[CUDA] Disable LTO for device-side compilations.
This fixes host-side LTO during CUDA compilation. Before, LTO
pipeline construction was clashing with CUDA pipeline construction.
At the moment there's no point doing LTO on device side as each
device-side TU is a complete program. We will need to figure out
compilation pipeline construction for the device-side LTO when we
have working support for multi-TU device-side CUDA compilation.
Differential Revision: https://reviews.llvm.org/D44691
llvm-svn: 328161
diff --git a/clang/lib/Driver/Driver.cpp b/clang/lib/Driver/Driver.cpp
index 4712daf..ad65f6f 100644
--- a/clang/lib/Driver/Driver.cpp
+++ b/clang/lib/Driver/Driver.cpp
@@ -2171,7 +2171,7 @@
break;
CudaDeviceActions[I] = C.getDriver().ConstructPhaseAction(
- C, Args, Ph, CudaDeviceActions[I]);
+ C, Args, Ph, CudaDeviceActions[I], Action::OFK_Cuda);
if (Ph == phases::Assemble)
break;
@@ -3011,8 +3011,9 @@
Args.ClaimAllArgs(options::OPT_cuda_compile_host_device);
}
-Action *Driver::ConstructPhaseAction(Compilation &C, const ArgList &Args,
- phases::ID Phase, Action *Input) const {
+Action *Driver::ConstructPhaseAction(
+ Compilation &C, const ArgList &Args, phases::ID Phase, Action *Input,
+ Action::OffloadKind TargetDeviceOffloadKind) const {
llvm::PrettyStackTraceString CrashInfo("Constructing phase actions");
// Some types skip the assembler phase (e.g., llvm-bc), but we can't
@@ -3074,7 +3075,7 @@
return C.MakeAction<CompileJobAction>(Input, types::TY_LLVM_BC);
}
case phases::Backend: {
- if (isUsingLTO()) {
+ if (isUsingLTO() && TargetDeviceOffloadKind == Action::OFK_None) {
types::ID Output =
Args.hasArg(options::OPT_S) ? types::TY_LTO_IR : types::TY_LTO_BC;
return C.MakeAction<BackendJobAction>(Input, Output);