6 files changed, 21 insertions, 3 deletions

diff --git a/src/lj_asm.c b/src/lj_asm.c
index 5f83779e..992dcf59 100644
--- a/src/lj_asm.c
+++ b/src/lj_asm.c
@@ -2142,9 +2142,12 @@ static void asm_setup_regsp(ASMState *as)
         if (ir->op2 != REF_NIL && as->evenspill < 4)
           as->evenspill = 4;  /* lj_cdata_newv needs 4 args. */
       }
+      /* fallthrough */
 #else
+      /* fallthrough */
     case IR_CNEW:
 #endif
+      /* fallthrough */
     case IR_TNEW: case IR_TDUP: case IR_CNEWI: case IR_TOSTR:
     case IR_BUFSTR:
       ir->prev = REGSP_HINT(RID_RET);
@@ -2165,6 +2168,7 @@ static void asm_setup_regsp(ASMState *as)
     case IR_LDEXP:
 #endif
 #endif
+      /* fallthrough */
     case IR_POW:
       if (!LJ_SOFTFP && irt_isnum(ir->t)) {
         if (inloop)
@@ -2176,7 +2180,7 @@ static void asm_setup_regsp(ASMState *as)
         continue;
 #endif
       }
-      /* fallthrough for integer POW */
+      /* fallthrough */ /* for integer POW */
     case IR_DIV: case IR_MOD:
       if (!irt_isnum(ir->t)) {
         ir->prev = REGSP_HINT(RID_RET);
@@ -2213,6 +2217,7 @@ static void asm_setup_regsp(ASMState *as)
     case IR_BSHL: case IR_BSHR: case IR_BSAR:
       if ((as->flags & JIT_F_BMI2))  /* Except if BMI2 is available. */
         break;
+      /* fallthrough */
     case IR_BROL: case IR_BROR:
       if (!irref_isk(ir->op2) && !ra_hashint(IR(ir->op2)->r)) {
         IR(ir->op2)->r = REGSP_HINT(RID_ECX);
diff --git a/src/lj_cparse.c b/src/lj_cparse.c
index 83cfd112..19f632ff 100644
--- a/src/lj_cparse.c
+++ b/src/lj_cparse.c
@@ -576,28 +576,34 @@ static void cp_expr_infix(CPState *cp, CPValue *k, int pri)
         k->id = k2.id > k3.id ? k2.id : k3.id;
         continue;
       }
+      /* fallthrough */
     case 1:
       if (cp_opt(cp, CTOK_OROR)) {
         cp_expr_sub(cp, &k2, 2); k->i32 = k->u32 || k2.u32; k->id = CTID_INT32;
         continue;
       }
+      /* fallthrough */
     case 2:
       if (cp_opt(cp, CTOK_ANDAND)) {
         cp_expr_sub(cp, &k2, 3); k->i32 = k->u32 && k2.u32; k->id = CTID_INT32;
         continue;
       }
+      /* fallthrough */
     case 3:
       if (cp_opt(cp, '|')) {
         cp_expr_sub(cp, &k2, 4); k->u32 = k->u32 | k2.u32; goto arith_result;
       }
+      /* fallthrough */
     case 4:
       if (cp_opt(cp, '^')) {
         cp_expr_sub(cp, &k2, 5); k->u32 = k->u32 ^ k2.u32; goto arith_result;
       }
+      /* fallthrough */
     case 5:
       if (cp_opt(cp, '&')) {
         cp_expr_sub(cp, &k2, 6); k->u32 = k->u32 & k2.u32; goto arith_result;
       }
+      /* fallthrough */
     case 6:
       if (cp_opt(cp, CTOK_EQ)) {
         cp_expr_sub(cp, &k2, 7); k->i32 = k->u32 == k2.u32; k->id = CTID_INT32;
@@ -606,6 +612,7 @@ static void cp_expr_infix(CPState *cp, CPValue *k, int pri)
         cp_expr_sub(cp, &k2, 7); k->i32 = k->u32 != k2.u32; k->id = CTID_INT32;
         continue;
       }
+      /* fallthrough */
     case 7:
       if (cp_opt(cp, '<')) {
         cp_expr_sub(cp, &k2, 8);
@@ -640,6 +647,7 @@ static void cp_expr_infix(CPState *cp, CPValue *k, int pri)
         k->id = CTID_INT32;
         continue;
       }
+      /* fallthrough */
     case 8:
       if (cp_opt(cp, CTOK_SHL)) {
         cp_expr_sub(cp, &k2, 9); k->u32 = k->u32 << k2.u32;
@@ -652,6 +660,7 @@ static void cp_expr_infix(CPState *cp, CPValue *k, int pri)
           k->u32 = k->u32 >> k2.u32;
         continue;
       }
+      /* fallthrough */
     case 9:
       if (cp_opt(cp, '+')) {
         cp_expr_sub(cp, &k2, 10); k->u32 = k->u32 + k2.u32;
@@ -661,6 +670,7 @@ static void cp_expr_infix(CPState *cp, CPValue *k, int pri)
       } else if (cp_opt(cp, '-')) {
         cp_expr_sub(cp, &k2, 10); k->u32 = k->u32 - k2.u32; goto arith_result;
       }
+      /* fallthrough */
     case 10:
       if (cp_opt(cp, '*')) {
         cp_expr_unary(cp, &k2); k->u32 = k->u32 * k2.u32; goto arith_result;
diff --git a/src/lj_err.c b/src/lj_err.c
index b6be357e..abf176e5 100644
--- a/src/lj_err.c
+++ b/src/lj_err.c
@@ -150,6 +150,7 @@ static void *err_unwind(lua_State *L, void *stopcf, int errcode)
     case FRAME_CONT:  /* Continuation frame. */
       if (frame_iscont_fficb(frame))
         goto unwind_c;
+      /* fallthrough */
     case FRAME_VARG:  /* Vararg frame. */
       frame = frame_prevd(frame);
       break;
diff --git a/src/lj_opt_sink.c b/src/lj_opt_sink.c
index a16d112f..c16363e7 100644
--- a/src/lj_opt_sink.c
+++ b/src/lj_opt_sink.c
@@ -100,8 +100,8 @@ static void sink_mark_ins(jit_State *J)
            (LJ_32 && ir+1 < irlast && (ir+1)->o == IR_HIOP &&
             !sink_checkphi(J, ir, (ir+1)->op2))))
         irt_setmark(ir->t);  /* Mark ineligible allocation. */
-      /* fallthrough */
 #endif
+      /* fallthrough */
     case IR_USTORE:
       irt_setmark(IR(ir->op2)->t);  /* Mark stored value. */
       break;
diff --git a/src/lj_parse.c b/src/lj_parse.c
index 08f7cfa6..c8efafad 100644
--- a/src/lj_parse.c
+++ b/src/lj_parse.c
@@ -2667,7 +2667,8 @@ static int parse_stmt(LexState *ls)
       lj_lex_next(ls);
       parse_goto(ls);
       break;
-    }  /* else: fallthrough */
+    }
+    /* fallthrough */
   default:
     parse_call_assign(ls);
     break;
diff --git a/src/luajit.c b/src/luajit.c
index 1ca24301..3a3ec247 100644
--- a/src/luajit.c
+++ b/src/luajit.c
@@ -421,6 +421,7 @@ static int collectargs(char **argv, int *flags)
       break;
     case 'e':
       *flags |= FLAGS_EXEC;
+      /* fallthrough */
     case 'j':  /* LuaJIT extension */
     case 'l':
       *flags |= FLAGS_OPTION;