diff options
Diffstat (limited to 'gcc/expr.cc')
| -rw-r--r-- | gcc/expr.cc | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/gcc/expr.cc b/gcc/expr.cc index 2918c46..8a1875d 100644 --- a/gcc/expr.cc +++ b/gcc/expr.cc @@ -5466,6 +5466,7 @@ emit_push_insn (rtx x, machine_mode mode, tree type, rtx size, /* If source is a constant VAR_DECL with a simple constructor, store the constructor to the stack instead of moving it. */ const_tree decl; + HOST_WIDE_INT sz; if (partial == 0 && MEM_P (xinner) && SYMBOL_REF_P (XEXP (xinner, 0)) @@ -5473,9 +5474,11 @@ emit_push_insn (rtx x, machine_mode mode, tree type, rtx size, && VAR_P (decl) && TREE_READONLY (decl) && !TREE_SIDE_EFFECTS (decl) - && immediate_const_ctor_p (DECL_INITIAL (decl), 2)) - store_constructor (DECL_INITIAL (decl), target, 0, - int_expr_size (DECL_INITIAL (decl)), false); + && immediate_const_ctor_p (DECL_INITIAL (decl), 2) + && (sz = int_expr_size (DECL_INITIAL (decl))) > 0 + && CONST_INT_P (size) + && INTVAL (size) == sz) + store_constructor (DECL_INITIAL (decl), target, 0, sz, false); else emit_block_move (target, xinner, size, BLOCK_OP_CALL_PARM); } |