From cb8f98382be7361c94439f48ec9b297e4d70c49e Mon Sep 17 00:00:00 2001
From: Justin Holewinski <jholewinski@nvidia.com>
Date: Fri, 27 Jun 2014 18:35:51 +0000
Subject: [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
---
 test/CodeGen/NVPTX/ldu-i8.ll              |  6 +++--
 test/CodeGen/NVPTX/ldu-ldg.ll             | 40 +++++++++++++++++++++++++++++++
 test/CodeGen/NVPTX/ldu-reg-plus-offset.ll |  6 ++---
 3 files changed, 47 insertions(+), 5 deletions(-)
 create mode 100644 test/CodeGen/NVPTX/ldu-ldg.ll

(limited to 'test')

diff --git a/test/CodeGen/NVPTX/ldu-i8.ll b/test/CodeGen/NVPTX/ldu-i8.ll
index 81a82b2c38..9cc6675579 100644
--- a/test/CodeGen/NVPTX/ldu-i8.ll
+++ b/test/CodeGen/NVPTX/ldu-i8.ll
@@ -2,13 +2,15 @@
 
 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*)
+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(i8* %a)
+  %val = tail call i8 @llvm.nvvm.ldu.global.i.i8.p0i8(i8* %a), !align !0
   ret i8 %val
 }
+
+!0 = metadata !{i32 4}
diff --git a/test/CodeGen/NVPTX/ldu-ldg.ll b/test/CodeGen/NVPTX/ldu-ldg.ll
new file mode 100644
index 0000000000..3b0619ff51
--- /dev/null
+++ b/test/CodeGen/NVPTX/ldu-ldg.ll
@@ -0,0 +1,40 @@
+; RUN: llc < %s -march=nvptx -mcpu=sm_20 | FileCheck %s
+
+
+declare i8 @llvm.nvvm.ldu.global.i.i8.p1i8(i8 addrspace(1)* %ptr)
+declare i32 @llvm.nvvm.ldu.global.i.i32.p1i32(i32 addrspace(1)* %ptr)
+declare i8 @llvm.nvvm.ldg.global.i.i8.p1i8(i8 addrspace(1)* %ptr)
+declare i32 @llvm.nvvm.ldg.global.i.i32.p1i32(i32 addrspace(1)* %ptr)
+
+
+; CHECK: func0
+define i8 @func0(i8 addrspace(1)* %ptr) {
+; ldu.global.u8
+  %val = tail call i8 @llvm.nvvm.ldu.global.i.i8.p1i8(i8 addrspace(1)* %ptr), !align !0
+  ret i8 %val
+}
+
+; CHECK: func1
+define i32 @func1(i32 addrspace(1)* %ptr) {
+; ldu.global.u32
+  %val = tail call i32 @llvm.nvvm.ldu.global.i.i32.p1i32(i32 addrspace(1)* %ptr), !align !0
+  ret i32 %val
+}
+
+; CHECK: func2
+define i8 @func2(i8 addrspace(1)* %ptr) {
+; ld.global.nc.u8
+  %val = tail call i8 @llvm.nvvm.ldg.global.i.i8.p1i8(i8 addrspace(1)* %ptr), !align !0
+  ret i8 %val
+}
+
+; CHECK: func3
+define i32 @func3(i32 addrspace(1)* %ptr) {
+; ld.global.nc.u32
+  %val = tail call i32 @llvm.nvvm.ldg.global.i.i32.p1i32(i32 addrspace(1)* %ptr), !align !0
+  ret i32 %val
+}
+
+
+
+!0 = metadata !{i32 4}
diff --git a/test/CodeGen/NVPTX/ldu-reg-plus-offset.ll b/test/CodeGen/NVPTX/ldu-reg-plus-offset.ll
index 26cadc401b..55707ea851 100644
--- a/test/CodeGen/NVPTX/ldu-reg-plus-offset.ll
+++ b/test/CodeGen/NVPTX/ldu-reg-plus-offset.ll
@@ -7,9 +7,9 @@ define void @reg_plus_offset(i32* %a) {
 ; CHECK:        ldu.global.u32  %r{{[0-9]+}}, [%r{{[0-9]+}}+32];
 ; CHECK:        ldu.global.u32  %r{{[0-9]+}}, [%r{{[0-9]+}}+36];
   %p2 = getelementptr i32* %a, i32 8
-  %t1 = call i32 @llvm.nvvm.ldu.global.i.i32(i32* %p2), !align !1
+  %t1 = call i32 @llvm.nvvm.ldu.global.i.i32.p0i32(i32* %p2), !align !1
   %p3 = getelementptr i32* %a, i32 9
-  %t2 = call i32 @llvm.nvvm.ldu.global.i.i32(i32* %p3), !align !1
+  %t2 = call i32 @llvm.nvvm.ldu.global.i.i32.p0i32(i32* %p3), !align !1
   %t3 = mul i32 %t1, %t2
   store i32 %t3, i32* %a
   ret void
@@ -17,5 +17,5 @@ define void @reg_plus_offset(i32* %a) {
 
 !1 = metadata !{ i32 4 }
 
-declare i32 @llvm.nvvm.ldu.global.i.i32(i32*)
+declare i32 @llvm.nvvm.ldu.global.i.i32.p0i32(i32*)
 declare i32 @llvm.nvvm.read.ptx.sreg.tid.x()
-- 
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