cmd/compile: simplify assert{E,I}2I{,2} calling conventions

This CL rebases CL 273694 on top of master with @mdempsky's permission.

For assertE2I and assertI2I, there's no need to pass through the
interface's data pointer: it's always going to come back unmodified.

For assertE2I2 and assertI2I2, there's no need for an extra bool
result parameter: it's redundant with testing the returned interface
value for nil.

Change-Id: Ic92d4409ad381952f875d3d74b8cf11c32702fa6
Reviewed-on: https://go-review.googlesource.com/c/go/+/292892
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>

1 files changed, 4 insertions, 4 deletions

diff --git a/src/cmd/compile/internal/typecheck/builtin/runtime.go b/src/cmd/compile/internal/typecheck/builtin/runtime.go
index ad82a9b349..d5e00afcf8 100644
--- a/src/cmd/compile/internal/typecheck/builtin/runtime.go
+++ b/src/cmd/compile/internal/typecheck/builtin/runtime.go
@@ -101,10 +101,10 @@ func convT2I(tab *byte, elem *any) (ret any)
 func convT2Inoptr(tab *byte, elem *any) (ret any)
 
 // interface type assertions x.(T)
-func assertE2I(typ *byte, iface any) (ret any)
-func assertE2I2(typ *byte, iface any) (ret any, b bool)
-func assertI2I(typ *byte, iface any) (ret any)
-func assertI2I2(typ *byte, iface any) (ret any, b bool)
+func assertE2I(inter *byte, typ *byte) *byte
+func assertE2I2(inter *byte, eface any) (ret any)
+func assertI2I(inter *byte, tab *byte) *byte
+func assertI2I2(inter *byte, iface any) (ret any)
 func panicdottypeE(have, want, iface *byte)
 func panicdottypeI(have, want, iface *byte)
 func panicnildottype(want *byte)