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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): If one decl is
	FUNCTION_DECL or LABEL_DECL and the other is not, return 1.

From-SVN: r241905
This commit is contained in:
Jakub Jelinek 2016-11-07 14:33:37 +01:00 committed by Jakub Jelinek
parent a98152285e
commit dca167984a
2 changed files with 15 additions and 1 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2016-11-07 Jakub Jelinek <jakub@redhat.com>
PR target/77834
* alias.c (nonoverlapping_memrefs_p): If one decl is
FUNCTION_DECL or LABEL_DECL and the other is not, return 1.
2016-11-07 Richard Biener <rguenther@suse.de>
PR target/78229

10
gcc/alias.c
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@ -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