[OPENMP 4.0] Support for 'uniform' clause in 'declare simd' directive.

OpenMP 4.0 defines clause 'uniform' in 'declare simd' directive:
'uniform' '(' <argument-list> ')'
The uniform clause declares one or more arguments to have an invariant value for all concurrent invocations of the function in the execution of a single SIMD loop.
The special this pointer can be used as if was one of the arguments to the function in any of the linear, aligned, or uniform clauses.

llvm-svn: 266041
diff --git a/clang/test/OpenMP/declare_simd_ast_print.c b/clang/test/OpenMP/declare_simd_ast_print.c
index 49dd102..fe6bffc 100644
--- a/clang/test/OpenMP/declare_simd_ast_print.c
+++ b/clang/test/OpenMP/declare_simd_ast_print.c
@@ -8,12 +8,12 @@
 
 #pragma omp declare simd
 #pragma omp declare simd simdlen(32)
-#pragma omp declare simd inbranch
-#pragma omp declare simd notinbranch simdlen(2)
+#pragma omp declare simd inbranch, uniform(d)
+#pragma omp declare simd notinbranch simdlen(2), uniform(s1, s2)
 void add_1(float *d, float *s1, float *s2) __attribute__((cold));
 
-// CHECK: #pragma omp declare simd notinbranch simdlen(2)
-// CHECK-NEXT: #pragma omp declare simd inbranch
+// CHECK: #pragma omp declare simd notinbranch simdlen(2) uniform(s1, s2)
+// CHECK-NEXT: #pragma omp declare simd inbranch uniform(d)
 // CHECK-NEXT: #pragma omp declare simd simdlen(32)
 // CHECK-NEXT: #pragma omp declare simd
 // CHECK-NEXT: void add_1(float *d, float *s1, float *s2) __attribute__((cold))
diff --git a/clang/test/OpenMP/declare_simd_ast_print.cpp b/clang/test/OpenMP/declare_simd_ast_print.cpp
index 5adbb95..e38ebe9 100644
--- a/clang/test/OpenMP/declare_simd_ast_print.cpp
+++ b/clang/test/OpenMP/declare_simd_ast_print.cpp
@@ -48,11 +48,11 @@
 }
 
 class VV {
-  // CHECK: #pragma omp declare simd
+  // CHECK: #pragma omp declare simd uniform(this, a)
   // CHECK-NEXT: int add(int a, int b) __attribute__((cold))    {
   // CHECK-NEXT: return a + b;
   // CHECK-NEXT: }
-  #pragma omp declare simd
+  #pragma omp declare simd uniform(this, a)
   int add(int a, int b) __attribute__((cold)) { return a + b; }
 
   // CHECK: #pragma omp declare simd
@@ -109,10 +109,10 @@
 // CHECK-NEXT: }
 
   #pragma omp declare simd
-  #pragma omp declare simd
+  #pragma omp declare simd uniform(this, b)
   int tadd(int b) { return x[b] + b; }
 
-// CHECK: #pragma omp declare simd
+// CHECK: #pragma omp declare simd uniform(this, b)
 // CHECK-NEXT: #pragma omp declare simd
 // CHECK-NEXT: int tadd(int b) {
 // CHECK-NEXT: return this->x[b] + b;
diff --git a/clang/test/OpenMP/declare_simd_messages.cpp b/clang/test/OpenMP/declare_simd_messages.cpp
index b222388..70737ad 100644
--- a/clang/test/OpenMP/declare_simd_messages.cpp
+++ b/clang/test/OpenMP/declare_simd_messages.cpp
@@ -75,8 +75,10 @@
 #pragma omp declare simd simdlen() simdlen)
 void foo();
 
+// expected-error@+3 2 {{expected reference to one of the parameters of function 'foo'}}
+// expected-error@+2 {{invalid use of 'this' outside of a non-static member function}}
 // expected-error@+1 {{argument to 'simdlen' clause must be a strictly positive integer value}}
-#pragma omp declare simd simdlen(N)
+#pragma omp declare simd simdlen(N) uniform(this, var)
 template<int N>
 void foo() {}
 
@@ -85,12 +87,34 @@
   foo<-3>();
 }
 
+// expected-error@+1 {{expected '(' after 'uniform'}}
+#pragma omp declare simd uniform
+// expected-note@+3 {{to match this '('}}
+// expected-error@+2 {{expected ')'}}
+// expected-error@+1 {{expected expression}}
+#pragma omp declare simd uniform(
+// expected-error@+1 {{expected expression}}
+#pragma omp declare simd uniform()
+// expected-note@+3 {{to match this '('}}
+// expected-error@+2 {{expected ')'}}
+// expected-error@+1 {{invalid use of 'this' outside of a non-static member function}}
+#pragma omp declare simd uniform(this
+// expected-note@+3 {{to match this '('}}
+// expected-error@+2 {{expected ')'}}
+// expected-error@+1 {{invalid use of 'this' outside of a non-static member function}}
+#pragma omp declare simd uniform(this,a
+// expected-error@+1 {{expected expression}}
+#pragma omp declare simd uniform(,a)
+void bar(int a);
+
 template <class T>
 struct St {
 // expected-error@+2 {{function declaration is expected after 'declare simd' directive}}
 #pragma init_seg(compiler)
 #pragma omp declare simd
 #pragma init_seg(compiler)
+// expected-error@+1 {{use of undeclared identifier 't'}}
+#pragma omp declare simd uniform(this, t)
   void h(T *hp) {
 // expected-error@+1 {{unexpected OpenMP directive '#pragma omp declare simd'}}
 #pragma omp declare simd