[OPENMP] Enable c++ exceptions outside of the target constructs iff they are

enabled for the host.

If the compilation for the host enables C++ exceptions, but they are not
supported by the device, we still need to allow the code with the
exception handling constructs outside of the target regions.

llvm-svn: 331372

3 files changed, 11 insertions, 2 deletions

diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index a6dc1678d1d..ddaa16477aa 100644
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -2586,6 +2586,7 @@ static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
 
   // Set the flag to prevent the implementation from emitting device exception
   // handling code for those requiring so.
+  Opts.OpenMPHostCXXExceptions = Opts.Exceptions && Opts.CXXExceptions;
   if (Opts.OpenMPIsDevice && T.isNVPTX()) {
     Opts.Exceptions = 0;
     Opts.CXXExceptions = 0;
diff --git a/clang/lib/Sema/SemaExprCXX.cpp b/clang/lib/Sema/SemaExprCXX.cpp
index a24ae7a077e..95ea8418e1a 100644
--- a/clang/lib/Sema/SemaExprCXX.cpp
+++ b/clang/lib/Sema/SemaExprCXX.cpp
@@ -695,7 +695,11 @@ ExprResult Sema::BuildCXXThrow(SourceLocation OpLoc, Expr *Ex,
                                bool IsThrownVarInScope) {
   // Don't report an error if 'throw' is used in system headers.
   if (!getLangOpts().CXXExceptions &&
-      !getSourceManager().isInSystemHeader(OpLoc))
+      !getSourceManager().isInSystemHeader(OpLoc) &&
+      (!getLangOpts().OpenMPIsDevice ||
+       !getLangOpts().OpenMPHostCXXExceptions ||
+       isInOpenMPTargetExecutionDirective() ||
+       isInOpenMPDeclareTargetContext()))
     Diag(OpLoc, diag::err_exceptions_disabled) << "throw";
 
   // Exceptions aren't allowed in CUDA device code.
diff --git a/clang/lib/Sema/SemaStmt.cpp b/clang/lib/Sema/SemaStmt.cpp
index c3a627f1d36..d3224b75f45 100644
--- a/clang/lib/Sema/SemaStmt.cpp
+++ b/clang/lib/Sema/SemaStmt.cpp
@@ -3942,7 +3942,11 @@ StmtResult Sema::ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock,
                                   ArrayRef<Stmt *> Handlers) {
   // Don't report an error if 'try' is used in system headers.
   if (!getLangOpts().CXXExceptions &&
-      !getSourceManager().isInSystemHeader(TryLoc))
+      !getSourceManager().isInSystemHeader(TryLoc) &&
+      (!getLangOpts().OpenMPIsDevice ||
+       !getLangOpts().OpenMPHostCXXExceptions ||
+       isInOpenMPTargetExecutionDirective() ||
+       isInOpenMPDeclareTargetContext()))
     Diag(TryLoc, diag::err_exceptions_disabled) << "try";
 
   // Exceptions aren't allowed in CUDA device code.