| ; RUN: opt -S -loop-vectorize -force-vector-width=4 -force-vector-interleave=1 < %s | FileCheck %s |
| |
| 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" |
| |
| ; We use to fail on this loop because we did not properly handle the loop |
| ; invariant instruction anchored in the loop when used as a getelementptr index. |
| ; We would use the index from the original loop resulting in a use not dominated |
| ; by the definition. |
| |
| ; PR16452 |
| |
| ; Verify that we don't miscompile this loop. |
| |
| ; CHECK-LABEL: @t( |
| ; CHECK: <4 x i32> |
| |
| define void @t() { |
| entry: |
| br label %for.body |
| |
| for.body: |
| %indvars.iv17 = phi i64 [ %indvars.next, %for.body ], [ 128, %entry ] |
| |
| ; Loop invariant anchored in loop. |
| %idxprom21 = zext i32 undef to i64 |
| |
| %arrayidx23 = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* undef, i64 0, i64 %idxprom21, i64 %indvars.iv17 |
| store i32 undef, i32* %arrayidx23, align 4 |
| %indvars.next= add i64 %indvars.iv17, -1 |
| %0 = trunc i64 %indvars.next to i32 |
| %cmp15 = icmp ugt i32 %0, undef |
| br i1 %cmp15, label %for.body, label %loopexit |
| |
| loopexit: |
| ret void |
| } |
