llvm-6502/test/CodeGen/NVPTX/ldu-i8.ll
Justin Holewinski cb8f98382b [NVPTX] Fix handling of ldg/ldu intrinsics.
The address space of the pointer must be global (1) for these intrinsics.  There must also be alignment metadata attached to the intrinsic calls, e.g.

%val = tail call i32 @llvm.nvvm.ldu.i.global.i32.p1i32(i32 addrspace(1)* %ptr), !align !0

!0 = metadata !{i32 4}

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211939 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-27 18:35:51 +00:00

17 lines
576 B
LLVM

; 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.p0i8(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.p0i8(i8* %a), !align !0
ret i8 %val
}
!0 = metadata !{i32 4}