From 7536ecf2916a6a986f0d328069e3a210f34d5ea7 Mon Sep 17 00:00:00 2001 From: Justin Holewinski Date: Mon, 20 May 2013 12:13:32 +0000 Subject: [NVPTX] Add GenericToNVVM IR converter to better handle idiomatic LLVM IR inputs This converter currently only handles global variables in address space 0. For these variables, they are promoted to address space 1 (global memory), and all uses are updated to point to the result of a cvta.global instruction on the new variable. The motivation for this is address space 0 global variables are illegal since we cannot declare variables in the generic address space. Instead, we place the variables in address space 1 and explicitly convert the pointer to address space 0. This is primarily intended to help new users who expect to be able to place global variables in the default address space. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182254 91177308-0d34-0410-b5e6-96231b3b80d8 --- test/CodeGen/NVPTX/generic-to-nvvm.ll | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) create mode 100644 test/CodeGen/NVPTX/generic-to-nvvm.ll (limited to 'test/CodeGen/NVPTX') diff --git a/test/CodeGen/NVPTX/generic-to-nvvm.ll b/test/CodeGen/NVPTX/generic-to-nvvm.ll new file mode 100644 index 0000000000..c9cb2f71f4 --- /dev/null +++ b/test/CodeGen/NVPTX/generic-to-nvvm.ll @@ -0,0 +1,25 @@ +; RUN: llc < %s -march=nvptx -mcpu=sm_20 -drvcuda | FileCheck %s + +target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v16:16:16-v32:32:32-v64:64:64-v128:128:128-n16:32:64" + +; Ensure global variables in address space 0 are promoted to address space 1 + +; CHECK: .global .align 4 .u32 myglobal = 42; +@myglobal = internal global i32 42, align 4 +; CHECK: .global .align 4 .u32 myconst = 42; +@myconst = internal constant i32 42, align 4 + + +define void @foo(i32* %a, i32* %b) { +; CHECK: cvta.global.u32 + %ld1 = load i32* @myglobal +; CHECK: cvta.global.u32 + %ld2 = load i32* @myconst + store i32 %ld1, i32* %a + store i32 %ld2, i32* %b + ret void +} + + +!nvvm.annotations = !{!0} +!0 = metadata !{void (i32*, i32*)* @foo, metadata !"kernel", i32 1} -- cgit v1.2.3