From: Martin Liska <mliska@suse.cz>
Date: Thu, 27 Jun 2019 09:41:34 +0000 (+0200)
Subject: Fix ICE when __builtin_calloc has no LHS (PR tree-optimization/91014).
X-Git-Tag: upstream/12.2.0~23660
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=4c4be718fb65f9b8dd06d83c6fa3f697a5369d52;p=platform%2Fupstream%2Fgcc.git

Fix ICE when __builtin_calloc has no LHS (PR tree-optimization/91014).

2019-06-27  Martin Liska  <mliska@suse.cz>

	PR tree-optimization/91014
	* tree-ssa-dse.c (initialize_ao_ref_for_dse): Bail out
	when LHS is NULL_TREE.
2019-06-27  Martin Liska  <mliska@suse.cz>

	PR tree-optimization/91014
	* gcc.target/s390/pr91014.c: New test.

From-SVN: r272738
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 16d26bd..a1bd798 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,11 @@
 2019-06-27  Martin Liska  <mliska@suse.cz>
 
+	PR tree-optimization/91014
+	* tree-ssa-dse.c (initialize_ao_ref_for_dse): Bail out
+	when LHS is NULL_TREE.
+
+2019-06-27  Martin Liska  <mliska@suse.cz>
+
 	* symbol-summary.h (traverse): Pass
 	argument a to the call of callback.
 	(gt_ggc_mx): Mark arguments as unused.
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index f7b774a..c48ceef 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2019-06-27  Martin Liska  <mliska@suse.cz>
+
+	PR tree-optimization/91014
+	* gcc.target/s390/pr91014.c: New test.
+
 2019-06-27  Richard Biener  <rguenther@suse.de>
 
 	PR testsuite/91004
diff --git a/gcc/testsuite/gcc.target/s390/pr91014.c b/gcc/testsuite/gcc.target/s390/pr91014.c
new file mode 100644
index 0000000..eb37b33
--- /dev/null
+++ b/gcc/testsuite/gcc.target/s390/pr91014.c
@@ -0,0 +1,8 @@
+/* { dg-do compile } */
+/* { dg-options "-O" } */
+/* { dg-require-effective-target alloca } */
+
+void foo(void)
+{
+ __builtin_calloc (1, 1); /* { dg-warning "ignoring return value of '__builtin_calloc' declared with attribute 'warn_unused_result'" } */
+}
diff --git a/gcc/tree-ssa-dse.c b/gcc/tree-ssa-dse.c
index 1b1a9f3..df05a55 100644
--- a/gcc/tree-ssa-dse.c
+++ b/gcc/tree-ssa-dse.c
@@ -129,10 +129,11 @@ initialize_ao_ref_for_dse (gimple *stmt, ao_ref *write)
 	    {
 	      tree nelem = gimple_call_arg (stmt, 0);
 	      tree selem = gimple_call_arg (stmt, 1);
+	      tree lhs;
 	      if (TREE_CODE (nelem) == INTEGER_CST
-		  && TREE_CODE (selem) == INTEGER_CST)
+		  && TREE_CODE (selem) == INTEGER_CST
+		  && (lhs = gimple_call_lhs (stmt)) != NULL_TREE)
 		{
-		  tree lhs = gimple_call_lhs (stmt);
 		  tree size = fold_build2 (MULT_EXPR, TREE_TYPE (nelem),
 					   nelem, selem);
 		  ao_ref_init_from_ptr_and_size (write, lhs, size);