diff options
Diffstat (limited to 'gcc/fold-const.c')
| -rw-r--r-- | gcc/fold-const.c | 48 |
1 files changed, 41 insertions, 7 deletions
diff --git a/gcc/fold-const.c b/gcc/fold-const.c index ba683ad3f2b..3fa46cafe87 100644 --- a/gcc/fold-const.c +++ b/gcc/fold-const.c @@ -1993,14 +1993,48 @@ fold_convert (tree type, tree arg) tree non_lvalue (tree x) { - /* These things are certainly not lvalues. */ - if (TREE_CODE (x) == NON_LVALUE_EXPR - || TREE_CODE (x) == INTEGER_CST - || TREE_CODE (x) == REAL_CST - || TREE_CODE (x) == STRING_CST - || TREE_CODE (x) == ADDR_EXPR) + /* We only need to wrap lvalue tree codes. */ + switch (TREE_CODE (x)) + { + case VAR_DECL: + case PARM_DECL: + case RESULT_DECL: + case LABEL_DECL: + case FUNCTION_DECL: + case SSA_NAME: + + case COMPONENT_REF: + case INDIRECT_REF: + case ARRAY_REF: + case BIT_FIELD_REF: + case BUFFER_REF: + case ARRAY_RANGE_REF: + case VTABLE_REF: + + case REALPART_EXPR: + case IMAGPART_EXPR: + case PREINCREMENT_EXPR: + case PREDECREMENT_EXPR: + case SAVE_EXPR: + case UNSAVE_EXPR: + case TRY_CATCH_EXPR: + case WITH_CLEANUP_EXPR: + case COMPOUND_EXPR: + case MODIFY_EXPR: + case TARGET_EXPR: + case COND_EXPR: + case BIND_EXPR: + case MIN_EXPR: + case MAX_EXPR: + case RTL_EXPR: + break; + + default: + /* Assume the worst for front-end tree codes. */ + if ((int)TREE_CODE (x) >= NUM_TREE_CODES) + break; return x; - + } return build1 (NON_LVALUE_EXPR, TREE_TYPE (x), x); } |