diff options
| author | Jakub Jelinek <jakub@redhat.com> | 2016-11-04 20:14:07 +0100 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2016-11-04 20:14:07 +0100 |
| commit | 5f4cebba260db0f1b1edf45152be3bad2ed779a8 (patch) | |
| tree | 44171163f2384ac617137b2fbe9257ebe8efbebc /gcc/alias.c | |
| parent | 6e3ae7e6f5699430cdedd1ca2a7b5cfa020171aa (diff) | |
re PR target/77834 (ICE: in make_decl_rtl, at varasm.c:1311 with -O -ftree-pre -mstringop-strategy=libcall)
PR target/77834
* alias.c (nonoverlapping_memrefs_p): Return 0 if exprx or expry
doesn't have rtl set.
* gcc.dg/pr77834.c: New test.
From-SVN: r241859
Diffstat (limited to 'gcc/alias.c')
| -rw-r--r-- | gcc/alias.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/gcc/alias.c b/gcc/alias.c index ca475ff92af..fd3dec4d0e3 100644 --- a/gcc/alias.c +++ b/gcc/alias.c @@ -2755,6 +2755,13 @@ nonoverlapping_memrefs_p (const_rtx x, const_rtx y, bool loop_invariant) || TREE_CODE (expry) == CONST_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. */ + if ((!DECL_RTL_SET_P (exprx) && TREE_CODE (exprx) != FUNCTION_DECL) + || (!DECL_RTL_SET_P (expry) && TREE_CODE (expry) != FUNCTION_DECL)) + return 0; + rtlx = DECL_RTL (exprx); rtly = DECL_RTL (expry); |