some deletions

[dotfiles/.git] / .config / coc / extensions / coc-go-data / tools / pkg / mod / golang.org / x / tools@v0.0.0-20201105173854-bc9fc8d8c4bc / go / analysis / passes / framepointer / framepointer.go

diff --git a/.config/coc/extensions/coc-go-data/tools/pkg/mod/golang.org/x/tools@v0.0.0-20201105173854-bc9fc8d8c4bc/go/analysis/passes/framepointer/framepointer.go b/.config/coc/extensions/coc-go-data/tools/pkg/mod/golang.org/x/tools@v0.0.0-20201105173854-bc9fc8d8c4bc/go/analysis/passes/framepointer/framepointer.go
deleted file mode 100644 (file)
index 6c13eeb..0000000
--- a/.config/coc/extensions/coc-go-data/tools/pkg/mod/golang.org/x/tools@v0.0.0-20201105173854-bc9fc8d8c4bc/go/analysis/passes/framepointer/framepointer.go
+++ /dev/null
@@ -1,91 +0,0 @@
-// Copyright 2020 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.
-
-// Package framepointer defines an Analyzer that reports assembly code
-// that clobbers the frame pointer before saving it.
-package framepointer
-
-import (
-       "go/build"
-       "regexp"
-       "strings"
-
-       "golang.org/x/tools/go/analysis"
-       "golang.org/x/tools/go/analysis/passes/internal/analysisutil"
-)
-
-const Doc = "report assembly that clobbers the frame pointer before saving it"
-
-var Analyzer = &analysis.Analyzer{
-       Name: "framepointer",
-       Doc:  Doc,
-       Run:  run,
-}
-
-var (
-       re             = regexp.MustCompile
-       asmWriteBP     = re(`,\s*BP$`) // TODO: can have false positive, e.g. for TESTQ BP,BP. Seems unlikely.
-       asmMentionBP   = re(`\bBP\b`)
-       asmControlFlow = re(`^(J|RET)`)
-)
-
-func run(pass *analysis.Pass) (interface{}, error) {
-       if build.Default.GOARCH != "amd64" { // TODO: arm64 also?
-               return nil, nil
-       }
-       if build.Default.GOOS != "linux" && build.Default.GOOS != "darwin" {
-               return nil, nil
-       }
-
-       // Find assembly files to work on.
-       var sfiles []string
-       for _, fname := range pass.OtherFiles {
-               if strings.HasSuffix(fname, ".s") {
-                       sfiles = append(sfiles, fname)
-               }
-       }
-
-       for _, fname := range sfiles {
-               content, tf, err := analysisutil.ReadFile(pass.Fset, fname)
-               if err != nil {
-                       return nil, err
-               }
-
-               lines := strings.SplitAfter(string(content), "\n")
-               active := false
-               for lineno, line := range lines {
-                       lineno++
-
-                       // Ignore comments and commented-out code.
-                       if i := strings.Index(line, "//"); i >= 0 {
-                               line = line[:i]
-                       }
-                       line = strings.TrimSpace(line)
-
-                       // We start checking code at a TEXT line for a frameless function.
-                       if strings.HasPrefix(line, "TEXT") && strings.Contains(line, "(SB)") && strings.Contains(line, "$0") {
-                               active = true
-                               continue
-                       }
-                       if !active {
-                               continue
-                       }
-
-                       if asmWriteBP.MatchString(line) { // clobber of BP, function is not OK
-                               pass.Reportf(analysisutil.LineStart(tf, lineno), "frame pointer is clobbered before saving")
-                               active = false
-                               continue
-                       }
-                       if asmMentionBP.MatchString(line) { // any other use of BP might be a read, so function is OK
-                               active = false
-                               continue
-                       }
-                       if asmControlFlow.MatchString(line) { // give up after any branch instruction
-                               active = false
-                               continue
-                       }
-               }
-       }
-       return nil, nil
-}