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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: llc -mtriple=amdgcn -simplifycfg-require-and-preserve-domtree=1 < %s | FileCheck -check-prefix=SI %s
; RUN: opt -mtriple=amdgcn-- -S -amdgpu-unify-divergent-exit-nodes -verify -simplifycfg-require-and-preserve-domtree=1 %s | FileCheck -check-prefix=IR %s
define amdgpu_kernel void @infinite_loop(ptr addrspace(1) %out) {
; SI-LABEL: infinite_loop:
; SI: ; %bb.0: ; %entry
; SI-NEXT: s_load_dwordx2 s[0:1], s[4:5], 0x9
; SI-NEXT: s_mov_b32 s3, 0xf000
; SI-NEXT: s_mov_b32 s2, -1
; SI-NEXT: v_mov_b32_e32 v0, 0x3e7
; SI-NEXT: s_and_b64 vcc, exec, -1
; SI-NEXT: .LBB0_1: ; %loop
; SI-NEXT: ; =>This Inner Loop Header: Depth=1
; SI-NEXT: s_waitcnt lgkmcnt(0)
; SI-NEXT: buffer_store_dword v0, off, s[0:3], 0
; SI-NEXT: s_waitcnt vmcnt(0)
; SI-NEXT: s_mov_b64 vcc, vcc
; SI-NEXT: s_cbranch_vccnz .LBB0_1
; SI-NEXT: ; %bb.2: ; %DummyReturnBlock
; SI-NEXT: s_endpgm
; IR-LABEL: @infinite_loop(
; IR-NEXT: entry:
; IR-NEXT: br label [[LOOP:%.*]]
; IR: loop:
; IR-NEXT: store volatile i32 999, ptr addrspace(1) [[OUT:%.*]], align 4
; IR-NEXT: br i1 true, label [[LOOP]], label [[DUMMYRETURNBLOCK:%.*]]
; IR: DummyReturnBlock:
; IR-NEXT: ret void
;
entry:
br label %loop
loop:
store volatile i32 999, ptr addrspace(1) %out, align 4
br label %loop
}
define amdgpu_kernel void @infinite_loop_ret(ptr addrspace(1) %out) {
; SI-LABEL: infinite_loop_ret:
; SI: ; %bb.0: ; %entry
; SI-NEXT: v_cmp_eq_u32_e32 vcc, 1, v0
; SI-NEXT: s_and_saveexec_b64 s[0:1], vcc
; SI-NEXT: s_cbranch_execz .LBB1_3
; SI-NEXT: ; %bb.1: ; %loop.preheader
; SI-NEXT: s_load_dwordx2 s[0:1], s[4:5], 0x9
; SI-NEXT: s_mov_b32 s3, 0xf000
; SI-NEXT: s_mov_b32 s2, -1
; SI-NEXT: v_mov_b32_e32 v0, 0x3e7
; SI-NEXT: s_and_b64 vcc, exec, -1
; SI-NEXT: .LBB1_2: ; %loop
; SI-NEXT: ; =>This Inner Loop Header: Depth=1
; SI-NEXT: s_waitcnt lgkmcnt(0)
; SI-NEXT: buffer_store_dword v0, off, s[0:3], 0
; SI-NEXT: s_waitcnt vmcnt(0)
; SI-NEXT: s_mov_b64 vcc, vcc
; SI-NEXT: s_cbranch_vccnz .LBB1_2
; SI-NEXT: .LBB1_3: ; %UnifiedReturnBlock
; SI-NEXT: s_endpgm
; IR-LABEL: @infinite_loop_ret(
; IR-NEXT: entry:
; IR-NEXT: [[TMP:%.*]] = tail call i32 @llvm.amdgcn.workitem.id.x()
; IR-NEXT: [[COND:%.*]] = icmp eq i32 [[TMP]], 1
; IR-NEXT: br i1 [[COND]], label [[LOOP:%.*]], label [[UNIFIEDRETURNBLOCK:%.*]]
; IR: loop:
; IR-NEXT: store volatile i32 999, ptr addrspace(1) [[OUT:%.*]], align 4
