1 ; RUN: opt -basicaa -loop-vectorize -enable-mem-access-versioning -force-vector-width=2 -force-vector-interleave=1 < %s -S | FileCheck %s 2 3 target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" 4 5 ; Check that we version this loop with speculating the value 1 for symbolic 6 ; strides. This also checks that the symbolic stride information is correctly 7 ; propagated to the memcheck generation. Without this the loop wouldn't 8 ; vectorize because we couldn't determine the array bounds for the required 9 ; memchecks. 10 11 ; CHECK-LABEL: test 12 define void @test(i32* %A, i64 %AStride, 13 i32* %B, i32 %BStride, 14 i32* %C, i64 %CStride, i32 %N) { 15 entry: 16 %cmp13 = icmp eq i32 %N, 0 17 br i1 %cmp13, label %for.end, label %for.body.preheader 18 19 ; CHECK-DAG: icmp ne i64 %AStride, 1 20 ; CHECK-DAG: icmp ne i32 %BStride, 1 21 ; CHECK-DAG: icmp ne i64 %CStride, 1 22 ; CHECK: or 23 ; CHECK: or 24 ; CHECK: br 25 26 ; CHECK: vector.body 27 ; CHECK: load <2 x i32> 28 29 for.body.preheader: 30 br label %for.body 31 32 for.body: 33 %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %for.body.preheader ] 34 %iv.trunc = trunc i64 %indvars.iv to i32 35 %mul = mul i32 %iv.trunc, %BStride 36 %mul64 = zext i32 %mul to i64 37 %arrayidx = getelementptr inbounds i32, i32* %B, i64 %mul64 38 %0 = load i32, i32* %arrayidx, align 4 39 %mul2 = mul nsw i64 %indvars.iv, %CStride 40 %arrayidx3 = getelementptr inbounds i32, i32* %C, i64 %mul2 41 %1 = load i32, i32* %arrayidx3, align 4 42 %mul4 = mul nsw i32 %1, %0 43 %mul3 = mul nsw i64 %indvars.iv, %AStride 44 %arrayidx7 = getelementptr inbounds i32, i32* %A, i64 %mul3 45 store i32 %mul4, i32* %arrayidx7, align 4 46 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 47 %lftr.wideiv = trunc i64 %indvars.iv.next to i32 48 %exitcond = icmp eq i32 %lftr.wideiv, %N 49 br i1 %exitcond, label %for.end.loopexit, label %for.body 50 51 for.end.loopexit: 52 br label %for.end 53 54 for.end: 55 ret void 56 } 57 58 ; We used to crash on this function because we removed the fptosi cast when 59 ; replacing the symbolic stride '%conv'. 60 ; PR18480 61 62 ; CHECK-LABEL: fn1 63 ; CHECK: load <2 x double> 64 65 define void @fn1(double* noalias %x, double* noalias %c, double %a) { 66 entry: 67 %conv = fptosi double %a to i32 68 %cmp8 = icmp sgt i32 %conv, 0 69 br i1 %cmp8, label %for.body.preheader, label %for.end 70 71 for.body.preheader: 72 br label %for.body 73 74 for.body: 75 %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %for.body.preheader ] 76 %0 = trunc i64 %indvars.iv to i32 77 %mul = mul nsw i32 %0, %conv 78 %idxprom = sext i32 %mul to i64 79 %arrayidx = getelementptr inbounds double, double* %x, i64 %idxprom 80 %1 = load double, double* %arrayidx, align 8 81 %arrayidx3 = getelementptr inbounds double, double* %c, i64 %indvars.iv 82 store double %1, double* %arrayidx3, align 8 83 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 84 %lftr.wideiv = trunc i64 %indvars.iv.next to i32 85 %exitcond = icmp eq i32 %lftr.wideiv, %conv 86 br i1 %exitcond, label %for.end.loopexit, label %for.body 87 88 for.end.loopexit: 89 br label %for.end 90 91 for.end: 92 ret void 93 } 94
