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-rw-r--r--src/cmd/compile/internal/compare/compare.go7
1 files changed, 6 insertions, 1 deletions
diff --git a/src/cmd/compile/internal/compare/compare.go b/src/cmd/compile/internal/compare/compare.go
index 1674065..e848e1c 100644
--- a/src/cmd/compile/internal/compare/compare.go
+++ b/src/cmd/compile/internal/compare/compare.go
@@ -148,7 +148,7 @@ func calculateCostForType(t *types.Type) int64 {
return EqStructCost(t)
case types.TSLICE:
// Slices are not comparable.
- base.Fatalf("eqStructFieldCost: unexpected slice type")
+ base.Fatalf("calculateCostForType: unexpected slice type")
case types.TARRAY:
elemCost := calculateCostForType(t.Elem())
cost = t.NumElem() * elemCost
@@ -374,6 +374,11 @@ func eqmem(p ir.Node, q ir.Node, field *types.Sym, size int64) ir.Node {
}
func eqmemfunc(size int64, t *types.Type) (fn *ir.Name, needsize bool) {
+ if !base.Ctxt.Arch.CanMergeLoads && t.Alignment() < int64(base.Ctxt.Arch.Alignment) && t.Alignment() < t.Size() {
+ // We can't use larger comparisons if the value might not be aligned
+ // enough for the larger comparison. See issues 46283 and 67160.
+ size = 0
+ }
switch size {
default:
fn = typecheck.LookupRuntime("memequal")