1 2 ; RUN: opt < %s -instcombine -S | not grep fpext 3 @X = external global float 4 @Y = external global float 5 6 define void @test() nounwind { 7 entry: 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 16 define void @test2() nounwind { 17 entry: 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 28 define void @test3() nounwind { 29 entry: 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 40 define void @test4() nounwind { 41 entry: 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
