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| author | Justin Holewinski <jholewinski@nvidia.com> | 2013-07-01 12:58:48 +0000 |
|---|---|---|
| committer | Justin Holewinski <jholewinski@nvidia.com> | 2013-07-01 12:58:48 +0000 |
| commit | 30b13ebd0b3d29d5f2d3dcbccee31d3a55917277 (patch) | |
| tree | c29e9054d4f541376896d4bc5d1fc19857660600 /test/CodeGen/NVPTX | |
| parent | d212db0cac7a7d0d58ba09369808a408fa8da5c1 (diff) | |
| download | llvm-30b13ebd0b3d29d5f2d3dcbccee31d3a55917277.tar.gz llvm-30b13ebd0b3d29d5f2d3dcbccee31d3a55917277.tar.bz2 llvm-30b13ebd0b3d29d5f2d3dcbccee31d3a55917277.tar.xz | |
[NVPTX] Make sure we zero out high-order 24 bits for 8-bit load into 32-bit value
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185328 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/NVPTX')
| -rw-r--r-- | test/CodeGen/NVPTX/ldu-i8.ll | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/test/CodeGen/NVPTX/ldu-i8.ll b/test/CodeGen/NVPTX/ldu-i8.ll new file mode 100644 index 0000000000..81a82b2c38 --- /dev/null +++ b/test/CodeGen/NVPTX/ldu-i8.ll @@ -0,0 +1,14 @@ +; RUN: llc < %s -march=nvptx -mcpu=sm_20 | 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" + +declare i8 @llvm.nvvm.ldu.global.i.i8(i8*) + +define i8 @foo(i8* %a) { +; Ensure we properly truncate off the high-order 24 bits +; CHECK: ldu.global.u8 +; CHECK: cvt.u32.u16 +; CHECK: and.b32 %r{{[0-9]+}}, %r{{[0-9]+}}, 255 + %val = tail call i8 @llvm.nvvm.ldu.global.i.i8(i8* %a) + ret i8 %val +} |