[RISCV] Move RISCV::RVVBitsPerBlock from TargetParser to Support/RISCVISAInfo.h.

RISCVTargetParser.h has a dependency on a tablegen generated file.

Using RISCVISAInfo.h instead avoids this dependency.

We just need this constant somewhere visible to the frontend and
backend and I'm trying to avoid adding a header just for it.

clang/lib/AST/ASTContext.cpp

@@ -85,7 +85,7 @@
 #include "llvm/Support/MD5.h"
 #include "llvm/Support/MathExtras.h"
 #include "llvm/Support/raw_ostream.h"
-#include "llvm/TargetParser/RISCVTargetParser.h"
+#include "llvm/Support/RISCVISAInfo.h"
 #include "llvm/TargetParser/Triple.h"
 #include <algorithm>
 #include <cassert>

clang/lib/AST/Type.cpp

@@ -46,7 +46,7 @@
 #include "llvm/Support/Casting.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/MathExtras.h"
-#include "llvm/TargetParser/RISCVTargetParser.h"
+#include "llvm/Support/RISCVISAInfo.h"
 #include <algorithm>
 #include <cassert>
 #include <cstdint>

clang/lib/CodeGen/TargetInfo.cpp

@@ -33,7 +33,7 @@
 #include "llvm/IR/Type.h"
 #include "llvm/Support/MathExtras.h"
 #include "llvm/Support/raw_ostream.h"
-#include "llvm/TargetParser/RISCVTargetParser.h"
+#include "llvm/Support/RISCVISAInfo.h"
 #include "llvm/TargetParser/Triple.h"
 #include <algorithm>
 

clang/lib/Driver/SanitizerArgs.cpp

@@ -19,7 +19,6 @@
 #include "llvm/Support/SpecialCaseList.h"
 #include "llvm/Support/VirtualFileSystem.h"
 #include "llvm/TargetParser/AArch64TargetParser.h"
-#include "llvm/TargetParser/RISCVTargetParser.h"
 #include "llvm/TargetParser/TargetParser.h"
 #include "llvm/Transforms/Instrumentation/AddressSanitizerOptions.h"
 #include <memory>

clang/lib/Sema/CMakeLists.txt

@@ -71,7 +71,6 @@ add_clang_library(clangSema
   DEPENDS
   ClangOpenCLBuiltinsImpl
   omp_gen
-  RISCVTargetParserTableGen
 
   LINK_LIBS
   clangAST

clang/lib/Sema/SemaType.cpp

@@ -40,7 +40,7 @@
 #include "llvm/ADT/SmallString.h"
 #include "llvm/IR/DerivedTypes.h"
 #include "llvm/Support/ErrorHandling.h"
-#include "llvm/TargetParser/RISCVTargetParser.h"
+#include "llvm/Support/RISCVISAInfo.h"
 #include <bitset>
 #include <optional>
 

llvm/include/llvm/Support/RISCVISAInfo.h

@@ -22,6 +22,11 @@ struct RISCVExtensionInfo {
   unsigned MinorVersion;
 };
 
+namespace RISCV {
+// We use 64 bits as the known part in the scalable vector types.
+static constexpr unsigned RVVBitsPerBlock = 64;
+}
+
 class RISCVISAInfo {
 public:
   RISCVISAInfo(const RISCVISAInfo &) = delete;

llvm/include/llvm/TargetParser/RISCVTargetParser.h

@@ -15,17 +15,11 @@
 #define LLVM_TARGETPARSER_RISCVTARGETPARSER_H
 
 #include "llvm/ADT/StringRef.h"
-#include <vector>
 
 namespace llvm {
 
-class Triple;
-
 namespace RISCV {
 
-// We use 64 bits as the known part in the scalable vector types.
-static constexpr unsigned RVVBitsPerBlock = 64;
-
 enum CPUKind : unsigned {
 #define PROC(ENUM, NAME, DEFAULT_MARCH) CK_##ENUM,
 #define TUNE_PROC(ENUM, NAME) CK_##ENUM,

llvm/lib/Target/RISCV/RISCVISelLowering.h

@@ -18,7 +18,6 @@
 #include "llvm/CodeGen/CallingConvLower.h"
 #include "llvm/CodeGen/SelectionDAG.h"
 #include "llvm/CodeGen/TargetLowering.h"
-#include "llvm/TargetParser/RISCVTargetParser.h"
 #include <optional>
 
 namespace llvm {