1
2; RUN: opt < %s -instcombine -S | not grep fpext
3@X = external global float
4@Y = external global float
5
6define void @test() nounwind  {
7entry:
8	%tmp = load float* @X, align 4		; <float> [#uses=1]
9	%tmp1 = fpext float %tmp to double		; <double> [#uses=1]
10	%tmp3 = fadd double %tmp1, 0.000000e+00		; <double> [#uses=1]
11	%tmp34 = fptrunc double %tmp3 to float		; <float> [#uses=1]
12	store float %tmp34, float* @X, align 4
13	ret void
14}
15
16define void @test2() nounwind  {
17entry:
18	%tmp = load float* @X, align 4		; <float> [#uses=1]
19	%tmp1 = fpext float %tmp to double		; <double> [#uses=1]
20	%tmp2 = load float* @Y, align 4		; <float> [#uses=1]
21	%tmp23 = fpext float %tmp2 to double		; <double> [#uses=1]
22	%tmp5 = fmul double %tmp1, %tmp23		; <double> [#uses=1]
23	%tmp56 = fptrunc double %tmp5 to float		; <float> [#uses=1]
24	store float %tmp56, float* @X, align 4
25	ret void
26}
27
28define void @test3() nounwind  {
29entry:
30	%tmp = load float* @X, align 4		; <float> [#uses=1]
31	%tmp1 = fpext float %tmp to double		; <double> [#uses=1]
32	%tmp2 = load float* @Y, align 4		; <float> [#uses=1]
33	%tmp23 = fpext float %tmp2 to double		; <double> [#uses=1]
34	%tmp5 = fdiv double %tmp1, %tmp23		; <double> [#uses=1]
35	%tmp56 = fptrunc double %tmp5 to float		; <float> [#uses=1]
36	store float %tmp56, float* @X, align 4
37	ret void
38}
39
40define void @test4() nounwind  {
41entry:
42	%tmp = load float* @X, align 4		; <float> [#uses=1]
43	%tmp1 = fpext float %tmp to double		; <double> [#uses=1]
44	%tmp2 = fsub double -0.000000e+00, %tmp1		; <double> [#uses=1]
45	%tmp34 = fptrunc double %tmp2 to float		; <float> [#uses=1]
46	store float %tmp34, float* @X, align 4
47	ret void
48}
49