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llvm-mirror/test/CodeGen/AMDGPU/skip-if-dead.ll
Matt Arsenault f4454532b0 AMDGPU: Remove llvm.AMDGPU.kill 
This is the last of the old AMDGPU intrinsics.

llvm-svn: 348615
2018-12-07 17:46:16 +00:00

406 lines
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LLVM
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; RUN: llc -march=amdgcn -verify-machineinstrs < %s | FileCheck %s
; CHECK-LABEL: {{^}}test_kill_depth_0_imm_pos:
; CHECK-NEXT: ; %bb.0:
; CHECK-NEXT: ; %bb.1:
; CHECK-NEXT: s_endpgm
define amdgpu_ps void @test_kill_depth_0_imm_pos() #0 {
call void @llvm.amdgcn.kill(i1 true)
ret void
}
; CHECK-LABEL: {{^}}test_kill_depth_0_imm_neg:
; CHECK-NEXT: ; %bb.0:
; CHECK-NEXT: s_mov_b64 exec, 0
; CHECK-NEXT: ; %bb.1:
; CHECK-NEXT: s_endpgm
define amdgpu_ps void @test_kill_depth_0_imm_neg() #0 {
call void @llvm.amdgcn.kill(i1 false)
ret void
}
; FIXME: Ideally only one would be emitted
; CHECK-LABEL: {{^}}test_kill_depth_0_imm_neg_x2:
; CHECK-NEXT: ; %bb.0:
; CHECK-NEXT: s_mov_b64 exec, 0
; CHECK-NEXT: ; %bb.1:
; CHECK-NEXT: s_mov_b64 exec, 0
; CHECK-NEXT: ; %bb.2:
; CHECK-NEXT: s_endpgm
define amdgpu_ps void @test_kill_depth_0_imm_neg_x2() #0 {
call void @llvm.amdgcn.kill(i1 false)
call void @llvm.amdgcn.kill(i1 false)
ret void
}
; CHECK-LABEL: {{^}}test_kill_depth_var:
; CHECK-NEXT: ; %bb.0:
; CHECK-NEXT: v_cmpx_gt_f32_e32 vcc, 0, v0
; CHECK-NEXT: ; %bb.1:
; CHECK-NEXT: s_endpgm
define amdgpu_ps void @test_kill_depth_var(float %x) #0 {
%cmp = fcmp olt float %x, 0.0
call void @llvm.amdgcn.kill(i1 %cmp)
ret void
}
; FIXME: Ideally only one would be emitted
; CHECK-LABEL: {{^}}test_kill_depth_var_x2_same:
; CHECK-NEXT: ; %bb.0:
; CHECK-NEXT: v_cmpx_gt_f32_e32 vcc, 0, v0
; CHECK-NEXT: ; %bb.1:
; CHECK-NEXT: v_cmpx_gt_f32_e32 vcc, 0, v0
; CHECK-NEXT: ; %bb.2:
; CHECK-NEXT: s_endpgm
define amdgpu_ps void @test_kill_depth_var_x2_same(float %x) #0 {
%cmp = fcmp olt float %x, 0.0
call void @llvm.amdgcn.kill(i1 %cmp)
call void @llvm.amdgcn.kill(i1 %cmp)
ret void
}
; CHECK-LABEL: {{^}}test_kill_depth_var_x2:
; CHECK-NEXT: ; %bb.0:
; CHECK-NEXT: v_cmpx_gt_f32_e32 vcc, 0, v0
; CHECK-NEXT: ; %bb.1:
; CHECK-NEXT: v_cmpx_gt_f32_e32 vcc, 0, v1
; CHECK-NEXT: ; %bb.2:
; CHECK-NEXT: s_endpgm
define amdgpu_ps void @test_kill_depth_var_x2(float %x, float %y) #0 {
%cmp.x = fcmp olt float %x, 0.0
call void @llvm.amdgcn.kill(i1 %cmp.x)
%cmp.y = fcmp olt float %y, 0.0
call void @llvm.amdgcn.kill(i1 %cmp.y)
ret void
}
; CHECK-LABEL: {{^}}test_kill_depth_var_x2_instructions:
; CHECK-NEXT: ; %bb.0:
; CHECK-NEXT: v_cmpx_gt_f32_e32 vcc, 0, v0
; CHECK-NEXT: s_cbranch_execnz BB6_2
; CHECK-NEXT: ; %bb.1:
; CHECK-NEXT: exp
; CHECK-NEXT: s_endpgm
; CHECK-NEXT: BB6_2:
; CHECK: v_mov_b32_e64 v7, -1
; CHECK: v_cmpx_gt_f32_e32 vcc, 0, v7
; CHECK-NEXT: s_cbranch_execnz BB6_4
; CHECK-NEXT: ; %bb.3:
; CHECK-NEXT: exp
; CHECK-NEXT: s_endpgm
; CHECK-NEXT: BB6_4:
; CHECK-NEXT: s_endpgm
define amdgpu_ps void @test_kill_depth_var_x2_instructions(float %x) #0 {
%cmp.x = fcmp olt float %x, 0.0
call void @llvm.amdgcn.kill(i1 %cmp.x)
%y = call float asm sideeffect "v_mov_b32_e64 v7, -1", "={v7}"()
%cmp.y = fcmp olt float %y, 0.0
call void @llvm.amdgcn.kill(i1 %cmp.y)
ret void
}
; FIXME: why does the skip depend on the asm length in the same block?
