Index: lib/Target/NVPTX/NVPTXAsmPrinter.cpp =================================================================== --- lib/Target/NVPTX/NVPTXAsmPrinter.cpp +++ lib/Target/NVPTX/NVPTXAsmPrinter.cpp @@ -1185,7 +1185,8 @@ } else { // The frontend adds zero-initializer to variables that don't have an // initial value, so skip warning for this case. - if (!GVar->getInitializer()->isNullValue()) { + if (!GVar->getInitializer()->isNullValue() && + !isa<UndefValue>(GVar->getInitializer())) { report_fatal_error("initial value of '" + GVar->getName() + "' is not allowed in addrspace(" + Twine(PTy->getAddressSpace()) + ")"); Index: test/CodeGen/NVPTX/global-addrspace.ll =================================================================== --- /dev/null +++ test/CodeGen/NVPTX/global-addrspace.ll @@ -0,0 +1,12 @@ +; RUN: llc < %s -march=nvptx -mcpu=sm_20 | FileCheck %s --check-prefix=PTX32 +; RUN: llc < %s -march=nvptx64 -mcpu=sm_20 | FileCheck %s --check-prefix=PTX64 + +; PTX32: .visible .global .align 4 .u32 i; +; PTX32: .visible .const .align 4 .u32 j; +; PTX32: .visible .shared .align 4 .u32 k; +; PTX64: .visible .global .align 4 .u32 i; +; PTX64: .visible .const .align 4 .u32 j; +; PTX64: .visible .shared .align 4 .u32 k; +@i = addrspace(1) externally_initialized global i32 0, align 4 +@j = addrspace(4) externally_initialized global i32 0, align 4 +@k = addrspace(3) global i32 undef, align 4