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 15 define i32 @phi_load_metadata(%struct.S1* %s1, %struct.S2* %s2, i32 %c, i32** %x0, i32 **%x1) #0 { 16 entry: 17 %tobool = icmp eq i32 %c, 0 18 br i1 %tobool, label %if.end, label %if.then 19 20 if.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 26 if.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 32 return: ; 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
