1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
|
; RUN: opt < %s -instcombine -S | not grep fpext
@X = external global float
@Y = external global float
define void @test() nounwind {
entry:
%tmp = load float* @X, align 4 ; <float> [#uses=1]
%tmp1 = fpext float %tmp to double ; <double> [#uses=1]
%tmp3 = fadd double %tmp1, 0.000000e+00 ; <double> [#uses=1]
%tmp34 = fptrunc double %tmp3 to float ; <float> [#uses=1]
store float %tmp34, float* @X, align 4
ret void
}
define void @test2() nounwind {
entry:
%tmp = load float* @X, align 4 ; <float> [#uses=1]
%tmp1 = fpext float %tmp to double ; <double> [#uses=1]
%tmp2 = load float* @Y, align 4 ; <float> [#uses=1]
%tmp23 = fpext float %tmp2 to double ; <double> [#uses=1]
%tmp5 = fmul double %tmp1, %tmp23 ; <double> [#uses=1]
%tmp56 = fptrunc double %tmp5 to float ; <float> [#uses=1]
store float %tmp56, float* @X, align 4
ret void
}
define void @test3() nounwind {
entry:
%tmp = load float* @X, align 4 ; <float> [#uses=1]
%tmp1 = fpext float %tmp to double ; <double> [#uses=1]
%tmp2 = load float* @Y, align 4 ; <float> [#uses=1]
%tmp23 = fpext float %tmp2 to double ; <double> [#uses=1]
%tmp5 = fdiv double %tmp1, %tmp23 ; <double> [#uses=1]
%tmp56 = fptrunc double %tmp5 to float ; <float> [#uses=1]
store float %tmp56, float* @X, align 4
ret void
}
define void @test4() nounwind {
entry:
%tmp = load float* @X, align 4 ; <float> [#uses=1]
%tmp1 = fpext float %tmp to double ; <double> [#uses=1]
%tmp2 = fsub double -0.000000e+00, %tmp1 ; <double> [#uses=1]
%tmp34 = fptrunc double %tmp2 to float ; <float> [#uses=1]
store float %tmp34, float* @X, align 4
ret void
}
|
