Attempt to fix MIPS buildbots after r273425.

MIPS has a 'signext' attribute that was causing the check to fail.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@273552 91177308-0d34-0410-b5e6-96231b3b80d8

test/CodeGenOpenCL/kernel-attributes.cl

@@ -3,10 +3,10 @@
 typedef unsigned int uint4 __attribute__((ext_vector_type(4)));
 
 kernel  __attribute__((vec_type_hint(int))) __attribute__((reqd_work_group_size(1,2,4))) void kernel1(int a) {}
-// CHECK: define void @kernel1(i32 %a) {{[^{]+}} !vec_type_hint ![[MD1:[0-9]+]] !reqd_work_group_size ![[MD2:[0-9]+]]
+// CHECK: define void @kernel1(i32 {{[^%]*}}%a) {{[^{]+}} !vec_type_hint ![[MD1:[0-9]+]] !reqd_work_group_size ![[MD2:[0-9]+]]
 
 kernel __attribute__((vec_type_hint(uint4))) __attribute__((work_group_size_hint(8,16,32))) void kernel2(int a) {}
-// CHECK: define void @kernel2(i32 %a) {{[^{]+}} !vec_type_hint ![[MD3:[0-9]+]] !work_group_size_hint ![[MD4:[0-9]+]]
+// CHECK: define void @kernel2(i32 {{[^%]*}}%a) {{[^{]+}} !vec_type_hint ![[MD3:[0-9]+]] !work_group_size_hint ![[MD4:[0-9]+]]
 
 // CHECK: [[MD1]] = !{i32 undef, i32 1}
 // CHECK: [[MD2]] = !{i32 1, i32 2, i32 4}