1 ; RUN: opt < %s -mtriple=aarch64-linux-gnu -simplifycfg -enable-unsafe-fp-math -S >%t
2 ; RUN: FileCheck %s < %t
5 ; Function Attrs: nounwind
6 define double @_Z3fooRdS_S_S_(double* dereferenceable(8) %x, double* dereferenceable(8) %y, double* dereferenceable(8) %a) #0 {
8 %0 = load double, double* %y, align 8
9 %cmp = fcmp oeq double %0, 0.000000e+00
10 %1 = load double, double* %x, align 8
11 br i1 %cmp, label %if.then, label %if.else
13 ; fadd (const, (fmul x, y))
14 if.then: ; preds = %entry
15 ; CHECK-LABEL: if.then:
16 ; CHECK: %3 = fmul fast double %1, %2
17 ; CHECK-NEXT: %mul = fadd fast double 1.000000e+00, %3
18 %2 = load double, double* %a, align 8
19 %3 = fmul fast double %1, %2
20 %mul = fadd fast double 1.000000e+00, %3
21 store double %mul, double* %y, align 8
24 ; fsub ((fmul x, y), z)
25 if.else: ; preds = %entry
26 ; CHECK-LABEL: if.else:
27 ; CHECK: %mul1 = fmul fast double %1, %2
28 ; CHECK-NEXT: %sub1 = fsub fast double %mul1, %0
29 %4 = load double, double* %a, align 8
30 %mul1 = fmul fast double %1, %4
31 %sub1 = fsub fast double %mul1, %0
32 store double %sub1, double* %y, align 8
35 if.end: ; preds = %if.else, %if.then
36 %5 = load double, double* %y, align 8
37 %cmp2 = fcmp oeq double %5, 2.000000e+00
38 %6 = load double, double* %x, align 8
39 br i1 %cmp2, label %if.then2, label %if.else2
41 ; fsub (x, (fmul y, z))
42 if.then2: ; preds = %entry
43 ; CHECK-LABEL: if.then2:
44 ; CHECK: %7 = fmul fast double %5, 3.000000e+00
45 ; CHECK-NEXT: %mul2 = fsub fast double %6, %7
46 %7 = load double, double* %a, align 8
47 %8 = fmul fast double %6, 3.0000000e+00
48 %mul2 = fsub fast double %7, %8
49 store double %mul2, double* %y, align 8
52 ; fsub (fneg((fmul x, y)), const)
53 if.else2: ; preds = %entry
54 ; CHECK-LABEL: if.else2:
55 ; CHECK: %mul3 = fmul fast double %5, 3.000000e+00
56 ; CHECK-NEXT: %neg = fsub fast double 0.000000e+00, %mul3
57 ; CHECK-NEXT: %sub2 = fsub fast double %neg, 3.000000e+00
58 %mul3 = fmul fast double %6, 3.0000000e+00
59 %neg = fsub fast double 0.0000000e+00, %mul3
60 %sub2 = fsub fast double %neg, 3.0000000e+00
61 store double %sub2, double* %y, align 8
64 if.end2: ; preds = %if.else, %if.then
65 %9 = load double, double* %x, align 8
66 %10 = load double, double* %y, align 8
67 %add = fadd fast double %9, %10
68 %11 = load double, double* %a, align 8
69 %add2 = fadd fast double %add, %11