[flang][OpenMP] Fix build with gcc 7.5.0

[kparzysz]

No description provided.

[llvmbot]

@llvm/pr-subscribers-flang-parser

Author: Krzysztof Parzyszek (kparzysz)

Changes

---

Full diff: https://github.com/llvm/llvm-project/pull/169184.diff

1 Files Affected:

• (modified) flang/lib/Parser/openmp-parsers.cpp (+1-1)

diff --git a/flang/lib/Parser/openmp-parsers.cpp b/flang/lib/Parser/openmp-parsers.cpp
index a0c94296de5ed..0652dac209dbb 100644
--- a/flang/lib/Parser/openmp-parsers.cpp
+++ b/flang/lib/Parser/openmp-parsers.cpp
@@ -71,7 +71,7 @@ template <typename ExecParser> struct AsBlockParser {
     if (auto &&exec{attempt(epc_).Parse(state)}) {
       Block body;
       body.push_back(std::move(*exec));
-      return body;
+      return std::move(body); // std::move for GCC 7.5.0
     }
     return std::nullopt;
   }