xref: /llvm-project/llvm/test/CodeGen/Thumb2/LowOverheadLoops/tail-pred-intrinsic-sub-sat.ll (revision b5b663aac17415625340eb29c8010832bfc4c21c)
1; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
2; RUN: llc -mtriple=thumbv8.1m.main-none-none-eabi -mattr=+mve -verify-machineinstrs -tail-predication=enabled -o - %s | FileCheck %s
3
4define arm_aapcs_vfpcc void @usub_sat(ptr noalias nocapture readonly %pSrcA, ptr noalias nocapture readonly %pSrcB, ptr noalias nocapture %pDst, i32 %blockSize) {
5; CHECK-LABEL: usub_sat:
6; CHECK:       @ %bb.0: @ %entry
7; CHECK-NEXT:    .save {r7, lr}
8; CHECK-NEXT:    push {r7, lr}
9; CHECK-NEXT:    cmp r3, #0
10; CHECK-NEXT:    it eq
11; CHECK-NEXT:    popeq {r7, pc}
12; CHECK-NEXT:  .LBB0_1: @ %vector.ph
13; CHECK-NEXT:    dlstp.16 lr, r3
14; CHECK-NEXT:  .LBB0_2: @ %vector.body
15; CHECK-NEXT:    @ =>This Inner Loop Header: Depth=1
16; CHECK-NEXT:    vldrh.u16 q0, [r1], #16
17; CHECK-NEXT:    vldrh.u16 q1, [r0], #16
18; CHECK-NEXT:    vqsub.u16 q0, q1, q0
19; CHECK-NEXT:    vstrh.16 q0, [r2], #16
20; CHECK-NEXT:    letp lr, .LBB0_2
21; CHECK-NEXT:  @ %bb.3: @ %while.end
22; CHECK-NEXT:    pop {r7, pc}
23entry:
24  %cmp7 = icmp eq i32 %blockSize, 0
25  br i1 %cmp7, label %while.end, label %vector.ph
26
27vector.ph:                                        ; preds = %entry
28  %n.rnd.up = add i32 %blockSize, 7
29  %n.vec = and i32 %n.rnd.up, -8
30  br label %vector.body
31
32vector.body:                                      ; preds = %vector.body, %vector.ph
33  %index = phi i32 [ 0, %vector.ph ], [ %index.next, %vector.body ]
34  %next.gep = getelementptr i16, ptr %pSrcA, i32 %index
35  %next.gep20 = getelementptr i16, ptr %pDst, i32 %index
36  %next.gep21 = getelementptr i16, ptr %pSrcB, i32 %index
37  %active.lane.mask = call <8 x i1> @llvm.get.active.lane.mask.v8i1.i32(i32 %index, i32 %blockSize)
38  %wide.masked.load = call <8 x i16> @llvm.masked.load.v8i16.p0(ptr %next.gep, i32 2, <8 x i1> %active.lane.mask, <8 x i16> undef)
39  %wide.masked.load24 = call <8 x i16> @llvm.masked.load.v8i16.p0(ptr %next.gep21, i32 2, <8 x i1> %active.lane.mask, <8 x i16> undef)
40  %0 = call <8 x i16> @llvm.usub.sat.v8i16(<8 x i16> %wide.masked.load, <8 x i16> %wide.masked.load24)
41  call void @llvm.masked.store.v8i16.p0(<8 x i16> %0, ptr %next.gep20, i32 2, <8 x i1> %active.lane.mask)
42  %index.next = add i32 %index, 8
43  %1 = icmp eq i32 %index.next, %n.vec
44  br i1 %1, label %while.end, label %vector.body
45
46while.end:                                        ; preds = %vector.body, %entry
47  ret void
48}
49
50define arm_aapcs_vfpcc void @ssub_sat(ptr noalias nocapture readonly %pSrcA, ptr noalias nocapture readonly %pSrcB, ptr noalias nocapture %pDst, i32 %blockSize) {
51; CHECK-LABEL: ssub_sat:
52; CHECK:       @ %bb.0: @ %entry
53; CHECK-NEXT:    .save {r7, lr}
54; CHECK-NEXT:    push {r7, lr}
55; CHECK-NEXT:    cmp r3, #0
56; CHECK-NEXT:    it eq
57; CHECK-NEXT:    popeq {r7, pc}
58; CHECK-NEXT:  .LBB1_1: @ %vector.ph
59; CHECK-NEXT:    dlstp.16 lr, r3
60; CHECK-NEXT:  .LBB1_2: @ %vector.body
61; CHECK-NEXT:    @ =>This Inner Loop Header: Depth=1
62; CHECK-NEXT:    vldrh.u16 q0, [r1], #16
63; CHECK-NEXT:    vldrh.u16 q1, [r0], #16
64; CHECK-NEXT:    vqsub.s16 q0, q1, q0
65; CHECK-NEXT:    vstrh.16 q0, [r2], #16
66; CHECK-NEXT:    letp lr, .LBB1_2
67; CHECK-NEXT:  @ %bb.3: @ %while.end
68; CHECK-NEXT:    pop {r7, pc}
69entry:
70  %cmp7 = icmp eq i32 %blockSize, 0
71  br i1 %cmp7, label %while.end, label %vector.ph
72
73vector.ph:                                        ; preds = %entry
74  %n.rnd.up = add i32 %blockSize, 7
75  %n.vec = and i32 %n.rnd.up, -8
76  br label %vector.body
77
78vector.body:                                      ; preds = %vector.body, %vector.ph
79  %index = phi i32 [ 0, %vector.ph ], [ %index.next, %vector.body ]
80  %next.gep = getelementptr i16, ptr %pSrcA, i32 %index
81  %next.gep20 = getelementptr i16, ptr %pDst, i32 %index
82  %next.gep21 = getelementptr i16, ptr %pSrcB, i32 %index
83  %active.lane.mask = call <8 x i1> @llvm.get.active.lane.mask.v8i1.i32(i32 %index, i32 %blockSize)
84  %wide.masked.load = call <8 x i16> @llvm.masked.load.v8i16.p0(ptr %next.gep, i32 2, <8 x i1> %active.lane.mask, <8 x i16> undef)
85  %wide.masked.load24 = call <8 x i16> @llvm.masked.load.v8i16.p0(ptr %next.gep21, i32 2, <8 x i1> %active.lane.mask, <8 x i16> undef)
86  %0 = call <8 x i16> @llvm.ssub.sat.v8i16(<8 x i16> %wide.masked.load, <8 x i16> %wide.masked.load24)
87  call void @llvm.masked.store.v8i16.p0(<8 x i16> %0, ptr %next.gep20, i32 2, <8 x i1> %active.lane.mask)
88  %index.next = add i32 %index, 8
89  %1 = icmp eq i32 %index.next, %n.vec
90  br i1 %1, label %while.end, label %vector.body
91
92while.end:                                        ; preds = %vector.body, %entry
93  ret void
94}
95
96declare <8 x i1> @llvm.get.active.lane.mask.v8i1.i32(i32, i32)
97
98declare <8 x i16> @llvm.masked.load.v8i16.p0(ptr, i32 immarg, <8 x i1>, <8 x i16>)
99
100declare <8 x i16> @llvm.ssub.sat.v8i16(<8 x i16>, <8 x i16>)
101
102declare <8 x i16> @llvm.usub.sat.v8i16(<8 x i16>, <8 x i16>)
103
104declare void @llvm.masked.store.v8i16.p0(<8 x i16>, ptr, i32 immarg, <8 x i1>)
105