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test/codegen: port len/cap pow2 div tests to codegen

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And delete them from asm_test.

Change-Id: I29c8d098a8893e6b669b6272a2f508985ac9d618
Reviewed-on: https://go-review.googlesource.com/100876
Reviewed-by: Cherry Zhang <cherryyz@google.com>
This commit is contained in:
Alberto Donizetti 2018-03-15 10:06:37 +01:00
parent 107325627b
commit ded9a1b372
2 changed files with 39 additions and 104 deletions
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104
src/cmd/compile/internal/gc/asm_test.go
View file

@ -578,58 +578,6 @@ var linuxAMD64Tests = []*asmTest{
`,
pos: []string{"\tSETHI\t.*\\(SP\\)"},
},
// Check that len() and cap() div by a constant power of two
// are compiled into SHRQ.
{
fn: `
func $(a []int) int {
return len(a) / 1024
}
`,
pos: []string{"\tSHRQ\t\\$10,"},
},
{
fn: `
func $(s string) int {
return len(s) / (4097 >> 1)
}
`,
pos: []string{"\tSHRQ\t\\$11,"},
},
{
fn: `
func $(a []int) int {
return cap(a) / ((1 << 11) + 2048)
}
`,
pos: []string{"\tSHRQ\t\\$12,"},
},
// Check that len() and cap() mod by a constant power of two
// are compiled into ANDQ.
{
fn: `
func $(a []int) int {
return len(a) % 1024
}
`,
pos: []string{"\tANDQ\t\\$1023,"},
},
{
fn: `
func $(s string) int {
return len(s) % (4097 >> 1)
}
`,
pos: []string{"\tANDQ\t\\$2047,"},
},
{
fn: `
func $(a []int) int {
return cap(a) % ((1 << 11) + 2048)
}
`,
pos: []string{"\tANDQ\t\\$4095,"},
},
{
fn: `
func $(p int, q *int) bool {
@ -683,58 +631,6 @@ var linux386Tests = []*asmTest{
`,
pos: []string{"TEXT\t.*, [$]0-4"},
},
// Check that len() and cap() div by a constant power of two
// are compiled into SHRL.
{
fn: `
func $(a []int) int {
return len(a) / 1024
}
`,
pos: []string{"\tSHRL\t\\$10,"},
},
{
fn: `
func $(s string) int {
return len(s) / (4097 >> 1)
}
`,
pos: []string{"\tSHRL\t\\$11,"},
},
{
fn: `
func $(a []int) int {
return cap(a) / ((1 << 11) + 2048)
}
`,
pos: []string{"\tSHRL\t\\$12,"},
},
// Check that len() and cap() mod by a constant power of two
// are compiled into ANDL.
{
fn: `
func $(a []int) int {
return len(a) % 1024
}
`,
pos: []string{"\tANDL\t\\$1023,"},
},
{
fn: `
func $(s string) int {
return len(s) % (4097 >> 1)
}
`,
pos: []string{"\tANDL\t\\$2047,"},
},
{
fn: `
func $(a []int) int {
return cap(a) % ((1 << 11) + 2048)
}
`,
pos: []string{"\tANDL\t\\$4095,"},
},
}
var linuxS390XTests = []*asmTest{

39
test/codegen/arithmetic.go
View file

@ -118,3 +118,42 @@ func ConstMods(n1 uint, n2 int) (uint, int) {
return a, b
}
// Check that len() and cap() calls divided by powers of two are
// optimized into shifts and ands
func LenDiv1(a []int) int {
// 386:"SHRL\t[$]10"
// amd64:"SHRQ\t[$]10"
return len(a) / 1024
}
func LenDiv2(s string) int {
// 386:"SHRL\t[$]11"
// amd64:"SHRQ\t[$]11"
return len(s) / (4097 >> 1)
}
func LenMod1(a []int) int {
// 386:"ANDL\t[$]1023"
// amd64:"ANDQ\t[$]1023"
return len(a) % 1024
}
func LenMod2(s string) int {
// 386:"ANDL\t[$]2047"
// amd64:"ANDQ\t[$]2047"
return len(s) % (4097 >> 1)
}
func CapDiv(a []int) int {
// 386:"SHRL\t[$]12"
// amd64:"SHRQ\t[$]12"
return cap(a) / ((1 << 11) + 2048)
}
func CapMod(a []int) int {
// 386:"ANDL\t[$]4095"
// amd64:"ANDQ\t[$]4095"
return cap(a) % ((1 << 11) + 2048)
}