arrayidx6, align 4
45  %conv7 = fptoui float %1 to i32
46  %or8 = or i32 %5, %conv7
47  %arrayidx9 = getelementptr inbounds i32* %dp.036, i64 2
48  %6 = load i32* %arrayidx9, align 4
49  %conv10 = fptoui float %2 to i32
50  %or11 = or i32 %6, %conv10
51  %arrayidx12 = getelementptr inbounds i32* %dp.036, i64 3
52  %7 = load i32* %arrayidx12, align 4
53  %conv13 = fptoui float %3 to i32
54  %or14 = or i32 %7, %conv13
55  store i32 %or, i32* %dp.036, align 4
56  store i32 %or8, i32* %arrayidx6, align 4
57  store i32 %or11, i32* %arrayidx9, align 4
58  store i32 %or14, i32* %arrayidx12, align 4
59  %add.ptr = getelementptr inbounds i32* %dp.036, i64 4
60  %indvars.iv.next40 = add i64 %indvars.iv39, 4
61  %dummycnt = add i64 %dummyiv, 1
62  %cmp = icmp ult i64 %indvars.iv.next40, %count
63  br i1 %cmp, label %for.body, label %for.cond19.preheader
64
65for.cond19.preheader:                             ; preds = %for.body
66  %dummyout = add i64 %dummyiv, 1
67  %rem = and i64 %count, 3
68  %cmp2130 = icmp eq i64 %rem, 0
69  br i1 %cmp2130, label %for.end29, label %for.body23.lr.ph
70
71for.body23.lr.ph:                                 ; preds = %for.cond19.preheader
72  %8 = and i64 %count, 3
73  br label %for.body23
74
75for.body23:                                       ; preds = %for.body23, %for.body23.lr.ph
76  %indvars.iv = phi i64 [ 0, %for.body23.lr.ph ], [ %indvars.iv.next, %for.body23 ]
77  %dp.132 = phi i32* [ %add.ptr, %for.body23.lr.ph ], [ %incdec.ptr28, %for.body23 ]
78  %p.131 = phi float* [ %incdec.ptr4, %for.body23.lr.ph ], [ %incdec.ptr24, %for.body23 ]
79  %incdec.ptr24 = getelementptr inbounds float* %p.131, i64 1
80  %9 = load float* %incdec.ptr24, align 4
81  %10 = load i32* %dp.132, align 4
82  %conv25 = fptoui float %9 to i32
83  %or26 = or i32 %10, %conv25
84  store i32 %or26, i32* %dp.132, align 4
85  %indvars.iv.next = add i64 %indvars.iv, 1
86  %incdec.ptr28 = getelementptr inbounds i32* %dp.132, i64 1
87  %exitcond = icmp eq i64 %indvars.iv.next, %8
88  br i1 %exitcond, label %for.end29, label %for.body23
89
90for.end29:                                        ; preds = %entry, %for.body23, %for.cond19.preheader
91  %result = phi i64 [ 0, %entry ], [ %dummyout, %for.body23 ], [ %dummyout, %for.cond19.preheader ]
92  ret i64 %result
93}
94