Revert "cmd/compile, cmd/link, runtime: make defers low-cost through inline code and extra funcdata"

This reverts CL 190098.

Reason for revert: broke several builders.

Change-Id: I69161352f9ded02537d8815f259c4d391edd9220
Reviewed-on: https://go-review.googlesource.com/c/go/+/201519
Run-TryBot: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Austin Clements <austin@google.com>
Reviewed-by: Dan Scales <danscales@google.com>

1 files changed, 0 insertions, 86 deletions

diff --git a/test/defererrcheck.go b/test/defererrcheck.go
deleted file mode 100644
index 5b90e58738..0000000000
--- a/test/defererrcheck.go
+++ /dev/null
@@ -1,86 +0,0 @@
-// errorcheck -0 -l -d=defer
-
-// Copyright 2019 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// check that open-coded defers are used in expected situations
-
-package main
-
-import "fmt"
-
-var glob = 3
-
-func f1() {
-
-	for i := 0; i < 10; i++ {
-		fmt.Println("loop")
-	}
-	defer func() { // ERROR "open-coded defer in function f1"
-		fmt.Println("defer")
-	}()
-}
-
-func f2() {
-	for {
-		defer func() { // ERROR "heap-allocated defer in function f2"
-			fmt.Println("defer1")
-		}()
-		if glob > 2 {
-			break
-		}
-	}
-	defer func() { // ERROR "stack-allocated defer in function f2"
-		fmt.Println("defer2")
-	}()
-}
-
-func f3() {
-	defer func() { // ERROR "stack-allocated defer in function f3"
-		fmt.Println("defer2")
-	}()
-	for {
-		defer func() { // ERROR "heap-allocated defer in function f3"
-			fmt.Println("defer1")
-		}()
-		if glob > 2 {
-			break
-		}
-	}
-}
-
-func f4() {
-	defer func() { // ERROR "open-coded defer in function f4"
-		fmt.Println("defer")
-	}()
-label:
-	fmt.Println("goto loop")
-	if glob > 2 {
-		goto label
-	}
-}
-
-func f5() {
-label:
-	fmt.Println("goto loop")
-	defer func() { // ERROR "heap-allocated defer in function f5"
-		fmt.Println("defer")
-	}()
-	if glob > 2 {
-		goto label
-	}
-}
-
-func f6() {
-label:
-	fmt.Println("goto loop")
-	if glob > 2 {
-		goto label
-	}
-	// The current analysis doesn't end a backward goto loop, so this defer is
-	// considered to be inside a loop
-	defer func() { // ERROR "heap-allocated defer in function f6"
-		fmt.Println("defer")
-	}()
-}