AMDGPU: Add baseline test for mul24 ordering issues

llvm-svn: 369858

1 files changed, 263 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/AMDGPU/mul24-pass-ordering.ll b/llvm/test/CodeGen/AMDGPU/mul24-pass-ordering.ll
new file mode 100644
index 00000000000..1c38ec0251b
--- /dev/null
+++ b/llvm/test/CodeGen/AMDGPU/mul24-pass-ordering.ll
@@ -0,0 +1,263 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx900 -verify-machineinstrs < %s | FileCheck -check-prefix=GFX9 %s
+
+; Make sure that AMDGPUCodeGenPrepare introduces mul24 intrinsics
+; after SLSR, as the intrinsics would interfere. It's unclear if these
+; should be introduced before LSR or not. It seems to help in some
+; cases, and hurt others.
+
+define void @lsr_order_mul24_0(i32 %arg, i32 %arg2, i32 %arg6, i32 %arg13, i32 %arg16) #0 {
+; GFX9-LABEL: lsr_order_mul24_0:
+; GFX9:       ; %bb.0: ; %bb
+; GFX9-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GFX9-NEXT:    global_load_dword v5, v[0:1], off
+; GFX9-NEXT:    v_and_b32_e32 v2, 0xffffff, v2
+; GFX9-NEXT:    v_sub_u32_e32 v4, v4, v1
+; GFX9-NEXT:    s_mov_b64 s[4:5], 0
+; GFX9-NEXT:    s_waitcnt vmcnt(0)
+; GFX9-NEXT:    ds_write_b32 v0, v5
+; GFX9-NEXT:  BB0_1: ; %bb23
+; GFX9-NEXT:    ; =>This Inner Loop Header: Depth=1
+; GFX9-NEXT:    v_mul_u32_u24_e32 v5, v0, v2
+; GFX9-NEXT:    v_add_u32_e32 v0, v0, v1
+; GFX9-NEXT:    v_sub_u32_e32 v5, v4, v5
+; GFX9-NEXT:    v_add_u32_e32 v5, v5, v0
+; GFX9-NEXT:    v_cmp_ge_u32_e32 vcc, v5, v3
+; GFX9-NEXT:    s_or_b64 s[4:5], vcc, s[4:5]
+; GFX9-NEXT:    s_andn2_b64 exec, exec, s[4:5]
+; GFX9-NEXT:    s_cbranch_execnz BB0_1
+; GFX9-NEXT:  ; %bb.2: ; %.loopexit
+; GFX9-NEXT:    s_or_b64 exec, exec, s[4:5]
+; GFX9-NEXT:    s_waitcnt lgkmcnt(0)
+; GFX9-NEXT:    s_setpc_b64 s[30:31]
+bb:
+  %tmp22 = and i32 %arg6, 16777215
+  br label %bb23
+
+.loopexit:                                        ; preds = %bb23
+  ret void
+
+bb23:                                             ; preds = %bb23, %bb
+  %tmp24 = phi i32 [ %arg, %bb ], [ %tmp47, %bb23 ]
+  %tmp28 = and i32 %tmp24, 16777215
+  %tmp29 = mul i32 %tmp28, %tmp22
+  %tmp30 = sub i32 %tmp24, %tmp29
+  %tmp31 = add i32 %tmp30, %arg16
+  %tmp37 = icmp ult i32 %tmp31, %arg13
+  %tmp44 = load float, float addrspace(1)* undef, align 4
+  store float %tmp44, float addrspace(3)* undef, align 4
+  %tmp47 = add i32 %tmp24, %arg2
+  br i1 %tmp37, label %bb23, label %.loopexit
+}
+
+define void @lsr_order_mul24_1(i32 %arg, i32 %arg1, i32 %arg2, float addrspace(3)* nocapture %arg3, i32 %arg4, i32 %arg5, i32 %arg6, i32 %arg7, i32 %arg8, i32 %arg9, float addrspace(1)* nocapture readonly %arg10, i32 %arg11, i32 %arg12, i32 %arg13, i32 %arg14, i32 %arg15, i32 %arg16, i1 zeroext %arg17, i1 zeroext %arg18) #0 {