; CHECK-LABEL: {{^}}test_kill_control_flow:
; CHECK: s_cmp_lg_u32 s{{[0-9]+}}, 0
; CHECK: s_cbranch_scc1 [[RETURN_BB:BB[0-9]+_[0-9]+]]
; CHECK-NEXT: ; %bb.1:
; CHECK: v_mov_b32_e64 v7, -1
; CHECK: v_nop_e64
; CHECK: v_nop_e64
; CHECK: v_nop_e64
; CHECK: v_nop_e64
; CHECK: v_nop_e64
; CHECK: v_nop_e64
; CHECK: v_nop_e64
; CHECK: v_nop_e64
; CHECK: v_nop_e64
; CHECK: v_nop_e64
; CHECK: v_cmpx_gt_f32_e32 vcc, 0, v7
; CHECK-NEXT: s_cbranch_execnz [[SPLIT_BB:BB[0-9]+_[0-9]+]]
; CHECK-NEXT: ; %bb.2:
; CHECK-NEXT: exp null off, off, off, off done vm
; CHECK-NEXT: s_endpgm
; CHECK-NEXT: {{^}}[[SPLIT_BB]]:
; CHECK-NEXT: s_endpgm
define amdgpu_ps void @test_kill_control_flow(i32 inreg %arg) #0 {
entry:
%cmp = icmp eq i32 %arg, 0
br i1 %cmp, label %bb, label %exit
bb:
%var = call float asm sideeffect "
v_mov_b32_e64 v7, -1
v_nop_e64
v_nop_e64
v_nop_e64
v_nop_e64
v_nop_e64
v_nop_e64
v_nop_e64
v_nop_e64
v_nop_e64
v_nop_e64", "={v7}"()
%cmp.var = fcmp olt float %var, 0.0
call void @llvm.amdgcn.kill(i1 %cmp.var)
br label %exit
exit:
ret void
}
; CHECK-LABEL: {{^}}test_kill_control_flow_remainder:
; CHECK: s_cmp_lg_u32 s{{[0-9]+}}, 0
; CHECK-NEXT: v_mov_b32_e32 v{{[0-9]+}}, 0
; CHECK-NEXT: s_cbranch_scc1 [[RETURN_BB:BB[0-9]+_[0-9]+]]
; CHECK-NEXT: ; %bb.1: ; %bb
; CHECK: v_mov_b32_e64 v7, -1
; CHECK: v_nop_e64
; CHECK: v_nop_e64
; CHECK: v_nop_e64
; CHECK: v_nop_e64
; CHECK: v_nop_e64
; CHECK: v_nop_e64
; CHECK: v_nop_e64
; CHECK: v_nop_e64
; CHECK: ;;#ASMEND
; CHECK: v_mov_b32_e64 v8, -1
; CHECK: ;;#ASMEND
; CHECK: v_cmpx_gt_f32_e32 vcc, 0, v7
; CHECK-NEXT: s_cbranch_execnz [[SPLIT_BB:BB[0-9]+_[0-9]+]]
; CHECK-NEXT: ; %bb.2:
; CHECK-NEXT: exp null off, off, off, off done vm
; CHECK-NEXT: s_endpgm
; CHECK-NEXT: {{^}}[[SPLIT_BB]]:
; CHECK: buffer_store_dword v8
; CHECK: v_mov_b32_e64 v9, -2
; CHECK: {{^}}BB{{[0-9]+_[0-9]+}}:
; CHECK: buffer_store_dword v9
; CHECK-NEXT: s_endpgm
define amdgpu_ps void @test_kill_control_flow_remainder(i32 inreg %arg) #0 {
entry:
%cmp = icmp eq i32 %arg, 0
br i1 %cmp, label %bb, label %exit
bb:
%var = call float asm sideeffect "
v_mov_b32_e64 v7, -1
v_nop_e64
v_nop_e64
v_nop_e64
v_nop_e64
v_nop_e64
v_nop_e64
v_nop_e64
v_nop_e64
v_nop_e64
v_nop_e64
v_nop_e64", "={v7}"()
%live.across = call float asm sideeffect "v_mov_b32_e64 v8, -1", "={v8}"()
%cmp.var = fcmp olt float %var, 0.0
call void @llvm.amdgcn.kill(i1 %cmp.var)
store volatile float %live.across, float addrspace(1)* undef
%live.out = call float asm sideeffect "v_mov_b32_e64 v9, -2", "={v9}"()
