1 ; RUN: opt < %s -loop-vectorize -mtriple=x86_64-apple-macosx10.8.0 -mcpu=corei7-avx -force-vector-width=4 -force-vector-interleave=0 -dce -S \
2 ; RUN: | FileCheck %s --check-prefix=CHECK-VECTOR
3 ; RUN: opt < %s -loop-vectorize -mtriple=x86_64-apple-macosx10.8.0 -mcpu=corei7-avx -force-vector-width=1 -force-vector-interleave=0 -dce -S \
4 ; RUN: | FileCheck %s --check-prefix=CHECK-SCALAR
6 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"
7 target triple = "x86_64-apple-macosx10.8.0"
9 ; We don't unroll this loop because it has a small constant trip count.
11 ; CHECK-VECTOR-LABEL: @foo(
12 ; CHECK-VECTOR: load <4 x i32>
13 ; CHECK-VECTOR-NOT: load <4 x i32>
14 ; CHECK-VECTOR: store <4 x i32>
15 ; CHECK-VECTOR-NOT: store <4 x i32>
18 ; CHECK-SCALAR-LABEL: @foo(
19 ; CHECK-SCALAR: load i32*
20 ; CHECK-SCALAR-NOT: load i32*
21 ; CHECK-SCALAR: store i32
22 ; CHECK-SCALAR-NOT: store i32
24 define i32 @foo(i32* nocapture %A) nounwind uwtable ssp {
27 ; <label>:1 ; preds = %1, %0
28 %indvars.iv = phi i64 [ 0, %0 ], [ %indvars.iv.next, %1 ]
29 %2 = getelementptr inbounds i32, i32* %A, i64 %indvars.iv
30 %3 = load i32* %2, align 4
31 %4 = add nsw i32 %3, 6
32 store i32 %4, i32* %2, align 4
33 %indvars.iv.next = add i64 %indvars.iv, 1
34 %lftr.wideiv = trunc i64 %indvars.iv.next to i32
35 %exitcond = icmp eq i32 %lftr.wideiv, 100
36 br i1 %exitcond, label %5, label %1
38 ; <label>:5 ; preds = %1
42 ; But this is a good small loop to unroll as we don't know of a bound on its
45 ; CHECK-VECTOR-LABEL: @bar(
46 ; CHECK-VECTOR: store <4 x i32>
47 ; CHECK-VECTOR: store <4 x i32>
50 ; CHECK-SCALAR-LABEL: @bar(
51 ; CHECK-SCALAR: store i32
52 ; CHECK-SCALAR: store i32
54 define i32 @bar(i32* nocapture %A, i32 %n) nounwind uwtable ssp {
55 %1 = icmp sgt i32 %n, 0
56 br i1 %1, label %.lr.ph, label %._crit_edge
58 .lr.ph: ; preds = %0, %.lr.ph
59 %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %0 ]
60 %2 = getelementptr inbounds i32, i32* %A, i64 %indvars.iv
61 %3 = load i32* %2, align 4
62 %4 = add nsw i32 %3, 6
63 store i32 %4, i32* %2, align 4
64 %indvars.iv.next = add i64 %indvars.iv, 1
65 %lftr.wideiv = trunc i64 %indvars.iv.next to i32
66 %exitcond = icmp eq i32 %lftr.wideiv, %n
67 br i1 %exitcond, label %._crit_edge, label %.lr.ph
69 ._crit_edge: ; preds = %.lr.ph, %0
73 ; Also unroll if we need a runtime check but it was going to be added for
74 ; vectorization anyways.
75 ; CHECK-VECTOR-LABEL: @runtime_chk(
76 ; CHECK-VECTOR: store <4 x float>
77 ; CHECK-VECTOR: store <4 x float>
79 ; But not if the unrolling would introduce the runtime check.
80 ; CHECK-SCALAR-LABEL: @runtime_chk(
81 ; CHECK-SCALAR: store float
82 ; CHECK-SCALAR-NOT: store float
83 define void @runtime_chk(float* %A, float* %B, float %N) {
88 %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
89 %arrayidx = getelementptr inbounds float, float* %B, i64 %indvars.iv
90 %0 = load float* %arrayidx, align 4
91 %mul = fmul float %0, %N
92 %arrayidx2 = getelementptr inbounds float, float* %A, i64 %indvars.iv
93 store float %mul, float* %arrayidx2, align 4
94 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
95 %exitcond = icmp eq i64 %indvars.iv.next, 256
96 br i1 %exitcond, label %for.end, label %for.body