Adding upstream version 1.20.14.upstream/1.20.14upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 439 insertions, 0 deletions

diff --git a/src/runtime/iface_test.go b/src/runtime/iface_test.go
new file mode 100644
index 0000000..06f6eeb
--- /dev/null
+++ b/src/runtime/iface_test.go
@@ -0,0 +1,439 @@
+// Copyright 2012 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 runtime_test
+
+import (
+	"runtime"
+	"testing"
+)
+
+type I1 interface {
+	Method1()
+}
+
+type I2 interface {
+	Method1()
+	Method2()
+}
+
+type TS uint16
+type TM uintptr
+type TL [2]uintptr
+
+func (TS) Method1() {}
+func (TS) Method2() {}
+func (TM) Method1() {}
+func (TM) Method2() {}
+func (TL) Method1() {}
+func (TL) Method2() {}
+
+type T8 uint8
+type T16 uint16
+type T32 uint32
+type T64 uint64
+type Tstr string
+type Tslice []byte
+
+func (T8) Method1()     {}
+func (T16) Method1()    {}
+func (T32) Method1()    {}
+func (T64) Method1()    {}
+func (Tstr) Method1()   {}
+func (Tslice) Method1() {}
+
+var (
+	e  any
+	e_ any
+	i1 I1
+	i2 I2
+	ts TS
+	tm TM
+	tl TL
+	ok bool
+)
+
+// Issue 9370
+func TestCmpIfaceConcreteAlloc(t *testing.T) {
+	if runtime.Compiler != "gc" {
+		t.Skip("skipping on non-gc compiler")
+	}
+
+	n := testing.AllocsPerRun(1, func() {
+		_ = e == ts
+		_ = i1 == ts
+		_ = e == 1
+	})
+
+	if n > 0 {
+		t.Fatalf("iface cmp allocs=%v; want 0", n)
+	}
+}
+
+func BenchmarkEqEfaceConcrete(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		_ = e == ts
+	}
+}
+
+func BenchmarkEqIfaceConcrete(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		_ = i1 == ts
+	}
+}
+
+func BenchmarkNeEfaceConcrete(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		_ = e != ts
+	}
+}
+
+func BenchmarkNeIfaceConcrete(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		_ = i1 != ts
+	}
+}
+
+func BenchmarkConvT2EByteSized(b *testing.B) {
+	b.Run("bool", func(b *testing.B) {
+		for i := 0; i < b.N; i++ {
+			e = yes
+		}
+	})
+	b.Run("uint8", func(b *testing.B) {
+		for i := 0; i < b.N; i++ {
+			e = eight8
+		}
+	})
+}
+
+func BenchmarkConvT2ESmall(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		e = ts
+	}
+}
+
+func BenchmarkConvT2EUintptr(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		e = tm
+	}
+}
+
+func BenchmarkConvT2ELarge(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		e = tl
+	}
+}
+
+func BenchmarkConvT2ISmall(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		i1 = ts
+	}
+}
+
+func BenchmarkConvT2IUintptr(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		i1 = tm
+	}
+}
+
+func BenchmarkConvT2ILarge(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		i1 = tl
+	}
+}
+
+func BenchmarkConvI2E(b *testing.B) {
+	i2 = tm
+	for i := 0; i < b.N; i++ {
+		e = i2
+	}
+}
+
+func BenchmarkConvI2I(b *testing.B) {
