1 ; RUN: opt < %s -loop-vectorize -force-vector-interleave=1 -force-vector-width=4 -dce -instcombine -S | FileCheck %s
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"
5 ;CHECK-LABEL: @read_mod_write_single_ptr(
6 ;CHECK: load <4 x float>
8 define i32 @read_mod_write_single_ptr(float* nocapture %a, i32 %n) nounwind uwtable ssp {
9 %1 = icmp sgt i32 %n, 0
10 br i1 %1, label %.lr.ph, label %._crit_edge
12 .lr.ph: ; preds = %0, %.lr.ph
13 %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %0 ]
14 %2 = getelementptr inbounds float, float* %a, i64 %indvars.iv
15 %3 = load float, float* %2, align 4
16 %4 = fmul float %3, 3.000000e+00
17 store float %4, float* %2, align 4
18 %indvars.iv.next = add i64 %indvars.iv, 1
19 %lftr.wideiv = trunc i64 %indvars.iv.next to i32
20 %exitcond = icmp eq i32 %lftr.wideiv, %n
21 br i1 %exitcond, label %._crit_edge, label %.lr.ph
23 ._crit_edge: ; preds = %.lr.ph, %0
27 ; Ensure that volatile stores are not vectorized.
28 ; CHECK-LABEL: @read_mod_write_single_ptr_volatile_store(
29 ; CHECK-NOT: store <4 x float>
31 define i32 @read_mod_write_single_ptr_volatile_store(float* nocapture %a, i32 %n) nounwind uwtable ssp {
32 %1 = icmp sgt i32 %n, 0
33 br i1 %1, label %.lr.ph, label %._crit_edge
35 .lr.ph: ; preds = %0, %.lr.ph
36 %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %0 ]
37 %2 = getelementptr inbounds float, float* %a, i64 %indvars.iv
38 %3 = load float, float* %2, align 4
39 %4 = fmul float %3, 3.000000e+00
40 store volatile float %4, float* %2, align 4
41 %indvars.iv.next = add i64 %indvars.iv, 1
42 %lftr.wideiv = trunc i64 %indvars.iv.next to i32
43 %exitcond = icmp eq i32 %lftr.wideiv, %n
44 br i1 %exitcond, label %._crit_edge, label %.lr.ph
46 ._crit_edge: ; preds = %.lr.ph, %0