1 files changed, 99 insertions, 0 deletions
diff --git a/test/CodeGen/pragma-unroll.cpp b/test/CodeGen/pragma-unroll.cpp
new file mode 100644
index 0000000000..b321e74a11
--- /dev/null
+++ b/test/CodeGen/pragma-unroll.cpp
@@ -0,0 +1,99 @@
+// RUN: %clang_cc1 -triple x86_64-apple-darwin -std=c++11 -emit-llvm -o - %s | FileCheck %s
+
+// Verify while loop is recognized after unroll pragma.
+void while_test(int *List, int Length) {
+  // CHECK: define {{.*}} @_Z10while_test
+  int i = 0;
+
+#pragma unroll
+  while (i < Length) {
+    // CHECK: br i1 {{.*}}, label {{.*}}, label {{.*}}, !llvm.loop ![[LOOP_1:.*]]
+    List[i] = i * 2;
+    i++;
+  }
+}
+
+// Verify do loop is recognized after multi-option pragma clang loop directive.
+void do_test(int *List, int Length) {
+  int i = 0;
+
+#pragma unroll 16
+  do {
+    // CHECK: br i1 {{.*}}, label {{.*}}, label {{.*}}, !llvm.loop ![[LOOP_2:.*]]
+    List[i] = i * 2;
+    i++;
+  } while (i < Length);
+}
+
+// Verify for loop is recognized after unroll pragma.
+void for_test(int *List, int Length) {
+#pragma unroll 8
+  for (int i = 0; i < Length; i++) {
+    // CHECK: br i1 {{.*}}, label {{.*}}, label {{.*}}, !llvm.loop ![[LOOP_3:.*]]
+    List[i] = i * 2;
+  }
+}
+
+// Verify c++11 for range loop is recognized after unroll pragma.
+void for_range_test() {
+  double List[100];
+
+#pragma unroll(4)
+  for (int i : List) {
+    // CHECK: br i1 {{.*}}, label {{.*}}, label {{.*}}, !llvm.loop ![[LOOP_4:.*]]
+    List[i] = i;
+  }
+}
+
+#define UNROLLCOUNT 8
+
+// Verify defines are correctly resolved in unroll pragmas.
+void for_define_test(int *List, int Length, int Value) {
+#pragma unroll(UNROLLCOUNT)
+  for (int i = 0; i < Length; i++) {
+    // CHECK: br i1 {{.*}}, label {{.*}}, label {{.*}}, !llvm.loop ![[LOOP_5:.*]]
+    List[i] = i * Value;
+  }
+}
+
+// Verify metadata is generated when template is used.
+template <typename A>
+void for_template_test(A *List, int Length, A Value) {
+#pragma unroll 8
+  for (int i = 0; i < Length; i++) {
+    // CHECK: br i1 {{.*}}, label {{.*}}, label {{.*}}, !llvm.loop ![[LOOP_6:.*]]
+    List[i] = i * Value;
+  }
+}
+
+// Verify define is resolved correctly when template is used.
+template <typename A>
+void for_template_define_test(A *List, int Length, A Value) {
+#pragma unroll(UNROLLCOUNT)
+  for (int i = 0; i < Length; i++) {
+    // CHECK: br i1 {{.*}}, label {{.*}}, label {{.*}}, !llvm.loop ![[LOOP_7:.*]]
+    List[i] = i * Value;
+  }
+}
+
+#undef UNROLLCOUNT
+
+// Use templates defined above. Test verifies metadata is generated correctly.
+void template_test(double *List, int Length) {
+  double Value = 10;
+
+  for_template_test<double>(List, Length, Value);
+  for_template_define_test<double>(List, Length, Value);
+}
+
+// CHECK: ![[LOOP_1]] = metadata !{metadata ![[LOOP_1]], metadata ![[UNROLLENABLE_1:.*]]}
+// CHECK: ![[UNROLLENABLE_1]] = metadata !{metadata !"llvm.loop.unroll.enable", i1 true}
+// CHECK: ![[LOOP_2]] = metadata !{metadata ![[LOOP_2:.*]], metadata ![[UNROLL_16:.*]]}
+// CHECK: ![[UNROLL_16]] = metadata !{metadata !"llvm.loop.unroll.count", i32 16}
+// CHECK: ![[LOOP_3]] = metadata !{metadata ![[LOOP_3]], metadata ![[UNROLL_8:.*]]}
+// CHECK: ![[UNROLL_8]] = metadata !{metadata !"llvm.loop.unroll.count", i32 8}
+// CHECK: ![[LOOP_4]] = metadata !{metadata ![[LOOP_4]], metadata ![[UNROLL_4:.*]]}
+// CHECK: ![[UNROLL_4]] = metadata !{metadata !"llvm.loop.unroll.count", i32 4}
+// CHECK: ![[LOOP_5]] = metadata !{metadata ![[LOOP_5]], metadata ![[UNROLL_8:.*]]}
+// CHECK: ![[LOOP_6]] = metadata !{metadata ![[LOOP_6]], metadata ![[UNROLL_8:.*]]}
+// CHECK: ![[LOOP_7]] = metadata !{metadata ![[LOOP_7]], metadata ![[UNROLL_8:.*]]}