diff options
Diffstat (limited to 'gcc/tree-ssa-operands.c')
| -rw-r--r-- | gcc/tree-ssa-operands.c | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/gcc/tree-ssa-operands.c b/gcc/tree-ssa-operands.c index 24cd364..6787dc2 100644 --- a/gcc/tree-ssa-operands.c +++ b/gcc/tree-ssa-operands.c @@ -1778,14 +1778,25 @@ add_call_clobber_ops (tree stmt, tree callee) EXECUTE_IF_SET_IN_BITMAP (call_clobbered_vars, 0, u, bi) { tree var = referenced_var (u); + unsigned int uid = u; + if (unmodifiable_var_p (var)) add_stmt_operand (&var, &empty_ann, opf_none); else { - bool not_read - = not_read_b ? bitmap_bit_p (not_read_b, u) : false; - bool not_written - = not_written_b ? bitmap_bit_p (not_written_b, u) : false; + bool not_read; + bool not_written; + + /* Not read and not written are computed on regular vars, not + subvars, so look at the parent var if this is an SFT. */ + + if (TREE_CODE (var) == STRUCT_FIELD_TAG) + uid = DECL_UID (SFT_PARENT_VAR (var)); + + not_read = + not_read_b ? bitmap_bit_p (not_read_b, uid) : false; + not_written = + not_written_b ? bitmap_bit_p (not_written_b, uid) : false; if (not_written) { |