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 3 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 10 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" 13 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 ; 22 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 29 30 for.body: 31 %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ] 32 %arrayidx = getelementptr inbounds float, float* %B, i64 %indvars.iv 33 %0 = load float, float* %arrayidx, align 4, !llvm.mem.parallel_loop_access !1 34 %arrayidx2 = getelementptr inbounds float, float* %A, i64 %indvars.iv 35 %1 = load float, 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 41 42 for.end: 43 ret void 44 } 45 46 !1 = !{!1, !2} 47 !2 = !{!"llvm.loop.vectorize.enable", i1 true} 48 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 55 56 for.body: 57 %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ] 58 %arrayidx = getelementptr inbounds float, float* %B, i64 %indvars.iv 59 %0 = load float, float* %arrayidx, align 4, !llvm.mem.parallel_loop_access !3 60 %arrayidx2 = getelementptr inbounds float, float* %A, i64 %indvars.iv 61 %1 = load float, 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 67 68 for.end: 69 ret void 70 } 71 72 !3 = !{!3} 73 74
