diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
--- a/clang/docs/ReleaseNotes.rst
+++ b/clang/docs/ReleaseNotes.rst
@@ -158,7 +158,7 @@
 CUDA Language Changes in Clang
 ------------------------------
 
-- Clang now supports CUDA versions up to 11.4.
+- Clang now supports CUDA versions up to 11.5.
 - Default GPU architecture has been changed from sm_20 to sm_35.
 
 Objective-C Language Changes in Clang
diff --git a/clang/include/clang/Basic/BuiltinsNVPTX.def b/clang/include/clang/Basic/BuiltinsNVPTX.def
--- a/clang/include/clang/Basic/BuiltinsNVPTX.def
+++ b/clang/include/clang/Basic/BuiltinsNVPTX.def
@@ -41,7 +41,9 @@
 #pragma push_macro("PTX72")
 #pragma push_macro("PTX73")
 #pragma push_macro("PTX74")
-#define PTX74 "ptx74"
+#pragma push_macro("PTX75")
+#define PTX75 "ptx75"
+#define PTX74 "ptx74|" PTX75
 #define PTX73 "ptx73|" PTX74
 #define PTX72 "ptx72|" PTX73
 #define PTX71 "ptx71|" PTX72
@@ -827,3 +829,4 @@
 #pragma pop_macro("PTX72")
 #pragma pop_macro("PTX73")
 #pragma pop_macro("PTX74")
+#pragma pop_macro("PTX75")
diff --git a/clang/include/clang/Basic/Cuda.h b/clang/include/clang/Basic/Cuda.h
--- a/clang/include/clang/Basic/Cuda.h
+++ b/clang/include/clang/Basic/Cuda.h
@@ -33,9 +33,10 @@
   CUDA_112,
   CUDA_113,
   CUDA_114,
-  FULLY_SUPPORTED = CUDA_114,
+  CUDA_115,
+  FULLY_SUPPORTED = CUDA_115,
   PARTIALLY_SUPPORTED =
-      CUDA_114, // Partially supported. Proceed with a warning.
+      CUDA_115, // Partially supported. Proceed with a warning.
   NEW = 10000,  // Too new. Issue a warning, but allow using it.
 };
 const char *CudaVersionToString(CudaVersion V);
diff --git a/clang/lib/Basic/Cuda.cpp b/clang/lib/Basic/Cuda.cpp
--- a/clang/lib/Basic/Cuda.cpp
+++ b/clang/lib/Basic/Cuda.cpp
@@ -40,6 +40,8 @@
     return "11.3";
   case CudaVersion::CUDA_114:
     return "11.4";
+  case CudaVersion::CUDA_115:
+    return "11.5";
   case CudaVersion::NEW:
     return "";
   }
@@ -62,6 +64,7 @@
       .Case("11.2", CudaVersion::CUDA_112)
       .Case("11.3", CudaVersion::CUDA_113)
       .Case("11.4", CudaVersion::CUDA_114)
+      .Case("11.5", CudaVersion::CUDA_115)
       .Default(CudaVersion::UNKNOWN);
 }
 
@@ -241,6 +244,8 @@
     return CudaVersion::CUDA_113;
   case 114:
     return CudaVersion::CUDA_114;
+  case 115:
+    return CudaVersion::CUDA_115;
   default:
     return CudaVersion::UNKNOWN;
   }
diff --git a/clang/lib/Basic/Targets/NVPTX.cpp b/clang/lib/Basic/Targets/NVPTX.cpp
--- a/clang/lib/Basic/Targets/NVPTX.cpp
+++ b/clang/lib/Basic/Targets/NVPTX.cpp
@@ -44,6 +44,7 @@
     if (!Feature.startswith("+ptx"))
       continue;
     PTXVersion = llvm::StringSwitch<unsigned>(Feature)
+                     .Case("+ptx75", 75)
                      .Case("+ptx74", 74)
                      .Case("+ptx73", 73)
                      .Case("+ptx72", 72)
diff --git a/clang/lib/Driver/ToolChains/Cuda.cpp b/clang/lib/Driver/ToolChains/Cuda.cpp
--- a/clang/lib/Driver/ToolChains/Cuda.cpp
+++ b/clang/lib/Driver/ToolChains/Cuda.cpp
@@ -65,6 +65,8 @@
     return CudaVersion::CUDA_113;
   if (raw_version < 11050)
     return CudaVersion::CUDA_114;
+  if (raw_version < 11060)
+    return CudaVersion::CUDA_115;
   return CudaVersion::NEW;
 }
 
@@ -707,6 +709,7 @@
   case CudaVersion::CUDA_##CUDA_VER:                                           \
     PtxFeature = "+ptx" #PTX_VER;                                              \
     break;
+    CASE_CUDA_VERSION(115, 75);
     CASE_CUDA_VERSION(114, 74);
     CASE_CUDA_VERSION(113, 73);
     CASE_CUDA_VERSION(112, 72);
diff --git a/llvm/docs/CompileCudaWithLLVM.rst b/llvm/docs/CompileCudaWithLLVM.rst
--- a/llvm/docs/CompileCudaWithLLVM.rst
+++ b/llvm/docs/CompileCudaWithLLVM.rst
@@ -23,8 +23,8 @@
 -------------
 
 CUDA is supported since llvm 3.9. Clang currently supports CUDA 7.0 through
-10.1. If clang detects a newer CUDA version, it will issue a warning and will
-attempt to use detected CUDA SDK it as if it were CUDA-10.1.
+11.5. If clang detects a newer CUDA version, it will issue a warning and will
+attempt to use detected CUDA SDK it as if it were CUDA 11.5.
 
 Before you build CUDA code, you'll need to have installed the CUDA SDK.  See
 `NVIDIA's CUDA installation guide
diff --git a/llvm/lib/Target/NVPTX/NVPTX.td b/llvm/lib/Target/NVPTX/NVPTX.td
--- a/llvm/lib/Target/NVPTX/NVPTX.td
+++ b/llvm/lib/Target/NVPTX/NVPTX.td
@@ -93,6 +93,8 @@
                              "Use PTX version 7.3">;
 def PTX74 : SubtargetFeature<"ptx74", "PTXVersion", "74",
                              "Use PTX version 7.4">;
+def PTX75 : SubtargetFeature<"ptx75", "PTXVersion", "75",
+                             "Use PTX version 7.5">;
 
 //===----------------------------------------------------------------------===//
 // NVPTX supported processors.