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//go:build ignore
// +build ignore
package main
import (
. "github.com/mmcloughlin/avo/build"
. "github.com/mmcloughlin/avo/reg"
)
func main() {
TEXT("Issue76", NOSPLIT, "func(x, y uint64) uint64")
x := Load(Param("x"), GP64())
y := Load(Param("y"), GP64())
s := add(x, y)
Store(s, ReturnIndex(0))
RET()
Generate()
}
// add generates code to add x and y. The intent here is to demonstrate how a
// natural subroutine in avo typically requires temporary registers, which in
// turn can be "optimized out" by the register allocator and result in redundant
// self-moves.
func add(x, y Register) Register {
s := GP64()
MOVQ(x, s) // likely to become a self move
ADDQ(y, s)
return s
}
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