[OpenMP] [test] Don't use the compiler's omp.h in tasking/omp50_taskdep_depobj.c

When doing a all-in-one build of clang and openmp, this test
used the current omp.h, while if building openmp standalone,
it would use the compiler's omp.h, which only works correctly
if one already has installed a recent enough version of omp.h
into the compiler that was used.

Skip this discrepancy and just use the same headers as all other
tests.

Author: mstorsjo

openmp/runtime/test/lit.cfg

@@ -73,7 +73,6 @@ if config.target_arch == "s390x":
     flags += " -mbackchain"
 
 config.test_flags = " -I " + config.omp_header_directory + flags
-config.test_flags_use_compiler_omp_h = flags
 
 
 # extra libraries
@@ -210,16 +209,6 @@ config.substitutions.append(("%libomp-run", "%t"))
 config.substitutions.append(("%clangXX", config.test_cxx_compiler))
 config.substitutions.append(("%clang", config.test_c_compiler))
 config.substitutions.append(("%openmp_flags", config.test_openmp_flags))
-# %flags-use-compiler-omp-h allows us to use the test compiler's omp.h file which
-# may have different definitions of structures than our omp.h file.
-if config.is_standalone_build and config.test_compiler_has_omp_h:
-    config.substitutions.append(("%flags-use-compiler-omp-h",
-        config.test_flags_use_compiler_omp_h))
-else:
-    # If testing the runtime within an LLVM tree, then always include omp.h
-    # directory associated with the new clang compiler.
-    config.substitutions.append(("%flags-use-compiler-omp-h",
-        config.test_flags))
 config.substitutions.append(("%flags", config.test_flags))
 config.substitutions.append(("%python", '"%s"' % (sys.executable)))
 config.substitutions.append(("%not", config.test_not))

openmp/runtime/test/tasking/omp50_taskdep_depobj.c

@@ -1,4 +1,4 @@
-// RUN: %clang %openmp_flags %flags-use-compiler-omp-h %s -o %t && %libomp-run
+// RUN: %clang %openmp_flags %flags %s -o %t && %libomp-run
 // UNSUPPORTED: gcc-5, gcc-6, gcc-7, gcc-8
 // UNSUPPORTED: clang-5, clang-6, clang-7, clang-8, clang-9, clang-10
 // UNSUPPORTED: icc