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[dev.ssa] cmd/compile: report better line numbers for Unimplemented/Fatal

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If a failure occurs in SSA processing, we always report the
last line of the function we're compiling.  Modify the callbacks
from SSA to the GC compiler so we can pass a line number back
and use it in Fatalf.

Change-Id: Ifbfad50d5e167e997e0a96f0775bcc369f5c397e
Reviewed-on: https://go-review.googlesource.com/18599
Run-TryBot: Keith Randall <khr@golang.org>
Reviewed-by: David Chase <drchase@google.com>
This commit is contained in:
Keith Randall 2016-01-13 11:14:57 -08:00
parent 594c3aa063
commit da8af47710
6 changed files with 39 additions and 24 deletions
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16
src/cmd/compile/internal/gc/ssa.go
View File

@ -130,7 +130,7 @@ func buildssa(fn *Node) *ssa.Func {
if name == os.Getenv("GOSSAFUNC") {
// TODO: tempfile? it is handy to have the location
// of this file be stable, so you can just reload in the browser.
s.config.HTML = ssa.NewHTMLWriter("ssa.html", &s, name)
s.config.HTML = ssa.NewHTMLWriter("ssa.html", s.config, name)
// TODO: generate and print a mapping from nodes to values and blocks
}
defer func() {
@ -320,9 +320,11 @@ func (s *state) label(sym *Sym) *ssaLabel {
return lab
}
func (s *state) Logf(msg string, args ...interface{}) { s.config.Logf(msg, args...) }
func (s *state) Fatalf(msg string, args ...interface{}) { s.config.Fatalf(msg, args...) }
func (s *state) Unimplementedf(msg string, args ...interface{}) { s.config.Unimplementedf(msg, args...) }
func (s *state) Logf(msg string, args ...interface{}) { s.config.Logf(msg, args...) }
func (s *state) Fatalf(msg string, args ...interface{}) { s.config.Fatalf(s.peekLine(), msg, args...) }
func (s *state) Unimplementedf(msg string, args ...interface{}) {
s.config.Unimplementedf(s.peekLine(), msg, args...)
}
func (s *state) Warnl(line int, msg string, args ...interface{}) { s.config.Warnl(line, msg, args...) }
func (s *state) Debug_checknil() bool { return s.config.Debug_checknil() }
@ -4594,17 +4596,19 @@ func (e *ssaExport) Logf(msg string, args ...interface{}) {
}
// Fatal reports a compiler error and exits.
func (e *ssaExport) Fatalf(msg string, args ...interface{}) {
func (e *ssaExport) Fatalf(line int32, msg string, args ...interface{}) {
// If e was marked as unimplemented, anything could happen. Ignore.
if !e.unimplemented {
lineno = line
Fatalf(msg, args...)
}
}
// Unimplemented reports that the function cannot be compiled.
// It will be removed once SSA work is complete.
func (e *ssaExport) Unimplementedf(msg string, args ...interface{}) {
func (e *ssaExport) Unimplementedf(line int32, msg string, args ...interface{}) {
if e.mustImplement {
lineno = line
Fatalf(msg, args...)
}
const alwaysLog = false // enable to calculate top unimplemented features

14
src/cmd/compile/internal/ssa/config.go
View File

@ -44,11 +44,11 @@ type Logger interface {
Logf(string, ...interface{})
// Fatal reports a compiler error and exits.
Fatalf(string, ...interface{})
Fatalf(line int32, msg string, args ...interface{})
// Unimplemented reports that the function cannot be compiled.
// It will be removed once SSA work is complete.
Unimplementedf(msg string, args ...interface{})
Unimplementedf(line int32, msg string, args ...interface{})
// Warnl writes compiler messages in the form expected by "errorcheck" tests
Warnl(line int, fmt_ string, args ...interface{})
@ -91,7 +91,7 @@ func NewConfig(arch string, fe Frontend, ctxt *obj.Link) *Config {
c.lowerBlock = rewriteBlockAMD64
c.lowerValue = rewriteValueAMD64 // TODO(khr): full 32-bit support
default:
fe.Unimplementedf("arch %s not implemented", arch)
fe.Unimplementedf(0, "arch %s not implemented", arch)
}
c.ctxt = ctxt
@ -106,9 +106,11 @@ func (c *Config) NewFunc() *Func {
return &Func{Config: c, NamedValues: map[LocalSlot][]*Value{}}
}
func (c *Config) Logf(msg string, args ...interface{}) { c.fe.Logf(msg, args...) }
func (c *Config) Fatalf(msg string, args ...interface{}) { c.fe.Fatalf(msg, args...) }
func (c *Config) Unimplementedf(msg string, args ...interface{}) { c.fe.Unimplementedf(msg, args...) }
func (c *Config) Logf(msg string, args ...interface{}) { c.fe.Logf(msg, args...) }
func (c *Config) Fatalf(line int32, msg string, args ...interface{}) { c.fe.Fatalf(line, msg, args...) }
func (c *Config) Unimplementedf(line int32, msg string, args ...interface{}) {
c.fe.Unimplementedf(line, msg, args...)
}
func (c *Config) Warnl(line int, msg string, args ...interface{}) { c.fe.Warnl(line, msg, args...) }
func (c *Config) Debug_checknil() bool { return c.fe.Debug_checknil() }