; IR-NEXT: br i1 true, label [[LOOP]], label [[UNIFIEDRETURNBLOCK]]
; IR: UnifiedReturnBlock:
; IR-NEXT: ret void
;
entry:
%tmp = tail call i32 @llvm.amdgcn.workitem.id.x()
%cond = icmp eq i32 %tmp, 1
br i1 %cond, label %loop, label %return
loop:
store volatile i32 999, ptr addrspace(1) %out, align 4
br label %loop
return:
ret void
}
define amdgpu_kernel void @infinite_loops(ptr addrspace(1) %out) {
; SI-LABEL: infinite_loops:
; SI: ; %bb.0: ; %entry
; SI-NEXT: s_load_dwordx2 s[0:1], s[4:5], 0x9
; SI-NEXT: s_mov_b64 s[2:3], -1
; SI-NEXT: s_cbranch_scc1 .LBB2_4
; SI-NEXT: ; %bb.1:
; SI-NEXT: s_mov_b32 s3, 0xf000
; SI-NEXT: s_mov_b32 s2, -1
; SI-NEXT: v_mov_b32_e32 v0, 0x378
; SI-NEXT: s_and_b64 vcc, exec, -1
; SI-NEXT: .LBB2_2: ; %loop2
; SI-NEXT: ; =>This Inner Loop Header: Depth=1
; SI-NEXT: s_waitcnt lgkmcnt(0)
; SI-NEXT: buffer_store_dword v0, off, s[0:3], 0
; SI-NEXT: s_waitcnt vmcnt(0)
; SI-NEXT: s_mov_b64 vcc, vcc
; SI-NEXT: s_cbranch_vccnz .LBB2_2
; SI-NEXT: ; %bb.3: ; %Flow
; SI-NEXT: s_mov_b64 s[2:3], 0
; SI-NEXT: .LBB2_4: ; %Flow2
; SI-NEXT: s_and_b64 vcc, exec, s[2:3]
; SI-NEXT: s_waitcnt lgkmcnt(0)
; SI-NEXT: s_mov_b64 vcc, vcc
; SI-NEXT: s_cbranch_vccz .LBB2_7
; SI-NEXT: ; %bb.5:
; SI-NEXT: s_mov_b32 s3, 0xf000
; SI-NEXT: s_mov_b32 s2, -1
; SI-NEXT: s_waitcnt expcnt(0)
; SI-NEXT: v_mov_b32_e32 v0, 0x3e7
; SI-NEXT: s_and_b64 vcc, exec, 0
; SI-NEXT: .LBB2_6: ; %loop1
; SI-NEXT: ; =>This Inner Loop Header: Depth=1
; SI-NEXT: buffer_store_dword v0, off, s[0:3], 0
; SI-NEXT: s_waitcnt vmcnt(0)
; SI-NEXT: s_mov_b64 vcc, vcc
; SI-NEXT: s_cbranch_vccz .LBB2_6
; SI-NEXT: .LBB2_7: ; %DummyReturnBlock
; SI-NEXT: s_endpgm
; IR-LABEL: @infinite_loops(
; IR-NEXT: entry:
; IR-NEXT: br i1 poison, label [[LOOP1:%.*]], label [[LOOP2:%.*]]
; IR: loop1:
; IR-NEXT: store volatile i32 999, ptr addrspace(1) [[OUT:%.*]], align 4
; IR-NEXT: br i1 true, label [[LOOP1]], label [[DUMMYRETURNBLOCK:%.*]]
; IR: loop2:
; IR-NEXT: store volatile i32 888, ptr addrspace(1) [[OUT]], align 4
; IR-NEXT: br i1 true, label [[LOOP2]], label [[DUMMYRETURNBLOCK]]
; IR: DummyReturnBlock:
; IR-NEXT: ret void
;
entry:
br i1 poison, label %loop1, label %loop2
loop1:
store volatile i32 999, ptr addrspace(1) %out, align 4
br label %loop1
loop2:
store volatile i32 888, ptr addrspace(1) %out, align 4
br label %loop2
}
define amdgpu_kernel void @infinite_loop_nest_ret(ptr addrspace(1) %out) {
; SI-LABEL: infinite_loop_nest_ret:
