diff options
Diffstat (limited to 'src/cmd/compile/internal/test/abiutils_test.go')
| -rw-r--r-- | src/cmd/compile/internal/test/abiutils_test.go | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/src/cmd/compile/internal/test/abiutils_test.go b/src/cmd/compile/internal/test/abiutils_test.go index daff99a799..b752c48612 100644 --- a/src/cmd/compile/internal/test/abiutils_test.go +++ b/src/cmd/compile/internal/test/abiutils_test.go @@ -14,6 +14,7 @@ import ( "cmd/internal/obj" "cmd/internal/obj/x86" "cmd/internal/src" + "fmt" "os" "testing" ) @@ -359,3 +360,38 @@ func TestABINumParamRegs(t *testing.T) { nrtest(t, a, 12) } + +func TestABIUtilsComputePadding(t *testing.T) { + // type s1 { f1 int8; f2 int16; f3 struct{}; f4 int32; f5 int64 } + i8 := types.Types[types.TINT8] + i16 := types.Types[types.TINT16] + i32 := types.Types[types.TINT32] + i64 := types.Types[types.TINT64] + emptys := mkstruct([]*types.Type{}) + s1 := mkstruct([]*types.Type{i8, i16, emptys, i32, i64}) + // func (p1 int32, p2 s1, p3 emptys, p4 [1]int32) + a1 := types.NewArray(i32, 1) + ft := mkFuncType(nil, []*types.Type{i32, s1, emptys, a1}, []*types.Type{}) + + // Run abitest() just to document what we're expected to see. + exp := makeExpectedDump(` + IN 0: R{ I0 } spilloffset: 0 typ: int32 + IN 1: R{ I1 I2 I3 I4 } spilloffset: 8 typ: struct { int8; int16; struct {}; int32; int64 } + IN 2: R{ } offset: 0 typ: struct {} + IN 3: R{ I5 } spilloffset: 24 typ: [1]int32 + offsetToSpillArea: 0 spillAreaSize: 32 +`) + abitest(t, ft, exp) + + // Analyze with full set of registers, then call ComputePadding + // on the second param, verifying the results. + regRes := configAMD64.ABIAnalyze(ft, false) + padding := make([]uint64, 32) + parm := regRes.InParams()[1] + padding = parm.ComputePadding(padding) + want := "[1 1 1 0]" + got := fmt.Sprintf("%+v", padding) + if got != want { + t.Errorf("padding mismatch: wanted %q got %q\n", got, want) + } +} |