llvm-project

e9866d5d - [flang][cuda] Fix GPULaunchKernelConversion to generate correct kernel launch parameters (#119431)

[flang][cuda] Fix GPULaunchKernelConversion to generate correct kernel launch parameters (#119431) For the call to _FortranACUFLaunchKernel, we store the pointer to a member of a temporary structure in a parameter array. However, when we obtain an element pointer from the parameter array, its address is calculated based on the type of the structure. This PR properly treats the parameter array as an array of pointers. Example: ```mlir %30 = llvm.load %29 : !llvm.ptr -> i32 %31 = llvm.mlir.constant(1 : i32) : i32 %32 = llvm.alloca %31 x !llvm.struct<(i64, i64, i32, ptr)> : (i32) -> !llvm.ptr %33 = llvm.mlir.constant(4 : i32) : i32 %34 = llvm.alloca %33 x !llvm.ptr : (i32) -> !llvm.ptr %35 = llvm.mlir.constant(0 : i32) : i32 %36 = llvm.getelementptr %32[%35] : (!llvm.ptr, i32) -> !llvm.ptr, !llvm.struct<(i64, i64, i32, ptr)> llvm.store %8, %36 : i64, !llvm.ptr %37 = llvm.getelementptr %34[%35] : (!llvm.ptr, i32) -> !llvm.ptr, !llvm.struct<(i64, i64, i32, ptr)> llvm.store %36, %37 : !llvm.ptr, !llvm.ptr ... llvm.call @_FortranACUFLaunchKernel(%47, %8, %8, %8, %2, %8, %8, %7, %34, %48) : (!llvm.ptr, i64, i64, i64, i64, i64, i64, i32, !llvm.ptr, !llvm.ptr) -> () ``` In this example, `%37 = llvm.getelementptr %34[%35] : (!llvm.ptr, i32) -> !llvm.ptr, !llvm.struct<(i64, i64, i32, ptr)>` will be `%37 = llvm.getelementptr %34[%35] : (!llvm.ptr, i32) -> !llvm.ptr, !llvm.ptr`.