diff options
Diffstat (limited to 'gcc/simplify-rtx.cc')
| -rw-r--r-- | gcc/simplify-rtx.cc | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/gcc/simplify-rtx.cc b/gcc/simplify-rtx.cc index 3aaabdc..8016e02 100644 --- a/gcc/simplify-rtx.cc +++ b/gcc/simplify-rtx.cc @@ -3189,7 +3189,9 @@ simplify_context::simplify_binary_operation_1 (rtx_code code, rhs = XEXP (rhs, 0); } - if (rtx_equal_p (lhs, rhs)) + /* Keep PLUS of 2 volatile memory references. */ + if (rtx_equal_p (lhs, rhs) + && (!MEM_P (lhs) || !MEM_VOLATILE_P (lhs))) { rtx orig = gen_rtx_PLUS (int_mode, op0, op1); rtx coeff; |