1 ; RUN: opt < %s -passes=loop-vectorize,dce,instcombine,simplifycfg -force-vector-interleave=1 -force-vector-width=4 -S -simplifycfg-require-and-preserve-domtree=1 | FileCheck %s
3 target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
6 ; We want to make sure that we are vectorizeing the scalar loop only once
7 ; even if the pass manager runs the vectorizer multiple times due to inlining.
10 ; This test checks that we add metadata to vectorized loops
11 ; CHECK-LABEL: @_Z4foo1Pii(
13 ; CHECK: br i1 %{{.*}}, label %{{.*}}, label %vector.body, !llvm.loop [[VEC_LOOP1:![0-9]+]]
15 ; CHECK: br i1 %{{.*}}, label %{{.*}}, label %for.body.i, !llvm.loop [[SCALAR_LOOP1:![0-9]+]]
18 ; This test comes from the loop:
20 ;int foo (int *A, int n) {
21 ; return std::accumulate(A, A + n, 0);
23 define i32 @_Z4foo1Pii(ptr %A, i32 %n) #0 {
25 %idx.ext = sext i32 %n to i64
26 %add.ptr = getelementptr inbounds i32, ptr %A, i64 %idx.ext
27 %cmp3.i = icmp eq i32 %n, 0
28 br i1 %cmp3.i, label %_ZSt10accumulateIPiiET0_T_S2_S1_.exit, label %for.body.i
30 for.body.i: ; preds = %entry, %for.body.i
31 %__init.addr.05.i = phi i32 [ %add.i, %for.body.i ], [ 0, %entry ]
32 %__first.addr.04.i = phi ptr [ %incdec.ptr.i, %for.body.i ], [ %A, %entry ]
33 %0 = load i32, ptr %__first.addr.04.i, align 4
34 %add.i = add nsw i32 %0, %__init.addr.05.i
35 %incdec.ptr.i = getelementptr inbounds i32, ptr %__first.addr.04.i, i64 1
36 %cmp.i = icmp eq ptr %incdec.ptr.i, %add.ptr
37 br i1 %cmp.i, label %_ZSt10accumulateIPiiET0_T_S2_S1_.exit, label %for.body.i
39 _ZSt10accumulateIPiiET0_T_S2_S1_.exit: ; preds = %for.body.i, %entry
40 %__init.addr.0.lcssa.i = phi i32 [ 0, %entry ], [ %add.i, %for.body.i ]
41 ret i32 %__init.addr.0.lcssa.i
44 ; This test checks that we don't vectorize loops that are marked with the "width" == 1 metadata.
45 ; CHECK-LABEL: @_Z4foo2Pii(
46 ; CHECK-NOT: <4 x i32>
47 ; CHECK: br i1 %{{.*}}, label %{{.*}}, label %for.body.i, !llvm.loop [[SCALAR_LOOP2:![0-9]+]]
49 define i32 @_Z4foo2Pii(ptr %A, i32 %n) #0 {
51 %idx.ext = sext i32 %n to i64
52 %add.ptr = getelementptr inbounds i32, ptr %A, i64 %idx.ext
53 %cmp3.i = icmp eq i32 %n, 0
54 br i1 %cmp3.i, label %_ZSt10accumulateIPiiET0_T_S2_S1_.exit, label %for.body.i
56 for.body.i: ; preds = %entry, %for.body.i
57 %__init.addr.05.i = phi i32 [ %add.i, %for.body.i ], [ 0, %entry ]
58 %__first.addr.04.i = phi ptr [ %incdec.ptr.i, %for.body.i ], [ %A, %entry ]
59 %0 = load i32, ptr %__first.addr.04.i, align 4
60 %add.i = add nsw i32 %0, %__init.addr.05.i
61 %incdec.ptr.i = getelementptr inbounds i32, ptr %__first.addr.04.i, i64 1
62 %cmp.i = icmp eq ptr %incdec.ptr.i, %add.ptr
63 br i1 %cmp.i, label %_ZSt10accumulateIPiiET0_T_S2_S1_.exit, label %for.body.i, !llvm.loop !0
65 _ZSt10accumulateIPiiET0_T_S2_S1_.exit: ; preds = %for.body.i, %entry
66 %__init.addr.0.lcssa.i = phi i32 [ 0, %entry ], [ %add.i, %for.body.i ]
67 ret i32 %__init.addr.0.lcssa.i
70 attributes #0 = { nounwind readonly ssp uwtable "fp-contract-model"="standard" "frame-pointer"="non-leaf" "realign-stack" "relocation-model"="pic" "ssp-buffers-size"="8" }
72 ; CHECK: [[VEC_LOOP1]] = distinct !{[[VEC_LOOP1]], [[MD_IS_VEC:![0-9]+]], [[MD_RT_UNROLL_DIS:![0-9]+]]}
73 ; CHECK-NEXT: [[MD_IS_VEC:![0-9]+]] = !{!"llvm.loop.isvectorized", i32 1}
74 ; CHECK-NEXT: [[MD_RT_UNROLL_DIS]] = !{!"llvm.loop.unroll.runtime.disable"}
75 ; CHECK-NEXT: [[SCALAR_LOOP1]] = distinct !{[[SCALAR_LOOP1]], [[MD_RT_UNROLL_DIS:![0-9]+]], [[MD_IS_VEC]]}
76 ; CHECK-NEXT: [[SCALAR_LOOP2]] = distinct !{[[SCALAR_LOOP2]], [[VEC_WIDTH_1:![0-9]+]]}
77 ; CHECK-NEXT: [[VEC_WIDTH_1]] = !{!"llvm.loop.vectorize.width", i32 1}
80 !1 = !{!"llvm.loop.vectorize.width", i32 1}