; RUN: opt -S -loop-reduce < %s | FileCheck %s ; Scaling factor in addressing mode are costly. ; Make loop-reduce prefer unscaled accesses. ; <rdar://problem/13806271> 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-n32:64-S128" target triple = "arm64-apple-ios7.0.0" ; Function Attrs: nounwind ssp define void @mulDouble(double* nocapture %a, double* nocapture %b, double* nocapture %c) { ; CHECK: @mulDouble entry: br label %for.body for.body: ; preds = %for.body, %entry ; CHECK: [[IV:%[^ ]+]] = phi i64 [ [[IVNEXT:%[^,]+]], %for.body ], [ 0, %entry ] ; Only one induction variable should have been generated. ; CHECK-NOT: phi %indvars.iv = phi i64 [ 1, %entry ], [ %indvars.iv.next, %for.body ] %tmp = add nsw i64 %indvars.iv, -1 %arrayidx = getelementptr inbounds double* %b, i64 %tmp %tmp1 = load double* %arrayidx, align 8 ; The induction variable should carry the scaling factor: 1 * 8 = 8. ; CHECK: [[IVNEXT]] = add nuw nsw i64 [[IV]], 8 %indvars.iv.next = add i64 %indvars.iv, 1 %arrayidx2 = getelementptr inbounds double* %c, i64 %indvars.iv.next %tmp2 = load double* %arrayidx2, align 8 %mul = fmul double %tmp1, %tmp2 %arrayidx4 = getelementptr inbounds double* %a, i64 %indvars.iv store double %mul, double* %arrayidx4, align 8 %lftr.wideiv = trunc i64 %indvars.iv.next to i32 ; Comparison should be 19 * 8 = 152. ; CHECK: icmp eq i32 {{%[^,]+}}, 152 %exitcond = icmp eq i32 %lftr.wideiv, 20 br i1 %exitcond, label %for.end, label %for.body for.end: ; preds = %for.body ret void }