diff options
| -rw-r--r-- | src/cmd/compile/internal/ssagen/ssa.go | 4 | ||||
| -rw-r--r-- | test/fixedbugs/issue77815.go | 20 |
2 files changed, 22 insertions, 2 deletions
diff --git a/src/cmd/compile/internal/ssagen/ssa.go b/src/cmd/compile/internal/ssagen/ssa.go index 37a0cbd881..849781c9ee 100644 --- a/src/cmd/compile/internal/ssagen/ssa.go +++ b/src/cmd/compile/internal/ssagen/ssa.go @@ -5670,7 +5670,7 @@ func (s *state) storeTypeScalars(t *types.Type, left, right *ssa.Value, skip ski val := s.newValue1I(ssa.OpStructSelect, ft, int64(i), right) s.storeTypeScalars(ft, addr, val, 0) } - case t.IsArray() && t.NumElem() == 0: + case t.IsArray() && t.Size() == 0: // nothing case t.IsArray() && t.NumElem() == 1: s.storeTypeScalars(t.Elem(), left, s.newValue1I(ssa.OpArraySelect, t.Elem(), 0, right), 0) @@ -5710,7 +5710,7 @@ func (s *state) storeTypePtrs(t *types.Type, left, right *ssa.Value) { val := s.newValue1I(ssa.OpStructSelect, ft, int64(i), right) s.storeTypePtrs(ft, addr, val) } - case t.IsArray() && t.NumElem() == 0: + case t.IsArray() && t.Size() == 0: // nothing case t.IsArray() && t.NumElem() == 1: s.storeTypePtrs(t.Elem(), left, s.newValue1I(ssa.OpArraySelect, t.Elem(), 0, right)) diff --git a/test/fixedbugs/issue77815.go b/test/fixedbugs/issue77815.go new file mode 100644 index 0000000000..9adc108498 --- /dev/null +++ b/test/fixedbugs/issue77815.go @@ -0,0 +1,20 @@ +// compile + +// Copyright 2026 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 p + +type S struct { + a [4]struct{} + f chan int +} + +func f(p *S) { + var s S + + // Memory write that requires a write barrier should work + // with structs having zero-sized arrays of non-zero elements. + *p = s +} |