1 ; RUN: llc -mtriple amdgcn--amdhsa -mcpu=fiji -amdgpu-scalarize-global-loads=true -verify-machineinstrs < %s | FileCheck %s
5 ; Load from %arg has alias store in Loop
7 ; CHECK: flat_load_dword
9 ; #####################################################################
11 ; Load from %arg1 has no-alias store in Loop - arg1[i+1] never alias arg1[i]
12 ; However, our analysis cannot detect this.
14 ; CHECK: flat_load_dword
16 ; #####################################################################
20 ; Load from %arg in a Loop body has alias store
22 ; CHECK: flat_load_dword
26 ; CHECK: flat_store_dword
28 define amdgpu_kernel void @cfg(i32 addrspace(1)* nocapture readonly %arg, i32 addrspace(1)* nocapture %arg1, i32 %arg2) #0 {
30 %tmp = sext i32 %arg2 to i64
31 %tmp3 = getelementptr inbounds i32, i32 addrspace(1)* %arg, i64 %tmp
32 %tmp4 = load i32, i32 addrspace(1)* %tmp3, align 4, !tbaa !0
33 %tmp5 = icmp sgt i32 %tmp4, 0
34 br i1 %tmp5, label %bb6, label %bb8
42 bb8: ; preds = %bb7, %bb
43 %tmp9 = phi i32 [ 0, %bb ], [ %tmp30, %bb7 ]
44 %tmp10 = getelementptr inbounds i32, i32 addrspace(1)* %arg1, i64 %tmp
45 store i32 %tmp9, i32 addrspace(1)* %tmp10, align 4, !tbaa !0
48 bb11: ; preds = %bb22, %bb6
49 %tmp12 = phi i32 [ %tmp30, %bb22 ], [ 0, %bb6 ]
50 %tmp13 = phi i32 [ %tmp25, %bb22 ], [ 0, %bb6 ]
51 %tmp14 = srem i32 %tmp13, %arg2
52 %tmp15 = sext i32 %tmp14 to i64
53 %tmp16 = getelementptr inbounds i32, i32 addrspace(1)* %arg, i64 %tmp15
54 %tmp17 = load i32, i32 addrspace(1)* %tmp16, align 4, !tbaa !0
55 %tmp18 = icmp sgt i32 %tmp17, 100
56 %tmp19 = sext i32 %tmp13 to i64
57 br i1 %tmp18, label %bb20, label %bb22
60 %tmp21 = getelementptr inbounds i32, i32 addrspace(1)* %arg1, i64 %tmp19
61 store i32 0, i32 addrspace(1)* %tmp21, align 4, !tbaa !0
64 bb22: ; preds = %bb20, %bb11
65 %tmp23 = getelementptr inbounds i32, i32 addrspace(1)* %arg, i64 %tmp19
66 %tmp24 = load i32, i32 addrspace(1)* %tmp23, align 4, !tbaa !0
67 %tmp25 = add nuw nsw i32 %tmp13, 1
68 %tmp26 = sext i32 %tmp25 to i64
69 %tmp27 = getelementptr inbounds i32, i32 addrspace(1)* %arg1, i64 %tmp26
70 %tmp28 = load i32, i32 addrspace(1)* %tmp27, align 4, !tbaa !0
71 %tmp29 = add i32 %tmp24, %tmp12
72 %tmp30 = add i32 %tmp29, %tmp28
73 %tmp31 = icmp eq i32 %tmp25, %tmp4
74 br i1 %tmp31, label %bb7, label %bb11
77 ; one more test to ensure that aliasing store after the load
78 ; is considered clobbering if load parent block is the same
79 ; as a loop header block.
83 ; Load from %arg has alias store that is after the load
84 ; but is considered clobbering because of the loop.
86 ; CHECK: flat_load_dword
88 define amdgpu_kernel void @cfg_selfloop(i32 addrspace(1)* nocapture readonly %arg, i32 addrspace(1)* nocapture %arg1, i32 %arg2) #0 {
96 %tmp13 = phi i32 [ %tmp25, %bb1 ], [ 0, %bb ]
97 %tmp14 = srem i32 %tmp13, %arg2
98 %tmp15 = sext i32 %tmp14 to i64
99 %tmp16 = getelementptr inbounds i32, i32 addrspace(1)* %arg, i64 %tmp15
100 %tmp17 = load i32, i32 addrspace(1)* %tmp16, align 4, !tbaa !0
101 %tmp19 = sext i32 %tmp13 to i64
102 %tmp21 = getelementptr inbounds i32, i32 addrspace(1)* %arg1, i64 %tmp19
103 store i32 %tmp17, i32 addrspace(1)* %tmp21, align 4, !tbaa !0
104 %tmp25 = add nuw nsw i32 %tmp13, 1
105 %tmp31 = icmp eq i32 %tmp25, 100
106 br i1 %tmp31, label %bb2, label %bb1
110 attributes #0 = { "target-cpu"="fiji" }
112 !0 = !{!1, !1, i64 0}
113 !1 = !{!"int", !2, i64 0}
114 !2 = !{!"omnipotent char", !3, i64 0}
115 !3 = !{!"Simple C/C++ TBAA"}