| ; RUN: opt -S -passes=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(ptr %p) { | |
| 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 0 to i64 | |
| %arrayidx23 = getelementptr inbounds [100 x [100 x i32]], ptr %p, i64 0, i64 %idxprom21, i64 %indvars.iv17 | |
| store i32 poison, ptr %arrayidx23, align 4 | |
| %indvars.next= add i64 %indvars.iv17, -1 | |
| %0 = trunc i64 %indvars.next to i32 | |
| %cmp15 = icmp ugt i32 %0, poison | |
| br i1 %cmp15, label %for.body, label %loopexit | |
| loopexit: | |
| ret void | |
| } |