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# pragma
Apply [compiler directives](https://golang.org/pkg/cmd/compile/#hdr-Compiler_Directives) to `avo` functions.
The [code generator](asm.go) uses the `Pragma` function to apply the `//go:noescape` directive to the `Add` function:
[embedmd]:# (asm.go go /func main/ /^}/)
```go
func main() {
TEXT("Add", NOSPLIT, "func(z, x, y *uint64)")
Pragma("noescape")
Doc("Add adds the values at x and y and writes the result to z.")
zptr := Mem{Base: Load(Param("z"), GP64())}
xptr := Mem{Base: Load(Param("x"), GP64())}
yptr := Mem{Base: Load(Param("y"), GP64())}
x, y := GP64(), GP64()
MOVQ(xptr, x)
MOVQ(yptr, y)
ADDQ(x, y)
MOVQ(y, zptr)
RET()
Generate()
}
```
Note the directive is applied in the generated stub file:
[embedmd]:# (stub.go go /\/\/ Add/ /func/)
```go
// Add adds the values at x and y and writes the result to z.
//
//go:noescape
func
```
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