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llvm-mirror/test/Transforms/InstCombine/zero-point-zero-add.ll

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; RUN: opt < %s -instcombine -S | grep 0.0 | count 1
declare double @abs(double)
define double @test(double %X) {
%Y = fadd double %X, 0.0 ;; Should be a single add x, 0.0
%Z = fadd double %Y, 0.0
ret double %Z
}
define double @test1(double %X) {
%Y = call double @abs(double %X)
%Z = fadd double %Y, 0.0
ret double %Z
}