X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=mro.c;h=77112e1acdb84c5a9af757d8bfd449da3bddb582;hb=d2aeed1648166d254ac68525c35b77dec4ba8772;hp=5f9bcfec327559a533889a93edbac309749d6174;hpb=ec49eb61487587a42bcd56c4dcb46adecfe24bd4;p=p5sagit%2Fp5-mst-13.2.git

diff --git a/mro.c b/mro.c
index 5f9bcfe..77112e1 100644
--- a/mro.c
+++ b/mro.c
@@ -554,19 +554,12 @@ Perl_mro_isa_changed_in(pTHX_ HV* stash)
         HE *he = hv_fetch_ent(PL_isarev, sv, TRUE, 0);
 
 	/* That fetch should not fail.  But if it had to create a new SV for
-	   us, then we can detect it, because it will not be the correct type.
-	   Probably faster and cleaner for us to free that scalar [very little
-	   code actually executed to free it] and create a new HV than to
-	   copy&paste [SIN!] the code from newHV() to allow us to upgrade the
-	   new SV from SVt_NULL.  */
+	   us, then will need to upgrade it to an HV (which sv_upgrade() can
+	   now do for us. */
 
         mroisarev = (HV*)HeVAL(he);
 
-	if(SvTYPE(mroisarev) != SVt_PVHV) {
-	    SvREFCNT_dec(mroisarev);
-	    mroisarev = newHV();
-	    HeVAL(he) = (SV *)mroisarev;
-        }
+	SvUPGRADE((SV*)mroisarev, SVt_PVHV);
 
 	/* This hash only ever contains PL_sv_yes. Storing it over itself is
 	   almost as cheap as calling hv_exists, so on aggregate we expect to
@@ -829,7 +822,7 @@ XS(XS_mro_get_isarev)
         while((iter = hv_iternext(isarev)))
             av_push(ret_array, newSVsv(hv_iterkeysv(iter)));
     }
-    XPUSHs(sv_2mortal(newRV_noinc((SV*)ret_array)));
+    mXPUSHs(newRV_noinc((SV*)ret_array));
 
     PUTBACK;
     return;
@@ -919,9 +912,7 @@ XS(XS_mro_get_pkg_gen)
 
     SP -= items;
 
-    XPUSHs(sv_2mortal(newSViv(
-        class_stash ? HvMROMETA(class_stash)->pkg_gen : 0
-    )));
+    mXPUSHi(class_stash ? HvMROMETA(class_stash)->pkg_gen : 0);
     
     PUTBACK;
     return;
@@ -1048,7 +1039,7 @@ XS(XS_mro_nextcan)
 		    Perl_croak(aTHX_ "No next::method '%s' found for %s", subname, hvname);
                 XSRETURN_EMPTY;
 	    }
-	    XPUSHs(sv_2mortal(newRV_inc(val)));
+	    mXPUSHs(newRV_inc(val));
             XSRETURN(1);
 	}
     }
@@ -1056,7 +1047,7 @@ XS(XS_mro_nextcan)
     /* beyond here is just for cache misses, so perf isn't as critical */
 
     stashname_len = subname - fq_subname - 2;
-    stashname = sv_2mortal(newSVpvn(fq_subname, stashname_len));
+    stashname = newSVpvn_flags(fq_subname, stashname_len, SVs_TEMP);
 
     linear_av = mro_get_linear_isa_c3(selfstash, 0); /* has ourselves at the top of the list */
 
@@ -1109,7 +1100,7 @@ XS(XS_mro_nextcan)
             if (SvTYPE(candidate) == SVt_PVGV && (cand_cv = GvCV(candidate)) && !GvCVGEN(candidate)) {
                 SvREFCNT_inc_simple_void_NN((SV*)cand_cv);
                 (void)hv_store_ent(nmcache, newSVsv(sv), (SV*)cand_cv, 0);
-                XPUSHs(sv_2mortal(newRV_inc((SV*)cand_cv)));
+                mXPUSHs(newRV_inc((SV*)cand_cv));
                 XSRETURN(1);
             }
         }