AMDGPUPrintfRuntimeBinding: Do not set SPIR_FUNC calling convention. (#11)

Author: nhaustov

lib/Target/AMDGPU/AMDGPUPrintfRuntimeBinding.cpp

@@ -394,7 +394,6 @@ bool AMDGPUPrintfRuntimeBinding::lowerPrintfForGpu(Module &M) {
       Constant *PrintfAllocFn
         = M.getOrInsertFunction(StringRef("__printf_alloc"), FTy_alloc, Attr);
       Function *Afn = dyn_cast<Function>(PrintfAllocFn);
-      Afn->setCallingConv(llvm::CallingConv::SPIR_FUNC);
       DEBUG(dbgs() << "inserting printf_alloc decl, an extern @ pre-link:");
       DEBUG(dbgs() << *Afn);
 
@@ -420,7 +419,6 @@ bool AMDGPUPrintfRuntimeBinding::lowerPrintfForGpu(Module &M) {
       alloc_args.push_back(sumC);
       CallInst *pcall = CallInst::Create( Afn, alloc_args,
                                          "printf_alloc_fn", CI);
-      pcall->setCallingConv(llvm::CallingConv::SPIR_FUNC);
 
       //
       // Insert code to split basicblock with a

test/CodeGen/AMDGPU/opencl-printf.ll

@@ -1,6 +1,6 @@
 ; RUN: opt -mtriple=amdgcn--amdhsa -amdgpu-printf-runtime-binding -mcpu=fiji -S < %s | FileCheck %s
 ; CHECK-LABEL: entry
-; CHECK: call spir_func i8 addrspace(1)* @__printf_alloc
+; CHECK: call i8 addrspace(1)* @__printf_alloc
 ; CHECK-LABEL: entry.split
 ; CHECK: icmp ne i8 addrspace(1)* %printf_alloc_fn, null
 ; CHECK: %PrintBuffID = getelementptr i8, i8 addrspace(1)* %printf_alloc_fn, i32 0