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cmd/compile/internal/test: update abi tests for recent spec changes

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The internal ABI spec was recently updated to include specific
language covering "past-the-end" pointers and structs containing
trailing zero-sized fields. Add a unit test that makes sure we do the
right thing in this case. Fix a couple comments in other unit tests.

Change-Id: I18d373d11e122aec74b316837843887272676c63
Reviewed-on: https://go-review.googlesource.com/c/go/+/303809
Trust: Than McIntosh <thanm@google.com>
Run-TryBot: Than McIntosh <thanm@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
This commit is contained in:
Than McIntosh 2021-01-26 08:24:00 -05:00
parent c59b17e5a2
commit 2887ef499a
1 changed files with 71 additions and 5 deletions
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76
src/cmd/compile/internal/test/abiutils_test.go
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@ -55,7 +55,14 @@ func TestABIUtilsBasic1(t *testing.T) {
}
func TestABIUtilsBasic2(t *testing.T) {
// func(x int32, y float64) (int32, float64, float64)
// func(p1 int8, p2 int16, p3 int32, p4 int64,
// p5 float32, p6 float32, p7 float64, p8 float64,
// p9 int8, p10 int16, p11 int32, p12 int64,
// p13 float32, p14 float32, p15 float64, p16 float64,
// p17 complex128, p18 complex128, p19 complex12, p20 complex128,
// p21 complex64, p22 int8, p23 in16, p24 int32, p25 int64,
// p26 int8, p27 in16, p28 int32, p29 int64)
// (r1 int32, r2 float64, r3 float64) {
i8 := types.Types[types.TINT8]
i16 := types.Types[types.TINT16]
i32 := types.Types[types.TINT32]
@ -114,6 +121,8 @@ func TestABIUtilsBasic2(t *testing.T) {
}
func TestABIUtilsArrays(t *testing.T) {
// func(p1 [1]int32, p2 [0]int32, p3 [1][1]int32, p4 [2]int32)
// (r1 [2]int32, r2 [1]int32, r3 [0]int32, r4 [1][1]int32) {
i32 := types.Types[types.TINT32]
ae := types.NewArray(i32, 0)
a1 := types.NewArray(i32, 1)
@ -138,6 +147,9 @@ func TestABIUtilsArrays(t *testing.T) {
}
func TestABIUtilsStruct1(t *testing.T) {
// type s struct { f1 int8; f2 int8; f3 struct {}; f4 int8; f5 int16) }
// func(p1 int6, p2 s, p3 int64)
// (r1 s, r2 int8, r3 int32) {
i8 := types.Types[types.TINT8]
i16 := types.Types[types.TINT16]
i32 := types.Types[types.TINT32]
@ -160,6 +172,10 @@ func TestABIUtilsStruct1(t *testing.T) {
}
func TestABIUtilsStruct2(t *testing.T) {
// type s struct { f1 int64; f2 struct { } }
// type fs struct { f1 float64; f2 s; f3 struct { } }
// func(p1 s, p2 s, p3 fs)
// (r1 fs, r2 fs)
f64 := types.Types[types.TFLOAT64]
i64 := types.Types[types.TINT64]
s := mkstruct([]*types.Type{i64, mkstruct([]*types.Type{})})
@ -179,7 +195,53 @@ func TestABIUtilsStruct2(t *testing.T) {
abitest(t, ft, exp)
}
// TestABIUtilsEmptyFieldAtEndOfStruct is testing to make sure
// the abi code is doing the right thing for struct types that have
// a trailing zero-sized field (where the we need to add padding).
