cmd/compile: get rid of zero-sized values in call expansion

[gostls13.git] / src / cmd / compile / internal / ssa / rewritedec.go

diff --git a/src/cmd/compile/internal/ssa/rewritedec.go b/src/cmd/compile/internal/ssa/rewritedec.go
index fbfe15c0c58965f9160b1130107199e7f019a007..7468518246dde8d76f353b910a36d49ae8dba2ad 100644 (file)
--- a/src/cmd/compile/internal/ssa/rewritedec.go
+++ b/src/cmd/compile/internal/ssa/rewritedec.go
@@ -583,6 +583,18 @@ func rewriteValuedec_OpStore(v *Value) bool {
        b := v.Block
        config := b.Func.Config
        typ := &b.Func.Config.Types
+       // match: (Store {t} _ _ mem)
+       // cond: t.Size() == 0
+       // result: mem
+       for {
+               t := auxToType(v.Aux)
+               mem := v_2
+               if !(t.Size() == 0) {
+                       break
+               }
+               v.copyOf(mem)
+               return true
+       }
        // match: (Store {t} dst (ComplexMake real imag) mem)
        // cond: t.Size() == 8
        // result: (Store {typ.Float32} (OffPtr <typ.Float32Ptr> [4] dst) imag (Store {typ.Float32} dst real mem))