1 ; RUN: llc -mtriple=amdgcn--amdhsa -mcpu=fiji -amdgpu-spill-sgpr-to-smem=0 -verify-machineinstrs < %s | FileCheck -check-prefix=TOSGPR -check-prefix=ALL %s
3 ; If spilling to smem, additional registers are used for the resource
6 ; FIXME: Vectorization can increase required SGPR count beyond limit.
7 ; FIXME: SGPR-to-SMEM requires an additional SGPR always to scavenge m0
9 ; ALL-LABEL: {{^}}max_9_sgprs:
12 ; ALL: NumSGPRsForWavesPerEU: 9
13 define amdgpu_kernel void @max_9_sgprs() #0 {
14 %one = load volatile i32, i32 addrspace(4)* undef
15 %two = load volatile i32, i32 addrspace(4)* undef
16 %three = load volatile i32, i32 addrspace(4)* undef
17 %four = load volatile i32, i32 addrspace(4)* undef
18 %five = load volatile i32, i32 addrspace(4)* undef
19 %six = load volatile i32, i32 addrspace(4)* undef
20 %seven = load volatile i32, i32 addrspace(4)* undef
21 %eight = load volatile i32, i32 addrspace(4)* undef
22 %nine = load volatile i32, i32 addrspace(4)* undef
23 %ten = load volatile i32, i32 addrspace(4)* undef
24 call void asm sideeffect "", "s,s,s,s,s,s,s,s,s"(i32 %one, i32 %two, i32 %three, i32 %four, i32 %five, i32 %six, i32 %seven, i32 %eight, i32 %nine)
25 store volatile i32 %one, i32 addrspace(1)* undef
26 store volatile i32 %two, i32 addrspace(1)* undef
27 store volatile i32 %three, i32 addrspace(1)* undef
28 store volatile i32 %four, i32 addrspace(1)* undef
29 store volatile i32 %five, i32 addrspace(1)* undef
30 store volatile i32 %six, i32 addrspace(1)* undef
31 store volatile i32 %seven, i32 addrspace(1)* undef
32 store volatile i32 %eight, i32 addrspace(1)* undef
33 store volatile i32 %nine, i32 addrspace(1)* undef
34 store volatile i32 %ten, i32 addrspace(1)* undef
39 ; scratch wave offset: 1
43 ; flat scratch init: 2
44 ; ---------------------
49 ; Because we can't handle re-using the last few input registers as the
50 ; special vcc etc. registers (as well as decide to not use the unused
51 ; features when the number of registers is frozen), this ends up using
54 ; XALL-LABEL: {{^}}max_12_sgprs_14_input_sgprs:
55 ; XTOSGPR: SGPRBlocks: 1
56 ; XTOSGPR: NumSGPRsForWavesPerEU: 16
58 ; XTOSMEM: s_mov_b64 s[10:11], s[2:3]
59 ; XTOSMEM: s_mov_b64 s[8:9], s[0:1]
60 ; XTOSMEM: s_mov_b32 s7, s13
62 ; XTOSMEM: SGPRBlocks: 1
63 ; XTOSMEM: NumSGPRsForWavesPerEU: 16
65 ; This test case is disabled: When calculating the spillslot addresses AMDGPU
66 ; creates an extra vreg to save/restore m0 which in a point of maximum register
67 ; pressure would trigger an endless loop; the compiler aborts earlier with
68 ; "Incomplete scavenging after 2nd pass" in practice.
