| Arnold Schwaighofer | a2dd195 | 2013-06-27 15:11:55 +0000 | [diff] [blame^] | 1 | ; RUN: opt -S -loop-vectorize -force-vector-width=4 -force-vector-unroll=1 < %s | FileCheck %s |
| 2 | |
| 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" |
| 4 | |
| 5 | ; We use to fail on this loop because we did not properly handle the loop |
| 6 | ; invariant instruction anchored in the loop when used as a getelementptr index. |
| 7 | ; We would use the index from the original loop resulting in a use not dominated |
| 8 | ; by the definition. |
| 9 | |
| 10 | ; PR16452 |
| 11 | |
| 12 | ; Verify that we don't miscompile this loop. |
| 13 | |
| 14 | ; CHECK: @t |
| 15 | ; CHECK: <4 x i32> |
| 16 | |
| 17 | define void @t() { |
| 18 | entry: |
| 19 | br label %for.body |
| 20 | |
| 21 | for.body: |
| 22 | %indvars.iv17 = phi i64 [ %indvars.next, %for.body ], [ 128, %entry ] |
| 23 | |
| 24 | ; Loop invariant anchored in loop. |
| 25 | %idxprom21 = zext i32 undef to i64 |
| 26 | |
| 27 | %arrayidx23 = getelementptr inbounds [100 x [100 x i32]]* undef, i64 0, i64 %idxprom21, i64 %indvars.iv17 |
| 28 | store i32 undef, i32* %arrayidx23, align 4 |
| 29 | %indvars.next= add i64 %indvars.iv17, -1 |
| 30 | %0 = trunc i64 %indvars.next to i32 |
| 31 | %cmp15 = icmp ugt i32 %0, undef |
| 32 | br i1 %cmp15, label %for.body, label %loopexit |
| 33 | |
| 34 | loopexit: |
| 35 | ret void |
| 36 | } |