[Clang] Don't match irrelevant attributes in mips return tests (NFC)

The only thing these tests care about from an ABI perspective is sret,
don't also test all the optimization attributes.

Author: nikic

clang/test/CodeGen/mips-vector-return.c

@@ -8,14 +8,14 @@ typedef float  v4sf __attribute__ ((__vector_size__ (16)));
 typedef double v4df __attribute__ ((__vector_size__ (32)));
 typedef int v4i32 __attribute__ ((__vector_size__ (16)));
 
-// O32-LABEL: define{{.*}} void @test_v4sf(ptr dead_on_unwind noalias nocapture writable writeonly sret
+// O32-LABEL: define{{.*}} void @test_v4sf(ptr {{.*}} sret
 // N64: define{{.*}} inreg { i64, i64 } @test_v4sf
 v4sf test_v4sf(float a) {
   return (v4sf){0.0f, a, 0.0f, 0.0f};
 }
 
-// O32-LABEL: define{{.*}} void @test_v4df(ptr dead_on_unwind noalias nocapture writable writeonly sret
-// N64-LABEL: define{{.*}} void @test_v4df(ptr dead_on_unwind noalias nocapture writable writeonly sret
+// O32-LABEL: define{{.*}} void @test_v4df(ptr {{.*}} sret
+// N64-LABEL: define{{.*}} void @test_v4df(ptr {{.*}} sret
 v4df test_v4df(double a) {
   return (v4df){0.0, a, 0.0, 0.0};
 }

clang/test/CodeGen/mips64-nontrivial-return.cpp

@@ -10,7 +10,7 @@ class D : public B {
 
 extern D gd0;
 
-// CHECK: _Z4foo1v(ptr dead_on_unwind noalias nocapture writable writeonly sret
+// CHECK: _Z4foo1v(ptr {{.*}} sret
 
 D foo1(void) {
   return gd0;