1 ; RUN: llc -march=amdgcn -mcpu=tahiti -verify-machineinstrs < %s | FileCheck %s
2 ; RUN: llc -march=amdgcn -mcpu=tahiti -verify-machineinstrs -early-live-intervals < %s | FileCheck %s
4 ; CHECK-LABEL: {{^}}fold_sgpr:
5 ; CHECK: v_add_i32_e32 v{{[0-9]+}}, vcc, s
6 define amdgpu_kernel void @fold_sgpr(ptr addrspace(1) %out, i32 %fold) #1 {
8 %tmp0 = icmp ne i32 %fold, 0
9 br i1 %tmp0, label %if, label %endif
12 %id = call i32 @llvm.amdgcn.workitem.id.x()
13 %offset = add i32 %fold, %id
14 %tmp1 = getelementptr i32, ptr addrspace(1) %out, i32 %offset
15 store i32 0, ptr addrspace(1) %tmp1
22 ; CHECK-LABEL: {{^}}fold_imm:
23 ; CHECK: v_or_b32_e32 v{{[0-9]+}}, 5
24 define amdgpu_kernel void @fold_imm(ptr addrspace(1) %out, i32 %cmp) #1 {
27 %tmp0 = icmp ne i32 %cmp, 0
28 br i1 %tmp0, label %if, label %endif
31 %id = call i32 @llvm.amdgcn.workitem.id.x()
32 %val = or i32 %id, %fold
33 store i32 %val, ptr addrspace(1) %out
40 ; CHECK-LABEL: {{^}}fold_64bit_constant_add:
41 ; CHECK-NOT: s_mov_b64
42 ; FIXME: It would be better if we could use v_add here and drop the extra
43 ; v_mov_b32 instructions.
44 ; CHECK-DAG: s_add_u32 [[LO:s[0-9]+]], s{{[0-9]+}}, 1
45 ; CHECK-DAG: s_addc_u32 [[HI:s[0-9]+]], s{{[0-9]+}}, 0
46 ; CHECK-DAG: v_mov_b32_e32 v[[VLO:[0-9]+]], [[LO]]
47 ; CHECK-DAG: v_mov_b32_e32 v[[VHI:[0-9]+]], [[HI]]
48 ; CHECK: buffer_store_dwordx2 v[[[VLO]]:[[VHI]]],
50 define amdgpu_kernel void @fold_64bit_constant_add(ptr addrspace(1) %out, i32 %cmp, i64 %val) #1 {
52 %tmp0 = add i64 %val, 1
53 store i64 %tmp0, ptr addrspace(1) %out
57 ; Inline constants should always be folded.
59 ; CHECK-LABEL: {{^}}vector_inline:
60 ; CHECK: v_xor_b32_e32 v{{[0-9]+}}, 5, v{{[0-9]+}}
61 ; CHECK: v_xor_b32_e32 v{{[0-9]+}}, 5, v{{[0-9]+}}
62 ; CHECK: v_xor_b32_e32 v{{[0-9]+}}, 5, v{{[0-9]+}}
63 ; CHECK: v_xor_b32_e32 v{{[0-9]+}}, 5, v{{[0-9]+}}
65 define amdgpu_kernel void @vector_inline(ptr addrspace(1) %out) #1 {
67 %tmp0 = call i32 @llvm.amdgcn.workitem.id.x()
68 %tmp1 = add i32 %tmp0, 1
69 %tmp2 = add i32 %tmp0, 2
70 %tmp3 = add i32 %tmp0, 3
71 %vec0 = insertelement <4 x i32> undef, i32 %tmp0, i32 0
72 %vec1 = insertelement <4 x i32> %vec0, i32 %tmp1, i32 1
73 %vec2 = insertelement <4 x i32> %vec1, i32 %tmp2, i32 2
74 %vec3 = insertelement <4 x i32> %vec2, i32 %tmp3, i32 3
75 %tmp4 = xor <4 x i32> <i32 5, i32 5, i32 5, i32 5>, %vec3
76 store <4 x i32> %tmp4, ptr addrspace(1) %out
80 ; Immediates with one use should be folded
