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mirror of https://github.com/golang/go synced 2024-11-22 11:04:40 -07:00
go/test/fuse.go
Jorropo bbd0bc22ea cmd/compile: improve integer comparisons with numeric bounds
This do:
- Fold always false or always true comparisons for ints and uint.
- Reduce < and <= where the true set is only one value to == with such value.

Change-Id: Ie9e3f70efd1845bef62db56543f051a50ad2532e
Reviewed-on: https://go-review.googlesource.com/c/go/+/555135
Auto-Submit: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2024-01-23 00:02:36 +00:00

192 lines
5.3 KiB
Go

// errorcheck -0 -d=ssa/late_fuse/debug=1
//go:build (amd64 && !gcflags_noopt) || (arm64 && !gcflags_noopt)
// Copyright 2021 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 main
import "strings"
const Cf2 = 2.0
func fEqEq(a int, f float64) bool {
return a == 0 && f > Cf2 || a == 0 && f < -Cf2 // ERROR "Redirect Eq64 based on Eq64$"
}
func fEqNeq(a int32, f float64) bool {
return a == 0 && f > Cf2 || a != 0 && f < -Cf2 // ERROR "Redirect Neq32 based on Eq32$"
}
func fEqLess(a int8, f float64) bool {
return a == 0 && f > Cf2 || a < 0 && f < -Cf2
}
func fEqLeq(a float64, f float64) bool {
return a == 0 && f > Cf2 || a <= 0 && f < -Cf2
}
func fEqLessU(a uint, f float64) bool {
return a == 0 && f > Cf2 || a < 0 && f < -Cf2
}
func fEqLeqU(a uint64, f float64) bool {
return a == 0 && f > Cf2 || a <= 0 && f < -Cf2 // ERROR "Redirect Eq64 based on Eq64$"
}
func fNeqEq(a int, f float64) bool {
return a != 0 && f > Cf2 || a == 0 && f < -Cf2 // ERROR "Redirect Eq64 based on Neq64$"
}
func fNeqNeq(a int32, f float64) bool {
return a != 0 && f > Cf2 || a != 0 && f < -Cf2 // ERROR "Redirect Neq32 based on Neq32$"
}
func fNeqLess(a float32, f float64) bool {
// TODO: Add support for floating point numbers in prove
return a != 0 && f > Cf2 || a < 0 && f < -Cf2
}
func fNeqLeq(a int16, f float64) bool {
return a != 0 && f > Cf2 || a <= 0 && f < -Cf2 // ERROR "Redirect Leq16 based on Neq16$"
}
func fNeqLessU(a uint, f float64) bool {
return a != 0 && f > Cf2 || a < 0 && f < -Cf2
}
func fNeqLeqU(a uint32, f float64) bool {
return a != 2 && f > Cf2 || a <= 2 && f < -Cf2 // ERROR "Redirect Leq32U based on Neq32$"
}
func fLessEq(a int, f float64) bool {
return a < 0 && f > Cf2 || a == 0 && f < -Cf2
}
func fLessNeq(a int32, f float64) bool {
return a < 0 && f > Cf2 || a != 0 && f < -Cf2
}
func fLessLess(a float32, f float64) bool {
return a < 0 && f > Cf2 || a < 0 && f < -Cf2 // ERROR "Redirect Less32F based on Less32F$"
}
func fLessLeq(a float64, f float64) bool {
return a < 0 && f > Cf2 || a <= 0 && f < -Cf2
}
func fLeqEq(a float64, f float64) bool {
return a <= 0 && f > Cf2 || a == 0 && f < -Cf2
}
func fLeqNeq(a int16, f float64) bool {
return a <= 0 && f > Cf2 || a != 0 && f < -Cf2 // ERROR "Redirect Neq16 based on Leq16$"
}
func fLeqLess(a float32, f float64) bool {
return a <= 0 && f > Cf2 || a < 0 && f < -Cf2