func TestABIUtilsEmptyFieldAtEndOfStruct(t *testing.T) {
// type s struct { f1 [2]int64; f2 struct { } }
// type s2 struct { f1 [3]int16; f2 struct { } }
// type fs struct { f1 float64; f s; f3 struct { } }
// func(p1 s, p2 s, p3 fs) (r1 fs, r2 fs)
f64 := types.Types[types.TFLOAT64]
i64 := types.Types[types.TINT64]
i16 := types.Types[types.TINT16]
tb := types.Types[types.TBOOL]
ab2 := types.NewArray(tb, 2)
a2 := types.NewArray(i64, 2)
a3 := types.NewArray(i16, 3)
s := mkstruct([]*types.Type{a2, mkstruct([]*types.Type{})})
s2 := mkstruct([]*types.Type{a3, mkstruct([]*types.Type{})})
fs := mkstruct([]*types.Type{f64, s, mkstruct([]*types.Type{})})
ft := mkFuncType(nil, []*types.Type{s, ab2, s2, fs, fs},
[]*types.Type{fs, ab2, fs})
exp := makeExpectedDump(`
IN 0: R{ } offset: 0 typ: struct { [2]int64; struct {} }
IN 1: R{ } offset: 24 typ: [2]bool
IN 2: R{ } offset: 26 typ: struct { [3]int16; struct {} }
IN 3: R{ } offset: 40 typ: struct { float64; struct { [2]int64; struct {} }; struct {} }
IN 4: R{ } offset: 80 typ: struct { float64; struct { [2]int64; struct {} }; struct {} }
OUT 0: R{ } offset: 120 typ: struct { float64; struct { [2]int64; struct {} }; struct {} }
OUT 1: R{ } offset: 160 typ: [2]bool
OUT 2: R{ } offset: 168 typ: struct { float64; struct { [2]int64; struct {} }; struct {} }
offsetToSpillArea: 208 spillAreaSize: 0
`)
abitest(t, ft, exp)
// Check to make sure that NumParamRegs yields 2 and not 3
// for struct "s" (e.g. that it handles the padding properly).
nps := configAMD64.NumParamRegs(s)
if nps != 2 {
t.Errorf("NumParams(%v) returned %d expected %d\n",
s, nps, 2)
}
}
func TestABIUtilsSliceString(t *testing.T) {
// func(p1 []int32, p2 int8, p3 []int32, p4 int8, p5 string,
// p6 int64, p6 []intr32) (r1 string, r2 int64, r3 string, r4 []int32)
i32 := types.Types[types.TINT32]
sli32 := types.NewSlice(i32)
str := types.New(types.TSTRING)
@ -208,10 +270,12 @@ func TestABIUtilsSliceString(t *testing.T) {
}
func TestABIUtilsMethod(t *testing.T) {
// type s1 struct { f1 int16; f2 int16; f3 int16 }
// func(p1 *s1, p2 [7]*s1, p3 float64, p4 int16, p5 int16, p6 int16)
// (r1 [7]*s1, r2 float64, r3 int64)
i16 := types.Types[types.TINT16]
i64 := types.Types[types.TINT64]
f64 := types.Types[types.TFLOAT64]
s1 := mkstruct([]*types.Type{i16, i16, i16})
ps1 := types.NewPtr(s1)
a7 := types.NewArray(ps1, 7)
@ -236,18 +300,20 @@ func TestABIUtilsMethod(t *testing.T) {
}
func TestABIUtilsInterfaces(t *testing.T) {
// type s1 { f1 int16; f2 int16; f3 bool)
// type nei interface { ...() string }
// func(p1 s1, p2 interface{}, p3 interface{}, p4 nei,
// p5 *interface{}, p6 nei, p7 int64)
// (r1 interface{}, r2 nei, r3 bool)
ei := types.Types[types.TINTER] // interface{}
pei := types.NewPtr(ei) // *interface{}
fldt := mkFuncType(types.FakeRecvType(), []*types.Type{},
[]*types.Type{types.UntypedString})
field := types.NewField(src.NoXPos, nil, fldt)
// interface{ ...() string }
nei := types.NewInterface(types.LocalPkg, []*types.Field{field})
i16 := types.Types[types.TINT16]
tb := types.Types[types.TBOOL]
s1 := mkstruct([]*types.Type{i16, i16, tb})
ft := mkFuncType(nil, []*types.Type{s1, ei, ei, nei, pei, nei, i16},
[]*types.Type{ei, nei, pei})