regalloc_test.go

     1  // Copyright 2015 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  // Tests phi implementation
     6  
     7  package main
     8  
     9  import "testing"
    10  
    11  func phiOverwrite_ssa() int {
    12  	var n int
    13  	for i := 0; i < 10; i++ {
    14  		if i == 6 {
    15  			break
    16  		}
    17  		n = i
    18  	}
    19  	return n
    20  }
    21  
    22  func phiOverwrite(t *testing.T) {
    23  	want := 5
    24  	got := phiOverwrite_ssa()
    25  	if got != want {
    26  		t.Errorf("phiOverwrite_ssa()= %d, got %d", want, got)
    27  	}
    28  }
    29  
    30  func phiOverwriteBig_ssa() int {
    31  	var a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x, y, z int
    32  	a = 1
    33  	for idx := 0; idx < 26; idx++ {
    34  		a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x, y, z = b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x, y, z, a
    35  	}
    36  	return a*1 + b*2 + c*3 + d*4 + e*5 + f*6 + g*7 + h*8 + i*9 + j*10 + k*11 + l*12 + m*13 + n*14 + o*15 + p*16 + q*17 + r*18 + s*19 + t*20 + u*21 + v*22 + w*23 + x*24 + y*25 + z*26
    37  }
    38  
    39  func phiOverwriteBig(t *testing.T) {
    40  	want := 1
    41  	got := phiOverwriteBig_ssa()
    42  	if got != want {
    43  		t.Errorf("phiOverwriteBig_ssa()= %d, got %d", want, got)
    44  	}
    45  }
    46  
    47  func TestRegalloc(t *testing.T) {
    48  	phiOverwrite(t)
    49  	phiOverwriteBig(t)
    50  }
    51
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