+; GFX9-LABEL: lsr_order_mul24_1:
+; GFX9:       ; %bb.0: ; %bb
+; GFX9-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GFX9-NEXT:    v_and_b32_e32 v5, 1, v18
+; GFX9-NEXT:    v_cmp_eq_u32_e32 vcc, 1, v5
+; GFX9-NEXT:    v_cmp_lt_u32_e64 s[4:5], v0, v1
+; GFX9-NEXT:    s_and_saveexec_b64 s[10:11], s[4:5]
+; GFX9-NEXT:    ; mask branch BB1_4
+; GFX9-NEXT:    s_cbranch_execz BB1_4
+; GFX9-NEXT:  BB1_1: ; %bb19
+; GFX9-NEXT:    v_cvt_f32_u32_e32 v7, v6
+; GFX9-NEXT:    v_and_b32_e32 v5, 0xffffff, v6
+; GFX9-NEXT:    v_add_u32_e32 v6, v4, v0
+; GFX9-NEXT:    v_lshl_add_u32 v3, v6, 2, v3
+; GFX9-NEXT:    v_rcp_iflag_f32_e32 v4, v7
+; GFX9-NEXT:    v_lshlrev_b32_e32 v6, 2, v2
+; GFX9-NEXT:    v_add_u32_e32 v7, v17, v12
+; GFX9-NEXT:    s_mov_b64 s[12:13], 0
+; GFX9-NEXT:  BB1_2: ; %bb23
+; GFX9-NEXT:    ; =>This Inner Loop Header: Depth=1
+; GFX9-NEXT:    v_cvt_f32_u32_e32 v8, v0
+; GFX9-NEXT:    v_add_u32_e32 v9, v17, v0
+; GFX9-NEXT:    v_add_u32_e32 v12, v7, v0
+; GFX9-NEXT:    v_add_u32_e32 v0, v0, v2
+; GFX9-NEXT:    v_madak_f32 v8, v8, v4, 0x3727c5ac
+; GFX9-NEXT:    v_cvt_u32_f32_e32 v8, v8
+; GFX9-NEXT:    v_cmp_ge_u32_e64 s[4:5], v0, v1
+; GFX9-NEXT:    v_mul_u32_u24_e32 v18, v8, v5
+; GFX9-NEXT:    v_add_u32_e32 v8, v8, v16
+; GFX9-NEXT:    v_cmp_lt_u32_e64 s[6:7], v8, v13
+; GFX9-NEXT:    v_mul_lo_u32 v8, v8, v15
+; GFX9-NEXT:    v_sub_u32_e32 v19, v9, v18
+; GFX9-NEXT:    v_cmp_lt_u32_e64 s[8:9], v19, v14
+; GFX9-NEXT:    s_and_b64 s[6:7], s[6:7], s[8:9]
+; GFX9-NEXT:    v_sub_u32_e32 v12, v12, v18
+; GFX9-NEXT:    s_and_b64 s[6:7], s[6:7], vcc
+; GFX9-NEXT:    v_add_u32_e32 v8, v12, v8
+; GFX9-NEXT:    v_mov_b32_e32 v9, 0
+; GFX9-NEXT:    v_cndmask_b32_e64 v8, 0, v8, s[6:7]
+; GFX9-NEXT:    v_lshlrev_b64 v[8:9], 2, v[8:9]
+; GFX9-NEXT:    s_or_b64 s[12:13], s[4:5], s[12:13]
+; GFX9-NEXT:    v_add_co_u32_e64 v8, s[4:5], v10, v8
+; GFX9-NEXT:    v_addc_co_u32_e64 v9, s[4:5], v11, v9, s[4:5]
+; GFX9-NEXT:    global_load_dword v8, v[8:9], off
+; GFX9-NEXT:    s_waitcnt vmcnt(0)
+; GFX9-NEXT:    v_cndmask_b32_e64 v8, 0, v8, s[6:7]
+; GFX9-NEXT:    ds_write_b32 v3, v8
+; GFX9-NEXT:    v_add_u32_e32 v3, v3, v6
+; GFX9-NEXT:    s_andn2_b64 exec, exec, s[12:13]
+; GFX9-NEXT:    s_cbranch_execnz BB1_2
+; GFX9-NEXT:  ; %bb.3: ; %Flow
+; GFX9-NEXT:    s_or_b64 exec, exec, s[12:13]
+; GFX9-NEXT:  BB1_4: ; %Flow3
+; GFX9-NEXT:    s_or_b64 exec, exec, s[10:11]
+; GFX9-NEXT:    s_waitcnt lgkmcnt(0)
+; GFX9-NEXT:    s_setpc_b64 s[30:31]
+bb:
+  %tmp = icmp ult i32 %arg, %arg1
+  br i1 %tmp, label %bb19, label %.loopexit
+
+bb19:                                             ; preds = %bb
+  %tmp20 = uitofp i32 %arg6 to float
+  %tmp21 = fdiv float 1.000000e+00, %tmp20
