ssa: debug info of global variable

cl/_testdata/debug/in.go

@@ -140,6 +140,9 @@ func main() {
 		pad1: 100,
 		pad2: 200,
 	}
+	globalStructPtr = &s
+	globalStruct = s
+	println("globalInt:", globalInt)
 	println("s:", &s)
 	FuncWithAllTypeStructParam(s)
 	println("called function with struct")
@@ -159,5 +162,11 @@ func main() {
 	)
 	println(i, err)
 	println("called function with types")
+	println(globalStructPtr)
+	println(&globalStruct)
 	println("done")
 }
+
+var globalInt int = 301
+var globalStruct StructWithAllTypeFields
+var globalStructPtr *StructWithAllTypeFields

cl/compile.go

@@ -797,7 +797,12 @@ func (p *context) compileValue(b llssa.Builder, v ssa.Value) llssa.Expr {
 		}
 		return pyFn.Expr
 	case *ssa.Global:
-		return p.varOf(b, v)
+		val := p.varOf(b, v)
+		if debugSymbols {
+			pos := p.fset.Position(v.Pos())
+			b.DIGlobal(val, v.Name(), pos)
+		}
+		return val
 	case *ssa.Const:
 		t := types.Default(v.Type())
 		bg := llssa.InGo

ssa/di.go

@@ -90,7 +90,7 @@ func (b diBuilder) createFile(filename string) DIFile {
 	return &aDIFile{ll: b.di.CreateFile(file, dir)}
 }
 
-func (f DIFile) scopeMeta(b diBuilder, cu CompilationUnit, pos token.Position) DIScopeMeta {
+func (f DIFile) scopeMeta(b diBuilder, pos token.Position) DIScopeMeta {
 	return &aDIScopeMeta{b.file(pos.Filename).ll}
 }
 
@@ -633,6 +633,18 @@ func (b Builder) DIVarAuto(f Function, pos token.Position, varName string, vt Ty
 	return b.Pkg.diBuilder().varAuto(f, pos, varName, t)
 }
 
+func (b Builder) DIGlobal(v Expr, name string, pos token.Position) {
+	gv := b.Pkg.diBuilder().createGlobalVariableExpression(
+		b.Pkg.diBuilder().file(pos.Filename),
+		pos,
+		name,
+		name,
+		b.Pkg.diBuilder().diType(v.Type, pos),
+		false,
+	)
+	v.impl.AddMetadata(0, gv.ll)
+}
+
 func (b Builder) DISetCurrentDebugLocation(f Function, pos token.Position) {
 	b.impl.SetCurrentDebugLocation(
 		uint(pos.Line),