1; RUN: opt -licm -S < %s | FileCheck %s
2; RUN: opt -licm -enable-mssa-loop-dependency=true -verify-memoryssa -S < %s | FileCheck %s
3
4; Function Attrs: noinline norecurse nounwind readnone ssp uwtable
5define zeroext i1 @invariant_denom(double %v) #0 {
6entry:
7; CHECK-LABEL: @invariant_denom(
8; CHECK-NEXT: entry:
9; CHECK-NEXT: fdiv fast double 1.000000e+00, %v
10  br label %loop
11
12loop:                                       ; preds = %entry, %loop
13  %v3 = phi i32 [ 0, %entry ], [ %v11, %loop ]
14  %v4 = phi i32 [ 0, %entry ], [ %v12, %loop ]
15  %v5 = uitofp i32 %v4 to double
16
17; CHECK-LABEL: loop:
18; CHECK: fmul fast double
19; CHECK-NOT: fdiv
20  %v6 = fdiv fast double %v5, %v
21  %v7 = fptoui double %v6 to i64
22  %v8 = and i64 %v7, 1
23  %v9 = xor i64 %v8, 1
24  %v10 = trunc i64 %v9 to i32
25  %v11 = add i32 %v10, %v3
26  %v12 = add nuw i32 %v4, 1
27  %v13 = icmp eq i32 %v12, -1
28  br i1 %v13, label %end, label %loop
29
30end:                                      ; preds = %loop
31  %v15 = phi i32 [ %v11, %loop ]
32  %v16 = icmp ne i32 %v15, 0
33  ret i1 %v16
34}
35
36define void @invariant_fdiv(float* %out, float %arg) {
37; CHECK-LABEL: @invariant_fdiv(
38; CHECK-NEXT: entry:
39; CHECK-NEXT: %div = fdiv fast float 4.000000e+00, %arg
40; CHECK-NEXT: fmul fast float %div, 0x41F0000000000000
41entry:
42  br label %loop
43
44loop:                                              ; preds = %loop, %entry
45  %ind = phi i32 [ 0, %entry ], [ %inc, %loop ]
46
47; CHECK-LABEL: loop:
48; CHECK: getelementptr
49; CHECK-NOT: fdiv
50; CHECK-NOT: fmul
51  %div = fdiv fast float 4.000000e+00, %arg
52  %mul = fmul fast float %div, 0x41F0000000000000
53  %gep = getelementptr inbounds float, float* %out, i32 %ind
54  store float %mul, float* %gep, align 4
55  %inc = add nuw nsw i32 %ind, 1
56  %cond = icmp eq i32 %inc, 1024
57  br i1 %cond, label %exit, label %loop
58
59exit:                                              ; preds = %loop
60  ret void
61}
62