69 ;define amdgpu_kernel void @max_12_sgprs_14_input_sgprs(i32 addrspace(1)* %out1,
70 ; i32 addrspace(1)* %out2,
71 ; i32 addrspace(1)* %out3,
72 ; i32 addrspace(1)* %out4,
73 ; i32 %one, i32 %two, i32 %three, i32 %four) #2 {
74 ; %x.0 = call i32 @llvm.amdgcn.workgroup.id.x()
75 ; %x.1 = call i32 @llvm.amdgcn.workgroup.id.y()
76 ; %x.2 = call i32 @llvm.amdgcn.workgroup.id.z()
77 ; %x.3 = call i64 @llvm.amdgcn.dispatch.id()
78 ; %x.4 = call i8 addrspace(4)* @llvm.amdgcn.dispatch.ptr()
79 ; %x.5 = call i8 addrspace(4)* @llvm.amdgcn.queue.ptr()
80 ; store volatile i32 0, i32* undef
84 ; store volatile i32 %x.0, i32 addrspace(1)* undef
85 ; store volatile i32 %x.0, i32 addrspace(1)* undef
86 ; store volatile i32 %x.0, i32 addrspace(1)* undef
87 ; store volatile i64 %x.3, i64 addrspace(1)* undef
88 ; store volatile i8 addrspace(4)* %x.4, i8 addrspace(4)* addrspace(1)* undef
89 ; store volatile i8 addrspace(4)* %x.5, i8 addrspace(4)* addrspace(1)* undef
91 ; store i32 %one, i32 addrspace(1)* %out1
92 ; store i32 %two, i32 addrspace(1)* %out2
93 ; store i32 %three, i32 addrspace(1)* %out3
94 ; store i32 %four, i32 addrspace(1)* %out4
98 ; The following test is commented out for now; http://llvm.org/PR31230
99 ; XALL-LABEL: max_12_sgprs_12_input_sgprs{{$}}
100 ; ; Make sure copies for input buffer are not clobbered. This requires
101 ; ; swapping the order the registers are copied from what normally
104 ; XTOSMEM: s_mov_b32 s5, s11
105 ; XTOSMEM: s_add_u32 m0, s5,
106 ; XTOSMEM: s_buffer_store_dword vcc_lo, s[0:3], m0
108 ; XALL: SGPRBlocks: 2
109 ; XALL: NumSGPRsForWavesPerEU: 18
110 ;define amdgpu_kernel void @max_12_sgprs_12_input_sgprs(i32 addrspace(1)* %out1,
111 ; i32 addrspace(1)* %out2,
112 ; i32 addrspace(1)* %out3,
113 ; i32 addrspace(1)* %out4,
114 ; i32 %one, i32 %two, i32 %three, i32 %four) #2 {
115 ; store volatile i32 0, i32* undef
116 ; %x.0 = call i32 @llvm.amdgcn.workgroup.id.x()
117 ; store volatile i32 %x.0, i32 addrspace(1)* undef
118 ; %x.1 = call i32 @llvm.amdgcn.workgroup.id.y()
119 ; store volatile i32 %x.0, i32 addrspace(1)* undef
120 ; %x.2 = call i32 @llvm.amdgcn.workgroup.id.z()
121 ; store volatile i32 %x.0, i32 addrspace(1)* undef
122 ; %x.3 = call i64 @llvm.amdgcn.dispatch.id()
123 ; store volatile i64 %x.3, i64 addrspace(1)* undef
124 ; %x.4 = call i8 addrspace(4)* @llvm.amdgcn.dispatch.ptr()
125 ; store volatile i8 addrspace(4)* %x.4, i8 addrspace(4)* addrspace(1)* undef
127 ; store i32 %one, i32 addrspace(1)* %out1
128 ; store i32 %two, i32 addrspace(1)* %out2
129 ; store i32 %three, i32 addrspace(1)* %out3
130 ; store i32 %four, i32 addrspace(1)* %out4
134 declare i32 @llvm.amdgcn.workgroup.id.x() #1
135 declare i32 @llvm.amdgcn.workgroup.id.y() #1
136 declare i32 @llvm.amdgcn.workgroup.id.z() #1
137 declare i64 @llvm.amdgcn.dispatch.id() #1
138 declare i8 addrspace(4)* @llvm.amdgcn.dispatch.ptr() #1
139 declare i8 addrspace(4)* @llvm.amdgcn.queue.ptr() #1
141 attributes #0 = { nounwind "amdgpu-num-sgpr"="14" }
142 attributes #1 = { nounwind readnone }
143 attributes #2 = { nounwind "amdgpu-num-sgpr"="12" }
144 attributes #3 = { nounwind "amdgpu-num-sgpr"="11" }