rename POPFOO() to CX_POPFOO()

Rename all the context-popping macros such as POPBLOCK and POPSUB, by
giving them a CX_ prefix. (Do TOPBLOCK too).

This is principally to  deliberately break any existing non-core use of
these non-API macros, as their behaviour has changed in this branch.
In particular, POPBLOCK(cx) no longer decrements the cxt stack pointer
nor sets cx; instead, cx is now expected to already point to the stack
frame which POPBLOCK should process.

At the same time, giving them a CX_ prefix makes it clearer that these
are all part of a family of macros that manipulate the context stack.

The PUSHFOO() macros will be renamed in a later commit.

1 files changed, 3 insertions, 3 deletions

diff --git a/pp_hot.c b/pp_hot.c
index 8b8a0adf8e..824e7e767c 100644
--- a/pp_hot.c
+++ b/pp_hot.c
@@ -3639,8 +3639,8 @@ PP(pp_leavesub)
         leave_adjust_stacks(oldsp, oldsp, gimme, 0);
 
     CX_LEAVE_SCOPE(cx);
-    POPSUB(cx);	/* Stack values are safe: release CV and @_ ... */
-    POPBLOCK(cx);
+    CX_POPSUB(cx);	/* Stack values are safe: release CV and @_ ... */
+    CX_POPBLOCK(cx);
     retop = cx->blk_sub.retop;
     CX_POP(cx);
 
@@ -3875,7 +3875,7 @@ PP(pp_entersub)
 
             /* it's the responsibility of whoever leaves a sub to ensure
              * that a clean, empty AV is left in pad[0]. This is normally
-             * done by POPSUB() */
+             * done by CX_POPSUB() */
             assert(!AvREAL(av) && AvFILLp(av) == -1);
 
             items = SP - MARK;