diff options
Diffstat (limited to 'src/cmd/internal/obj')
| -rw-r--r-- | src/cmd/internal/obj/x86/obj6.go | 16 |
1 files changed, 2 insertions, 14 deletions
diff --git a/src/cmd/internal/obj/x86/obj6.go b/src/cmd/internal/obj/x86/obj6.go index 395a0a7919..fc0a9c4484 100644 --- a/src/cmd/internal/obj/x86/obj6.go +++ b/src/cmd/internal/obj/x86/obj6.go @@ -614,27 +614,15 @@ func preprocess(ctxt *obj.Link, cursym *obj.LSym, newprog obj.ProgAlloc) { } } - var usefpheuristic bool - switch ctxt.Headtype { - case objabi.Hwindows, objabi.Hdarwin, objabi.Hlinux, objabi.Hdragonfly, - objabi.Hfreebsd, objabi.Hnetbsd, objabi.Hopenbsd, objabi.Hsolaris, objabi.Hplan9: - default: - usefpheuristic = true - } - var bpsize int if ctxt.Arch.Family == sys.AMD64 && !p.From.Sym.NoFrame() && // (1) below - !(autoffset == 0 && p.From.Sym.NoSplit() && usefpheuristic) && // (2) below - !(autoffset == 0 && !hasCall) { // (3) below + !(autoffset == 0 && !hasCall) { // (2) below // Make room to save a base pointer. // There are 2 cases we must avoid: // 1) If noframe is set (which we do for functions which tail call). - // 2) Scary runtime internals which would be all messed up by frame pointers. - // We detect these using a heuristic: frameless nosplit functions. - // TODO: Maybe someday we label them all with NOFRAME and get rid of this heuristic. // For performance, we also want to avoid: - // 3) Frameless leaf functions + // 2) Frameless leaf functions bpsize = ctxt.Arch.PtrSize autoffset += int32(bpsize) p.To.Offset += int64(bpsize) |