+  %tmp22 = and i32 %arg6, 16777215
+  br label %bb23
+
+.loopexit:                                        ; preds = %bb23, %bb
+  ret void
+
+bb23:                                             ; preds = %bb19, %bb23
+  %tmp24 = phi i32 [ %arg, %bb19 ], [ %tmp47, %bb23 ]
+  %tmp25 = uitofp i32 %tmp24 to float
+  %tmp26 = tail call float @llvm.fmuladd.f32(float %tmp25, float %tmp21, float 0x3EE4F8B580000000) #2
+  %tmp27 = fptoui float %tmp26 to i32
+  %tmp28 = and i32 %tmp27, 16777215
+  %tmp29 = mul i32 %tmp28, %tmp22
+  %tmp30 = sub i32 %tmp24, %tmp29
+  %tmp31 = add i32 %tmp30, %arg16
+  %tmp32 = add i32 %tmp27, %arg15
+  %tmp33 = mul i32 %tmp32, %arg14
+  %tmp34 = add i32 %tmp33, %arg11
+  %tmp35 = add i32 %tmp34, %tmp31
+  %tmp36 = add i32 %tmp24, %arg4
+  %tmp37 = icmp ult i32 %tmp31, %arg13
+  %tmp38 = icmp ult i32 %tmp32, %arg12
+  %tmp39 = and i1 %tmp38, %tmp37
+  %tmp40 = and i1 %tmp39, %arg17
+  %tmp41 = zext i32 %tmp35 to i64
+  %tmp42 = select i1 %tmp40, i64 %tmp41, i64 0
+  %tmp43 = getelementptr inbounds float, float addrspace(1)* %arg10, i64 %tmp42
+  %tmp44 = load float, float addrspace(1)* %tmp43, align 4
+  %tmp45 = select i1 %tmp40, float %tmp44, float 0.000000e+00
+  %tmp46 = getelementptr inbounds float, float addrspace(3)* %arg3, i32 %tmp36
+  store float %tmp45, float addrspace(3)* %tmp46, align 4
+  %tmp47 = add i32 %tmp24, %arg2
+  %tmp48 = icmp ult i32 %tmp47, %arg1
+  br i1 %tmp48, label %bb23, label %.loopexit
+}
+
+define void @slsr1_0(i32 %b.arg, i32 %s.arg) #0 {
+; GFX9-LABEL: slsr1_0:
+; GFX9:       ; %bb.0:
+; GFX9-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GFX9-NEXT:    s_mov_b32 s4, 0xffffff
+; GFX9-NEXT:    v_and_b32_e32 v2, s4, v0
+; GFX9-NEXT:    v_and_b32_e32 v3, s4, v1
+; GFX9-NEXT:    v_add_u32_e32 v2, 1, v2
+; GFX9-NEXT:    v_mul_lo_u32 v2, v2, v3
+; GFX9-NEXT:    v_mul_u32_u24_e32 v0, v0, v1
+; GFX9-NEXT:    global_store_dword v[0:1], v0, off
+; GFX9-NEXT:    global_store_dword v[0:1], v2, off
+; GFX9-NEXT:    v_add_u32_e32 v0, v2, v3
+; GFX9-NEXT:    global_store_dword v[0:1], v0, off
+; GFX9-NEXT:    s_waitcnt vmcnt(0)
+; GFX9-NEXT:    s_setpc_b64 s[30:31]
+  %b = and i32 %b.arg, 16777215
+  %s = and i32 %s.arg, 16777215
+
+; CHECK-LABEL: @slsr1(
+  ; foo(b * s);
+  %mul0 = mul i32 %b, %s
+; CHECK: mul i32
+; CHECK-NOT: mul i32
+  store volatile i32 %mul0, i32 addrspace(1)* undef
+
+  ; foo((b + 1) * s);
+  %b1 = add i32 %b, 1
+  %mul1 = mul i32 %b1, %s
+  store volatile i32 %mul1, i32 addrspace(1)* undef
+
+  ; foo((b + 2) * s);
+  %b2 = add i32 %b, 2
+  %mul2 = mul i32 %b2, %s
+  store volatile i32 %mul2, i32 addrspace(1)* undef
+  ret void
+}
+
+define void @slsr1_1(i32 %b.arg, i32 %s.arg) #0 {
+; GFX9-LABEL: slsr1_1:
