From: Eric Botcazou <ebotca...@adacore.com>
gcc/ada/
* gcc-interface/utils2.cc (build_binary_op) <MODIFY_EXPR>: Do not
remove a VIEW_CONVERT_EXPR on the LHS if it is also on the RHS.
Tested on x86_64-pc-linux-gnu, committed on master.
---
gcc/ada/gcc-interface/utils2.cc | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/gcc/ada/gcc-interface/utils2.cc b/gcc/ada/gcc-interface/utils2.cc
index e1737724b65..95bbce2f1b4 100644
--- a/gcc/ada/gcc-interface/utils2.cc
+++ b/gcc/ada/gcc-interface/utils2.cc
@@ -878,7 +878,8 @@ build_binary_op (enum tree_code op_code, tree result_type,
them; we'll be putting them back below if needed. Likewise for
conversions between record types, except for justified modular types.
But don't do this if the right operand is not BLKmode (for packed
- arrays) unless we are not changing the mode. */
+ arrays) unless we are not changing the mode, or if both ooperands
+ are view conversions to the same type. */
while ((CONVERT_EXPR_P (left_operand)
|| TREE_CODE (left_operand) == VIEW_CONVERT_EXPR)
&& (((INTEGRAL_TYPE_P (left_type)
@@ -890,7 +891,10 @@ build_binary_op (enum tree_code op_code, tree result_type,
&& TREE_CODE (operand_type (left_operand)) == RECORD_TYPE
&& (TYPE_MODE (right_type) == BLKmode
|| TYPE_MODE (left_type)
- == TYPE_MODE (operand_type (left_operand))))))
+ == TYPE_MODE (operand_type (left_operand)))
+ && !(TREE_CODE (left_operand) == VIEW_CONVERT_EXPR
+ && TREE_CODE (right_operand) == VIEW_CONVERT_EXPR
+ && left_type == right_type))))
{
left_operand = TREE_OPERAND (left_operand, 0);
left_type = TREE_TYPE (left_operand);
--
2.40.0
