1 ; RUN: llc -mtriple=amdgcn -mcpu=tahiti -verify-machineinstrs -simplifycfg-require-and-preserve-domtree=1 < %s | FileCheck -check-prefix=GCN %s
2 ; RUN: llc -mtriple=amdgcn -mcpu=tonga -verify-machineinstrs -simplifycfg-require-and-preserve-domtree=1 < %s | FileCheck -check-prefix=GCN %s
4 ; This should end with an no-op sequence of exec mask manipulations
5 ; Mask should be in original state after executed unreachable block
8 ; GCN-LABEL: {{^}}uniform_br_trivial_ret_divergent_br_trivial_unreachable:
9 ; GCN: s_cbranch_scc1 [[RET_BB:.LBB[0-9]+_[0-9]+]]
13 ; GCN: s_and_saveexec_b64 [[SAVE_EXEC:s\[[0-9]+:[0-9]+\]]], vcc
15 ; GCN: ; %bb.{{[0-9]+}}: ; %unreachable.bb
16 ; GCN-NEXT: ; divergent unreachable
18 ; GCN-NEXT: ; %bb.{{[0-9]+}}: ; %Flow
19 ; GCN-NEXT: s_or_b64 exec, exec
21 ; GCN-NEXT: [[RET_BB]]:
23 ; GCN-NEXT: .Lfunc_end0
24 define amdgpu_ps <{ i32, i32, i32, i32, i32, i32, i32, i32, i32, float, float, float, float, float, float, float, float, float, float, float, float, float, float }> @uniform_br_trivial_ret_divergent_br_trivial_unreachable(ptr addrspace(4) inreg %arg, ptr addrspace(4) inreg %arg1, ptr addrspace(4) inreg %arg2, ptr addrspace(4) inreg %arg3, float inreg %arg4, i32 inreg %arg5, <2 x i32> %arg6, <2 x i32> %arg7, <2 x i32> %arg8, <3 x i32> %arg9, <2 x i32> %arg10, <2 x i32> %arg11, <2 x i32> %arg12, float %arg13, float %arg14, float %arg15, float %arg16, i32 inreg %arg17, i32 %arg18, i32 %arg19, float %arg20, i32 %arg21) #0 {
26 %i.i = extractelement <2 x i32> %arg7, i32 0
27 %j.i = extractelement <2 x i32> %arg7, i32 1
28 %i.f.i = bitcast i32 %i.i to float
29 %j.f.i = bitcast i32 %j.i to float
30 %p1.i = call float @llvm.amdgcn.interp.p1(float %i.f.i, i32 1, i32 0, i32 %arg5) #2
31 %p2 = call float @llvm.amdgcn.interp.p2(float %p1.i, float %j.f.i, i32 1, i32 0, i32 %arg5) #2
32 %p87 = fmul float %p2, %p2
33 %p88 = fadd float %p87, %p87
34 %p93 = fadd float %p88, %p88
35 %p97 = fmul float %p93, %p93
36 %p102 = fsub float %p97, %p97
37 %p104 = fmul float %p102, %p102
38 %p106 = fadd float 0.000000e+00, %p104
39 %p108 = fadd float %p106, %p106
40 %uniform.cond = icmp slt i32 %arg17, 0
41 br i1 %uniform.cond, label %ret.bb, label %else
43 else: ; preds = %main_body
44 %p124 = fmul float %p108, %p108
45 %p125 = fsub float %p124, %p124
46 %divergent.cond = fcmp olt float %p125, 0.000000e+00
47 br i1 %divergent.cond, label %ret.bb, label %unreachable.bb
49 unreachable.bb: ; preds = %else
52 ret.bb: ; preds = %else, %main_body
53 ret <{ i32, i32, i32, i32, i32, i32, i32, i32, i32, float, float, float, float, float, float, float, float, float, float, float, float, float, float }> undef
56 ; GCN-LABEL: {{^}}uniform_br_nontrivial_ret_divergent_br_nontrivial_unreachable:
59 ; GCN: ; %bb.{{[0-9]+}}: ; %Flow
60 ; GCN: s_cbranch_execnz [[RETURN:.LBB[0-9]+_[0-9]+]]
62 ; GCN: ; %UnifiedReturnBlock
