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Source file test/inline.go

Documentation: test

  // errorcheck -0 -m
  
  // Copyright 2015 The Go Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style
  // license that can be found in the LICENSE file.
  
  // Test, using compiler diagnostic flags, that inlining is working.
  // Compiles but does not run.
  
  package foo
  
  import "unsafe"
  
  func add2(p *byte, n uintptr) *byte { // ERROR "can inline add2" "leaking param: p to result"
  	return (*byte)(add1(unsafe.Pointer(p), n)) // ERROR "inlining call to add1"
  }
  
  func add1(p unsafe.Pointer, x uintptr) unsafe.Pointer { // ERROR "can inline add1" "leaking param: p to result"
  	return unsafe.Pointer(uintptr(p) + x)
  }
  
  func f(x *byte) *byte { // ERROR "can inline f" "leaking param: x to result"
  	return add2(x, 1) // ERROR "inlining call to add2" "inlining call to add1"
  }
  
  //go:noinline
  func g(x int) int {
  	return x + 1
  }
  
  func h(x int) int { // ERROR "can inline h"
  	return x + 2
  }
  
  func i(x int) int { // ERROR "can inline i"
  	const y = 2
  	return x + y
  }
  
  func j(x int) int { // ERROR "can inline j"
  	switch {
  	case x > 0:
  		return x + 2
  	default:
  		return x + 1
  	}
  }
  
  // can't currently inline functions with a break statement
  func switchBreak(x, y int) int {
  	var n int
  	switch x {
  	case 0:
  		n = 1
  	Done:
  		switch y {
  		case 0:
  			n += 10
  			break Done
  		}
  		n = 2
  	}
  	return n
  }
  
  // can't currently inline functions with a type switch
  func switchType(x interface{}) int { // ERROR "switchType x does not escape"
  	switch x.(type) {
  	case int:
  		return x.(int)
  	default:
  		return 0
  	}
  }
  

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