From 956dead48069a07eb1211283ae5b276ef45f6768 Mon Sep 17 00:00:00 2001
From: mame <mame@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Sat, 24 May 2008 06:29:48 +0000
Subject: [PATCH] * compile.c (iseq_set_exception_table, NODE_WHILE,
 NODE_NEXT): remove   special handling that decrements sp in CATCH_TYPE_NEXT
 for NODE_WHILE.

* vm.c (vm_eval_body), vm_insnhelper.c (vm_throw): remove unused code.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@16568 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 ChangeLog       |  7 +++++++
 compile.c       | 24 +++++++++++++++++-------
 vm.c            |  6 +-----
 vm_insnhelper.c |  7 +------
 4 files changed, 26 insertions(+), 18 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index d0893e37e7..8fbebd7b1f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+Sat May 24 15:26:16 2008  Yusuke Endoh  <mame@tsg.ne.jp>
+
+	* compile.c (iseq_set_exception_table, NODE_WHILE, NODE_NEXT): remove
+	  special handling that decrements sp in CATCH_TYPE_NEXT for NODE_WHILE.
+
+	* vm.c (vm_eval_body), vm_insnhelper.c (vm_throw): remove unused code.
+
 Sat May 24 08:13:34 2008  NARUSE, Yui  <naruse@ruby-lang.org>
 
 	* transcode.c (rb_str_transcode): argc is 1, and argv is &to.
diff --git a/compile.c b/compile.c
index ec8b26f33b..1e7041a592 100644
--- a/compile.c
+++ b/compile.c
@@ -1317,8 +1317,7 @@ iseq_set_exception_table(rb_iseq_t *iseq)
 	    /* TODO: Dirty Hack!  Fix me */
 	    if (entry->type == CATCH_TYPE_RESCUE ||
 		entry->type == CATCH_TYPE_BREAK ||
-		(((ptr[0] & 0x10000) == 0)
-		 && entry->type == CATCH_TYPE_NEXT)) {
+		entry->type == CATCH_TYPE_NEXT) {
 		entry->sp--;
 	    }
 	}
@@ -2935,12 +2934,24 @@ iseq_compile_each(rb_iseq_t *iseq, LINK_ANCHOR *ret, NODE * node, int poped)
 	LABEL *break_label = iseq->compile_data->end_label = NEW_LABEL(nd_line(node));	/* break */
 	LABEL *end_label = NEW_LABEL(nd_line(node));
 
+	LABEL *next_catch_label = NEW_LABEL(nd_line(node));
+	LABEL *tmp_label = NULL;
+
 	iseq->compile_data->loopval_popped = 0;
 	iseq->compile_data->ensure_node_stack = 0;
 
 	if (type == NODE_OPT_N || node->nd_state == 1) {
 	    ADD_INSNL(ret, nd_line(node), jump, next_label);
 	}
+	else {
+	    tmp_label = NEW_LABEL(nd_line(node));
+	    ADD_INSNL(ret, nd_line(node), jump, tmp_label);
+	}
+	ADD_INSN(ret, nd_line(node), putnil);
+	ADD_LABEL(ret, next_catch_label);
+	ADD_INSN(ret, nd_line(node), pop);
+	ADD_INSNL(ret, nd_line(node), jump, next_label);
+	if (tmp_label) ADD_LABEL(ret, tmp_label);
 
 	ADD_LABEL(ret, redo_label);
 	COMPILE_POPED(ret, "while body", node->nd_body);
@@ -2972,7 +2983,7 @@ iseq_compile_each(rb_iseq_t *iseq, LINK_ANCHOR *ret, NODE * node, int poped)
 	    ADD_INSN(ret, nd_line(node), putnil);
 	}
 
-	ADD_LABEL(ret, break_label);	/* braek */
+	ADD_LABEL(ret, break_label);	/* break */
 
 	if (poped) {
 	    ADD_INSN(ret, nd_line(node), pop);
@@ -2980,8 +2991,8 @@ iseq_compile_each(rb_iseq_t *iseq, LINK_ANCHOR *ret, NODE * node, int poped)
 
 	ADD_CATCH_ENTRY(CATCH_TYPE_BREAK, redo_label, break_label,
 			0, break_label);
-	ADD_CATCH_ENTRY(CATCH_TYPE_NEXT | 0x10000, redo_label,
-			break_label, 0, iseq->compile_data->start_label);
+	ADD_CATCH_ENTRY(CATCH_TYPE_NEXT, redo_label, break_label, 0,
+			next_catch_label);
 	ADD_CATCH_ENTRY(CATCH_TYPE_REDO, redo_label, break_label, 0,
 			iseq->compile_data->redo_label);
 
@@ -3119,13 +3130,12 @@ iseq_compile_each(rb_iseq_t *iseq, LINK_ANCHOR *ret, NODE * node, int poped)
 	    rb_iseq_t *ip;
 	    ip = iseq;
 	    while (ip) {
-		level = 0x8000;
+		level = 0x8000 | 0x4000;
 		if (ip->compile_data->redo_label != 0) {
 		    /* while loop */
 		    break;
 		}
 		else if (ip->type == ISEQ_TYPE_BLOCK) {
-		    level |= 0x4000;
 		    break;
 		}
 		else if (ip->type == ISEQ_TYPE_EVAL) {
diff --git a/vm.c b/vm.c
index 708a6ac76b..c97cd2b3c2 100644
--- a/vm.c
+++ b/vm.c
@@ -1259,9 +1259,7 @@ vm_eval_body(rb_thread_t *th)
 			cfp->pc = cfp->iseq->iseq_encoded + entry->cont;
 			cfp->sp = cfp->bp + entry->sp;
 
-			if (!(state == TAG_REDO) &&
-			    !(state == TAG_NEXT && !escape_dfp) &&
-			    !(state == TAG_BREAK && !escape_dfp)) {
+			if (state != TAG_REDO) {
 #if OPT_STACK_CACHING
 			    initial = (GET_THROWOBJ_VAL(err));
 #else
@@ -1276,12 +1274,10 @@ vm_eval_body(rb_thread_t *th)
 	}
 	else if (state == TAG_REDO) {
 	    type = CATCH_TYPE_REDO;
-	    escape_dfp = GET_THROWOBJ_CATCH_POINT(err);
 	    goto search_restart_point;
 	}
 	else if (state == TAG_NEXT) {
 	    type = CATCH_TYPE_NEXT;
-	    escape_dfp = GET_THROWOBJ_CATCH_POINT(err);
 	    goto search_restart_point;
 	}
 	else {
diff --git a/vm_insnhelper.c b/vm_insnhelper.c
index bf9ded1313..6fb867a9b9 100644
--- a/vm_insnhelper.c
+++ b/vm_insnhelper.c
@@ -1204,12 +1204,7 @@ vm_throw(rb_thread_t *th, rb_control_frame_t *reg_cfp,
 	VALUE *pt = 0;
 	int i;
 	if (flag != 0) {
-	    if (throw_state & 0x4000) {
-		pt = (void *)1;
-	    }
-	    else {
-		pt = 0;
-	    }
+	    pt = (void *) 1;
 	}
 	else {
 	    if (state == TAG_BREAK) {