1 ; RUN: opt -tbaa -basicaa -gvn -S < %s | FileCheck %s 2 3 target datalayout = "e-p:64:64:64" 4 5 ; GVN should preserve the TBAA tag on loads when doing PRE. 6 7 ; CHECK: @test 8 ; CHECK: %tmp33.pre = load i16* %P, align 2, !tbaa !0 9 ; CHECK: br label %for.body 10 define void @test(i16 *%P, i16* %Q) nounwind { 11 entry: 12 br i1 undef, label %bb.nph, label %for.end 13 14 bb.nph: ; preds = %entry 15 br label %for.body 16 17 for.body: ; preds = %for.body, %bb.nph 18 %tmp33 = load i16* %P, align 2, !tbaa !0 19 store i16 %tmp33, i16* %Q 20 21 store i16 0, i16* %P, align 2, !tbaa !0 22 br i1 false, label %for.end, label %for.body 23 24 for.end: ; preds = %for.body, %entry 25 ret void 26 } 27 28 !0 = metadata !{metadata !"short", metadata !1} 29 !1 = metadata !{metadata !"omnipotent char", metadata !2} 30 !2 = metadata !{metadata !"Simple C/C++ TBAA", null} 31