}
func fLeqLeq(a int8, f float64) bool {
return a <= 0 && f > Cf2 || a <= 0 && f < -Cf2 // ERROR "Redirect Leq8 based on Leq8$"
}
func fLessUEq(a uint8, f float64) bool {
return a < 0 && f > Cf2 || a == 0 && f < -Cf2
}
func fLessUNeq(a uint16, f float64) bool {
return a < 0 && f > Cf2 || a != 0 && f < -Cf2
}
func fLessULessU(a uint32, f float64) bool {
return a < 0 && f > Cf2 || a < 0 && f < -Cf2
}
func fLessULeqU(a uint64, f float64) bool {
return a < 0 && f > Cf2 || a <= 0 && f < -Cf2
}
func fLeqUEq(a uint8, f float64) bool {
return a <= 2 && f > Cf2 || a == 2 && f < -Cf2 // ERROR "Redirect Eq8 based on Leq8U$"
}
func fLeqUNeq(a uint16, f float64) bool {
return a <= 2 && f > Cf2 || a != 2 && f < -Cf2 // ERROR "Redirect Neq16 based on Leq16U$"
}
func fLeqLessU(a uint32, f float64) bool {
return a <= 0 && f > Cf2 || a < 0 && f < -Cf2
}
func fLeqLeqU(a uint64, f float64) bool {
return a <= 2 && f > Cf2 || a <= 2 && f < -Cf2 // ERROR "Redirect Leq64U based on Leq64U$"
}
// Arg tests are disabled because the op name is different on amd64 and arm64.
func fEqPtrEqPtr(a, b *int, f float64) bool {
return a == b && f > Cf2 || a == b && f < -Cf2 // ERROR "Redirect EqPtr based on EqPtr$"
}
func fEqPtrNeqPtr(a, b *int, f float64) bool {
return a == b && f > Cf2 || a != b && f < -Cf2 // ERROR "Redirect NeqPtr based on EqPtr$"
}
func fNeqPtrEqPtr(a, b *int, f float64) bool {
return a != b && f > Cf2 || a == b && f < -Cf2 // ERROR "Redirect EqPtr based on NeqPtr$"
}
func fNeqPtrNeqPtr(a, b *int, f float64) bool {
return a != b && f > Cf2 || a != b && f < -Cf2 // ERROR "Redirect NeqPtr based on NeqPtr$"
}
func fEqInterEqInter(a interface{}, f float64) bool {
return a == nil && f > Cf2 || a == nil && f < -Cf2 // ERROR "Redirect IsNonNil based on IsNonNil$"
}
func fEqInterNeqInter(a interface{}, f float64) bool {
return a == nil && f > Cf2 || a != nil && f < -Cf2
}
func fNeqInterEqInter(a interface{}, f float64) bool {
return a != nil && f > Cf2 || a == nil && f < -Cf2
}
func fNeqInterNeqInter(a interface{}, f float64) bool {
return a != nil && f > Cf2 || a != nil && f < -Cf2 // ERROR "Redirect IsNonNil based on IsNonNil$"
}
func fEqSliceEqSlice(a []int, f float64) bool {
return a == nil && f > Cf2 || a == nil && f < -Cf2 // ERROR "Redirect IsNonNil based on IsNonNil$"
}
func fEqSliceNeqSlice(a []int, f float64) bool {
return a == nil && f > Cf2 || a != nil && f < -Cf2
}
func fNeqSliceEqSlice(a []int, f float64) bool {
return a != nil && f > Cf2 || a == nil && f < -Cf2
}
func fNeqSliceNeqSlice(a []int, f float64) bool {
return a != nil && f > Cf2 || a != nil && f < -Cf2 // ERROR "Redirect IsNonNil based on IsNonNil$"
}
func fPhi(a, b string) string {
aslash := strings.HasSuffix(a, "/") // ERROR "Redirect Phi based on Phi$"
bslash := strings.HasPrefix(b, "/")
switch {
case aslash && bslash:
return a + b[1:]
case !aslash && !bslash:
return a + "/" + b
}
return a + b
}
func main() {
}