diff options
Diffstat (limited to 'src/cmd/compile/internal/noder/reader.go')
| -rw-r--r-- | src/cmd/compile/internal/noder/reader.go | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/src/cmd/compile/internal/noder/reader.go b/src/cmd/compile/internal/noder/reader.go index 32276e7553..aa2cccf86b 100644 --- a/src/cmd/compile/internal/noder/reader.go +++ b/src/cmd/compile/internal/noder/reader.go @@ -1487,7 +1487,7 @@ func (r *reader) switchStmt(label *types.Sym) ir.Node { r.openScope() pos := r.pos() - var cases []ir.Node + var cases, rtypes []ir.Node if iface != nil { cases = make([]ir.Node, r.Len()) if len(cases) == 0 { @@ -1498,9 +1498,30 @@ func (r *reader) switchStmt(label *types.Sym) ir.Node { } } else { cases = r.exprList() + + tagType := types.Types[types.TBOOL] + if tag != nil { + tagType = tag.Type() + } + for i, cas := range cases { + if cas.Op() == ir.ONIL { + continue // never needs rtype + } + if tagType.IsInterface() != cas.Type().IsInterface() { + typ := tagType + if typ.IsInterface() { + typ = cas.Type() + } + for len(rtypes) < i { + rtypes = append(rtypes, nil) + } + rtypes = append(rtypes, reflectdata.TypePtr(typ)) + } + } } clause := ir.NewCaseStmt(pos, cases, nil) + clause.RTypes = rtypes if ident != nil { pos := r.pos() |