+	i2 = tm
+	for i := 0; i < b.N; i++ {
+		i1 = i2
+	}
+}
+
+func BenchmarkAssertE2T(b *testing.B) {
+	e = tm
+	for i := 0; i < b.N; i++ {
+		tm = e.(TM)
+	}
+}
+
+func BenchmarkAssertE2TLarge(b *testing.B) {
+	e = tl
+	for i := 0; i < b.N; i++ {
+		tl = e.(TL)
+	}
+}
+
+func BenchmarkAssertE2I(b *testing.B) {
+	e = tm
+	for i := 0; i < b.N; i++ {
+		i1 = e.(I1)
+	}
+}
+
+func BenchmarkAssertI2T(b *testing.B) {
+	i1 = tm
+	for i := 0; i < b.N; i++ {
+		tm = i1.(TM)
+	}
+}
+
+func BenchmarkAssertI2I(b *testing.B) {
+	i1 = tm
+	for i := 0; i < b.N; i++ {
+		i2 = i1.(I2)
+	}
+}
+
+func BenchmarkAssertI2E(b *testing.B) {
+	i1 = tm
+	for i := 0; i < b.N; i++ {
+		e = i1.(any)
+	}
+}
+
+func BenchmarkAssertE2E(b *testing.B) {
+	e = tm
+	for i := 0; i < b.N; i++ {
+		e_ = e
+	}
+}
+
+func BenchmarkAssertE2T2(b *testing.B) {
+	e = tm
+	for i := 0; i < b.N; i++ {
+		tm, ok = e.(TM)
+	}
+}
+
+func BenchmarkAssertE2T2Blank(b *testing.B) {
+	e = tm
+	for i := 0; i < b.N; i++ {
+		_, ok = e.(TM)
+	}
+}
+
+func BenchmarkAssertI2E2(b *testing.B) {
+	i1 = tm
+	for i := 0; i < b.N; i++ {
+		e, ok = i1.(any)
+	}
+}
+
+func BenchmarkAssertI2E2Blank(b *testing.B) {
+	i1 = tm
+	for i := 0; i < b.N; i++ {
+		_, ok = i1.(any)
+	}
+}
+
+func BenchmarkAssertE2E2(b *testing.B) {
+	e = tm
+	for i := 0; i < b.N; i++ {
+		e_, ok = e.(any)
+	}
+}
+
+func BenchmarkAssertE2E2Blank(b *testing.B) {
+	e = tm
+	for i := 0; i < b.N; i++ {
+		_, ok = e.(any)
+	}
+}
+
+func TestNonEscapingConvT2E(t *testing.T) {
+	m := make(map[any]bool)
+	m[42] = true
+	if !m[42] {
+		t.Fatalf("42 is not present in the map")
+	}
+	if m[0] {
+		t.Fatalf("0 is present in the map")
+	}
+
+	n := testing.AllocsPerRun(1000, func() {
+		if m[0] {
+			t.Fatalf("0 is present in the map")
+		}
+	})
+	if n != 0 {
+		t.Fatalf("want 0 allocs, got %v", n)
+	}
+}
+
+func TestNonEscapingConvT2I(t *testing.T) {
+	m := make(map[I1]bool)
+	m[TM(42)] = true
+	if !m[TM(42)] {
+		t.Fatalf("42 is not present in the map")
+	}
+	if m[TM(0)] {
+		t.Fatalf("0 is present in the map")
+	}
+
+	n := testing.AllocsPerRun(1000, func() {
+		if m[TM(0)] {
+			t.Fatalf("0 is present in the map")
+		}
+	})
+	if n != 0 {
+		t.Fatalf("want 0 allocs, got %v", n)
+	}
+}
+
+func TestZeroConvT2x(t *testing.T) {
+	tests := []struct {
+		name string
+		fn   func()
+	}{
+		{name: "E8", fn: func() { e = eight8 }},  // any byte-sized value does not allocate
+		{name: "E16", fn: func() { e = zero16 }}, // zero values do not allocate
+		{name: "E32", fn: func() { e = zero32 }},
+		{name: "E64", fn: func() { e = zero64 }},
+		{name: "Estr", fn: func() { e = zerostr }},
+		{name: "Eslice", fn: func() { e = zeroslice }},
+		{name: "Econstflt", fn: func() { e = 99.0 }}, // constants do not allocate
