Adding upstream version 1.16.10.upstream/1.16.10upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 86 insertions, 0 deletions

diff --git a/src/cmd/compile/internal/gc/gen.go b/src/cmd/compile/internal/gc/gen.go
new file mode 100644
index 0000000..929653e
--- /dev/null
+++ b/src/cmd/compile/internal/gc/gen.go
@@ -0,0 +1,86 @@
+// Copyright 2009 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 gc
+
+import (
+	"cmd/compile/internal/types"
+	"cmd/internal/obj"
+	"cmd/internal/src"
+	"strconv"
+)
+
+// sysfunc looks up Go function name in package runtime. This function
+// must follow the internal calling convention.
+func sysfunc(name string) *obj.LSym {
+	s := Runtimepkg.Lookup(name)
+	s.SetFunc(true)
+	return s.Linksym()
+}
+
+// sysvar looks up a variable (or assembly function) name in package
+// runtime. If this is a function, it may have a special calling
+// convention.
+func sysvar(name string) *obj.LSym {
+	return Runtimepkg.Lookup(name).Linksym()
+}
+
+// isParamStackCopy reports whether this is the on-stack copy of a
+// function parameter that moved to the heap.
+func (n *Node) isParamStackCopy() bool {
+	return n.Op == ONAME && (n.Class() == PPARAM || n.Class() == PPARAMOUT) && n.Name.Param.Heapaddr != nil
+}
+
+// isParamHeapCopy reports whether this is the on-heap copy of
+// a function parameter that moved to the heap.
+func (n *Node) isParamHeapCopy() bool {
+	return n.Op == ONAME && n.Class() == PAUTOHEAP && n.Name.Param.Stackcopy != nil
+}
+
+// autotmpname returns the name for an autotmp variable numbered n.
+func autotmpname(n int) string {
+	// Give each tmp a different name so that they can be registerized.
+	// Add a preceding . to avoid clashing with legal names.
+	const prefix = ".autotmp_"
+	// Start with a buffer big enough to hold a large n.
+	b := []byte(prefix + "      ")[:len(prefix)]
+	b = strconv.AppendInt(b, int64(n), 10)
+	return types.InternString(b)
+}
+
+// make a new Node off the books
+func tempAt(pos src.XPos, curfn *Node, t *types.Type) *Node {
+	if curfn == nil {
+		Fatalf("no curfn for tempAt")
+	}
+	if curfn.Func.Closure != nil && curfn.Op == OCLOSURE {
+		Dump("tempAt", curfn)
+		Fatalf("adding tempAt to wrong closure function")
+	}
+	if t == nil {
+		Fatalf("tempAt called with nil type")
+	}
+
+	s := &types.Sym{
+		Name: autotmpname(len(curfn.Func.Dcl)),
+		Pkg:  localpkg,
+	}
+	n := newnamel(pos, s)
+	s.Def = asTypesNode(n)
+	n.Type = t
+	n.SetClass(PAUTO)
+	n.Esc = EscNever
+	n.Name.Curfn = curfn
+	n.Name.SetUsed(true)
+	n.Name.SetAutoTemp(true)
+	curfn.Func.Dcl = append(curfn.Func.Dcl, n)
+
+	dowidth(t)
+
+	return n.Orig
+}
+
+func temp(t *types.Type) *Node {
+	return tempAt(lineno, Curfn, t)
+}