[all-commits] [llvm/llvm-project] cbf64b: [OpenMP] Fix map clause for unused var: don't igno...

[Joel E. Denny via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: cbf64b58345dd9c1f0032c4fce558ed2f1fd0fe4
      https://github.com/llvm/llvm-project/commit/cbf64b58345dd9c1f0032c4fce558ed2f1fd0fe4
  Author: Joel E. Denny <jdenny.ornl at gmail.com>
  Date:   2020-07-17 (Fri, 17 Jul 2020)

  Changed paths:
    M clang/lib/CodeGen/CGOpenMPRuntime.cpp
    M clang/test/OpenMP/target_map_codegen.cpp
    M clang/test/OpenMP/target_teams_map_codegen.cpp

  Log Message:
  -----------
  [OpenMP] Fix map clause for unused var: don't ignore it

For example, without this patch:

```
 $ cat test.c
 int main() {
   int x[3];
   #pragma omp target map(tofrom:x[0:3])
 #ifdef USE
   x[0] = 1
 #endif
   ;
   return 0;
 }
 $ clang -fopenmp -fopenmp-targets=nvptx64-nvidia-cuda -S -emit-llvm test.c
 $ grep '^@.offload_maptypes' test.ll
 $ echo $?
 1
 $ clang -fopenmp -fopenmp-targets=nvptx64-nvidia-cuda -S -emit-llvm test.c \
         -DUSE
 $ grep '^@.offload_maptypes' test.ll
 @.offload_maptypes = private unnamed_addr constant [1 x i64] [i64 35]
```

With this patch, both greps produce the same result.

Reviewed By: ABataev

Differential Revision: https://reviews.llvm.org/D83922