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-LABEL: @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 } 37
