GPGPU: use current 'Index' to find slot in parameter array

Before this change we used the array index, which would result in us accessing
the parameter array out-of-bounds. This bug was visible for test cases where not
all arrays in a scop are passed to a given kernel.

llvm-svn: 276961

1 files changed, 2 insertions, 2 deletions

diff --git a/polly/lib/CodeGen/PPCGCodeGeneration.cpp b/polly/lib/CodeGen/PPCGCodeGeneration.cpp
index 20ab4999cf7..3a6b80b75a3 100644
--- a/polly/lib/CodeGen/PPCGCodeGeneration.cpp
+++ b/polly/lib/CodeGen/PPCGCodeGeneration.cpp
@@ -903,8 +903,8 @@ Value *GPUNodeBuilder::createLaunchParameters(ppcg_kernel *Kernel,
         Builder.getInt8PtrTy(), Launch + "_param_" + std::to_string(Index),
         EntryBlock->getTerminator());
     Builder.CreateStore(DevArray, Param);
-    Value *Slot = Builder.CreateGEP(Parameters,
-                                    {Builder.getInt64(0), Builder.getInt64(i)});
+    Value *Slot = Builder.CreateGEP(
+        Parameters, {Builder.getInt64(0), Builder.getInt64(Index)});
     Value *ParamTyped =
         Builder.CreatePointerCast(Param, Builder.getInt8PtrTy());
     Builder.CreateStore(ParamTyped, Slot);