From: Jakub Jelinek <jakub@redhat.com>
Date: Tue, 17 Apr 2018 21:38:45 +0000 (+0200)
Subject: re PR rtl-optimization/85431 (UBSAN: ../../gcc/dse.c:303:15: runtime error: shift... 
X-Git-Tag: basepoints/gcc-9~100
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cbe679a486d11b1d959042732a9ddc204afbb661;p=thirdparty%2Fgcc.git

re PR rtl-optimization/85431 (UBSAN: ../../gcc/dse.c:303:15: runtime error: shift exponent 64 is too large for 64-bit type 'long unsigned int')

	PR rtl-optimization/85431
	* dse.c (record_store): Ignore zero width stores.

From-SVN: r259448
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index cce4d3ddb9b7..1fba2d92215d 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,8 @@
 2018-04-17  Jakub Jelinek  <jakub@redhat.com>
 
+	PR rtl-optimization/85431
+	* dse.c (record_store): Ignore zero width stores.
+
 	PR sanitizer/85230
 	* asan.c (handle_builtin_stack_restore): Adjust comment.  Emit
 	__asan_allocas_unpoison call and last_alloca_addr = new_sp before
diff --git a/gcc/dse.c b/gcc/dse.c
index 1ef8f642719f..26c6007b9ed8 100644
--- a/gcc/dse.c
+++ b/gcc/dse.c
@@ -1417,6 +1417,9 @@ record_store (rtx body, bb_info_t bb_info)
       return 0;
     }
 
+  if (known_eq (width, 0))
+    return 0;
+
   if (group_id >= 0)
     {
       /* In the restrictive case where the base is a constant or the