From: Aleksey Demakov <ademakov@gmail.com>
Date: Sun, 7 Oct 2007 14:16:50 +0000 (+0000)
Subject: add jit_function_reserve_label function
X-Git-Tag: before.move.to.git~135
X-Git-Url: https://git.unchartedbackwaters.co.uk/w/?a=commitdiff_plain;h=e0f954a6728c4f239e199dd9af8a6ee1255e9f6b;p=francis%2Flibjit.git

add jit_function_reserve_label function
---

diff --git a/ChangeLog b/ChangeLog
index 2554779..2c30f58 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -3,6 +3,10 @@
 	* jit/jit-rules-x86.ins (JIT_OP_JUMP_TABLE): fix jump table code
 	generation.
 
+	* include/jit/jit-function.h: 
+	* jit/jit-function.c (jit_function_reserve_label): add new function
+	to create labels for jump tables.
+
 2007-06-11  Aleksey Demakov  <ademakov@gmail.com>
 
 	* jit/jit-insn.c (accumulate_relative_offset): remove.
diff --git a/include/jit/jit-function.h b/include/jit/jit-function.h
index b9d6db7..d2851bb 100644
--- a/include/jit/jit-function.h
+++ b/include/jit/jit-function.h
@@ -75,6 +75,7 @@ void jit_function_set_optimization_level
 unsigned int jit_function_get_optimization_level
 	(jit_function_t func) JIT_NOTHROW;
 unsigned int jit_function_get_max_optimization_level(void) JIT_NOTHROW;
+jit_label_t jit_function_reserve_label(jit_function_t func) JIT_NOTHROW;
 
 #ifdef	__cplusplus
 };
diff --git a/jit/jit-function.c b/jit/jit-function.c
index 0c0bcfb..b5afd9a 100644
--- a/jit/jit-function.c
+++ b/jit/jit-function.c
@@ -1635,3 +1635,23 @@ unsigned int jit_function_get_max_optimization_level(void)
 	/* TODO - implement more than basic optimization */
 	return 0;
 }
+
+/*@
+ * @deftypefun {jit_label_t} jit_function_reserve_label (jit_function_t func)
+ * Allocate a new label for later use within the function @code{func}. Most
+ * instructions that require a label could perform label allocation themselves.
+ * A separate label allocation could be useful to fill a jump table with
+ * identical entries.
+ * @end deftypefun
+@*/
+jit_label_t
+jit_function_reserve_label(jit_function_t func)
+{
+	/* Ensure that we have a function builder */
+	if(!_jit_function_ensure_builder(func))
+	{
+		return jit_label_undefined;
+	}
+
+	return (func->builder->next_label)++;
+}