forked from OSchip/llvm-project
39 lines
1.7 KiB
LLVM
39 lines
1.7 KiB
LLVM
; 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
|
|
}
|