diff options
Diffstat (limited to 'gcc/alias.c')
| -rw-r--r-- | gcc/alias.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/gcc/alias.c b/gcc/alias.c index fd3dec4..1ea2417 100644 --- a/gcc/alias.c +++ b/gcc/alias.c @@ -2755,6 +2755,14 @@ nonoverlapping_memrefs_p (const_rtx x, const_rtx y, bool loop_invariant) || TREE_CODE (expry) == CONST_DECL) return 1; + /* If one decl is known to be a function or label in a function and + the other is some kind of data, they can't overlap. */ + if ((TREE_CODE (exprx) == FUNCTION_DECL + || TREE_CODE (exprx) == LABEL_DECL) + != (TREE_CODE (expry) == FUNCTION_DECL + || TREE_CODE (expry) == LABEL_DECL)) + return 1; + /* If either of the decls doesn't have DECL_RTL set (e.g. marked as living in multiple places), we can't tell anything. Exception are FUNCTION_DECLs for which we can create DECL_RTL on demand. */ @@ -2804,7 +2812,7 @@ nonoverlapping_memrefs_p (const_rtx x, const_rtx y, bool loop_invariant) /* Offset based disambiguation not appropriate for loop invariant */ if (loop_invariant) - return 0; + return 0; /* Offset based disambiguation is OK even if we do not know that the declarations are necessarily different |