go/ssa: make a setNumable interface

Workaround crash on go/ssa in go < 1.13. See golang/go#29612. Change-Id: I32687f6ee0baaf223248d5c1631663c73cbbfc65 GitHub-Last-Rev: 6bf28bf GitHub-Pull-Request: #162 Reviewed-on: https://go-review.googlesource.com/c/tools/+/195477 Run-TryBot: Keith Randall <[email protected]> TryBot-Result: Gobot Gobot <[email protected]> Reviewed-by: Michael Matloob <[email protected]>
golang · Oct 1, 2019 · 4414aad · 4414aad
1 parent 57610ed
commit 4414aad
Showing 1 changed file with 5 additions and 3 deletions.
diff --git a/go/ssa/func.go b/go/ssa/func.go
@@ -257,6 +257,10 @@ func (f *Function) createSyntacticParams(recv *ast.FieldList, functype *ast.Func
 	}
 }
 
+type setNumable interface {
+	setNum(int)
+}
+
 // numberRegisters assigns numbers to all SSA registers
 // (value-defining Instructions) in f, to aid debugging.
 // (Non-Instruction Values are named at construction.)
@@ -267,9 +271,7 @@ func numberRegisters(f *Function) {
 		for _, instr := range b.Instrs {
 			switch instr.(type) {
 			case Value:
-				instr.(interface {
-					setNum(int)
-				}).setNum(v)
+				instr.(setNumable).setNum(v)
 				v++
 			}
 		}