228 lines
7.3 KiB
LLVM
228 lines
7.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc -march=amdgcn -mcpu=tahiti -verify-machineinstrs < %s | FileCheck -enable-var-scope -check-prefix=SI %s
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;
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; Most SALU instructions ignore control flow, so we need to make sure
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; they don't overwrite values from other blocks.
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; If the branch decision is made based on a value in an SGPR then all
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; threads will execute the same code paths, so we don't need to worry
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; about instructions in different blocks overwriting each other.
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define amdgpu_kernel void @sgpr_if_else_salu_br(i32 addrspace(1)* %out, i32 %a, i32 %b, i32 %c, i32 %d, i32 %e) {
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; SI-LABEL: sgpr_if_else_salu_br:
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; SI: ; %bb.0: ; %entry
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; SI-NEXT: s_load_dwordx2 s[4:5], s[0:1], 0x9
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; SI-NEXT: s_load_dwordx4 s[8:11], s[0:1], 0xb
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; SI-NEXT: s_load_dword s0, s[0:1], 0xf
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; SI-NEXT: s_waitcnt lgkmcnt(0)
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; SI-NEXT: s_cmp_lg_u32 s8, 0
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; SI-NEXT: s_cbranch_scc0 BB0_2
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; SI-NEXT: ; %bb.1: ; %else
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; SI-NEXT: s_add_i32 s0, s11, s0
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; SI-NEXT: s_cbranch_execz BB0_3
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; SI-NEXT: s_branch BB0_4
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; SI-NEXT: BB0_2:
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; SI-NEXT: ; implicit-def: $sgpr0
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; SI-NEXT: BB0_3: ; %if
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; SI-NEXT: s_sub_i32 s0, s9, s10
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; SI-NEXT: BB0_4: ; %endif
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; SI-NEXT: s_add_i32 s0, s0, s8
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; SI-NEXT: s_mov_b32 s7, 0xf000
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; SI-NEXT: s_mov_b32 s6, -1
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; SI-NEXT: v_mov_b32_e32 v0, s0
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; SI-NEXT: buffer_store_dword v0, off, s[4:7], 0
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; SI-NEXT: s_endpgm
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entry:
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%0 = icmp eq i32 %a, 0
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br i1 %0, label %if, label %else
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if:
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%1 = sub i32 %b, %c
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br label %endif
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else:
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%2 = add i32 %d, %e
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br label %endif
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endif:
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%3 = phi i32 [%1, %if], [%2, %else]
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%4 = add i32 %3, %a
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store i32 %4, i32 addrspace(1)* %out
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ret void
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}
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define amdgpu_kernel void @sgpr_if_else_salu_br_opt(i32 addrspace(1)* %out, [8 x i32], i32 %a, [8 x i32], i32 %b, [8 x i32], i32 %c, [8 x i32], i32 %d, [8 x i32], i32 %e) {
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; SI-LABEL: sgpr_if_else_salu_br_opt:
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; SI: ; %bb.0: ; %entry
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; SI-NEXT: s_load_dword s2, s[0:1], 0x13
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; SI-NEXT: s_load_dwordx2 s[4:5], s[0:1], 0x9
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; SI-NEXT: s_waitcnt lgkmcnt(0)
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; SI-NEXT: s_cmp_lg_u32 s2, 0
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; SI-NEXT: s_cbranch_scc0 BB1_2
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; SI-NEXT: ; %bb.1: ; %else
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; SI-NEXT: s_load_dword s3, s[0:1], 0x2e
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; SI-NEXT: s_load_dword s6, s[0:1], 0x37
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; SI-NEXT: s_waitcnt lgkmcnt(0)
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; SI-NEXT: s_add_i32 s3, s3, s6
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; SI-NEXT: s_cbranch_execz BB1_3
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; SI-NEXT: s_branch BB1_4
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; SI-NEXT: BB1_2:
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; SI-NEXT: ; implicit-def: $sgpr3
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; SI-NEXT: BB1_3: ; %if
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; SI-NEXT: s_load_dword s3, s[0:1], 0x1c
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; SI-NEXT: s_load_dword s0, s[0:1], 0x25
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; SI-NEXT: s_waitcnt lgkmcnt(0)
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; SI-NEXT: s_add_i32 s3, s3, s0
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; SI-NEXT: BB1_4: ; %endif
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; SI-NEXT: s_add_i32 s0, s3, s2
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; SI-NEXT: s_mov_b32 s7, 0xf000
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; SI-NEXT: s_mov_b32 s6, -1
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; SI-NEXT: v_mov_b32_e32 v0, s0
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; SI-NEXT: buffer_store_dword v0, off, s[4:7], 0
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; SI-NEXT: s_endpgm
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entry:
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%cmp0 = icmp eq i32 %a, 0
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br i1 %cmp0, label %if, label %else
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if:
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%add0 = add i32 %b, %c
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br label %endif
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else:
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%add1 = add i32 %d, %e
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br label %endif
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endif:
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%phi = phi i32 [%add0, %if], [%add1, %else]
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%add2 = add i32 %phi, %a
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store i32 %add2, i32 addrspace(1)* %out
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ret void
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}
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; The two S_ADD instructions should write to different registers, since
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; different threads will take different control flow paths.