+		{name: "Econststr", fn: func() { e = "change" }},
+		{name: "I8", fn: func() { i1 = eight8I }},
+		{name: "I16", fn: func() { i1 = zero16I }},
+		{name: "I32", fn: func() { i1 = zero32I }},
+		{name: "I64", fn: func() { i1 = zero64I }},
+		{name: "Istr", fn: func() { i1 = zerostrI }},
+		{name: "Islice", fn: func() { i1 = zerosliceI }},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			n := testing.AllocsPerRun(1000, test.fn)
+			if n != 0 {
+				t.Errorf("want zero allocs, got %v", n)
+			}
+		})
+	}
+}
+
+var (
+	eight8  uint8 = 8
+	eight8I T8    = 8
+	yes     bool  = true
+
+	zero16     uint16 = 0
+	zero16I    T16    = 0
+	one16      uint16 = 1
+	thousand16 uint16 = 1000
+
+	zero32     uint32 = 0
+	zero32I    T32    = 0
+	one32      uint32 = 1
+	thousand32 uint32 = 1000
+
+	zero64     uint64 = 0
+	zero64I    T64    = 0
+	one64      uint64 = 1
+	thousand64 uint64 = 1000
+
+	zerostr  string = ""
+	zerostrI Tstr   = ""
+	nzstr    string = "abc"
+
+	zeroslice  []byte = nil
+	zerosliceI Tslice = nil
+	nzslice    []byte = []byte("abc")
+
+	zerobig [512]byte
+	nzbig   [512]byte = [512]byte{511: 1}
+)
+
+func BenchmarkConvT2Ezero(b *testing.B) {
+	b.Run("zero", func(b *testing.B) {
+		b.Run("16", func(b *testing.B) {
+			for i := 0; i < b.N; i++ {
+				e = zero16
+			}
+		})
+		b.Run("32", func(b *testing.B) {
+			for i := 0; i < b.N; i++ {
+				e = zero32
+			}
+		})
+		b.Run("64", func(b *testing.B) {
+			for i := 0; i < b.N; i++ {
+				e = zero64
+			}
+		})
+		b.Run("str", func(b *testing.B) {
+			for i := 0; i < b.N; i++ {
+				e = zerostr
+			}
+		})
+		b.Run("slice", func(b *testing.B) {
+			for i := 0; i < b.N; i++ {
+				e = zeroslice
+			}
+		})
+		b.Run("big", func(b *testing.B) {
+			for i := 0; i < b.N; i++ {
+				e = zerobig
+			}
+		})
+	})
+	b.Run("nonzero", func(b *testing.B) {
+		b.Run("str", func(b *testing.B) {
+			for i := 0; i < b.N; i++ {
+				e = nzstr
+			}
+		})
+		b.Run("slice", func(b *testing.B) {
+			for i := 0; i < b.N; i++ {
+				e = nzslice
+			}
+		})
+		b.Run("big", func(b *testing.B) {
+			for i := 0; i < b.N; i++ {
+				e = nzbig
+			}
+		})
+	})
+	b.Run("smallint", func(b *testing.B) {
+		b.Run("16", func(b *testing.B) {
+			for i := 0; i < b.N; i++ {
+				e = one16
+			}
+		})
+		b.Run("32", func(b *testing.B) {
+			for i := 0; i < b.N; i++ {
+				e = one32
+			}
+		})
+		b.Run("64", func(b *testing.B) {
+			for i := 0; i < b.N; i++ {
+				e = one64
+			}
+		})
+	})
+	b.Run("largeint", func(b *testing.B) {
+		b.Run("16", func(b *testing.B) {
+			for i := 0; i < b.N; i++ {
+				e = thousand16
+			}
+		})
+		b.Run("32", func(b *testing.B) {
+			for i := 0; i < b.N; i++ {
+				e = thousand32
+			}
+		})
+		b.Run("64", func(b *testing.B) {
+			for i := 0; i < b.N; i++ {
+				e = thousand64
+			}
+		})
+	})
+}