As far as I am aware:
A LEA with a scale of 3 does not exist on amd64. Scale can be 1,2,4,8.
A LEA with 3 arguments LEAQ 4(AX)(AX*2) on many modern amd64 compatible
machines will use 3 cycles instead of 2 for two simpler LEA.
The newest generation of Intel CPUs seems to have gotten better again
Go has optimizing compilers and linkers which are constantly being improved.
The following example of your program reduces the call to test3 to
MOVQ $0x82, 0(SP)
where 0x82 = 130 = 42 * 3 + 4
$ cat xiecui.go
package main
func test3(a int) int {
return a*3 + 4
}
func main() {
a := 42