63 ; GCN-NEXT: s_or_b64 exec, exec
66 ; GCN: .LBB{{[0-9]+_[0-9]+}}: ; %else
67 ; GCN: s_and_saveexec_b64 [[SAVE_EXEC:s\[[0-9]+:[0-9]+\]]], vcc
69 ; GCN-NEXT: ; %unreachable.bb
71 ; GCN: ; divergent unreachable
75 define amdgpu_ps <{ i32, i32, i32, i32, i32, i32, i32, i32, i32, float, float, float, float, float, float, float, float, float, float, float, float, float, float }> @uniform_br_nontrivial_ret_divergent_br_nontrivial_unreachable(ptr addrspace(4) inreg %arg, ptr addrspace(4) inreg %arg1, ptr addrspace(4) inreg %arg2, ptr addrspace(4) inreg %arg3, float inreg %arg4, i32 inreg %arg5, <2 x i32> %arg6, <2 x i32> %arg7, <2 x i32> %arg8, <3 x i32> %arg9, <2 x i32> %arg10, <2 x i32> %arg11, <2 x i32> %arg12, float %arg13, float %arg14, float %arg15, float %arg16, float %arg17, i32 inreg %arg18, i32 %arg19, float %arg20, i32 %arg21) #0 {
77 %i.i = extractelement <2 x i32> %arg7, i32 0
78 %j.i = extractelement <2 x i32> %arg7, i32 1
79 %i.f.i = bitcast i32 %i.i to float
80 %j.f.i = bitcast i32 %j.i to float
81 %p1.i = call float @llvm.amdgcn.interp.p1(float %i.f.i, i32 1, i32 0, i32 %arg5) #2
82 %p2 = call float @llvm.amdgcn.interp.p2(float %p1.i, float %j.f.i, i32 1, i32 0, i32 %arg5) #2
83 %p87 = fmul float %p2, %p2
84 %p88 = fadd float %p87, %p87
85 %p93 = fadd float %p88, %p88
86 %p97 = fmul float %p93, %p93
87 %p102 = fsub float %p97, %p97
88 %p104 = fmul float %p102, %p102
89 %p106 = fadd float 0.000000e+00, %p104
90 %p108 = fadd float %p106, %p106
91 %uniform.cond = icmp slt i32 %arg18, 0
92 br i1 %uniform.cond, label %ret.bb, label %else
94 else: ; preds = %main_body
95 %p124 = fmul float %p108, %p108
96 %p125 = fsub float %p124, %p124
97 %divergent.cond = fcmp olt float %p125, 0.000000e+00
98 br i1 %divergent.cond, label %ret.bb, label %unreachable.bb
100 unreachable.bb: ; preds = %else
101 store volatile i32 8, ptr addrspace(3) undef
104 ret.bb: ; preds = %else, %main_body
105 store volatile i32 11, ptr addrspace(1) undef
106 ret <{ i32, i32, i32, i32, i32, i32, i32, i32, i32, float, float, float, float, float, float, float, float, float, float, float, float, float, float }> undef
109 ; Function Attrs: nounwind readnone
110 declare float @llvm.amdgcn.interp.p1(float, i32, i32, i32) #1
112 ; Function Attrs: nounwind readnone
113 declare float @llvm.amdgcn.interp.p2(float, float, i32, i32, i32) #1
115 ; Function Attrs: nounwind readnone
116 declare float @llvm.amdgcn.interp.mov(i32, i32, i32, i32) #1
118 ; Function Attrs: nounwind readnone
119 declare float @llvm.fabs.f32(float) #1
121 ; Function Attrs: nounwind readnone
122 declare float @llvm.sqrt.f32(float) #1
124 ; Function Attrs: nounwind readnone
125 declare float @llvm.floor.f32(float) #1
127 attributes #0 = { "InitialPSInputAddr"="36983" }
128 attributes #1 = { nounwind readnone }
129 attributes #2 = { nounwind }