[AMDGPU] Null checking on TS to avoid crashing in clang tests.

- `test/Misc/backend-resource-limit-diagnostics.cl` crashes as null
  streamer is used.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@364318 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/AMDGPU/AMDGPUAsmPrinter.cpp b/lib/Target/AMDGPU/AMDGPUAsmPrinter.cpp
index bad5670010aacd54cd5f8f43de1a334bccee4b30..cf1ed349302049e4ce13c22bdbef6ceddae804c8 100644 (file)
--- a/lib/Target/AMDGPU/AMDGPUAsmPrinter.cpp
+++ b/lib/Target/AMDGPU/AMDGPUAsmPrinter.cpp
@@ -326,7 +326,8 @@ void AMDGPUAsmPrinter::EmitGlobalVariable(const GlobalVariable *GV) {
 
     EmitVisibility(GVSym, GV->getVisibility(), !GV->isDeclaration());
     EmitLinkage(GV, GVSym);
-    getTargetStreamer()->emitAMDGPULDS(GVSym, Size, Align);
+    if (auto TS = getTargetStreamer())
+      TS->emitAMDGPULDS(GVSym, Size, Align);
     return;
   }