mirror of
https://github.com/golang/go
synced 2024-11-22 19:54:39 -07:00
9b4268c3df
We don't need noLimit checks in a bunch of places. Also simplify folding of provable constant results. At this point in the CL stack, compilebench reports no performance changes. The only thing of note is that binaries got a bit smaller. name old text-bytes new text-bytes delta HelloSize 960kB ± 0% 952kB ± 0% -0.83% (p=0.000 n=10+10) CmdGoSize 12.3MB ± 0% 12.1MB ± 0% -1.53% (p=0.000 n=10+10) Change-Id: Id4be75eec0f8c93f2f3b93a8521ce2278ee2ee2c Reviewed-on: https://go-review.googlesource.com/c/go/+/599197 Reviewed-by: David Chase <drchase@google.com> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Michael Knyszek <mknyszek@google.com>
284 lines
6.9 KiB
Go
284 lines
6.9 KiB
Go
// asmcheck
|
|
|
|
// Copyright 2020 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.
|
|
|
|
package codegen
|
|
|
|
import (
|
|
"math/bits"
|
|
)
|
|
|
|
// This file contains codegen tests related to boolean simplifications/optimizations.
|
|
|
|
func convertNeq0B(x uint8, c bool) bool {
|
|
// amd64:"ANDL\t[$]1",-"SETNE"
|
|
// ppc64x:"RLDICL",-"CMPW",-"ISEL"
|
|
b := x&1 != 0
|
|
return c && b
|
|
}
|
|
|
|
func convertNeq0W(x uint16, c bool) bool {
|
|
// amd64:"ANDL\t[$]1",-"SETNE"
|
|
// ppc64x:"RLDICL",-"CMPW",-"ISEL"
|
|
b := x&1 != 0
|
|
return c && b
|
|
}
|
|
|
|
func convertNeq0L(x uint32, c bool) bool {
|
|
// amd64:"ANDL\t[$]1",-"SETB"
|
|
// ppc64x:"RLDICL",-"CMPW",-"ISEL"
|
|
b := x&1 != 0
|
|
return c && b
|
|
}
|
|
|
|
func convertNeq0Q(x uint64, c bool) bool {
|
|
// amd64:"ANDL\t[$]1",-"SETB"
|
|
// ppc64x:"RLDICL",-"CMP",-"ISEL"
|
|
b := x&1 != 0
|
|
return c && b
|
|
}
|
|
|
|
func convertNeqBool32(x uint32) bool {
|
|
// ppc64x:"RLDICL",-"CMPW",-"ISEL"
|
|
return x&1 != 0
|
|
}
|
|
|
|
func convertEqBool32(x uint32) bool {
|
|
// ppc64x:"RLDICL",-"CMPW","XOR",-"ISEL"
|
|
return x&1 == 0
|
|
}
|
|
|
|
func convertNeqBool64(x uint64) bool {
|
|
// ppc64x:"RLDICL",-"CMP",-"ISEL"
|
|
return x&1 != 0
|
|
}
|
|
|
|
func convertEqBool64(x uint64) bool {
|
|
// ppc64x:"RLDICL","XOR",-"CMP",-"ISEL"
|
|
return x&1 == 0
|
|
}
|
|
|
|
func TestSetEq64(x uint64, y uint64) bool {
|
|
// ppc64x/power10:"SETBC\tCR0EQ",-"ISEL"
|
|
// ppc64x/power9:"CMP","ISEL",-"SETBC\tCR0EQ"
|
|
// ppc64x/power8:"CMP","ISEL",-"SETBC\tCR0EQ"
|
|
b := x == y
|
|
return b
|
|
}
|
|
func TestSetNeq64(x uint64, y uint64) bool {
|
|
// ppc64x/power10:"SETBCR\tCR0EQ",-"ISEL"
|
|
// ppc64x/power9:"CMP","ISEL",-"SETBCR\tCR0EQ"
|
|
// ppc64x/power8:"CMP","ISEL",-"SETBCR\tCR0EQ"
|
|
b := x != y
|
|
return b
|
|
}
|
|
func TestSetLt64(x uint64, y uint64) bool {
|
|
// ppc64x/power10:"SETBC\tCR0GT",-"ISEL"
|
|
// ppc64x/power9:"CMP","ISEL",-"SETBC\tCR0GT"
|
|
// ppc64x/power8:"CMP","ISEL",-"SETBC\tCR0GT"
|
|
b := x < y
|
|
return b
|
|
}
|
|
func TestSetLe64(x uint64, y uint64) bool {
