[dev.regabi] all: merge master into dev.regabi

The list of conflicted files for this merge is:

   src/cmd/compile/internal/gc/inl.go
   src/cmd/compile/internal/gc/order.go
   src/cmd/compile/internal/gc/ssa.go
   test/fixedbugs/issue20415.go
   test/fixedbugs/issue22822.go
   test/fixedbugs/issue28079b.go

inl.go was updated for changes on dev.regabi: namely that OSELRECV has
been removed, and that OSELRECV2 now only uses List, rather than both
Left and List.

order.go was updated IsAutoTmp is now a standalone function, rather
than a method on Node.

ssa.go was similarly updated for new APIs involving package ir.

The tests are all merging upstream additions for gccgo error messages
with changes to cmd/compile's error messages on the dev.regabi branch.

Change-Id: Icaaf186d69da791b5994dbb6688ec989caabec42

1 files changed, 1 insertions, 7 deletions

diff --git a/src/cmd/compile/internal/ssa/expand_calls.go b/src/cmd/compile/internal/ssa/expand_calls.go
index 0eba238d81..e1c657d4a4 100644
--- a/src/cmd/compile/internal/ssa/expand_calls.go
+++ b/src/cmd/compile/internal/ssa/expand_calls.go
@@ -196,9 +196,6 @@ func expandCalls(f *Func) {
 			}
 			if leaf.Op == OpIData {
 				leafType = removeTrivialWrapperTypes(leaf.Type)
-				if leafType.IsEmptyInterface() {
-					leafType = typ.BytePtr
-				}
 			}
 			aux := selector.Aux
 			auxInt := selector.AuxInt + offset
@@ -247,12 +244,9 @@ func expandCalls(f *Func) {
 			// i.e., the struct select is generated and remains in because it is not applied to an actual structure.
 			// The OpLoad was created to load the single field of the IData
 			// This case removes that StructSelect.
-			if leafType != selector.Type && !selector.Type.IsEmptyInterface() { // empty interface for #42727
+			if leafType != selector.Type {
 				f.Fatalf("Unexpected Load as selector, leaf=%s, selector=%s\n", leaf.LongString(), selector.LongString())
 			}
-			if selector.Type.IsEmptyInterface() {
-				selector.Type = typ.BytePtr
-			}
 			leaf.copyOf(selector)
 			for _, s := range namedSelects[selector] {
 				locs = append(locs, f.Names[s.locIndex])