|
| 1 | +; RUN: rm -rf %t && mkdir %t && cd %t |
| 2 | + |
| 3 | +; Tests that devirtualization is suppressed on a class when the LTO unit doesn't |
| 4 | +; have the prevailing definition of the base class. |
| 5 | + |
| 6 | +; Generate unsplit module with summary for ThinLTO index-based WPD. |
| 7 | +; RUN: opt -thinlto-bc -o summary.o %s |
| 8 | + |
| 9 | +; Index based WPD |
| 10 | +; The callsite inside @_ZN4Base8dispatchEv gets devirtualized when symbol |
| 11 | +; resolution shows there is a prevailing definition of `_ZTI7Derived` in the |
| 12 | +; LTO unit. |
| 13 | +; RUN: llvm-lto2 run summary.o -save-temps -pass-remarks=. \ |
| 14 | +; RUN: -thinlto-threads=1 \ |
| 15 | +; RUN: -o tmp \ |
| 16 | +; RUN: --whole-program-visibility-enabled-in-lto=true \ |
| 17 | +; RUN: --validate-all-vtables-have-type-infos=true \ |
| 18 | +; RUN: --all-vtables-have-type-infos=true \ |
| 19 | +; RUN: -r=summary.o,_ZN4Base8dispatchEv,px \ |
| 20 | +; RUN: -r=summary.o,_ZN8DerivedN5printEv,px \ |
| 21 | +; RUN: -r=summary.o,_ZTV8DerivedN,p \ |
| 22 | +; RUN: -r=summary.o,_ZTI8DerivedN,p \ |
| 23 | +; RUN: -r=summary.o,_ZTS8DerivedN,p \ |
| 24 | +; RUN: -r=summary.o,_ZTI7Derived,p \ |
| 25 | +; RUN: 2>&1 | FileCheck --allow-empty %s --check-prefix=REMARK |
| 26 | + |
| 27 | + |
| 28 | +; Index based WPD |
| 29 | +; The callsite inside @_ZN4Base8dispatchEv remains indirect and not de-virtualized |
| 30 | +; when symbol resolution shows there isn't a prevailing definition of |
| 31 | +; `_ZTI7Derived` in the LTO unit. |
| 32 | +; RUN: llvm-lto2 run summary.o -save-temps -pass-remarks=. \ |
| 33 | +; RUN: -thinlto-threads=1 \ |
| 34 | +; RUN: -o tmp \ |
| 35 | +; RUN: --whole-program-visibility-enabled-in-lto=true \ |
| 36 | +; RUN: --validate-all-vtables-have-type-infos=true \ |
| 37 | +; RUN: --all-vtables-have-type-infos=true \ |
| 38 | +; RUN: -r=summary.o,_ZN4Base8dispatchEv,px \ |
| 39 | +; RUN: -r=summary.o,_ZN8DerivedN5printEv,px \ |
| 40 | +; RUN: -r=summary.o,_ZTV8DerivedN,p \ |
| 41 | +; RUN: -r=summary.o,_ZTI8DerivedN,p \ |
| 42 | +; RUN: -r=summary.o,_ZTS8DerivedN,p \ |
| 43 | +; RUN: -r=summary.o,_ZTI7Derived, \ |
| 44 | +; RUN: 2>&1 | FileCheck %s --allow-empty --implicit-check-not='single-impl: devirtualized a call to' |
| 45 | + |
| 46 | +; Repeat the above tests for WPD in hybrid LTO. |
| 47 | +; RUN: opt --thinlto-bc --thinlto-split-lto-unit -o hybrid.o %s |
| 48 | + |
| 49 | +; RUN: llvm-lto2 run hybrid.o -save-temps -pass-remarks=. \ |
| 50 | +; RUN: -thinlto-threads=1 \ |
| 51 | +; RUN: -o hybrid-tmp \ |
| 52 | +; RUN: --whole-program-visibility-enabled-in-lto=true \ |
