AArch64: teach Clang about __clear_cache intrinsic
libgcc provides a __clear_cache intrinsic on AArch64, much like it
does on 32-bit ARM.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@181111 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGBuiltin.cpp b/lib/CodeGen/CGBuiltin.cpp
index 37bd8fc..d187678 100644
--- a/lib/CodeGen/CGBuiltin.cpp
+++ b/lib/CodeGen/CGBuiltin.cpp
@@ -1502,6 +1502,8 @@
Value *CodeGenFunction::EmitTargetBuiltinExpr(unsigned BuiltinID,
const CallExpr *E) {
switch (getTarget().getTriple().getArch()) {
+ case llvm::Triple::aarch64:
+ return EmitAArch64BuiltinExpr(BuiltinID, E);
case llvm::Triple::arm:
case llvm::Triple::thumb:
return EmitARMBuiltinExpr(BuiltinID, E);
@@ -1621,6 +1623,25 @@
return std::make_pair(EmitScalarExpr(Addr), Align);
}
+Value *CodeGenFunction::EmitAArch64BuiltinExpr(unsigned BuiltinID,
+ const CallExpr *E) {
+ if (BuiltinID == AArch64::BI__clear_cache) {
+ assert(E->getNumArgs() == 2 &&
+ "Variadic __clear_cache slipped through on AArch64");
+
+ const FunctionDecl *FD = E->getDirectCallee();
+ SmallVector<Value *, 2> Ops;
+ for (unsigned i = 0; i < E->getNumArgs(); i++)
+ Ops.push_back(EmitScalarExpr(E->getArg(i)));
+ llvm::Type *Ty = CGM.getTypes().ConvertType(FD->getType());
+ llvm::FunctionType *FTy = cast<llvm::FunctionType>(Ty);
+ StringRef Name = FD->getName();
+ return EmitNounwindRuntimeCall(CGM.CreateRuntimeFunction(FTy, Name), Ops);
+ }
+
+ return 0;
+}
+
Value *CodeGenFunction::EmitARMBuiltinExpr(unsigned BuiltinID,
const CallExpr *E) {
if (BuiltinID == ARM::BI__clear_cache) {