; SI: ; %bb.0: ; %entry
; SI-NEXT: v_cmp_ne_u32_e32 vcc, 1, v0
; SI-NEXT: s_and_saveexec_b64 s[0:1], vcc
; SI-NEXT: s_cbranch_execz .LBB3_5
; SI-NEXT: ; %bb.1: ; %outer_loop.preheader
; SI-NEXT: s_load_dwordx2 s[4:5], s[4:5], 0x9
; SI-NEXT: v_cmp_ne_u32_e64 s[0:1], 3, v0
; SI-NEXT: s_mov_b32 s7, 0xf000
; SI-NEXT: s_mov_b32 s6, -1
; SI-NEXT: v_mov_b32_e32 v0, 0x3e7
; SI-NEXT: .LBB3_2: ; %outer_loop
; SI-NEXT: ; =>This Loop Header: Depth=1
; SI-NEXT: ; Child Loop BB3_3 Depth 2
; SI-NEXT: s_mov_b64 s[2:3], 0
; SI-NEXT: .LBB3_3: ; %inner_loop
; SI-NEXT: ; Parent Loop BB3_2 Depth=1
; SI-NEXT: ; => This Inner Loop Header: Depth=2
; SI-NEXT: s_and_b64 s[8:9], exec, s[0:1]
; SI-NEXT: s_or_b64 s[2:3], s[8:9], s[2:3]
; SI-NEXT: s_waitcnt lgkmcnt(0)
; SI-NEXT: buffer_store_dword v0, off, s[4:7], 0
; SI-NEXT: s_waitcnt vmcnt(0)
; SI-NEXT: s_andn2_b64 exec, exec, s[2:3]
; SI-NEXT: s_cbranch_execnz .LBB3_3
; SI-NEXT: ; %bb.4: ; %loop.exit.guard
; SI-NEXT: ; in Loop: Header=BB3_2 Depth=1
; SI-NEXT: s_or_b64 exec, exec, s[2:3]
; SI-NEXT: s_mov_b64 vcc, 0
; SI-NEXT: s_branch .LBB3_2
; SI-NEXT: .LBB3_5: ; %UnifiedReturnBlock
; SI-NEXT: s_endpgm
; IR-LABEL: @infinite_loop_nest_ret(
; IR-NEXT: entry:
; IR-NEXT: [[TMP:%.*]] = tail call i32 @llvm.amdgcn.workitem.id.x()
; IR-NEXT: [[COND1:%.*]] = icmp ne i32 [[TMP]], 1
; IR-NEXT: br i1 [[COND1]], label [[OUTER_LOOP:%.*]], label [[UNIFIEDRETURNBLOCK:%.*]]
; IR: outer_loop:
; IR-NEXT: br label [[INNER_LOOP:%.*]]
; IR: inner_loop:
; IR-NEXT: store volatile i32 999, ptr addrspace(1) [[OUT:%.*]], align 4
; IR-NEXT: [[COND3:%.*]] = icmp eq i32 [[TMP]], 3
; IR-NEXT: br i1 true, label [[TRANSITIONBLOCK:%.*]], label [[UNIFIEDRETURNBLOCK]]
; IR: TransitionBlock:
; IR-NEXT: br i1 [[COND3]], label [[INNER_LOOP]], label [[OUTER_LOOP]]
; IR: UnifiedReturnBlock:
; IR-NEXT: ret void
;
entry:
%tmp = tail call i32 @llvm.amdgcn.workitem.id.x()
%cond1 = icmp ne i32 %tmp, 1 ; avoid following BB optimizing away through the domination
br i1 %cond1, label %outer_loop, label %return
outer_loop:
; %cond2 = icmp eq i32 %tmp, 2
; br i1 %cond2, label %outer_loop, label %inner_loop
br label %inner_loop
inner_loop: ; preds = %LeafBlock, %LeafBlock1
store volatile i32 999, ptr addrspace(1) %out, align 4
%cond3 = icmp eq i32 %tmp, 3
br i1 %cond3, label %inner_loop, label %outer_loop
return:
ret void
}
declare i32 @llvm.amdgcn.workitem.id.x()
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