81 ; CHECK-LABEL: {{^}}imm_one_use:
82 ; CHECK: v_xor_b32_e32 v{{[0-9]+}}, 0x64, v{{[0-9]+}}
84 define amdgpu_kernel void @imm_one_use(ptr addrspace(1) %out) #1 {
86 %tmp0 = call i32 @llvm.amdgcn.workitem.id.x()
87 %tmp1 = xor i32 %tmp0, 100
88 store i32 %tmp1, ptr addrspace(1) %out
91 ; CHECK-LABEL: {{^}}vector_imm:
92 ; CHECK: v_xor_b32_e32 v{{[0-9]}}, 0x64, v{{[0-9]}}
93 ; CHECK: v_xor_b32_e32 v{{[0-9]}}, 0x64, v{{[0-9]}}
94 ; CHECK: v_xor_b32_e32 v{{[0-9]}}, 0x64, v{{[0-9]}}
95 ; CHECK: v_xor_b32_e32 v{{[0-9]}}, 0x64, v{{[0-9]}}
97 define amdgpu_kernel void @vector_imm(ptr addrspace(1) %out) #1 {
99 %tmp0 = call i32 @llvm.amdgcn.workitem.id.x()
100 %tmp1 = add i32 %tmp0, 1
101 %tmp2 = add i32 %tmp0, 2
102 %tmp3 = add i32 %tmp0, 3
103 %vec0 = insertelement <4 x i32> undef, i32 %tmp0, i32 0
104 %vec1 = insertelement <4 x i32> %vec0, i32 %tmp1, i32 1
105 %vec2 = insertelement <4 x i32> %vec1, i32 %tmp2, i32 2
106 %vec3 = insertelement <4 x i32> %vec2, i32 %tmp3, i32 3
107 %tmp4 = xor <4 x i32> <i32 100, i32 100, i32 100, i32 100>, %vec3
108 store <4 x i32> %tmp4, ptr addrspace(1) %out
112 ; A subregister use operand should not be tied.
113 ; CHECK-LABEL: {{^}}no_fold_tied_subregister:
114 ; CHECK: buffer_load_dwordx2 v[[[LO:[0-9]+]]:[[HI:[0-9]+]]]
115 ; CHECK: v_madmk_f32 v[[RES:[0-9]+]], v[[HI]], 0x41200000, v[[LO]]
116 ; CHECK: buffer_store_dword v[[RES]]
117 define amdgpu_kernel void @no_fold_tied_subregister() #1 {
118 %tmp1 = load volatile <2 x float>, ptr addrspace(1) undef
119 %tmp2 = extractelement <2 x float> %tmp1, i32 0
120 %tmp3 = extractelement <2 x float> %tmp1, i32 1
121 %tmp4 = fmul float %tmp3, 10.0
122 %tmp5 = fadd float %tmp4, %tmp2
123 store volatile float %tmp5, ptr addrspace(1) undef
127 ; There should be exact one folding on the same operand.
128 ; CHECK-LABEL: {{^}}no_extra_fold_on_same_opnd
130 ; CHECK: v_xor_b32_e32 v{{[0-9]+}}, v{{[0-9]+}}, v{{[0-9]+}}
131 define void @no_extra_fold_on_same_opnd() #1 {
133 %s0 = load i32, ptr addrspace(5) undef, align 4
134 %s0.i64= zext i32 %s0 to i64
135 br label %for.body.i.i
138 %s1 = load i32, ptr addrspace(1) undef, align 8
139 %s1.i64 = sext i32 %s1 to i64
140 %xor = xor i64 %s1.i64, %s0.i64
141 %flag = icmp ult i64 %xor, 8
142 br i1 %flag, label %if.then, label %if.else
151 declare i32 @llvm.amdgcn.workitem.id.x() #0
153 attributes #0 = { nounwind readnone }
154 attributes #1 = { nounwind "denormal-fp-math-f32"="preserve-sign,preserve-sign" }