1; RUN: opt -instcombine -S < %s | FileCheck %s 2 3@g1 = common global i32* null, align 8 4 5%struct.S1 = type { i32, float } 6%struct.S2 = type { float, i32 } 7 8; Check that instcombine preserves metadata when it merges two loads. 9; 10; CHECK: return: 11; CHECK: load i32*, i32** %{{[a-z0-9.]+}}, align 8, !nonnull ![[EMPTYNODE:[0-9]+]] 12; CHECK: load i32, i32* %{{[a-z0-9.]+}}, align 4, !tbaa ![[TBAA:[0-9]+]], !range ![[RANGE:[0-9]+]], !invariant.load ![[EMPTYNODE:[0-9]+]], !alias.scope ![[ALIAS_SCOPE:[0-9]+]], !noalias ![[NOALIAS:[0-9]+]] 13 14; Function Attrs: nounwind ssp uwtable 15define i32 @phi_load_metadata(%struct.S1* %s1, %struct.S2* %s2, i32 %c, i32** %x0, i32 **%x1) #0 { 16entry: 17 %tobool = icmp eq i32 %c, 0 18 br i1 %tobool, label %if.end, label %if.then 19 20if.then: ; preds = %entry 21 %i = getelementptr inbounds %struct.S2, %struct.S2* %s2, i64 0, i32 1 22 %val = load i32, i32* %i, align 4, !tbaa !0, !alias.scope !13, !noalias !14, !invariant.load !17, !range !18 23 %p0 = load i32*, i32** %x0, align 8, !nonnull !17 24 br label %return 25 26if.end: ; preds = %entry 27 %i2 = getelementptr inbounds %struct.S1, %struct.S1* %s1, i64 0, i32 0 28 %val2 = load i32, i32* %i2, align 4, !tbaa !2, !alias.scope !15, !noalias !16, !invariant.load !17, !range !19 29 %p1 = load i32*, i32** %x1, align 8, !nonnull !17 30 br label %return 31 32return: ; preds = %if.end, %if.then 33 %retval = phi i32 [ %val, %if.then ], [ %val2, %if.end ] 34 %pval = phi i32* [ %p0, %if.then ], [ %p1, %if.end ] 35 store i32* %pval, i32** @g1, align 8 36 ret i32 %retval 37} 38 39; CHECK: ![[EMPTYNODE]] = !{} 40; CHECK: ![[TBAA]] = !{![[TAG1:[0-9]+]], ![[TAG1]], i64 0} 41; CHECK: ![[TAG1]] = !{!"int", !{{[0-9]+}}, i64 0} 42; CHECK: ![[RANGE]] = !{i32 10, i32 25} 43; CHECK: ![[ALIAS_SCOPE]] = !{![[SCOPE0:[0-9]+]], ![[SCOPE1:[0-9]+]], ![[SCOPE2:[0-9]+]]} 44; CHECK: ![[SCOPE0]] = distinct !{![[SCOPE0]], !{{[0-9]+}}, !"scope0"} 45; CHECK: ![[SCOPE1]] = distinct !{![[SCOPE1]], !{{[0-9]+}}, !"scope1"} 46; CHECK: ![[SCOPE2]] = distinct !{![[SCOPE2]], !{{[0-9]+}}, !"scope2"} 47; CHECK: ![[NOALIAS]] = !{![[SCOPE3:[0-9]+]]} 48; CHECK: ![[SCOPE3]] = distinct !{![[SCOPE3]], !{{[0-9]+}}, !"scope3"} 49 50!0 = !{!1, !4, i64 4} 51!1 = !{!"", !7, i64 0, !4, i64 4} 52!2 = !{!3, !4, i64 0} 53!3 = !{!"", !4, i64 0, !7, i64 4} 54!4 = !{!"int", !5, i64 0} 55!5 = !{!"omnipotent char", !6, i64 0} 56!6 = !{!"Simple C/C++ TBAA"} 57!7 = !{!"float", !5, i64 0} 58!8 = !{!8, !"some domain"} 59!9 = !{!9, !8, !"scope0"} 60!10 = !{!10, !8, !"scope1"} 61!11 = !{!11, !8, !"scope2"} 62!12 = !{!12, !8, !"scope3"} 63!13 = !{!9, !10} 64!14 = !{!11, !12} 65!15 = !{!9, !11} 66!16 = !{!10, !12} 67!17 = !{} 68!18 = !{i32 10, i32 20} 69!19 = !{i32 15, i32 25} 70