+; GFX9:       ; %bb.0:
+; GFX9-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GFX9-NEXT:    s_or_saveexec_b64 s[4:5], -1
+; GFX9-NEXT:    buffer_store_dword v34, off, s[0:3], s32 offset:8 ; 4-byte Folded Spill
+; GFX9-NEXT:    s_mov_b64 exec, s[4:5]
+; GFX9-NEXT:    v_writelane_b32 v34, s34, 4
+; GFX9-NEXT:    s_mov_b32 s34, s32
+; GFX9-NEXT:    buffer_store_dword v32, off, s[0:3], s34 offset:4 ; 4-byte Folded Spill
+; GFX9-NEXT:    buffer_store_dword v33, off, s[0:3], s34 ; 4-byte Folded Spill
+; GFX9-NEXT:    v_writelane_b32 v34, s36, 0
+; GFX9-NEXT:    s_mov_b32 s4, 0xffffff
+; GFX9-NEXT:    s_add_u32 s32, s32, 0x400
+; GFX9-NEXT:    v_writelane_b32 v34, s37, 1
+; GFX9-NEXT:    v_and_b32_e32 v32, s4, v0
+; GFX9-NEXT:    v_and_b32_e32 v33, s4, v1
+; GFX9-NEXT:    s_getpc_b64 s[4:5]
+; GFX9-NEXT:    s_add_u32 s4, s4, foo@gotpcrel32@lo+4
+; GFX9-NEXT:    s_addc_u32 s5, s5, foo@gotpcrel32@hi+4
+; GFX9-NEXT:    s_load_dwordx2 s[36:37], s[4:5], 0x0
+; GFX9-NEXT:    v_writelane_b32 v34, s30, 2
+; GFX9-NEXT:    v_mul_u32_u24_e32 v0, v0, v1
+; GFX9-NEXT:    v_writelane_b32 v34, s31, 3
+; GFX9-NEXT:    s_waitcnt lgkmcnt(0)
+; GFX9-NEXT:    s_swappc_b64 s[30:31], s[36:37]
+; GFX9-NEXT:    v_add_u32_e32 v0, 1, v32
+; GFX9-NEXT:    v_mul_lo_u32 v32, v0, v33
+; GFX9-NEXT:    v_mov_b32_e32 v0, v32
+; GFX9-NEXT:    s_swappc_b64 s[30:31], s[36:37]
+; GFX9-NEXT:    v_add_u32_e32 v0, v32, v33
+; GFX9-NEXT:    s_swappc_b64 s[30:31], s[36:37]
+; GFX9-NEXT:    v_readlane_b32 s4, v34, 2
+; GFX9-NEXT:    v_readlane_b32 s5, v34, 3
+; GFX9-NEXT:    v_readlane_b32 s37, v34, 1
+; GFX9-NEXT:    v_readlane_b32 s36, v34, 0
+; GFX9-NEXT:    buffer_load_dword v33, off, s[0:3], s34 ; 4-byte Folded Reload
+; GFX9-NEXT:    buffer_load_dword v32, off, s[0:3], s34 offset:4 ; 4-byte Folded Reload
+; GFX9-NEXT:    s_sub_u32 s32, s32, 0x400
+; GFX9-NEXT:    v_readlane_b32 s34, v34, 4
+; GFX9-NEXT:    s_or_saveexec_b64 s[6:7], -1
+; GFX9-NEXT:    buffer_load_dword v34, off, s[0:3], s32 offset:8 ; 4-byte Folded Reload
+; GFX9-NEXT:    s_mov_b64 exec, s[6:7]
+; GFX9-NEXT:    s_waitcnt vmcnt(0)
+; GFX9-NEXT:    s_setpc_b64 s[4:5]
+  %b = and i32 %b.arg, 16777215
+  %s = and i32 %s.arg, 16777215
+
+; CHECK-LABEL: @slsr1(
+  ; foo(b * s);
+  %mul0 = mul i32 %b, %s
+; CHECK: mul i32
+; CHECK-NOT: mul i32
+  call void @foo(i32 %mul0)
+
+  ; foo((b + 1) * s);
+  %b1 = add i32 %b, 1
+  %mul1 = mul i32 %b1, %s
+  call void @foo(i32 %mul1)
+
+  ; foo((b + 2) * s);
+  %b2 = add i32 %b, 2
+  %mul2 = mul i32 %b2, %s
+  call void @foo(i32 %mul2)
+
+  ret void
+}
+
+declare void @foo(i32) #0
+declare float @llvm.fmuladd.f32(float, float, float) #1
+
+attributes #0 = { nounwind willreturn }
+attributes #1 = { nounwind readnone speculatable }