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define amdgpu_kernel void @sgpr_if_else_valu_br(i32 addrspace(1)* %out, float %a, i32 %b, i32 %c, i32 %d, i32 %e) {
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; SI-LABEL: sgpr_if_else_valu_br:
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; SI: ; %bb.0: ; %entry
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; SI-NEXT: v_cvt_f32_u32_e32 v0, v0
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; SI-NEXT: s_load_dwordx2 s[4:5], s[0:1], 0x9
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; SI-NEXT: s_load_dwordx4 s[0:3], s[0:1], 0xc
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; SI-NEXT: ; implicit-def: $sgpr6
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; SI-NEXT: v_cmp_lg_f32_e32 vcc, 0, v0
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; SI-NEXT: s_and_saveexec_b64 s[8:9], vcc
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; SI-NEXT: s_xor_b64 s[8:9], exec, s[8:9]
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; SI-NEXT: s_cbranch_execz BB2_2
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; SI-NEXT: ; %bb.1: ; %else
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; SI-NEXT: s_waitcnt lgkmcnt(0)
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; SI-NEXT: s_add_i32 s6, s2, s3
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; SI-NEXT: BB2_2: ; %Flow
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; SI-NEXT: s_waitcnt lgkmcnt(0)
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; SI-NEXT: s_or_saveexec_b64 s[2:3], s[8:9]
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; SI-NEXT: v_mov_b32_e32 v0, s6
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; SI-NEXT: s_xor_b64 exec, exec, s[2:3]
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; SI-NEXT: ; %bb.3: ; %if
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; SI-NEXT: s_add_i32 s0, s0, s1
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; SI-NEXT: v_mov_b32_e32 v0, s0
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; SI-NEXT: ; %bb.4: ; %endif
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; SI-NEXT: s_or_b64 exec, exec, s[2:3]
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; SI-NEXT: s_mov_b32 s7, 0xf000
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; SI-NEXT: s_mov_b32 s6, -1
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; SI-NEXT: buffer_store_dword v0, off, s[4:7], 0
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; SI-NEXT: s_endpgm
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entry:
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%tid = call i32 @llvm.amdgcn.workitem.id.x() #0
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%tid_f = uitofp i32 %tid to float
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%tmp1 = fcmp ueq float %tid_f, 0.0
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br i1 %tmp1, label %if, label %else
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if:
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%tmp2 = add i32 %b, %c
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br label %endif
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else:
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%tmp3 = add i32 %d, %e
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br label %endif
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endif:
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%tmp4 = phi i32 [%tmp2, %if], [%tmp3, %else]
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store i32 %tmp4, i32 addrspace(1)* %out
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ret void
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}
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define amdgpu_kernel void @sgpr_if_else_valu_cmp_phi_br(i32 addrspace(1)* %out, i32 addrspace(1)* %a, i32 addrspace(1)* %b) {
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; SI-LABEL: sgpr_if_else_valu_cmp_phi_br:
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; SI: ; %bb.0: ; %entry
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; SI-NEXT: s_load_dwordx4 s[4:7], s[0:1], 0x9
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; SI-NEXT: s_load_dwordx2 s[8:9], s[0:1], 0xd
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; SI-NEXT: s_mov_b32 s10, 0
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; SI-NEXT: v_cmp_ne_u32_e32 vcc, 0, v0
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; SI-NEXT: ; implicit-def: $sgpr0_sgpr1
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; SI-NEXT: s_and_saveexec_b64 s[2:3], vcc
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; SI-NEXT: s_xor_b64 s[2:3], exec, s[2:3]
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; SI-NEXT: s_cbranch_execz BB3_2
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; SI-NEXT: ; %bb.1: ; %else
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; SI-NEXT: s_mov_b32 s11, 0xf000
