[PowerPC] Support set_flt_rounds builtin

Author: ecnelises

clang/lib/Sema/SemaChecking.cpp

@@ -2227,10 +2227,11 @@ Sema::CheckBuiltinFunctionCall(FunctionDecl *FDecl, unsigned BuiltinID,
     break;
 
   case Builtin::BI__builtin_set_flt_rounds:
-    if (CheckBuiltinTargetInSupported(*this, BuiltinID, TheCall,
-                                      {llvm::Triple::x86, llvm::Triple::x86_64,
-                                       llvm::Triple::arm, llvm::Triple::thumb,
-                                       llvm::Triple::aarch64}))
+    if (CheckBuiltinTargetInSupported(
+            *this, BuiltinID, TheCall,
+            {llvm::Triple::x86, llvm::Triple::x86_64, llvm::Triple::arm,
+             llvm::Triple::thumb, llvm::Triple::aarch64, llvm::Triple::ppc,
+             llvm::Triple::ppc64, llvm::Triple::ppc64le}))
       return ExprError();
     break;
 

clang/test/CodeGen/builtin_set_flt_rounds.c

@@ -2,6 +2,8 @@
 // RUN: %clang_cc1 -triple x86_64-windows-msvc %s -emit-llvm -o - | FileCheck %s
 // RUN: %clang_cc1 -triple aarch64-gnu-linux %s -emit-llvm -o - | FileCheck %s
 // RUN: %clang_cc1 -triple aarch64-windows-msvc %s -emit-llvm -o - | FileCheck %s
+// RUN: %clang_cc1 -triple powerpc64le-unknown-linux-gnu %s -emit-llvm -o - | FileCheck %s
+// RUN: %clang_cc1 -triple powerpc-ibm-aix %s -emit-llvm -o - | FileCheck %s
 void test_builtin_set_flt_rounds() {
   __builtin_set_flt_rounds(1);
   // CHECK: call void @llvm.set.rounding(i32 1)