|
|
// ppc64x/power10:"SETBCR\tCR0LT",-"ISEL"
|
|
// ppc64x/power9:"CMP","ISEL",-"SETBCR\tCR0LT"
|
|
// ppc64x/power8:"CMP","ISEL",-"SETBCR\tCR0LT"
|
|
b := x <= y
|
|
return b
|
|
}
|
|
func TestSetGt64(x uint64, y uint64) bool {
|
|
// ppc64x/power10:"SETBC\tCR0LT",-"ISEL"
|
|
// ppc64x/power9:"CMP","ISEL",-"SETBC\tCR0LT"
|
|
// ppc64x/power8:"CMP","ISEL",-"SETBC\tCR0LT"
|
|
b := x > y
|
|
return b
|
|
}
|
|
func TestSetGe64(x uint64, y uint64) bool {
|
|
// ppc64x/power10:"SETBCR\tCR0GT",-"ISEL"
|
|
// ppc64x/power9:"CMP","ISEL",-"SETBCR\tCR0GT"
|
|
// ppc64x/power8:"CMP","ISEL",-"SETBCR\tCR0GT"
|
|
b := x >= y
|
|
return b
|
|
}
|
|
func TestSetLtFp64(x float64, y float64) bool {
|
|
// ppc64x/power10:"SETBC\tCR0LT",-"ISEL"
|
|
// ppc64x/power9:"FCMP","ISEL",-"SETBC\tCR0LT"
|
|
// ppc64x/power8:"FCMP","ISEL",-"SETBC\tCR0LT"
|
|
b := x < y
|
|
return b
|
|
}
|
|
func TestSetLeFp64(x float64, y float64) bool {
|
|
// ppc64x/power10:"SETBC\tCR0LT","SETBC\tCR0EQ","OR",-"ISEL",-"ISEL"
|
|
// ppc64x/power9:"ISEL","ISEL",-"SETBC\tCR0LT",-"SETBC\tCR0EQ","OR"
|
|
// ppc64x/power8:"ISEL","ISEL",-"SETBC\tCR0LT",-"SETBC\tCR0EQ","OR"
|
|
b := x <= y
|
|
return b
|
|
}
|
|
func TestSetGtFp64(x float64, y float64) bool {
|
|
// ppc64x/power10:"SETBC\tCR0LT",-"ISEL"
|
|
// ppc64x/power9:"FCMP","ISEL",-"SETBC\tCR0LT"
|
|
// ppc64x/power8:"FCMP","ISEL",-"SETBC\tCR0LT"
|
|
b := x > y
|
|
return b
|
|
}
|
|
func TestSetGeFp64(x float64, y float64) bool {
|
|
// ppc64x/power10:"SETBC\tCR0LT","SETBC\tCR0EQ","OR",-"ISEL",-"ISEL"
|
|
// ppc64x/power9:"ISEL","ISEL",-"SETBC\tCR0LT",-"SETBC\tCR0EQ","OR"
|
|
// ppc64x/power8:"ISEL","ISEL",-"SETBC\tCR0LT",-"SETBC\tCR0EQ","OR"
|
|
b := x >= y
|
|
return b
|
|
}
|
|
func TestSetInvEq64(x uint64, y uint64) bool {
|
|
// ppc64x/power10:"SETBCR\tCR0EQ",-"ISEL"
|
|
// ppc64x/power9:"CMP","ISEL",-"SETBCR\tCR0EQ"
|
|
// ppc64x/power8:"CMP","ISEL",-"SETBCR\tCR0EQ"
|
|
b := !(x == y)
|
|
return b
|
|
}
|
|
func TestSetInvNeq64(x uint64, y uint64) bool {
|
|
// ppc64x/power10:"SETBC\tCR0EQ",-"ISEL"
|
|
// ppc64x/power9:"CMP","ISEL",-"SETBC\tCR0EQ"
|
|
// ppc64x/power8:"CMP","ISEL",-"SETBC\tCR0EQ"
|
|
b := !(x != y)
|
|
return b
|
|
}
|
|
func TestSetInvLt64(x uint64, y uint64) bool {
|
|
// ppc64x/power10:"SETBCR\tCR0GT",-"ISEL"
|
|
// ppc64x/power9:"CMP","ISEL",-"SETBCR\tCR0GT"
|
|
// ppc64x/power8:"CMP","ISEL",-"SETBCR\tCR0GT"
|
|
b := !(x < y)
|
|
return b
|
|
}
|
|
func TestSetInvLe64(x uint64, y uint64) bool {
|
|
// ppc64x/power10:"SETBC\tCR0LT",-"ISEL"
|
|
// ppc64x/power9:"CMP","ISEL",-"SETBC\tCR0LT"
|
|
// ppc64x/power8:"CMP","ISEL",-"SETBC\tCR0LT"
|
|
b := !(x <= y)
|
|
return b
|
|
}
|
|
func TestSetInvGt64(x uint64, y uint64) bool {
|
|
// ppc64x/power10:"SETBCR\tCR0LT",-"ISEL"
|
|
// ppc64x/power9:"CMP","ISEL",-"SETBCR\tCR0LT"
|
|
// ppc64x/power8:"CMP","ISEL",-"SETBCR\tCR0LT"
