diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index fb4a27b3ce5b..e2dda1120ff8 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2010-12-07  Richard Guenther  <rguenther@suse.de>
+
+	PR tree-optimization/46832
+	* tree-ssa-math-opts.c (execute_optimize_widening_mul): Check
+	that the call has a lhs.
+
 2010-12-07  Yao Qi  <yao@codesourcery.com>
 
 	* Makefile.in: Add $(TARGET_H) to the regrename.o rule.
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index c77146d7f60b..3ff9cd8dcf06 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2010-12-07  Richard Guenther  <rguenther@suse.de>
+
+	PR tree-optimization/46832
+	* gcc.c-torture/compile/pr46832.c: New testcase.
+
 2010-12-07  Jakub Jelinek  <jakub@redhat.com>
 
 	PR debug/46799
diff --git a/gcc/testsuite/gcc.c-torture/compile/pr46832.c b/gcc/testsuite/gcc.c-torture/compile/pr46832.c
new file mode 100644
index 000000000000..f500aa510680
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/compile/pr46832.c
@@ -0,0 +1,4 @@
+double pow(double x, double y);
+void foo( double x ) {
+   int j = (int) ((pow(x, 2)) < 0.0 ? (pow(x, 2))-0.5 : (pow(x, 2))+0.5);
+}
diff --git a/gcc/tree-ssa-math-opts.c b/gcc/tree-ssa-math-opts.c
index e8f90372bc1a..ed9b7a9d5467 100644
--- a/gcc/tree-ssa-math-opts.c
+++ b/gcc/tree-ssa-math-opts.c
@@ -1707,7 +1707,8 @@ execute_optimize_widening_mul (void)
 		default:;
 		}
 	    }
-	  else if (is_gimple_call (stmt))
+	  else if (is_gimple_call (stmt)
+		   && gimple_call_lhs (stmt))
 	    {
 	      tree fndecl = gimple_call_fndecl (stmt);
 	      if (fndecl