1 ; RUN: opt < %s -loop-vectorize -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-macosx10.8.0" 5 6 @a = common global [2048 x i32] zeroinitializer, align 16 7 8 ; This is the loop. 9 ; for (i=0; i<n; i++){ 10 ; a[i] += i; 11 ; } 12 ;CHECK-LABEL: @inc( 13 ;CHECK: load <4 x i32> 14 ;CHECK: load <4 x i32> 15 ;CHECK: add nsw <4 x i32> 16 ;CHECK: add nsw <4 x i32> 17 ;CHECK: store <4 x i32> 18 ;CHECK: store <4 x i32> 19 ;CHECK: ret void 20 define void @inc(i32 %n) nounwind uwtable noinline ssp { 21 %1 = icmp sgt i32 %n, 0 22 br i1 %1, label %.lr.ph, label %._crit_edge 23 24 .lr.ph: ; preds = %0, %.lr.ph 25 %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %0 ] 26 %2 = getelementptr inbounds [2048 x i32]* @a, i64 0, i64 %indvars.iv 27 %3 = load i32* %2, align 4 28 %4 = trunc i64 %indvars.iv to i32 29 %5 = add nsw i32 %3, %4 30 store i32 %5, i32* %2, align 4 31 %indvars.iv.next = add i64 %indvars.iv, 1 32 %lftr.wideiv = trunc i64 %indvars.iv.next to i32 33 %exitcond = icmp eq i32 %lftr.wideiv, %n 34 br i1 %exitcond, label %._crit_edge, label %.lr.ph, !llvm.loop !0 35 36 ._crit_edge: ; preds = %.lr.ph, %0 37 ret void 38 } 39 40 !0 = metadata !{metadata !0, metadata !1} 41 !1 = metadata !{metadata !"llvm.loop.vectorize.unroll", i32 2} 42
