[GPGPU] Rename all, not only the first libdevice function

llvm-svn: 310194

polly/lib/CodeGen/PPCGCodeGeneration.cpp

@@ -2298,6 +2298,7 @@ std::string GPUNodeBuilder::createKernelASM() {
 }
 
 bool GPUNodeBuilder::requiresCUDALibDevice() {
+  bool RequiresLibDevice = false;
   for (Function &F : GPUModule->functions()) {
     if (!F.isDeclaration())
       continue;
@@ -2305,11 +2306,11 @@ bool GPUNodeBuilder::requiresCUDALibDevice() {
     std::string CUDALibDeviceFunc = getCUDALibDeviceFuntion(&F);
     if (CUDALibDeviceFunc.length() != 0) {
       F.setName(CUDALibDeviceFunc);
-      return true;
+      RequiresLibDevice = true;
     }
   }
 
-  return false;
+  return RequiresLibDevice;
 }
 
 void GPUNodeBuilder::addCUDALibDevice() {

polly/test/GPGPU/Inputs/libdevice-functions-copied-into-kernel_libdevice.ll

@@ -1,3 +1,6 @@
 define float @__nv_expf(float %a) {
   ret float %a
 }
+define float @__nv_cosf(float %a) {
+  ret float %a
+}

polly/test/GPGPU/libdevice-functions-copied-into-kernel.ll

@@ -19,6 +19,7 @@
 
 ; Check that the intrinsic call is present in the kernel IR.
 ; KERNEL-IR:   %p_expf = tail call float @__nv_expf(float %A.arr.i.val_p_scalar_)
+; KERNEL-IR:   %p_cosf = tail call float @__nv_cosf(float %p_expf)
 
 ; Check that kernel launch is generated in host IR.
 ; the declare would not be generated unless a call to a kernel exists.
@@ -29,6 +30,7 @@
 ;   for(int i = 0; i < N; i++) {
 ;       float tmp0 = A[i];
 ;       float tmp1 = expf(tmp1);
+;       tmp1 = cosf(tmp1);
 ;       B[i] = tmp1;
 ;   }
 ; }
@@ -52,6 +54,7 @@ for.body:                                         ; preds = %for.body.lr.ph, %fo
   %A.arr.i.val = load float, float* %A.arr.i, align 4
   ; Call to intrinsics that should be part of the kernel.
   %expf = tail call float @expf(float %A.arr.i.val)
+  %cosf = tail call float @cosf(float %expf)
   %B.arr.i = getelementptr inbounds float, float* %B, i64 %indvars.iv
   store float %expf, float* %B.arr.i, align 4
 
@@ -69,6 +72,7 @@ for.end:                                          ; preds = %for.cond.for.end_cr
 
 ; Function Attrs: nounwind readnone
 declare float @expf(float) #0
+declare float @cosf(float) #0
 
 attributes #0 = { nounwind readnone }