derek.holloway
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90 lines
3.7 KiB
LLVM
90 lines
3.7 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx908 -O0 -o - %s | FileCheck %s
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; Regression test for `processFunctionBeforeFrameFinalized`:
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; Check that it correctly updates RegisterScavenger so we
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; don't end up with bad machine code due to using undefined
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; physical registers.
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define void @test() {
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; CHECK-LABEL: test:
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; CHECK: ; %bb.0: ; %bb.0
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; CHECK-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
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; CHECK-NEXT: s_xor_saveexec_b64 s[4:5], -1
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; CHECK-NEXT: buffer_store_dword v1, off, s[0:3], s32 ; 4-byte Folded Spill
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; CHECK-NEXT: s_mov_b64 exec, s[4:5]
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; CHECK-NEXT: ; implicit-def: $vgpr1 : SGPR spill to VGPR lane
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; CHECK-NEXT: .LBB0_1: ; %bb.1
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; CHECK-NEXT: ; =>This Inner Loop Header: Depth=1
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; CHECK-NEXT: s_cbranch_scc1 .LBB0_3
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; CHECK-NEXT: ; %bb.2: ; %bb.2
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; CHECK-NEXT: ; in Loop: Header=BB0_1 Depth=1
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; CHECK-NEXT: .LBB0_3: ; %bb.3
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; CHECK-NEXT: ; in Loop: Header=BB0_1 Depth=1
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; CHECK-NEXT: s_or_saveexec_b64 s[10:11], -1
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; CHECK-NEXT: v_accvgpr_read_b32 v1, a0 ; Reload Reuse
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; CHECK-NEXT: s_mov_b64 exec, s[10:11]
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; CHECK-NEXT: ; implicit-def: $sgpr4
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; CHECK-NEXT: v_mov_b32_e32 v0, s4
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; CHECK-NEXT: v_readfirstlane_b32 s6, v0
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; CHECK-NEXT: s_mov_b64 s[4:5], -1
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; CHECK-NEXT: s_mov_b32 s7, 0
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; CHECK-NEXT: s_cmp_lg_u32 s6, s7
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; CHECK-NEXT: s_cselect_b64 s[6:7], -1, 0
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; CHECK-NEXT: s_xor_b64 s[6:7], s[6:7], s[4:5]
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; CHECK-NEXT: s_and_b64 vcc, exec, s[6:7]
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; CHECK-NEXT: v_writelane_b32 v1, s4, 0
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; CHECK-NEXT: v_writelane_b32 v1, s5, 1
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; CHECK-NEXT: s_or_saveexec_b64 s[10:11], -1
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; CHECK-NEXT: s_nop 0
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; CHECK-NEXT: v_accvgpr_write_b32 a0, v1 ; Reload Reuse
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; CHECK-NEXT: s_mov_b64 exec, s[10:11]
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; CHECK-NEXT: s_cbranch_vccnz .LBB0_5
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; CHECK-NEXT: ; %bb.4: ; %bb.4
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; CHECK-NEXT: ; in Loop: Header=BB0_1 Depth=1
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; CHECK-NEXT: s_or_saveexec_b64 s[10:11], -1
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; CHECK-NEXT: v_accvgpr_read_b32 v1, a0 ; Reload Reuse
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; CHECK-NEXT: s_mov_b64 exec, s[10:11]
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; CHECK-NEXT: s_mov_b64 s[4:5], 0
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; CHECK-NEXT: v_writelane_b32 v1, s4, 0
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; CHECK-NEXT: v_writelane_b32 v1, s5, 1
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; CHECK-NEXT: s_or_saveexec_b64 s[10:11], -1
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; CHECK-NEXT: s_nop 0
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; CHECK-NEXT: v_accvgpr_write_b32 a0, v1 ; Reload Reuse
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; CHECK-NEXT: s_mov_b64 exec, s[10:11]
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; CHECK-NEXT: .LBB0_5: ; %Flow
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; CHECK-NEXT: ; in Loop: Header=BB0_1 Depth=1
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; CHECK-NEXT: s_or_saveexec_b64 s[10:11], -1
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; CHECK-NEXT: s_nop 0
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; CHECK-NEXT: v_accvgpr_read_b32 v1, a0 ; Reload Reuse
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; CHECK-NEXT: s_mov_b64 exec, s[10:11]
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; CHECK-NEXT: v_readlane_b32 s4, v1, 0
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; CHECK-NEXT: v_readlane_b32 s5, v1, 1
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; CHECK-NEXT: s_mov_b64 s[6:7], -1
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; CHECK-NEXT: s_xor_b64 s[4:5], s[4:5], s[6:7]
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; CHECK-NEXT: s_and_b64 vcc, exec, s[4:5]
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; CHECK-NEXT: s_cbranch_vccnz .LBB0_1
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; CHECK-NEXT: ; %bb.6: ; %bb.5
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; CHECK-NEXT: s_xor_saveexec_b64 s[4:5], -1
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; CHECK-NEXT: buffer_load_dword v1, off, s[0:3], s32 ; 4-byte Folded Reload
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; CHECK-NEXT: s_mov_b64 exec, s[4:5]
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; CHECK-NEXT: s_waitcnt vmcnt(0)
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; CHECK-NEXT: s_setpc_b64 s[30:31]
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bb.0:
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br label %bb.1
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bb.1: ; preds = %bb.4, %bb.0
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br i1 poison, label %bb.2, label %bb.3
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bb.2: ; preds = %bb.1
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br label %bb.3
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bb.3: ; preds = %bb.2, %bb.1
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%call = tail call i32 @llvm.amdgcn.readfirstlane(i32 poison)
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%cmp = icmp eq i32 %call, 0
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br i1 %cmp, label %bb.5, label %bb.4
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bb.4: ; preds = %bb.3
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br label %bb.1
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bb.5: ; preds = %bb.3
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ret void
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}
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declare i32 @llvm.amdgcn.readfirstlane(i32)
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