diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 72efc3fbbbf..ba13b88f70a 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,10 @@
+2018-01-24  Michael Meissner  <meissner@linux.vnet.ibm.com>
+
+	PR target/81550
+	* gcc.target/powerpc/loop_align.c: Use unsigned long for the loop
+	index instead of int, which allows IVOPTs to properly optimize the
+	loop.
+
 2018-01-24  David Malcolm  <dmalcolm@redhat.com>
 
 	PR jit/82846
diff --git a/gcc/testsuite/gcc.target/powerpc/loop_align.c b/gcc/testsuite/gcc.target/powerpc/loop_align.c
index 670fdc0d8b9..7eabc118217 100644
--- a/gcc/testsuite/gcc.target/powerpc/loop_align.c
+++ b/gcc/testsuite/gcc.target/powerpc/loop_align.c
@@ -4,8 +4,8 @@
 /* { dg-options "-O2 -mcpu=power7 -falign-functions=16" } */
 /* { dg-final { scan-assembler ".p2align 5,,31" } } */
 
-void f(double *a, double *b, double *c, int n) {
-  int i;
+void f(double *a, double *b, double *c, unsigned long n) {
+  unsigned long i;
   for (i=0; i < n; i++)
     a[i] = b[i] + c[i];
 }