bc: simplify use of "ip" in loop parsing functions

function                                             old     new   delta
zbc_parse_stmt_possibly_auto                        2106    2065     -41
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-41)             Total: -41 bytes
   text	   data	    bss	    dec	    hex	filename
 982076	    485	   7296	 989857	  f1aa1	busybox_old
 982035	    485	   7296	 989816	  f1a78	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

2 files changed, 33 insertions, 6 deletions

diff --git a/miscutils/bc.c b/miscutils/bc.c
index f85ab1aea..925950d78 100644
--- a/miscutils/bc.c
+++ b/miscutils/bc.c
@@ -4174,7 +4174,6 @@ static BC_STATUS zbc_parse_while(BcParse *p)
 {
         BcStatus s;
         BcInstPtr ip;
-        BcInstPtr *ipp;
         size_t *label;
         size_t n;
 
@@ -4214,14 +4213,13 @@ static BC_STATUS zbc_parse_while(BcParse *p)
         bc_parse_push(p, BC_INST_JUMP);
         bc_parse_pushIndex(p, n);
 
-        ipp = bc_vec_top(&p->exits);
         label = bc_vec_top(&p->conds);
 
         dbg_lex("%s:%d BC_INST_JUMP to %d", __func__, __LINE__, *label);
         bc_parse_push(p, BC_INST_JUMP);
         bc_parse_pushIndex(p, *label);
 
-        label = bc_vec_item(&p->func->labels, ipp->idx);
+        label = bc_vec_item(&p->func->labels, ip.idx);
         dbg_lex("%s:%d rewriting label: %d -> %d", __func__, __LINE__, *label, p->func->code.len);
         *label = p->func->code.len;
 
@@ -4238,7 +4236,6 @@ static BC_STATUS zbc_parse_for(BcParse *p)
 {
         BcStatus s;
         BcInstPtr ip;
-        BcInstPtr *ipp;
         size_t *label;
         size_t cond_idx, exit_idx, body_idx, update_idx;
         size_t n;
@@ -4318,7 +4315,6 @@ static BC_STATUS zbc_parse_for(BcParse *p)
         bc_parse_push(p, BC_INST_JUMP);
         bc_parse_pushIndex(p, n);
 
-        ipp = bc_vec_top(&p->exits);
         label = bc_vec_top(&p->conds);
 
 //TODO: commonalize?
@@ -4326,7 +4322,7 @@ static BC_STATUS zbc_parse_for(BcParse *p)
         bc_parse_push(p, BC_INST_JUMP);
         bc_parse_pushIndex(p, *label);
 
-        label = bc_vec_item(&p->func->labels, ipp->idx);
+        label = bc_vec_item(&p->func->labels, ip.idx);
         dbg_lex("%s:%d rewriting label: %d -> %d", __func__, __LINE__, *label, p->func->code.len);
         *label = p->func->code.len;
 
diff --git a/testsuite/bc.tests b/testsuite/bc.tests
index 21b26008f..987461ebb 100755
--- a/testsuite/bc.tests
+++ b/testsuite/bc.tests
@@ -76,6 +76,37 @@ testing "bc print 1,2,3" \
         "123" \
         "" "print 1,2,3"
 
+testing "bc nested loops and breaks" \
+        "bc" \
+        "\
+11
+21
+31
+22
+12
+99
+" \
+        "" "\
+if(1) {
+        11
+        while(1) {
+                21
+                while(1) {
+                        31
+                        break
+                        32
+                }
+                22
+                break
+                23
+        }
+        12
+} else {
+        88
+}
+99
+"
+
 tar xJf bc_large.tar.xz
 
 for f in bc*.bc; do