more_intstar_input.go

     1  // run
     2  
     3  //go:build !wasm
     4  
     5  // Copyright 2021 The Go Authors. All rights reserved.
     6  // Use of this source code is governed by a BSD-style
     7  // license that can be found in the LICENSE file.
     8  
     9  // wasm is excluded because the compiler chatter about register abi pragma ends up
    10  // on stdout, and causes the expected output to not match.
    11  
    12  package main
    13  
    14  var sink int
    15  
    16  //go:registerparams
    17  //go:noinline
    18  func F(a, b, c, d, e, f, g, h, i, j, k, l, m *int) {
    19  	G(m, l, k, j, i, h, g, f, e, d, c, b, a)
    20  	// did the pointers get properly updated?
    21  	sink = *a + *m
    22  }
    23  
    24  //go:registerparams
    25  //go:noinline
    26  func G(a, b, c, d, e, f, g, h, i, j, k, l, m *int) {
    27  	// Do not reference the parameters
    28  	var scratch [1000 * 100]int
    29  	I := *c - *e - *l // zero.
    30  	scratch[I] = *d
    31  	println("Got this far!")
    32  	sink += scratch[0]
    33  }
    34  
    35  func main() {
    36  	a, b, c, d, e, f, g, h, i, j, k, l, m := 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13
    37  	F(&a, &b, &c, &d, &e, &f, &g, &h, &i, &j, &k, &l, &m)
    38  	println("Sink =", sink-7)
    39  }
    40
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