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; 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 @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
}
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