[llvm] [mlir] [mlir][nvvm] Expose MLIR_NVPTXCOMPILER_ENABLED in mlir-config.h. (PR #84007)

[Ingo Müller via llvm-commits]

https://github.com/ingomueller-net updated https://github.com/llvm/llvm-project/pull/84007

>From 95ec9b0658e3b4170679d827851cfe5f32e81d42 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ingo=20M=C3=BCller?= <ingomueller at google.com>
Date: Tue, 5 Mar 2024 10:14:00 +0000
Subject: [PATCH] [mlir][nvvm] Expose MLIR_NVPTXCOMPILER_ENABLED in
 mlir-config.h.

This is another follow-up of #83004, which made the same change for
`MLIR_CUDA_CONVERSIONS_ENABLED`. As the previous PR, this PR commit
exposes mentioned CMake variable through `mlir-config.h` and uses the
macro that is introduced with the same name. This replaces the macro
`MLIR_NVPTXCOMPILER_ENABLED`, which the CMake files previously defined
manually.
---
 mlir/include/mlir/Config/mlir-config.h.cmake      |  3 +++
 mlir/lib/Target/LLVM/CMakeLists.txt               |  1 -
 mlir/lib/Target/LLVM/NVVM/Target.cpp              | 10 +++++-----
 utils/bazel/llvm-project-overlay/mlir/BUILD.bazel | 10 ++++++++--
 4 files changed, 16 insertions(+), 8 deletions(-)

diff --git a/mlir/include/mlir/Config/mlir-config.h.cmake b/mlir/include/mlir/Config/mlir-config.h.cmake
index a0176063b47404..5acf7311b1f3ae 100644
--- a/mlir/include/mlir/Config/mlir-config.h.cmake
+++ b/mlir/include/mlir/Config/mlir-config.h.cmake
@@ -33,6 +33,9 @@
    and targets. */
 #cmakedefine01 MLIR_ENABLE_CUDA_CONVERSIONS
 
+/* If set, enables features that depend on the NVIDIA's PTX compiler. */
+#cmakedefine01 MLIR_ENABLE_NVPTXCOMPILER
+
 /* If set, enables ROCm-related features in ROCM-related transforms, pipelines,
    and targets. */
 #cmakedefine01 MLIR_ENABLE_ROCM_CONVERSIONS
diff --git a/mlir/lib/Target/LLVM/CMakeLists.txt b/mlir/lib/Target/LLVM/CMakeLists.txt
index cc2c3a00a02eaf..e0657c895e8a38 100644
--- a/mlir/lib/Target/LLVM/CMakeLists.txt
+++ b/mlir/lib/Target/LLVM/CMakeLists.txt
@@ -93,7 +93,6 @@ if(MLIR_ENABLE_CUDA_CONVERSIONS)
   # Define the `CUDAToolkit` path.
   target_compile_definitions(obj.MLIRNVVMTarget
     PRIVATE
-    MLIR_NVPTXCOMPILER_ENABLED=${MLIR_ENABLE_NVPTXCOMPILER}
     __DEFAULT_CUDATOOLKIT_PATH__="${MLIR_CUDAToolkit_ROOT}"
   )
 endif()
diff --git a/mlir/lib/Target/LLVM/NVVM/Target.cpp b/mlir/lib/Target/LLVM/NVVM/Target.cpp
index d5b6645631edd6..c7dd730cf7364a 100644
--- a/mlir/lib/Target/LLVM/NVVM/Target.cpp
+++ b/mlir/lib/Target/LLVM/NVVM/Target.cpp
@@ -431,7 +431,7 @@ NVPTXSerializer::compileToBinary(const std::string &ptxCode) {
   return SmallVector<char, 0>(fatbin.begin(), fatbin.end());
 }
 
-#if MLIR_NVPTXCOMPILER_ENABLED == 1
+#if MLIR_ENABLE_NVPTXCOMPILER
 #include "nvPTXCompiler.h"
 
 #define RETURN_ON_NVPTXCOMPILER_ERROR(expr)                                    \
@@ -510,7 +510,7 @@ NVPTXSerializer::compileToBinaryNVPTX(const std::string &ptxCode) {
   RETURN_ON_NVPTXCOMPILER_ERROR(nvPTXCompilerDestroy(&compiler));
   return binary;
 }
-#endif // MLIR_NVPTXCOMPILER_ENABLED == 1
+#endif // MLIR_ENABLE_NVPTXCOMPILER
 
 std::optional<SmallVector<char, 0>>
 NVPTXSerializer::moduleToObject(llvm::Module &llvmModule) {
@@ -556,12 +556,12 @@ NVPTXSerializer::moduleToObject(llvm::Module &llvmModule) {
     return SmallVector<char, 0>(bin.begin(), bin.end());
   }
 
-    // Compile to binary.
-#if MLIR_NVPTXCOMPILER_ENABLED == 1
+  // Compile to binary.
+#if MLIR_ENABLE_NVPTXCOMPILER
   return compileToBinaryNVPTX(*serializedISA);
 #else
   return compileToBinary(*serializedISA);
-#endif // MLIR_NVPTXCOMPILER_ENABLED == 1
+#endif // MLIR_ENABLE_NVPTXCOMPILER
 }
 #endif // MLIR_ENABLE_CUDA_CONVERSIONS
 
diff --git a/utils/bazel/llvm-project-overlay/mlir/BUILD.bazel b/utils/bazel/llvm-project-overlay/mlir/BUILD.bazel
index 7f33f165992213..734b7537b2757e 100644
--- a/utils/bazel/llvm-project-overlay/mlir/BUILD.bazel
+++ b/utils/bazel/llvm-project-overlay/mlir/BUILD.bazel
@@ -37,8 +37,14 @@ expand_template(
         "#cmakedefine01 MLIR_ENABLE_PDL_IN_PATTERNMATCH": "#define MLIR_ENABLE_PDL_IN_PATTERNMATCH 1",
         "#cmakedefine01 MLIR_ENABLE_ROCM_CONVERSIONS": "#define MLIR_ENABLE_ROCM_CONVERSIONS 0",
     } | if_cuda_available(
-        {"#cmakedefine01 MLIR_ENABLE_CUDA_CONVERSIONS": "#define MLIR_ENABLE_CUDA_CONVERSIONS 1"},
-        {"#cmakedefine01 MLIR_ENABLE_CUDA_CONVERSIONS": "#define MLIR_ENABLE_CUDA_CONVERSIONS 0"},
+        {
+            "#cmakedefine01 MLIR_ENABLE_CUDA_CONVERSIONS": "#define MLIR_ENABLE_CUDA_CONVERSIONS 1",
+            "#cmakedefine01 MLIR_ENABLE_NVPTXCOMPILER": "#define MLIR_ENABLE_NVPTXCOMPILER 1",
+        },
+        {
+            "#cmakedefine01 MLIR_ENABLE_CUDA_CONVERSIONS": "#define MLIR_ENABLE_CUDA_CONVERSIONS 0",
+            "#cmakedefine01 MLIR_ENABLE_NVPTXCOMPILER": "#define MLIR_ENABLE_NVPTXCOMPILER 0",
+        },
     ),
     template = "include/mlir/Config/mlir-config.h.cmake",
 )