diff options
Diffstat (limited to 'gcc/expr.c')
| -rw-r--r-- | gcc/expr.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/gcc/expr.c b/gcc/expr.c index b0e958c23b6..f59cc426a17 100644 --- a/gcc/expr.c +++ b/gcc/expr.c @@ -3988,13 +3988,16 @@ expand_assignment (tree to, tree from) rtx result; /* Don't crash if the lhs of the assignment was erroneous. */ - if (TREE_CODE (to) == ERROR_MARK) { result = expand_normal (from); return; } + /* Optimize away no-op moves without side-effects. */ + if (operand_equal_p (to, from, 0)) + return; + /* Assignment of a structure component needs special treatment if the structure component's rtx is not simply a MEM. Assignment of an array element at a constant index, and assignment of |
