AMDGPU: Initial implementation of calls

Includes a hack to fix the type selected for
the GlobalAddress of the function, which will be
fixed by changing the default datalayout to use
generic pointers for 0.

llvm-svn: 309732

1 files changed, 11 insertions, 0 deletions

diff --git a/llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.cpp b/llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.cpp
index 343bca550e7..571ee97ff36 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.cpp
@@ -123,6 +123,12 @@ static cl::opt<bool> LateCFGStructurize(
   cl::init(false),
   cl::Hidden);
 
+static cl::opt<bool> EnableAMDGPUFunctionCalls(
+  "amdgpu-function-calls",
+  cl::Hidden,
+  cl::desc("Enable AMDGPU function call support"),
+  cl::init(false));
+
 extern "C" void LLVMInitializeAMDGPUTarget() {
   // Register the target
   RegisterTargetMachine<R600TargetMachine> X(getTheAMDGPUTarget());
@@ -269,6 +275,11 @@ AMDGPUTargetMachine::AMDGPUTargetMachine(const Target &T, const Triple &TT,
 
 AMDGPUTargetMachine::~AMDGPUTargetMachine() = default;
 
+bool AMDGPUTargetMachine::enableFunctionCalls() const {
+  return EnableAMDGPUFunctionCalls &&
+         getTargetTriple().getArch() == Triple::amdgcn;
+}
+
 StringRef AMDGPUTargetMachine::getGPUName(const Function &F) const {
   Attribute GPUAttr = F.getFnAttribute("target-cpu");
   return GPUAttr.hasAttribute(Attribute::None) ?