The purpose of this function is to create a new temporary expression
and generate store statement which will copy the result of given
expression into a temporary expression.
Signed-off-by: Tomek Grabiec <tgrab...@gmail.com>
---
include/jit/expression.h | 3 +++
jit/expression.c | 30 ++++++++++++++++++++++++++++++
2 files changed, 33 insertions(+), 0 deletions(-)
diff --git a/include/jit/expression.h b/include/jit/expression.h
index f95e021..4af40ad 100644
--- a/include/jit/expression.h
+++ b/include/jit/expression.h
@@ -12,6 +12,8 @@
#include <arch/instruction.h>
+struct parse_context;
+
enum expression_type {
EXPR_VALUE,
EXPR_FVALUE,
@@ -308,6 +310,7 @@ struct expression *exception_ref_expr(void);
struct expression *null_check_expr(struct expression *);
struct expression *array_size_check_expr(struct expression *);
struct expression *multiarray_size_check_expr(struct expression *);
+struct expression *copy_expr_value(struct parse_context *, struct expression
*);
unsigned long nr_args(struct expression *);
int expr_nr_kids(struct expression *);
diff --git a/jit/expression.c b/jit/expression.c
index 7ea8fbd..8e79829 100644
--- a/jit/expression.c
+++ b/jit/expression.c
@@ -5,6 +5,7 @@
* LICENSE for details.
*/
+#include <jit/statement.h>
#include <jit/expression.h>
#include <jit/bc-offset-mapping.h>
@@ -387,3 +388,32 @@ struct expression *multiarray_size_check_expr(struct
expression *dimensions)
return expr;
}
+
+struct expression *
+copy_expr_value(struct parse_context *ctx, struct expression *expr)
+
+{ struct var_info *tmp_high;
+ struct var_info *tmp_low;
+ struct expression *dest;
+ struct statement *stmt;
+
+ tmp_low = get_var(ctx->cu);
+
+ if (expr->vm_type == J_LONG)
+ tmp_high = get_var(ctx->cu);
+ else
+ tmp_high = NULL;
+
+ dest = temporary_expr(expr->vm_type, tmp_high, tmp_low);
+
+ stmt = alloc_statement(STMT_STORE);
+ if (!stmt)
+ return NULL;
+
+ expr_get(dest);
+ stmt->store_dest = &dest->node;
+ stmt->store_src = &expr->node;
+ convert_statement(ctx, stmt);
+
+ return dest;
+}
--
1.6.0.6
------------------------------------------------------------------------------
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