1 ; RUN: opt < %s -loop-vectorize -mtriple=x86_64-apple-macosx10.8.0 -mcpu=corei7-avx -debug-only=loop-vectorize -stats -S -vectorizer-min-trip-count=21 2>&1 | FileCheck %s
2 ; REQUIRES: asserts
4 ; CHECK: LV: Loop hints: force=enabled
5 ; CHECK: LV: Loop hints: force=?
6 ; No more loops in the module
7 ; CHECK-NOT: LV: Loop hints: force=
8 ; CHECK: 2 loop-vectorize - Number of loops analyzed for vectorization
9 ; CHECK: 1 loop-vectorize - Number of loops vectorized
11 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"
12 target triple = "x86_64-apple-macosx10.8.0"
14 ;
15 ; The source code for the test:
16 ;
17 ; void foo(float* restrict A, float* restrict B)
18 ; {
19 ; for (int i = 0; i < 20; ++i) A[i] += B[i];
20 ; }
21 ;
23 ;
24 ; This loop will be vectorized, although the trip count is below the threshold, but vectorization is explicitly forced in metadata.
25 ;
26 define void @vectorized(float* noalias nocapture %A, float* noalias nocapture readonly %B) {
27 entry:
28 br label %for.body
30 for.body:
31 %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
32 %arrayidx = getelementptr inbounds float* %B, i64 %indvars.iv
33 %0 = load float* %arrayidx, align 4, !llvm.mem.parallel_loop_access !1
34 %arrayidx2 = getelementptr inbounds float* %A, i64 %indvars.iv
35 %1 = load float* %arrayidx2, align 4, !llvm.mem.parallel_loop_access !1
36 %add = fadd fast float %0, %1
37 store float %add, float* %arrayidx2, align 4, !llvm.mem.parallel_loop_access !1
38 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
39 %exitcond = icmp eq i64 %indvars.iv.next, 20
40 br i1 %exitcond, label %for.end, label %for.body, !llvm.loop !1
42 for.end:
43 ret void
44 }
46 !1 = !{!1, !2}
47 !2 = !{!"llvm.loop.vectorize.enable", i1 true}
49 ;
50 ; This loop will not be vectorized as the trip count is below the threshold.
51 ;
52 define void @not_vectorized(float* noalias nocapture %A, float* noalias nocapture readonly %B) {
53 entry:
54 br label %for.body
56 for.body:
57 %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
58 %arrayidx = getelementptr inbounds float* %B, i64 %indvars.iv
59 %0 = load float* %arrayidx, align 4, !llvm.mem.parallel_loop_access !3
60 %arrayidx2 = getelementptr inbounds float* %A, i64 %indvars.iv
61 %1 = load float* %arrayidx2, align 4, !llvm.mem.parallel_loop_access !3
62 %add = fadd fast float %0, %1
63 store float %add, float* %arrayidx2, align 4, !llvm.mem.parallel_loop_access !3
64 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
65 %exitcond = icmp eq i64 %indvars.iv.next, 20
66 br i1 %exitcond, label %for.end, label %for.body, !llvm.loop !3
68 for.end:
69 ret void
70 }
72 !3 = !{!3}