1 ; RUN: opt < %s -loop-vectorize -force-vector-unroll=1 -force-vector-width=4 -dce -instcombine -S | FileCheck %s 2 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" 4 target triple = "x86_64-apple-macosx10.9.0" 5 6 ; Make sure we vectorize this loop: 7 ; int foo(float *a, float *b, int n) { 8 ; for (int i=0; i<n; ++i) 9 ; a[i] = b[i] * 3; 10 ; } 11 12 ;CHECK: for.body.preheader: 13 ;CHECK: br i1 %cmp.zero, label %middle.block, label %vector.memcheck 14 ;CHECK: vector.memcheck: 15 ;CHECK: br i1 %memcheck.conflict, label %middle.block, label %vector.ph 16 ;CHECK: load <4 x float> 17 define i32 @foo(float* nocapture %a, float* nocapture %b, i32 %n) nounwind uwtable ssp { 18 entry: 19 %cmp6 = icmp sgt i32 %n, 0 20 br i1 %cmp6, label %for.body, label %for.end 21 22 for.body: ; preds = %entry, %for.body 23 %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ] 24 %arrayidx = getelementptr inbounds float* %b, i64 %indvars.iv 25 %0 = load float* %arrayidx, align 4 26 %mul = fmul float %0, 3.000000e+00 27 %arrayidx2 = getelementptr inbounds float* %a, i64 %indvars.iv 28 store float %mul, float* %arrayidx2, align 4 29 %indvars.iv.next = add i64 %indvars.iv, 1 30 %lftr.wideiv = trunc i64 %indvars.iv.next to i32 31 %exitcond = icmp eq i32 %lftr.wideiv, %n 32 br i1 %exitcond, label %for.end, label %for.body 33 34 for.end: ; preds = %for.body, %entry 35 ret i32 undef 36 } 37