br label %exit
exit:
%phi = phi float [ 0.0, %entry ], [ %live.out, %bb ]
store float %phi, float addrspace(1)* undef
ret void
}
; CHECK-LABEL: {{^}}test_kill_divergent_loop:
; CHECK: v_cmp_eq_u32_e32 vcc, 0, v0
; CHECK-NEXT: s_and_saveexec_b64 [[SAVEEXEC:s\[[0-9]+:[0-9]+\]]], vcc
; CHECK-NEXT: s_xor_b64 [[SAVEEXEC]], exec, [[SAVEEXEC]]
; CHECK-NEXT: ; mask branch [[EXIT:BB[0-9]+_[0-9]+]]
; CHECK-NEXT: s_cbranch_execz [[EXIT]]
; CHECK: {{BB[0-9]+_[0-9]+}}: ; %bb.preheader
; CHECK: s_mov_b32
; CHECK: [[LOOP_BB:BB[0-9]+_[0-9]+]]:
; CHECK: v_mov_b32_e64 v7, -1
; CHECK: v_nop_e64
; CHECK: v_cmpx_gt_f32_e32 vcc, 0, v7
; CHECK-NEXT: ; %bb.3:
; CHECK: buffer_load_dword [[LOAD:v[0-9]+]]
; CHECK: v_cmp_eq_u32_e32 vcc, 0, [[LOAD]]
; CHECK-NEXT: s_and_b64 vcc, exec, vcc
; CHECK-NEXT: s_cbranch_vccnz [[LOOP_BB]]
; CHECK-NEXT: {{^}}[[EXIT]]:
; CHECK: s_or_b64 exec, exec, [[SAVEEXEC]]
; CHECK: buffer_store_dword
; CHECK: s_endpgm
define amdgpu_ps void @test_kill_divergent_loop(i32 %arg) #0 {
entry:
%cmp = icmp eq i32 %arg, 0
br i1 %cmp, label %bb, label %exit
bb:
%var = call float asm sideeffect "
v_mov_b32_e64 v7, -1
v_nop_e64
v_nop_e64
v_nop_e64
v_nop_e64
v_nop_e64
v_nop_e64
v_nop_e64
v_nop_e64
v_nop_e64
v_nop_e64", "={v7}"()
%cmp.var = fcmp olt float %var, 0.0
call void @llvm.amdgcn.kill(i1 %cmp.var)
%vgpr = load volatile i32, i32 addrspace(1)* undef
%loop.cond = icmp eq i32 %vgpr, 0
br i1 %loop.cond, label %bb, label %exit
exit:
store volatile i32 8, i32 addrspace(1)* undef
ret void
}
; bug 28550
; CHECK-LABEL: {{^}}phi_use_def_before_kill:
; CHECK: v_cndmask_b32_e64 [[PHIREG:v[0-9]+]], 0, -1.0,
; CHECK: v_cmpx_lt_f32_e32 vcc, 0,
; CHECK-NEXT: s_cbranch_execnz [[BB4:BB[0-9]+_[0-9]+]]
; CHECK: exp
; CHECK-NEXT: s_endpgm
; CHECK: [[KILLBB:BB[0-9]+_[0-9]+]]:
; CHECK-NEXT: s_cbranch_scc0 [[PHIBB:BB[0-9]+_[0-9]+]]
; CHECK: [[PHIBB]]:
; CHECK: v_cmp_eq_f32_e32 vcc, 0, [[PHIREG]]
; CHECK: s_cbranch_vccz [[ENDBB:BB[0-9]+_[0-9]+]]
; CHECK: ; %bb10
; CHECK: v_mov_b32_e32 v{{[0-9]+}}, 9
; CHECK: buffer_store_dword
; CHECK: [[ENDBB]]:
; CHECK-NEXT: s_endpgm
define amdgpu_ps void @phi_use_def_before_kill(float inreg %x) #0 {
bb:
%tmp = fadd float %x, 1.000000e+00
%tmp1 = fcmp olt float 0.000000e+00, %tmp
%tmp2 = select i1 %tmp1, float -1.000000e+00, float 0.000000e+00
%cmp.tmp2 = fcmp olt float %tmp2, 0.0
call void @llvm.amdgcn.kill(i1 %cmp.tmp2)
br i1 undef, label %phibb, label %bb8
phibb:
%tmp5 = phi float [ %tmp2, %bb ], [ 4.0, %bb8 ]
