1 ; RUN: opt < %s -loop-vectorize -force-vector-unroll=1 -force-vector-width=4 -enable-if-conversion -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 ; This is the loop in this example: 7 ; 8 ;int function0(int *a, int *b, int start, int end) { 9 ; 10 ; for (int i=start; i<end; ++i) { 11 ; unsigned k = a[i]; 12 ; 13 ; if (a[i] > b[i]) <------ notice the IF inside the loop. 14 ; k = k * 5 + 3; 15 ; 16 ; a[i] = k; <---- K is a phi node that becomes vector-select. 17 ; } 18 ;} 19 20 ;CHECK-LABEL: @function0( 21 ;CHECK: load <4 x i32> 22 ;CHECK: icmp sgt <4 x i32> 23 ;CHECK: mul <4 x i32> 24 ;CHECK: add <4 x i32> 25 ;CHECK: select <4 x i1> 26 ;CHECK: ret i32 27 define i32 @function0(i32* nocapture %a, i32* nocapture %b, i32 %start, i32 %end) nounwind uwtable ssp { 28 entry: 29 %cmp16 = icmp slt i32 %start, %end 30 br i1 %cmp16, label %for.body.lr.ph, label %for.end 31 32 for.body.lr.ph: 33 %0 = sext i32 %start to i64 34 br label %for.body 35 36 for.body: 37 %indvars.iv = phi i64 [ %0, %for.body.lr.ph ], [ %indvars.iv.next, %if.end ] 38 %arrayidx = getelementptr inbounds i32* %a, i64 %indvars.iv 39 %1 = load i32* %arrayidx, align 4 40 %arrayidx4 = getelementptr inbounds i32* %b, i64 %indvars.iv 41 %2 = load i32* %arrayidx4, align 4 42 %cmp5 = icmp sgt i32 %1, %2 43 br i1 %cmp5, label %if.then, label %if.end 44 45 if.then: 46 %mul = mul i32 %1, 5 47 %add = add i32 %mul, 3 48 br label %if.end 49 50 if.end: 51 %k.0 = phi i32 [ %add, %if.then ], [ %1, %for.body ] 52 store i32 %k.0, i32* %arrayidx, align 4 53 %indvars.iv.next = add i64 %indvars.iv, 1 54 %3 = trunc i64 %indvars.iv.next to i32 55 %cmp = icmp slt i32 %3, %end 56 br i1 %cmp, label %for.body, label %for.end 57 58 for.end: 59 ret i32 undef 60 } 61 62 63 64 ; int func(int *A, int n) { 65 ; unsigned sum = 0; 66 ; for (int i = 0; i < n; ++i) 67 ; if (A[i] > 30) 68 ; sum += A[i] + 2; 69 ; 70 ; return sum; 71 ; } 72 73 ;CHECK-LABEL: @reduction_func( 74 ;CHECK: load <4 x i32> 75 ;CHECK: icmp sgt <4 x i32> 76 ;CHECK: add <4 x i32> 77 ;CHECK: select <4 x i1> 78 ;CHECK: ret i32 79 define i32 @reduction_func(i32* nocapture %A, i32 %n) nounwind uwtable readonly ssp { 80 entry: 81 %cmp10 = icmp sgt i32 %n, 0 82 br i1 %cmp10, label %for.body, label %for.end 83 84 for.body: ; preds = %entry, %for.inc 85 %indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %entry ] 86 %sum.011 = phi i32 [ %sum.1, %for.inc ], [ 0, %entry ] 87 %arrayidx = getelementptr inbounds i32* %A, i64 %indvars.iv 88 %0 = load i32* %arrayidx, align 4 89 %cmp1 = icmp sgt i32 %0, 30 90 br i1 %cmp1, label %if.then, label %for.inc 91 92 if.then: ; preds = %for.body 93 %add = add i32 %sum.011, 2 94 %add4 = add i32 %add, %0 95 br label %for.inc 96 97 for.inc: ; preds = %for.body, %if.then 98 %sum.1 = phi i32 [ %add4, %if.then ], [ %sum.011, %for.body ] 99 %indvars.iv.next = add i64 %indvars.iv, 1 100 %lftr.wideiv = trunc i64 %indvars.iv.next to i32 101 %exitcond = icmp eq i32 %lftr.wideiv, %n 102 br i1 %exitcond, label %for.end, label %for.body 103 104 for.end: ; preds = %for.inc, %entry 105 %sum.0.lcssa = phi i32 [ 0, %entry ], [ %sum.1, %for.inc ] 106 ret i32 %sum.0.lcssa 107 } 108 109