9
src/cmd/compile/internal/ssa/export_test.go
View File

@ -32,9 +32,12 @@ func (DummyFrontend) Auto(t Type) GCNode {
return nil
}
func (d DummyFrontend) Logf(msg string, args ...interface{}) { d.t.Logf(msg, args...) }
func (d DummyFrontend) Fatalf(msg string, args ...interface{}) { d.t.Fatalf(msg, args...) }
func (d DummyFrontend) Unimplementedf(msg string, args ...interface{}) { d.t.Fatalf(msg, args...) }
func (d DummyFrontend) Logf(msg string, args ...interface{}) { d.t.Logf(msg, args...) }
func (d DummyFrontend) Fatalf(line int32, msg string, args ...interface{}) { d.t.Fatalf(msg, args...) }
func (d DummyFrontend) Unimplementedf(line int32, msg string, args ...interface{}) {
d.t.Fatalf(msg, args...)
}
func (d DummyFrontend) Warnl(line int, msg string, args ...interface{}) { d.t.Logf(msg, args...) }
func (d DummyFrontend) Debug_checknil() bool { return false }

8
src/cmd/compile/internal/ssa/func.go
View File

@ -305,6 +305,8 @@ func (f *Func) ConstFloat64(line int32, t Type, c float64) *Value {
return f.Entry.NewValue0I(line, OpConst64F, t, int64(math.Float64bits(c)))
}
func (f *Func) Logf(msg string, args ...interface{}) { f.Config.Logf(msg, args...) }
func (f *Func) Fatalf(msg string, args ...interface{}) { f.Config.Fatalf(msg, args...) }
func (f *Func) Unimplementedf(msg string, args ...interface{}) { f.Config.Unimplementedf(msg, args...) }
func (f *Func) Logf(msg string, args ...interface{}) { f.Config.Logf(msg, args...) }
func (f *Func) Fatalf(msg string, args ...interface{}) { f.Config.Fatalf(f.Entry.Line, msg, args...) }
func (f *Func) Unimplementedf(msg string, args ...interface{}) {
f.Config.Unimplementedf(f.Entry.Line, msg, args...)
}

6
src/cmd/compile/internal/ssa/html.go
View File

@ -20,7 +20,7 @@ type HTMLWriter struct {
func NewHTMLWriter(path string, logger Logger, funcname string) *HTMLWriter {
out, err := os.OpenFile(path, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
if err != nil {
logger.Fatalf("%v", err)
logger.Fatalf(0, "%v", err)
}
html := HTMLWriter{File: out, Logger: logger}
html.start(funcname)
@ -326,13 +326,13 @@ func (w *HTMLWriter) WriteColumn(title string, html string) {
func (w *HTMLWriter) Printf(msg string, v ...interface{}) {
if _, err := fmt.Fprintf(w.File, msg, v...); err != nil {
w.Fatalf("%v", err)
w.Fatalf(0, "%v", err)
}
}
func (w *HTMLWriter) WriteString(s string) {
if _, err := w.File.WriteString(s); err != nil {
w.Fatalf("%v", err)
w.Fatalf(0, "%v", err)
}
}

10
src/cmd/compile/internal/ssa/value.go
View File

@ -135,9 +135,13 @@ func (v *Value) copyInto(b *Block) *Value {
return c
}
func (v *Value) Logf(msg string, args ...interface{}) { v.Block.Logf(msg, args...) }
func (v *Value) Fatalf(msg string, args ...interface{}) { v.Block.Fatalf(msg, args...) }
func (v *Value) Unimplementedf(msg string, args ...interface{}) { v.Block.Unimplementedf(msg, args...) }
func (v *Value) Logf(msg string, args ...interface{}) { v.Block.Logf(msg, args...) }
func (v *Value) Fatalf(msg string, args ...interface{}) {
v.Block.Func.Config.Fatalf(v.Line, msg, args...)
}
func (v *Value) Unimplementedf(msg string, args ...interface{}) {
v.Block.Func.Config.Unimplementedf(v.Line, msg, args...)
}
// ExternSymbol is an aux value that encodes a variable's
// constant offset from the static base pointer.