GPGPU: add scop parameters to kernel arguments

llvm-svn: 275955

diff --git a/polly/lib/CodeGen/PPCGCodeGeneration.cpp b/polly/lib/CodeGen/PPCGCodeGeneration.cpp
index e38fed4..fcfc9ff 100644 (file)
--- a/polly/lib/CodeGen/PPCGCodeGeneration.cpp
+++ b/polly/lib/CodeGen/PPCGCodeGeneration.cpp
@@ -141,7 +141,7 @@ private:
   ///
   ///   - One i8 pointer for each external array reference used in the kernel.
   ///   - Host iterators
-  ///   - Parameters (TODO)
+  ///   - Parameters
   ///   - Other LLVM Value references (TODO)
   ///
   /// @param Kernel The kernel to generate the function declaration for.
@@ -228,6 +228,11 @@ Function *GPUNodeBuilder::createKernelFunctionDecl(ppcg_kernel *Kernel) {
   for (long i = 0; i < NumHostIters; i++)
     Args.push_back(Builder.getInt64Ty());
 
+  int NumVars = isl_space_dim(Kernel->space, isl_dim_param);
+
+  for (long i = 0; i < NumVars; i++)
+    Args.push_back(Builder.getInt64Ty());
+
   auto *FT = FunctionType::get(Builder.getVoidTy(), Args, false);
   auto *FN = Function::Create(FT, Function::ExternalLinkage, Identifier,
                               GPUModule.get());
@@ -250,6 +255,14 @@ Function *GPUNodeBuilder::createKernelFunctionDecl(ppcg_kernel *Kernel) {
     Arg++;
   }
 
+  for (long i = 0; i < NumVars; i++) {
+    isl_id *Id = isl_space_get_dim_id(Kernel->space, isl_dim_param, i);
+    Arg->setName(isl_id_get_name(Id));
+    IDToValue[Id] = &*Arg;
+    KernelIDs.insert(std::unique_ptr<isl_id, IslIdDeleter>(Id));
+    Arg++;
+  }
+
   return FN;
 }
 

diff --git a/polly/test/GPGPU/kernel-params-scop-parameter.ll b/polly/test/GPGPU/kernel-params-scop-parameter.ll
new file mode 100644 (file)
index 0000000..d73af4d
--- /dev/null
+++ b/polly/test/GPGPU/kernel-params-scop-parameter.ll
@@ -0,0 +1,43 @@
+; RUN: opt %loadPolly -polly-codegen-ppcg -polly-acc-dump-kernel-ir \
+; RUN: -disable-output < %s | \
+; RUN: FileCheck -check-prefix=KERNEL-IR %s
+
+;    void kernel_params_scop_parameter(float A[], long n) {
+;      for (long i = 0; i < n; i++)
+;        A[i] += 42;
+;    }
+
+; KERNEL-IR: define ptx_kernel void @kernel_0(i8* %MemRef_A, i64 %n) {
+; KERNEL-IR-NEXT: entry:
+; KERNEL-IR-NEXT:   %0 = call i32 @llvm.nvvm.read.ptx.sreg.ctaid.x()
+; KERNEL-IR-NEXT:   %b0 = zext i32 %0 to i64
+; KERNEL-IR-NEXT:   %1 = call i32 @llvm.nvvm.read.ptx.sreg.tid.x()
+; KERNEL-IR-NEXT:   %t0 = zext i32 %1 to i64
+; KERNEL-IR-NEXT:   ret void
+; KERNEL-IR-NEXT: }
+
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+
+define void @kernel_params_scop_parameter(float* %A, i64 %n) {
+bb:
+  br label %bb1
+
+bb1:                                              ; preds = %bb6, %bb
+  %i.0 = phi i64 [ 0, %bb ], [ %tmp7, %bb6 ]
+  %tmp = icmp slt i64 %i.0, %n
+  br i1 %tmp, label %bb2, label %bb8
+
+bb2:                                              ; preds = %bb1
+  %tmp3 = getelementptr inbounds float, float* %A, i64 %i.0
+  %tmp4 = load float, float* %tmp3, align 4
+  %tmp5 = fadd float %tmp4, 4.200000e+01
+  store float %tmp5, float* %tmp3, align 4
+  br label %bb6
+
+bb6:                                              ; preds = %bb2
+  %tmp7 = add nuw nsw i64 %i.0, 1
+  br label %bb1
+
+bb8:                                              ; preds = %bb1
+  ret void
+}