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; RUN: opt < %s -instcombine -S | FileCheck %s
; PR4374
define float @test1(float %a, float %b) nounwind {
%t1 = fsub float %a, %b
%t2 = fsub float -0.000000e+00, %t1
; CHECK: %t1 = fsub float %a, %b
; CHECK-NEXT: %t2 = fsub float -0.000000e+00, %t1
ret float %t2
}
; <rdar://problem/7530098>
define double @test2(double %x, double %y) nounwind {
%t1 = fadd double %x, %y
%t2 = fsub double %x, %t1
; CHECK: %t1 = fadd double %x, %y
; CHECK-NEXT: %t2 = fsub double %x, %t1
ret double %t2
}
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