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cmd/compile: disable tail call for method wrappers when RegabiArgs is enabled

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Currently, the IR of tailcall does not connect the arguments with
the OTAILCALL node, so the arguments are not marshaled correctly.
Disable tail call for now.

Updates #40724.

Change-Id: I39de3ea8e19a23eb63768ab7282d2f870e9c266e
Reviewed-on: https://go-review.googlesource.com/c/go/+/307234
Trust: Cherry Zhang <cherryyz@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
Reviewed-by: Austin Clements <austin@google.com>
This commit is contained in:
Cherry Zhang 2021-04-04 12:20:35 -04:00
parent 411860251e
commit 45e87cd3ec
1 changed files with 5 additions and 1 deletions
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6
src/cmd/compile/internal/reflectdata/reflect.go
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@ -1770,7 +1770,11 @@ func methodWrapper(rcvr *types.Type, method *types.Field) *obj.LSym {
// the TOC to the appropriate value for that module. But if it returns
// directly to the wrapper's caller, nothing will reset it to the correct
// value for that function.
if !base.Flag.Cfg.Instrumenting && rcvr.IsPtr() && methodrcvr.IsPtr() && method.Embedded != 0 && !types.IsInterfaceMethod(method.Type) && !(base.Ctxt.Arch.Name == "ppc64le" && base.Ctxt.Flag_dynlink) {
//
// Disable tailcall for RegabiArgs for now. The IR does not connect the
// arguments with the OTAILCALL node, and the arguments are not marshaled
// correctly.
if !base.Flag.Cfg.Instrumenting && rcvr.IsPtr() && methodrcvr.IsPtr() && method.Embedded != 0 && !types.IsInterfaceMethod(method.Type) && !(base.Ctxt.Arch.Name == "ppc64le" && base.Ctxt.Flag_dynlink) && !objabi.Experiment.RegabiArgs {
// generate tail call: adjust pointer receiver and jump to embedded method.
left := dot.X // skip final .M
if !left.Type().IsPtr() {