diff options
Diffstat (limited to 'gcc/explow.c')
| -rw-r--r-- | gcc/explow.c | 28 |
1 files changed, 21 insertions, 7 deletions
diff --git a/gcc/explow.c b/gcc/explow.c index 7a770ee897c..97435a703b9 100644 --- a/gcc/explow.c +++ b/gcc/explow.c @@ -34,6 +34,7 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA #include "insn-config.h" #include "ggc.h" #include "recog.h" +#include "langhooks.h" static rtx break_out_memory_refs PARAMS ((rtx)); static void emit_stack_probe PARAMS ((rtx)); @@ -285,20 +286,33 @@ rtx expr_size (exp) tree exp; { - tree size; - - if (TREE_CODE_CLASS (TREE_CODE (exp)) == 'd' - && DECL_SIZE_UNIT (exp) != 0) - size = DECL_SIZE_UNIT (exp); - else - size = size_in_bytes (TREE_TYPE (exp)); + tree size = (*lang_hooks.expr_size) (exp); if (TREE_CODE (size) != INTEGER_CST && contains_placeholder_p (size)) size = build (WITH_RECORD_EXPR, sizetype, size, exp); return expand_expr (size, NULL_RTX, TYPE_MODE (sizetype), 0); +} + +/* Return a wide integer for the size in bytes of the value of EXP, or -1 + if the size can vary or is larger than an integer. */ + +HOST_WIDE_INT +int_expr_size (exp) + tree exp; +{ + tree t = (*lang_hooks.expr_size) (exp); + + if (t == 0 + || TREE_CODE (t) != INTEGER_CST + || TREE_OVERFLOW (t) + || TREE_INT_CST_HIGH (t) != 0 + /* If the result would appear negative, it's too big to represent. */ + || (HOST_WIDE_INT) TREE_INT_CST_LOW (t) < 0) + return -1; + return TREE_INT_CST_LOW (t); } /* Return a copy of X in which all memory references |