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; SI-NEXT: v_lshlrev_b32_e32 v1, 2, v0
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; SI-NEXT: v_mov_b32_e32 v2, 0
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; SI-NEXT: s_waitcnt lgkmcnt(0)
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; SI-NEXT: buffer_load_dword v1, v[1:2], s[8:11], 0 addr64
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; SI-NEXT: s_andn2_b64 s[0:1], s[0:1], exec
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; SI-NEXT: s_waitcnt vmcnt(0)
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; SI-NEXT: v_cmp_gt_i32_e32 vcc, 0, v1
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; SI-NEXT: s_and_b64 s[8:9], vcc, exec
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; SI-NEXT: s_or_b64 s[0:1], s[0:1], s[8:9]
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; SI-NEXT: BB3_2: ; %Flow
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; SI-NEXT: s_or_saveexec_b64 s[2:3], s[2:3]
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; SI-NEXT: s_xor_b64 exec, exec, s[2:3]
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; SI-NEXT: s_cbranch_execz BB3_4
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; SI-NEXT: ; %bb.3: ; %if
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; SI-NEXT: s_mov_b32 s11, 0xf000
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; SI-NEXT: s_mov_b32 s10, 0
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; SI-NEXT: s_waitcnt lgkmcnt(0)
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; SI-NEXT: s_mov_b64 s[8:9], s[6:7]
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; SI-NEXT: v_lshlrev_b32_e32 v0, 2, v0
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; SI-NEXT: v_mov_b32_e32 v1, 0
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; SI-NEXT: buffer_load_dword v0, v[0:1], s[8:11], 0 addr64
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; SI-NEXT: s_andn2_b64 s[0:1], s[0:1], exec
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; SI-NEXT: s_waitcnt vmcnt(0)
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; SI-NEXT: v_cmp_eq_u32_e32 vcc, 0, v0
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; SI-NEXT: s_and_b64 s[6:7], vcc, exec
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; SI-NEXT: s_or_b64 s[0:1], s[0:1], s[6:7]
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; SI-NEXT: BB3_4: ; %endif
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; SI-NEXT: s_or_b64 exec, exec, s[2:3]
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; SI-NEXT: s_waitcnt lgkmcnt(0)
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; SI-NEXT: s_mov_b32 s7, 0xf000
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; SI-NEXT: s_mov_b32 s6, -1
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; SI-NEXT: v_cndmask_b32_e64 v0, 0, -1, s[0:1]
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; SI-NEXT: buffer_store_dword v0, off, s[4:7], 0
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; SI-NEXT: s_endpgm
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entry:
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%tid = call i32 @llvm.amdgcn.workitem.id.x() #0
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%tmp1 = icmp eq i32 %tid, 0
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br i1 %tmp1, label %if, label %else
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if:
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%gep.if = getelementptr i32, i32 addrspace(1)* %a, i32 %tid
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%a.val = load i32, i32 addrspace(1)* %gep.if
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%cmp.if = icmp eq i32 %a.val, 0
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br label %endif
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else:
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%gep.else = getelementptr i32, i32 addrspace(1)* %b, i32 %tid
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%b.val = load i32, i32 addrspace(1)* %gep.else
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%cmp.else = icmp slt i32 %b.val, 0
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br label %endif
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endif:
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%tmp4 = phi i1 [%cmp.if, %if], [%cmp.else, %else]
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%ext = sext i1 %tmp4 to i32
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store i32 %ext, i32 addrspace(1)* %out
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ret void
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}
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declare i32 @llvm.amdgcn.workitem.id.x() #0
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attributes #0 = { readnone }
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