| 53 | +; RUN: --validate-all-vtables-have-type-infos=true \ |
| 54 | +; RUN: --all-vtables-have-type-infos=true \ |
| 55 | +; RUN: -r=hybrid.o,_ZN4Base8dispatchEv,px \ |
| 56 | +; RUN: -r=hybrid.o,_ZN8DerivedN5printEv,px \ |
| 57 | +; RUN: -r=hybrid.o,_ZTV8DerivedN, \ |
| 58 | +; RUN: -r=hybrid.o,_ZTI8DerivedN, \ |
| 59 | +; RUN: -r=hybrid.o,_ZTS8DerivedN,p \ |
| 60 | +; RUN: -r=hybrid.o,_ZTI7Derived,p \ |
| 61 | +; RUN: -r=hybrid.o,_ZN8DerivedN5printEv, \ |
| 62 | +; RUN: -r=hybrid.o,_ZTV8DerivedN,p \ |
| 63 | +; RUN: -r=hybrid.o,_ZTI8DerivedN,p \ |
| 64 | +; RUN: 2>&1 | FileCheck --allow-empty %s --check-prefix=REMARK |
| 65 | + |
| 66 | + |
| 67 | +; RUN: llvm-lto2 run hybrid.o -save-temps -pass-remarks=. \ |
| 68 | +; RUN: -thinlto-threads=1 \ |
| 69 | +; RUN: -o hybrid-tmp \ |
| 70 | +; RUN: --whole-program-visibility-enabled-in-lto=true \ |
| 71 | +; RUN: --validate-all-vtables-have-type-infos=true \ |
| 72 | +; RUN: --all-vtables-have-type-infos=true \ |
| 73 | +; RUN: -r=hybrid.o,_ZN4Base8dispatchEv,px \ |
| 74 | +; RUN: -r=hybrid.o,_ZN8DerivedN5printEv,px \ |
| 75 | +; RUN: -r=hybrid.o,_ZTV8DerivedN, \ |
| 76 | +; RUN: -r=hybrid.o,_ZTI8DerivedN, \ |
| 77 | +; RUN: -r=hybrid.o,_ZTS8DerivedN,p \ |
| 78 | +; RUN: -r=hybrid.o,_ZTI7Derived, \ |
| 79 | +; RUN: -r=hybrid.o,_ZN8DerivedN5printEv, \ |
| 80 | +; RUN: -r=hybrid.o,_ZTV8DerivedN,p \ |
| 81 | +; RUN: -r=hybrid.o,_ZTI8DerivedN,p \ |
| 82 | +; RUN: 2>&1 | FileCheck --allow-empty %s --implicit-check-not='single-impl: devirtualized a call to' |
| 83 | + |
| 84 | + |
| 85 | +; Repeat the above tests for WPD in regular LTO. |
| 86 | +; RUN: opt -module-summary -o regular.o %s |
| 87 | + |
| 88 | +; RUN: llvm-lto2 run regular.o -save-temps -pass-remarks=. \ |
| 89 | +; RUN: -thinlto-threads=1 \ |
| 90 | +; RUN: -o regular-temp \ |
| 91 | +; RUN: --whole-program-visibility-enabled-in-lto=true \ |
| 92 | +; RUN: --validate-all-vtables-have-type-infos=true \ |
| 93 | +; RUN: --all-vtables-have-type-infos=true \ |
| 94 | +; RUN: -r=regular.o,_ZN4Base8dispatchEv,px \ |
| 95 | +; RUN: -r=regular.o,_ZN8DerivedN5printEv,px \ |
| 96 | +; RUN: -r=regular.o,_ZTS8DerivedN,p \ |
| 97 | +; RUN: -r=regular.o,_ZTI7Derived,p \ |
| 98 | +; RUN: -r=regular.o,_ZTV8DerivedN,p \ |
| 99 | +; RUN: -r=regular.o,_ZTI8DerivedN,p \ |
| 100 | +; RUN: 2>&1 | FileCheck --allow-empty %s --check-prefix=REMARK |
| 101 | + |
| 102 | +; RUN: llvm-lto2 run regular.o -save-temps -pass-remarks=. \ |
| 103 | +; RUN: -thinlto-threads=1 \ |
| 104 | +; RUN: -o regular-temp \ |
| 105 | +; RUN: --whole-program-visibility-enabled-in-lto=true \ |
| 106 | +; RUN: --validate-all-vtables-have-type-infos=true \ |
