Merge branch 'master' of ssh://bitbucket.org/czan/honours

1 files changed, 47 insertions, 0 deletions

diff --git a/clang/test/CodeGen/builtin-expect.c b/clang/test/CodeGen/builtin-expect.c
new file mode 100644
index 0000000..664c6b6
--- /dev/null
+++ b/clang/test/CodeGen/builtin-expect.c
@@ -0,0 +1,47 @@
+// RUN: %clang_cc1 -triple x86_64-unknown-unknown -emit-llvm -o - %s | FileCheck %s
+
+int x;
+int y(void);
+void foo();
+void FUNC() {
+// CHECK: [[call:%.*]] = call i32 @y
+  if (__builtin_expect (x, y()))
+    foo ();
+}
+
+// rdar://9330105
+void isigprocmask(void);
+long bar();
+
+int main() {
+    (void) __builtin_expect((isigprocmask(), 0), bar());
+}
+
+// CHECK: call void @isigprocmask()
+// CHECK: [[C:%.*]] = call i64 (...)* @bar()
+
+
+// CHECK: @test1
+int test1(int x) {
+// CHECK: @llvm.expect
+  if (__builtin_expect (x, 1))
+    return 0;
+  return x;
+}
+
+// CHECK: @test2
+int test2(int x) {
+// CHECK: @llvm.expect
+  switch(__builtin_expect(x, 5)) {
+  default:
+    return 0;
+  case 0:
+  case 1:
+  case 2:
+    return 1;
+  case 5:
+    return 5;
+  };
+
+  return 0;
+}