1 ; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=fiji -verify-machineinstrs < %s | FileCheck -check-prefix=GCN %s
3 ; Check that we properly realign the stack. While 4-byte access is all
4 ; that is ever needed, some transformations rely on the known bits from the alignment of the pointer (e.g.
8 ; 4 byte emergency stack slot
9 ; = 144 bytes with padding between them
11 ; GCN-LABEL: {{^}}needs_align16_default_stack_align:
12 ; GCN: s_mov_b32 s5, s32
15 ; GCN: buffer_store_dword v{{[0-9]+}}, v{{[0-9]+}}, s[0:3], s4 offen
16 ; GCN: v_or_b32_e32 v{{[0-9]+}}, 12
17 ; GCN: buffer_store_dword v{{[0-9]+}}, v{{[0-9]+}}, s[0:3], s4 offen
18 ; GCN: buffer_store_dword v{{[0-9]+}}, v{{[0-9]+}}, s[0:3], s4 offen
19 ; GCN: buffer_store_dword v{{[0-9]+}}, v{{[0-9]+}}, s[0:3], s4 offen
23 ; GCN: ; ScratchSize: 144
24 define void @needs_align16_default_stack_align(i32 %idx) #0 {
25 %alloca.align16 = alloca [8 x <4 x i32>], align 16, addrspace(5)
26 %gep0 = getelementptr inbounds [8 x <4 x i32>], [8 x <4 x i32>] addrspace(5)* %alloca.align16, i32 0, i32 %idx
27 store volatile <4 x i32> <i32 1, i32 2, i32 3, i32 4>, <4 x i32> addrspace(5)* %gep0, align 16
31 ; GCN-LABEL: {{^}}needs_align16_stack_align4:
32 ; GCN: s_add_u32 [[SCRATCH_REG:s[0-9]+]], s32, 0x3c0{{$}}
33 ; GCN: s_and_b32 s5, s6, 0xfffffc00
34 ; GCN: s_add_u32 s32, s32, 0x2800{{$}}
36 ; GCN: buffer_store_dword v{{[0-9]+}}, v{{[0-9]+}}, s[0:3], s4 offen
37 ; GCN: v_or_b32_e32 v{{[0-9]+}}, 12
38 ; GCN: buffer_store_dword v{{[0-9]+}}, v{{[0-9]+}}, s[0:3], s4 offen
39 ; GCN: buffer_store_dword v{{[0-9]+}}, v{{[0-9]+}}, s[0:3], s4 offen
40 ; GCN: buffer_store_dword v{{[0-9]+}}, v{{[0-9]+}}, s[0:3], s4 offen
42 ; GCN: s_sub_u32 s32, s32, 0x2800
44 ; GCN: ; ScratchSize: 160
45 define void @needs_align16_stack_align4(i32 %idx) #2 {
46 %alloca.align16 = alloca [8 x <4 x i32>], align 16, addrspace(5)
47 %gep0 = getelementptr inbounds [8 x <4 x i32>], [8 x <4 x i32>] addrspace(5)* %alloca.align16, i32 0, i32 %idx
48 store volatile <4 x i32> <i32 1, i32 2, i32 3, i32 4>, <4 x i32> addrspace(5)* %gep0, align 16
52 ; GCN-LABEL: {{^}}needs_align32:
53 ; GCN: s_add_u32 [[SCRATCH_REG:s[0-9]+]], s32, 0x7c0{{$}}
54 ; GCN: s_and_b32 s5, s6, 0xfffff800
55 ; GCN: s_add_u32 s32, s32, 0x3000{{$}}
57 ; GCN: buffer_store_dword v{{[0-9]+}}, v{{[0-9]+}}, s[0:3], s4 offen
58 ; GCN: v_or_b32_e32 v{{[0-9]+}}, 12
59 ; GCN: buffer_store_dword v{{[0-9]+}}, v{{[0-9]+}}, s[0:3], s4 offen
60 ; GCN: buffer_store_dword v{{[0-9]+}}, v{{[0-9]+}}, s[0:3], s4 offen
61 ; GCN: buffer_store_dword v{{[0-9]+}}, v{{[0-9]+}}, s[0:3], s4 offen
63 ; GCN: s_sub_u32 s32, s32, 0x3000
65 ; GCN: ; ScratchSize: 192
66 define void @needs_align32(i32 %idx) #0 {
67 %alloca.align16 = alloca [8 x <4 x i32>], align 32, addrspace(5)
68 %gep0 = getelementptr inbounds [8 x <4 x i32>], [8 x <4 x i32>] addrspace(5)* %alloca.align16, i32 0, i32 %idx
69 store volatile <4 x i32> <i32 1, i32 2, i32 3, i32 4>, <4 x i32> addrspace(5)* %gep0, align 32
73 ; GCN-LABEL: {{^}}force_realign4:
74 ; GCN: s_add_u32 [[SCRATCH_REG:s[0-9]+]], s32, 0xc0{{$}}
75 ; GCN: s_and_b32 s5, s6, 0xffffff00
76 ; GCN: s_add_u32 s32, s32, 0xd00{{$}}
78 ; GCN: buffer_store_dword v{{[0-9]+}}, v{{[0-9]+}}, s[0:3], s4 offen
79 ; GCN: s_sub_u32 s32, s32, 0xd00
81 ; GCN: ; ScratchSize: 52
82 define void @force_realign4(i32 %idx) #1 {
83 %alloca.align16 = alloca [8 x i32], align 4, addrspace(5)
84 %gep0 = getelementptr inbounds [8 x i32], [8 x i32] addrspace(5)* %alloca.align16, i32 0, i32 %idx
85 store volatile i32 3, i32 addrspace(5)* %gep0, align 4
89 ; GCN-LABEL: {{^}}kernel_call_align16_from_8:
90 ; GCN: s_add_u32 s32, s8, 0x400{{$}}
93 define amdgpu_kernel void @kernel_call_align16_from_8() #0 {
94 %alloca = alloca i32, align 4, addrspace(5)
95 store volatile i32 2, i32 addrspace(5)* %alloca
96 call void @needs_align16_default_stack_align(i32 1)
100 ; The call sequence should keep the stack on call aligned to 4
101 ; GCN-LABEL: {{^}}kernel_call_align16_from_5:
102 ; GCN: s_add_u32 s32, s8, 0x400
104 define amdgpu_kernel void @kernel_call_align16_from_5() {
105 %alloca0 = alloca i8, align 1, addrspace(5)
106 store volatile i8 2, i8 addrspace(5)* %alloca0
108 call void @needs_align16_default_stack_align(i32 1)
112 ; GCN-LABEL: {{^}}kernel_call_align4_from_5:
113 ; GCN: s_add_u32 s32, s8, 0x400
115 define amdgpu_kernel void @kernel_call_align4_from_5() {
116 %alloca0 = alloca i8, align 1, addrspace(5)
117 store volatile i8 2, i8 addrspace(5)* %alloca0
119 call void @needs_align16_stack_align4(i32 1)
123 attributes #0 = { noinline nounwind }
124 attributes #1 = { noinline nounwind "stackrealign" }
125 attributes #2 = { noinline nounwind alignstack=4 }