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cs420/examples/ir4/gcd.ir
2025-04-11 13:20:10 +09:00

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fun i32 @gcd (i32, i32) {
init:
bid: b0
allocations:
block b0:
%b0:p0:i32:a
%b0:p1:i32:b
%b0:i0:u1 = cmp gt %b0:p0:i32 0:i32
br %b0:i0:u1, b1(), b2()
block b1:
j b3(%b0:p0:i32)
block b2:
%b2:i0:i32 = minus %b0:p0:i32
j b3(%b2:i0:i32)
block b3:
%b3:p0:i32:t0
%b3:i0:u1 = cmp gt %b0:p1:i32 0:i32
br %b3:i0:u1, b4(), b5()
block b4:
j b6(%b0:p1:i32)
block b5:
%b5:i0:i32 = minus %b0:p1:i32
j b6(%b5:i0:i32)
block b6:
%b6:p0:i32:t1
j b7(%b3:p0:i32, %b6:p0:i32)
block b7:
%b7:p0:i32:a
%b7:p1:i32:b
%b7:i0:u1 = cmp ne %b7:p0:i32 %b7:p1:i32
br %b7:i0:u1, b8(), b9()
block b8:
%b8:i0:u1 = cmp gt %b7:p0:i32 %b7:p1:i32
br %b8:i0:u1, b10(), b11()
block b9:
ret %b7:p0:i32
block b10:
%b10:i0:i32 = sub %b7:p0:i32 %b7:p1:i32
j b7(%b10:i0:i32, %b7:p1:i32)
block b11:
%b11:i0:i32 = sub %b7:p1:i32 %b7:p0:i32
j b7(%b7:p0:i32, %b11:i0:i32)
}
fun i32 @main () {
init:
bid: b0
allocations:
block b0:
%b0:i0:i32 = call @gcd:[ret:i32 params:(i32, i32)]*(18:i32, 21:i32)
%b0:i1:u1 = cmp eq %b0:i0:i32 3:i32
%b0:i2:i32 = typecast %b0:i1:u1 to i32
ret %b0:i2:i32
}