%tmp6 = fcmp oeq float %tmp5, 0.000000e+00
br i1 %tmp6, label %bb10, label %end
bb8:
store volatile i32 8, i32 addrspace(1)* undef
br label %phibb
bb10:
store volatile i32 9, i32 addrspace(1)* undef
br label %end
end:
ret void
}
; CHECK-LABEL: {{^}}no_skip_no_successors:
; CHECK: v_cmp_nge_f32
; CHECK: s_cbranch_vccz [[SKIPKILL:BB[0-9]+_[0-9]+]]
; CHECK: ; %bb6
; CHECK: s_mov_b64 exec, 0
; CHECK: [[SKIPKILL]]:
; CHECK: v_cmp_nge_f32_e32 vcc
; CHECK: %bb.3: ; %bb5
; CHECK-NEXT: .Lfunc_end{{[0-9]+}}
define amdgpu_ps void @no_skip_no_successors(float inreg %arg, float inreg %arg1) #0 {
bb:
%tmp = fcmp ult float %arg1, 0.000000e+00
%tmp2 = fcmp ult float %arg, 0x3FCF5C2900000000
br i1 %tmp, label %bb6, label %bb3
bb3: ; preds = %bb
br i1 %tmp2, label %bb5, label %bb4
bb4: ; preds = %bb3
br i1 true, label %bb5, label %bb7
bb5: ; preds = %bb4, %bb3
unreachable
bb6: ; preds = %bb
call void @llvm.amdgcn.kill(i1 false)
unreachable
bb7: ; preds = %bb4
ret void
}
; CHECK-LABEL: {{^}}if_after_kill_block:
; CHECK: ; %bb.0:
; CHECK: s_and_saveexec_b64
; CHECK: s_xor_b64
; CHECK-NEXT: mask branch [[BB4:BB[0-9]+_[0-9]+]]
; CHECK: v_cmpx_gt_f32_e32 vcc, 0,
; CHECK: [[BB4]]:
; CHECK: s_or_b64 exec, exec
; CHECK: image_sample_c
; CHECK: v_cmp_neq_f32_e32 vcc, 0,
; CHECK: s_and_saveexec_b64 s{{\[[0-9]+:[0-9]+\]}}, vcc
; CHECK: mask branch [[END:BB[0-9]+_[0-9]+]]
; CHECK-NOT: branch
; CHECK: BB{{[0-9]+_[0-9]+}}: ; %bb8
; CHECK: buffer_store_dword
; CHECK: [[END]]:
; CHECK: s_endpgm
define amdgpu_ps void @if_after_kill_block(float %arg, float %arg1, float %arg2, float %arg3) #0 {
bb:
%tmp = fcmp ult float %arg1, 0.000000e+00
br i1 %tmp, label %bb3, label %bb4
bb3: ; preds = %bb
%cmp.arg = fcmp olt float %arg, 0.0
call void @llvm.amdgcn.kill(i1 %cmp.arg)
br label %bb4
bb4: ; preds = %bb3, %bb
%tmp5 = call <4 x float> @llvm.amdgcn.image.sample.c.1d.v4f32.f32(i32 16, float %arg2, float %arg3, <8 x i32> undef, <4 x i32> undef, i1 0, i32 0, i32 0)
%tmp6 = extractelement <4 x float> %tmp5, i32 0
%tmp7 = fcmp une float %tmp6, 0.000000e+00
br i1 %tmp7, label %bb8, label %bb9
bb8: ; preds = %bb9, %bb4
store volatile i32 9, i32 addrspace(1)* undef
ret void
bb9: ; preds = %bb4
ret void
}
declare <4 x float> @llvm.amdgcn.image.sample.c.1d.v4f32.f32(i32, float, float, <8 x i32>, <4 x i32>, i1, i32, i32) #1
declare void @llvm.amdgcn.kill(i1) #0
attributes #0 = { nounwind }
attributes #1 = { nounwind readonly }
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