For tied file handle calls, use PUSH* when we know that the stack has space.

Previously the code was using XPUSH* in many cases, often to push back values
recently popped off the stack.

diff --git a/pp_sys.c b/pp_sys.c
index 8a05c96..a39453b 100644 (file)
--- a/pp_sys.c
+++ b/pp_sys.c
@@ -656,7 +656,7 @@ PP(pp_fileno)
        && (mg = SvTIED_mg((const SV *)io, PERL_MAGIC_tiedscalar)))
     {
        PUSHMARK(SP);
-       XPUSHs(SvTIED_obj(MUTABLE_SV(io), mg));
+       PUSHs(SvTIED_obj(MUTABLE_SV(io), mg));
        PUTBACK;
        ENTER_with_name("call_FILENO");
        call_method("FILENO", G_SCALAR);
@@ -729,9 +729,9 @@ PP(pp_binmode)
        MAGIC * const mg = SvTIED_mg((const SV *)io, PERL_MAGIC_tiedscalar);
        if (mg) {
            PUSHMARK(SP);
-           XPUSHs(SvTIED_obj(MUTABLE_SV(io), mg));
+           PUSHs(SvTIED_obj(MUTABLE_SV(io), mg));
            if (discp)
-               XPUSHs(discp);
+               PUSHs(discp);
            PUTBACK;
            ENTER_with_name("call_BINMODE");
            call_method("BINMODE", G_SCALAR);
@@ -879,7 +879,7 @@ PP(pp_untie)
            CV *cv;
            if (gv && isGV(gv) && (cv = GvCV(gv))) {
               PUSHMARK(SP);
-              XPUSHs(SvTIED_obj(MUTABLE_SV(gv), mg));
+              PUSHs(SvTIED_obj(MUTABLE_SV(gv), mg));
               mXPUSHi(SvREFCNT(obj) - 1);
               PUTBACK;
               ENTER_with_name("call_UNTIE");
@@ -1203,7 +1203,7 @@ PP(pp_getc)
        if (mg) {
            const I32 gimme = GIMME_V;
            PUSHMARK(SP);
-           XPUSHs(SvTIED_obj(MUTABLE_SV(io), mg));
+           PUSHs(SvTIED_obj(MUTABLE_SV(io), mg));
            PUTBACK;
            ENTER;
            call_method("GETC", gimme);
@@ -2026,7 +2026,7 @@ PP(pp_eof)
 
     if ((io = GvIO(gv)) && (mg = SvTIED_mg((const SV *)io, PERL_MAGIC_tiedscalar))) {
        PUSHMARK(SP);
-       XPUSHs(SvTIED_obj(MUTABLE_SV(io), mg));
+       PUSHs(SvTIED_obj(MUTABLE_SV(io), mg));
        /*
         * in Perl 5.12 and later, the additional paramter is a bitmask:
         * 0 = eof
@@ -2085,7 +2085,7 @@ PP(pp_tell)
        MAGIC * const mg = SvTIED_mg((const SV *)io, PERL_MAGIC_tiedscalar);
        if (mg) {
            PUSHMARK(SP);
-           XPUSHs(SvTIED_obj(MUTABLE_SV(io), mg));
+           PUSHs(SvTIED_obj(MUTABLE_SV(io), mg));
            PUTBACK;
            ENTER;
            call_method("TELL", G_SCALAR);
@@ -2126,13 +2126,13 @@ PP(pp_sysseek)
        MAGIC * const mg = SvTIED_mg((const SV *)io, PERL_MAGIC_tiedscalar);
        if (mg) {
            PUSHMARK(SP);
-           XPUSHs(SvTIED_obj(MUTABLE_SV(io), mg));
+           PUSHs(SvTIED_obj(MUTABLE_SV(io), mg));
 #if LSEEKSIZE > IVSIZE
-           mXPUSHn((NV) offset);
+           mPUSHn((NV) offset);
 #else
-           mXPUSHi(offset);
+           mPUSHi(offset);
 #endif
-           mXPUSHi(whence);
+           mPUSHi(whence);
            PUTBACK;
            ENTER;
            call_method("SEEK", G_SCALAR);