clang/test/PCH/no-escaping-block-tail-calls.cpp

   1 // RUN: %clang_cc1 -x c++-header -triple x86_64-apple-darwin11 -emit-pch -O2 -fblocks -fno-escaping-block-tail-calls -o %t %S/no-escaping-block-tail-calls.h
   2 // RUN: %clang_cc1 -triple x86_64-apple-darwin11 -include-pch %t -emit-llvm -O2 -fblocks -fno-escaping-block-tail-calls -o - %s | FileCheck %s
   3
   4 // Check that -fno-escaping-block-tail-calls doesn't disable tail-call
   5 // optimization if the block is non-escaping.
   6
   7 // CHECK-LABEL: define internal noundef i32 @___ZN1S1mEv_block_invoke(
   8 // CHECK: %[[CALL:.*]] = tail call noundef i32 @_ZN1S3fooER2S0(
   9 // CHECK-NEXT: ret i32 %[[CALL]]
  10
  11 void test() {
  12   S s;
  13   s.m();
  14 }