[RISCV] Emit predefined macro __riscv_cmodel_large for large code model (#108131)

Co-authored-by: patrick <patrick@andestech.com>

Author: tclin914

clang/lib/Basic/Targets/RISCV.cpp

@@ -146,6 +146,8 @@ void RISCVTargetInfo::getTargetDefines(const LangOptions &Opts,
     Builder.defineMacro("__riscv_cmodel_medlow");
   else if (CodeModel == "medium")
     Builder.defineMacro("__riscv_cmodel_medany");
+  else if (CodeModel == "large")
+    Builder.defineMacro("__riscv_cmodel_large");
 
   StringRef ABIName = getABI();
   if (ABIName == "ilp32f" || ABIName == "lp64f")

clang/test/Preprocessor/riscv-cmodel.c

@@ -15,6 +15,7 @@
 
 // CHECK-MEDLOW: #define __riscv_cmodel_medlow 1
 // CHECK-MEDLOW-NOT: __riscv_cmodel_medany
+// CHECK-MEDLOW-NOT: __riscv_cmodel_large
 
 // RUN: %clang --target=riscv32-unknown-linux-gnu -march=rv32i -x c -E -dM %s \
 // RUN: -mcmodel=medium -o - | FileCheck --check-prefix=CHECK-MEDANY %s
@@ -28,3 +29,11 @@
 
 // CHECK-MEDANY: #define __riscv_cmodel_medany 1
 // CHECK-MEDANY-NOT: __riscv_cmodel_medlow
+// CHECK-MEDANY-NOT: __riscv_cmodel_large
+
+// RUN: %clang --target=riscv64-unknown-linux-gnu -march=rv64i -fno-pic -x c -E -dM %s \
+// RUN: -mcmodel=large -o - | FileCheck --check-prefix=CHECK-LARGE %s
+
+// CHECK-LARGE: #define __riscv_cmodel_large 1
+// CHECK-LARGE-NOT: __riscv_cmodel_medlow
+// CHECK-LARGE-NOT: __riscv_cmodel_medany