Simplify nvptx/slp* test-cases

[Tom de Vries]

Hi,

this patch simplifies the nvtpx/slp* test-cases by using signed loop 
iteration variables, in order to work around PR81635.

Committed.

Thanks,
- Tom
Simplify nvptx/slp* test-cases

Use signed loop iteration variable in nvtpx/slp* test-cases to work around
PR tree-optimizaion/81635.

2017-08-01  Tom de Vries  <t...@codesourcery.com>

	* gcc.target/nvptx/slp-2.c (foo): Use signed loop iteration variable.
	* gcc.target/nvptx/slp.c (foo): Same.

---
 gcc/testsuite/gcc.target/nvptx/slp-2.c | 2 +-
 gcc/testsuite/gcc.target/nvptx/slp.c   | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/gcc/testsuite/gcc.target/nvptx/slp-2.c b/gcc/testsuite/gcc.target/nvptx/slp-2.c
index 6639491..1821999 100644
--- a/gcc/testsuite/gcc.target/nvptx/slp-2.c
+++ b/gcc/testsuite/gcc.target/nvptx/slp-2.c
@@ -9,7 +9,7 @@ foo ()
 {
   long long int a, b;
 
-  unsigned int i;
+  int i;
   for (i = 0; i < 1000; i += 2)
     {
       a = p[i];
diff --git a/gcc/testsuite/gcc.target/nvptx/slp.c b/gcc/testsuite/gcc.target/nvptx/slp.c
index 5dee147..ca8191c 100644
--- a/gcc/testsuite/gcc.target/nvptx/slp.c
+++ b/gcc/testsuite/gcc.target/nvptx/slp.c
@@ -9,7 +9,7 @@ foo ()
 {
   int a, b;
 
-  unsigned int i;
+  int i;
   for (i = 0; i < 1000; i += 2)
     {
       a = p[i];