|
|
b := !(x > y)
|
|
return b
|
|
}
|
|
func TestSetInvGe64(x uint64, y uint64) bool {
|
|
// ppc64x/power10:"SETBC\tCR0GT",-"ISEL"
|
|
// ppc64x/power9:"CMP","ISEL",-"SETBC\tCR0GT"
|
|
// ppc64x/power8:"CMP","ISEL",-"SETBC\tCR0GT"
|
|
b := !(x >= y)
|
|
return b
|
|
}
|
|
|
|
func TestSetInvEqFp64(x float64, y float64) bool {
|
|
// ppc64x/power10:"SETBCR\tCR0EQ",-"ISEL"
|
|
// ppc64x/power9:"FCMP","ISEL",-"SETBCR\tCR0EQ"
|
|
// ppc64x/power8:"FCMP","ISEL",-"SETBCR\tCR0EQ"
|
|
b := !(x == y)
|
|
return b
|
|
}
|
|
func TestSetInvNeqFp64(x float64, y float64) bool {
|
|
// ppc64x/power10:"SETBC\tCR0EQ",-"ISEL"
|
|
// ppc64x/power9:"FCMP","ISEL",-"SETBC\tCR0EQ"
|
|
// ppc64x/power8:"FCMP","ISEL",-"SETBC\tCR0EQ"
|
|
b := !(x != y)
|
|
return b
|
|
}
|
|
func TestSetInvLtFp64(x float64, y float64) bool {
|
|
// ppc64x/power10:"SETBCR\tCR0LT",-"ISEL"
|
|
// ppc64x/power9:"FCMP","ISEL",-"SETBCR\tCR0LT"
|
|
// ppc64x/power8:"FCMP","ISEL",-"SETBCR\tCR0LT"
|
|
b := !(x < y)
|
|
return b
|
|
}
|
|
func TestSetInvLeFp64(x float64, y float64) bool {
|
|
// ppc64x/power10:"SETBC\tCR0LT",-"ISEL"
|
|
// ppc64x/power9:"FCMP","ISEL",-"SETBC\tCR0LT"
|
|
// ppc64x/power8:"FCMP","ISEL",-"SETBC\tCR0LT"
|
|
b := !(x <= y)
|
|
return b
|
|
}
|
|
func TestSetInvGtFp64(x float64, y float64) bool {
|
|
// ppc64x/power10:"SETBCR\tCR0LT",-"ISEL"
|
|
// ppc64x/power9:"FCMP","ISEL",-"SETBCR\tCR0LT"
|
|
// ppc64x/power8:"FCMP","ISEL",-"SETBCR\tCR0LT"
|
|
b := !(x > y)
|
|
return b
|
|
}
|
|
func TestSetInvGeFp64(x float64, y float64) bool {
|
|
// ppc64x/power10:"SETBC\tCR0LT",-"ISEL"
|
|
// ppc64x/power9:"FCMP","ISEL",-"SETBC\tCR0LT"
|
|
// ppc64x/power8:"FCMP","ISEL",-"SETBC\tCR0LT"
|
|
b := !(x >= y)
|
|
return b
|
|
}
|
|
func TestLogicalCompareZero(x *[64]uint64) {
|
|
// ppc64x:"ANDCC",^"AND"
|
|
b := x[0] & 3
|
|
if b != 0 {
|
|
x[0] = b
|
|
}
|
|
// ppc64x:"ANDCC",^"AND"
|
|
b = x[1] & x[2]
|
|
if b != 0 {
|
|
x[1] = b
|
|
}
|
|
// ppc64x:"ANDNCC",^"ANDN"
|
|
b = x[1] &^ x[2]
|
|
if b != 0 {
|
|
x[1] = b
|
|
}
|
|
// ppc64x:"ORCC",^"OR"
|
|
b = x[3] | x[4]
|
|
if b != 0 {
|
|
x[3] = b
|
|
}
|
|
// ppc64x:"SUBCC",^"SUB"
|
|
b = x[5] - x[6]
|
|
if b != 0 {
|
|
x[5] = b
|
|
}
|
|
// ppc64x:"NORCC",^"NOR"
|
|
b = ^(x[5] | x[6])
|
|
if b != 0 {
|
|
x[5] = b
|
|
}
|
|
// ppc64x:"XORCC",^"XOR"
|
|
b = x[7] ^ x[8]
|
|
if b != 0 {
|
|
x[7] = b
|
|
}
|
|
// ppc64x:"ADDCC",^"ADD"
|
|
b = x[9] + x[10]
|
|
if b != 0 {
|
|
x[9] = b
|
|
}
|
|
// ppc64x:"NEGCC",^"NEG"
|
|
b = -x[11]
|
|
if b != 0 {
|
|
x[11] = b
|
|
}
|
|
// ppc64x:"CNTLZDCC",^"CNTLZD"
|
|
b = uint64(bits.LeadingZeros64(x[12]))
|
|
if b != 0 {
|
|
x[12] = b
|
|
}
|
|
|
|
// ppc64x:"ADDCCC\t[$]4,"
|
|
c := int64(x[12]) + 4
|
|
if c <= 0 {
|
|
x[12] = uint64(c)
|
|
}
|
|
|
|
}
|
|
|
|
func constantWrite(b bool, p *bool) {
|
|
if b {
|
|
// amd64:`MOVB\t[$]1, \(`
|
|
*p = b
|
|
}
|
|
}
|