alloc.go

     1  // asmcheck
     2  
     3  // Copyright 2018 The Go Authors. All rights reserved.
     4  // Use of this source code is governed by a BSD-style
     5  // license that can be found in the LICENSE file.
     6  
     7  // These tests check that allocating a 0-size object does not
     8  // introduce a call to runtime.newobject.
     9  
    10  package codegen
    11  
    12  func zeroAllocNew1() *struct{} {
    13  	// 386:-`CALL runtime\.newobject`, `LEAL runtime.zerobase`
    14  	// amd64:-`CALL runtime\.newobject`, `LEAQ runtime.zerobase`
    15  	// arm:-`CALL runtime\.newobject`, `MOVW [$]runtime.zerobase`
    16  	// arm64:-`CALL runtime\.newobject`, `MOVD [$]runtime.zerobase`
    17  	// riscv64:-`CALL runtime\.newobject`, `MOV [$]runtime.zerobase`
    18  	return new(struct{})
    19  }
    20  
    21  func zeroAllocNew2() *[0]int {
    22  	// 386:-`CALL runtime\.newobject`, `LEAL runtime.zerobase`
    23  	// amd64:-`CALL runtime\.newobject`, `LEAQ runtime.zerobase`
    24  	// arm:-`CALL runtime\.newobject`, `MOVW [$]runtime.zerobase`
    25  	// arm64:-`CALL runtime\.newobject`, `MOVD [$]runtime.zerobase`
    26  	// riscv64:-`CALL runtime\.newobject`, `MOV [$]runtime.zerobase`
    27  	return new([0]int)
    28  }
    29  
    30  func zeroAllocSliceLit() []int {
    31  	// 386:-`CALL runtime\.newobject`, `LEAL runtime.zerobase`
    32  	// amd64:-`CALL runtime\.newobject`, `LEAQ runtime.zerobase`
    33  	// arm:-`CALL runtime\.newobject`, `MOVW [$]runtime.zerobase`
    34  	// arm64:-`CALL runtime\.newobject`, `MOVD [$]runtime.zerobase`
    35  	// riscv64:-`CALL runtime\.newobject`, `MOV [$]runtime.zerobase`
    36  	return []int{}
    37  }
    38
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