cmd/compile/internal/ssa: remove redundant "type:" prefix check

Remove redundant "type:" prefix check on symbol names in isFixedLoad,
also refactor some duplicate code into methods.

Change-Id: I8358422596eea8c39d1a30a554bd0aae8b570038
Reviewed-on: https://go-review.googlesource.com/c/go/+/701275
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
Auto-Submit: Keith Randall <khr@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Carlos Amedee <carlos@golang.org>

1 files changed, 19 insertions, 1 deletions

diff --git a/src/cmd/internal/obj/link.go b/src/cmd/internal/obj/link.go
index 6513e11687..816fed026f 100644
--- a/src/cmd/internal/obj/link.go
+++ b/src/cmd/internal/obj/link.go
@@ -464,7 +464,7 @@ type LSym struct {
 	P      []byte
 	R      []Reloc
 
-	Extra *interface{} // *FuncInfo, *VarInfo, *FileInfo, or *TypeInfo, if present
+	Extra *interface{} // *FuncInfo, *VarInfo, *FileInfo, *TypeInfo, or *ItabInfo, if present
 
 	Pkg    string
 	PkgIdx int32
@@ -604,6 +604,15 @@ func (s *LSym) NewTypeInfo() *TypeInfo {
 	return t
 }
 
+// TypeInfo returns the *TypeInfo associated with s, or else nil.
+func (s *LSym) TypeInfo() *TypeInfo {
+	if s.Extra == nil {
+		return nil
+	}
+	t, _ := (*s.Extra).(*TypeInfo)
+	return t
+}
+
 // An ItabInfo contains information for a symbol
 // that contains a runtime.itab.
 type ItabInfo struct {
@@ -620,6 +629,15 @@ func (s *LSym) NewItabInfo() *ItabInfo {
 	return t
 }
 
+// ItabInfo returns the *ItabInfo associated with s, or else nil.
+func (s *LSym) ItabInfo() *ItabInfo {
+	if s.Extra == nil {
+		return nil
+	}
+	i, _ := (*s.Extra).(*ItabInfo)
+	return i
+}
+
 // WasmImport represents a WebAssembly (WASM) imported function with
 // parameters and results translated into WASM types based on the Go function
 // declaration.