cmd/compile: make ssa compilation unconditional

Rip out the code that allows SSA to be used conditionally.

No longer exists:
 ssa=0 flag
 GOSSAHASH
 GOSSAPKG
 SSATEST

GOSSAFUNC now only controls the printing of the IR/html.

Still need to rip out all of the old backend.  It should no longer be
callable after this CL.

Update #16357

Change-Id: Ib30cc18fba6ca52232c41689ba610b0a94aa74f5
Reviewed-on: https://go-review.googlesource.com/29155
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>

1 files changed, 2 insertions, 5 deletions

diff --git a/src/cmd/compile/internal/ssa/export_test.go b/src/cmd/compile/internal/ssa/export_test.go
index c26e55517c..e6ccca60cb 100644
--- a/src/cmd/compile/internal/ssa/export_test.go
+++ b/src/cmd/compile/internal/ssa/export_test.go
@@ -66,11 +66,8 @@ func (d DummyFrontend) Logf(msg string, args ...interface{}) { d.t.Logf(msg, arg
 func (d DummyFrontend) Log() bool                            { return true }
 
 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 int32, msg string, args ...interface{}) { d.t.Logf(msg, args...) }
-func (d DummyFrontend) Debug_checknil() bool                              { return false }
+func (d DummyFrontend) Warnl(line int32, msg string, args ...interface{})  { d.t.Logf(msg, args...) }
+func (d DummyFrontend) Debug_checknil() bool                               { return false }
 
 func (d DummyFrontend) TypeBool() Type    { return TypeBool }
 func (d DummyFrontend) TypeInt8() Type    { return TypeInt8 }