[dev.typeparams] Handling multiple type arguments for call via new node OLIST

Will now run "go tool compile -G=2 -W=2" on a simple generic function
with multiple type parameters and a call to that function with multiple
explicit type arguments.

We will likely move to have a separate function/type instantiation node,
in order distinguish these cases from normal index expressions.

Change-Id: I0a571902d63785cc06240ed4ba0495923403b511
Reviewed-on: https://go-review.googlesource.com/c/go/+/288433
Trust: Dan Scales <danscales@google.com>
Run-TryBot: Dan Scales <danscales@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>

1 files changed, 14 insertions, 0 deletions

diff --git a/src/cmd/compile/internal/ir/expr.go b/src/cmd/compile/internal/ir/expr.go
index 92f93e98b8..7c60334c04 100644
--- a/src/cmd/compile/internal/ir/expr.go
+++ b/src/cmd/compile/internal/ir/expr.go
@@ -307,6 +307,20 @@ func (n *IndexExpr) SetOp(op Op) {
 	}
 }
 
+// A ListExpr is list of expressions
+type ListExpr struct {
+	miniExpr
+	List Nodes
+}
+
+func NewListExpr(pos src.XPos, list []Node) *ListExpr {
+	n := &ListExpr{}
+	n.pos = pos
+	n.op = OLIST
+	n.List = list
+	return n
+}
+
 // A KeyExpr is a Key: Value composite literal key.
 type KeyExpr struct {
 	miniExpr