diff options
Diffstat (limited to 'gcc/builtins.c')
| -rw-r--r-- | gcc/builtins.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/gcc/builtins.c b/gcc/builtins.c index 2997462..46f97f9 100644 --- a/gcc/builtins.c +++ b/gcc/builtins.c @@ -7893,6 +7893,17 @@ fold_builtin_exponent (tree fndecl, tree arglist, return 0; } +/* Return true if VAR is a VAR_DECL or a component thereof. */ + +static bool +var_decl_component_p (tree var) +{ + tree inner = var; + while (handled_component_p (inner)) + inner = TREE_OPERAND (inner, 0); + return SSA_VAR_P (inner); +} + /* Fold function call to builtin memset. Return NULL_TREE if no simplification can be made. */ @@ -7933,6 +7944,9 @@ fold_builtin_memset (tree arglist, tree type, bool ignore) && !POINTER_TYPE_P (TREE_TYPE (var))) return 0; + if (! var_decl_component_p (var)) + return 0; + length = tree_low_cst (len, 1); if (GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (var))) != length || get_pointer_alignment (dest, BIGGEST_ALIGNMENT) / BITS_PER_UNIT @@ -8044,6 +8058,9 @@ fold_builtin_memory_op (tree arglist, tree type, bool ignore, int endp) && !SCALAR_FLOAT_TYPE_P (TREE_TYPE (destvar))) return 0; + if (! var_decl_component_p (destvar)) + return 0; + srcvar = src; STRIP_NOPS (srcvar); if (TREE_CODE (srcvar) != ADDR_EXPR) @@ -8058,6 +8075,9 @@ fold_builtin_memory_op (tree arglist, tree type, bool ignore, int endp) && !SCALAR_FLOAT_TYPE_P (TREE_TYPE (srcvar))) return 0; + if (! var_decl_component_p (srcvar)) + return 0; + length = tree_low_cst (len, 1); if (GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (destvar))) != length || get_pointer_alignment (dest, BIGGEST_ALIGNMENT) / BITS_PER_UNIT |