go regalloc_test 源码
golang regalloc_test 代码
文件路径：/src/cmd/compile/internal/test/testdata/regalloc_test.go
// 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.
// Tests phi implementation
package main
import "testing"
func phiOverwrite_ssa() int {
var n int
for i := 0; i < 10; i++ {
if i == 6 {
break
}
n = i
}
return n
}
func phiOverwrite(t *testing.T) {
want := 5
got := phiOverwrite_ssa()
if got != want {
t.Errorf("phiOverwrite_ssa()= %d, got %d", want, got)
}
}
func phiOverwriteBig_ssa() int {
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
a = 1
for idx := 0; idx < 26; idx++ {
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
}
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
}
func phiOverwriteBig(t *testing.T) {
want := 1
got := phiOverwriteBig_ssa()
if got != want {
t.Errorf("phiOverwriteBig_ssa()= %d, got %d", want, got)
}
}
func TestRegalloc(t *testing.T) {
phiOverwrite(t)
phiOverwriteBig(t)
}
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