make callers of SvTRUE() more efficient

Where its obvious that the args can't be null, use SvTRUE_NN() instead.
Avoid possible multiple evaluations of the arg by assigning to a local var
first if necessary.

1 files changed, 4 insertions, 1 deletions

diff --git a/pp.c b/pp.c
index d76d0b877f..6acfcdc4ee 100644
--- a/pp.c
+++ b/pp.c
@@ -2621,8 +2621,11 @@ PP(pp_negate)
 PP(pp_not)
 {
     dSP;
+    SV *sv;
+
     tryAMAGICun_MG(not_amg, AMGf_set);
-    *PL_stack_sp = boolSV(!SvTRUE_nomg(*PL_stack_sp));
+    sv = *PL_stack_sp;
+    *PL_stack_sp = boolSV(!SvTRUE_nomg_NN(sv));
     return NORMAL;
 }