fix typo

[libfirm] / ir / be / ia32 / ia32_transform.c

diff --git a/ir/be/ia32/ia32_transform.c b/ir/be/ia32/ia32_transform.c
index dc011d0..bc5a381 100644 (file)
--- a/ir/be/ia32/ia32_transform.c
+++ b/ir/be/ia32/ia32_transform.c
@@ -722,7 +722,7 @@ static int is_downconv(const ir_node *node)
                get_mode_size_bits(dest_mode) <= get_mode_size_bits(src_mode);
 }
 
-/* Skip all Down-Conv's on a given node and return the resulting node. */
+/** Skip all Down-Conv's on a given node and return the resulting node. */
 ir_node *ia32_skip_downconv(ir_node *node)
 {
        while (is_downconv(node))
@@ -731,6 +731,31 @@ ir_node *ia32_skip_downconv(ir_node *node)
        return node;
 }
 
+static bool is_sameconv(ir_node *node)
+{
+       ir_mode *src_mode;
+       ir_mode *dest_mode;
+
+       if (!is_Conv(node))
+               return 0;
+
+       src_mode  = get_irn_mode(get_Conv_op(node));
+       dest_mode = get_irn_mode(node);
+       return
+               ia32_mode_needs_gp_reg(src_mode)  &&
+               ia32_mode_needs_gp_reg(dest_mode) &&
+               get_mode_size_bits(dest_mode) == get_mode_size_bits(src_mode);
+}
+
+/** Skip all signedness convs */
+static ir_node *ia32_skip_sameconv(ir_node *node)
+{
+       while (is_sameconv(node))
+               node = get_Conv_op(node);
+
+       return node;
+}
+
 static ir_node *create_upconv(ir_node *node, ir_node *orig_node)
 {
        ir_mode  *mode = get_irn_mode(node);
@@ -798,6 +823,11 @@ static void match_arguments(ia32_address_mode_t *am, ir_node *block,
                if (op1 != NULL) {
                        op1 = ia32_skip_downconv(op1);
                }
+       } else {
+               op2 = ia32_skip_sameconv(op2);
+               if (op1 != NULL) {
+                       op1 = ia32_skip_sameconv(op1);
+               }
        }
 
        /* match immediates. firm nodes are normalized: constants are always on the