ssa: fix function and global var debug info scope

cl/compile.go

@@ -730,15 +730,20 @@ func (p *context) compileInstr(b llssa.Builder, instr ssa.Instruction) {
 				// Not a local variable.
 				return
 			}
-			if v.IsAddr {
-				// skip *ssa.Alloc or *ssa.FieldAddr
+			if variable.IsField() {
+				// skip *ssa.FieldAddr
 				return
 			}
 			pos := p.goProg.Fset.Position(v.Pos())
 			value := p.compileValue(b, v.X)
 			fn := v.Parent()
 			dbgVar := p.getLocalVariable(b, fn, variable)
-			b.DIValue(value, dbgVar, p.fn, pos, b.Func.Block(v.Block().Index))
+			if v.IsAddr {
+				// *ssa.Alloc
+				b.DIDeclare(value, dbgVar, p.fn, pos, b.Func.Block(v.Block().Index))
+			} else {
+				b.DIValue(value, dbgVar, p.fn, pos, b.Func.Block(v.Block().Index))
+			}
 		}
 	default:
 		panic(fmt.Sprintf("compileInstr: unknown instr - %T\n", instr))