| 107 | +; RUN: --all-vtables-have-type-infos=true \ |
| 108 | +; RUN: -r=regular.o,_ZN4Base8dispatchEv,px \ |
| 109 | +; RUN: -r=regular.o,_ZN8DerivedN5printEv,px \ |
| 110 | +; RUN: -r=regular.o,_ZTS8DerivedN,p \ |
| 111 | +; RUN: -r=regular.o,_ZTI7Derived, \ |
| 112 | +; RUN: -r=regular.o,_ZTV8DerivedN,p \ |
| 113 | +; RUN: -r=regular.o,_ZTI8DerivedN,p \ |
| 114 | +; RUN: 2>&1 | FileCheck --allow-empty %s --implicit-check-not='single-impl: devirtualized a call to' |
| 115 | + |
| 116 | +; REMARK: single-impl: devirtualized a call to _ZN8DerivedN5printEv |
| 117 | + |
| 118 | +target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128" |
| 119 | +target triple = "x86_64-unknown-linux-gnu" |
| 120 | + |
| 121 | +@_ZTV8DerivedN = linkonce_odr hidden constant { [3 x ptr] } { [3 x ptr] [ptr null, ptr @_ZTI8DerivedN, ptr @_ZN8DerivedN5printEv] }, !type !0, !type !1, !type !2, !type !3, !vcall_visibility !4 |
| 122 | +@_ZTI8DerivedN = linkonce_odr hidden constant { ptr, ptr, ptr } { ptr null, ptr @_ZTS8DerivedN, ptr @_ZTI7Derived } |
| 123 | +@_ZTS8DerivedN = linkonce_odr hidden constant [10 x i8] c"8DerivedN\00", align 1 |
| 124 | +@_ZTI7Derived = external constant ptr |
| 125 | + |
| 126 | +; Whole program devirtualization will ignore summaries that are not live. |
| 127 | +; Mark '_ZTV8DerivedN' as used so it remains live. |
| 128 | +@llvm.used = appending global [1 x ptr] [ptr @_ZTV8DerivedN], section "llvm.metadata" |
| 129 | + |
| 130 | +define hidden void @_ZN4Base8dispatchEv(ptr %this) { |
| 131 | +entry: |
| 132 | + %this.addr = alloca ptr |
| 133 | + store ptr %this, ptr %this.addr |
| 134 | + %this1 = load ptr, ptr %this.addr |
| 135 | + %vtable = load ptr, ptr %this1 |
| 136 | + %0 = call i1 @llvm.type.test(ptr %vtable, metadata !"_ZTS7Derived") |
| 137 | + call void @llvm.assume(i1 %0) |
| 138 | + %vfn = getelementptr inbounds ptr, ptr %vtable, i64 0 |
| 139 | + %1 = load ptr, ptr %vfn |
| 140 | + call void %1(ptr %this1) |
| 141 | + ret void |
| 142 | +} |
| 143 | + |
| 144 | +define linkonce_odr hidden void @_ZN8DerivedN5printEv(ptr %this) #0 { |
| 145 | +entry: |
| 146 | + ret void |
| 147 | +} |
| 148 | + |
| 149 | +attributes #0 = { noinline optnone } |
| 150 | + |
| 151 | +declare i1 @llvm.type.test(ptr, metadata) |
| 152 | +declare void @llvm.assume(i1) |
| 153 | + |
| 154 | +!0 = !{i64 16, !"_ZTS7Derived"} |
| 155 | +!1 = !{i64 16, !"_ZTSM7DerivedFvvE.virtual"} |
| 156 | +!2 = !{i64 16, !"_ZTS8DerivedN"} |
| 157 | +!3 = !{i64 16, !"_ZTSM8DerivedNFvvE.virtual"} |
| 158 | +!4 = !{i64 0} |
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