derek.holloway
7502bf64a4
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159 lines
6.3 KiB
LLVM
159 lines
6.3 KiB
LLVM
; RUN: rm -rf %t && mkdir %t && cd %t
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; Tests that devirtualization is suppressed on a class when the LTO unit doesn't
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; have the prevailing definition of the base class.
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; Generate unsplit module with summary for ThinLTO index-based WPD.
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; RUN: opt -thinlto-bc -o summary.o %s
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; Index based WPD
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; The callsite inside @_ZN4Base8dispatchEv gets devirtualized when symbol
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; resolution shows there is a prevailing definition of `_ZTI7Derived` in the
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; LTO unit.
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; RUN: llvm-lto2 run summary.o -save-temps -pass-remarks=. \
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; RUN: -thinlto-threads=1 \
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; RUN: -o tmp \
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; RUN: --whole-program-visibility-enabled-in-lto=true \
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; RUN: --validate-all-vtables-have-type-infos=true \
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; RUN: --all-vtables-have-type-infos=true \
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; RUN: -r=summary.o,_ZN4Base8dispatchEv,px \
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; RUN: -r=summary.o,_ZN8DerivedN5printEv,px \
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; RUN: -r=summary.o,_ZTV8DerivedN,p \
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; RUN: -r=summary.o,_ZTI8DerivedN,p \
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; RUN: -r=summary.o,_ZTS8DerivedN,p \
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; RUN: -r=summary.o,_ZTI7Derived,p \
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; RUN: 2>&1 | FileCheck --allow-empty %s --check-prefix=REMARK
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; Index based WPD
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; The callsite inside @_ZN4Base8dispatchEv remains indirect and not de-virtualized
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; when symbol resolution shows there isn't a prevailing definition of
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; `_ZTI7Derived` in the LTO unit.
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; RUN: llvm-lto2 run summary.o -save-temps -pass-remarks=. \
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; RUN: -thinlto-threads=1 \
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; RUN: -o tmp \
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; RUN: --whole-program-visibility-enabled-in-lto=true \
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; RUN: --validate-all-vtables-have-type-infos=true \
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; RUN: --all-vtables-have-type-infos=true \
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; RUN: -r=summary.o,_ZN4Base8dispatchEv,px \
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; RUN: -r=summary.o,_ZN8DerivedN5printEv,px \
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; RUN: -r=summary.o,_ZTV8DerivedN,p \
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; RUN: -r=summary.o,_ZTI8DerivedN,p \
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; RUN: -r=summary.o,_ZTS8DerivedN,p \
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; RUN: -r=summary.o,_ZTI7Derived, \
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; RUN: 2>&1 | FileCheck %s --allow-empty --implicit-check-not='single-impl: devirtualized a call to'
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; Repeat the above tests for WPD in hybrid LTO.
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; RUN: opt --thinlto-bc --thinlto-split-lto-unit -o hybrid.o %s
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; RUN: llvm-lto2 run hybrid.o -save-temps -pass-remarks=. \
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; RUN: -thinlto-threads=1 \
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; RUN: -o hybrid-tmp \
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; RUN: --whole-program-visibility-enabled-in-lto=true \
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; RUN: --validate-all-vtables-have-type-infos=true \
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; RUN: --all-vtables-have-type-infos=true \
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; RUN: -r=hybrid.o,_ZN4Base8dispatchEv,px \
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; RUN: -r=hybrid.o,_ZN8DerivedN5printEv,px \
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; RUN: -r=hybrid.o,_ZTV8DerivedN, \
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; RUN: -r=hybrid.o,_ZTI8DerivedN, \
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; RUN: -r=hybrid.o,_ZTS8DerivedN,p \
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; RUN: -r=hybrid.o,_ZTI7Derived,p \
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; RUN: -r=hybrid.o,_ZN8DerivedN5printEv, \
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; RUN: -r=hybrid.o,_ZTV8DerivedN,p \
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; RUN: -r=hybrid.o,_ZTI8DerivedN,p \
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; RUN: 2>&1 | FileCheck --allow-empty %s --check-prefix=REMARK
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; RUN: llvm-lto2 run hybrid.o -save-temps -pass-remarks=. \
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; RUN: -thinlto-threads=1 \
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; RUN: -o hybrid-tmp \
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; RUN: --whole-program-visibility-enabled-in-lto=true \
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; RUN: --validate-all-vtables-have-type-infos=true \
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; RUN: --all-vtables-have-type-infos=true \
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; RUN: -r=hybrid.o,_ZN4Base8dispatchEv,px \
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; RUN: -r=hybrid.o,_ZN8DerivedN5printEv,px \
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; RUN: -r=hybrid.o,_ZTV8DerivedN, \
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; RUN: -r=hybrid.o,_ZTI8DerivedN, \
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; RUN: -r=hybrid.o,_ZTS8DerivedN,p \
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; RUN: -r=hybrid.o,_ZTI7Derived, \
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; RUN: -r=hybrid.o,_ZN8DerivedN5printEv, \
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; RUN: -r=hybrid.o,_ZTV8DerivedN,p \
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; RUN: -r=hybrid.o,_ZTI8DerivedN,p \
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; RUN: 2>&1 | FileCheck --allow-empty %s --implicit-check-not='single-impl: devirtualized a call to'
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; Repeat the above tests for WPD in regular LTO.
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; RUN: opt -module-summary -o regular.o %s
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; RUN: llvm-lto2 run regular.o -save-temps -pass-remarks=. \
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; RUN: -thinlto-threads=1 \
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; RUN: -o regular-temp \
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; RUN: --whole-program-visibility-enabled-in-lto=true \
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; RUN: --validate-all-vtables-have-type-infos=true \
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; RUN: --all-vtables-have-type-infos=true \
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; RUN: -r=regular.o,_ZN4Base8dispatchEv,px \
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; RUN: -r=regular.o,_ZN8DerivedN5printEv,px \
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; RUN: -r=regular.o,_ZTS8DerivedN,p \
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; RUN: -r=regular.o,_ZTI7Derived,p \
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; RUN: -r=regular.o,_ZTV8DerivedN,p \
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; RUN: -r=regular.o,_ZTI8DerivedN,p \
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; RUN: 2>&1 | FileCheck --allow-empty %s --check-prefix=REMARK
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; RUN: llvm-lto2 run regular.o -save-temps -pass-remarks=. \
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; RUN: -thinlto-threads=1 \
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; RUN: -o regular-temp \
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; RUN: --whole-program-visibility-enabled-in-lto=true \
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; RUN: --validate-all-vtables-have-type-infos=true \
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; RUN: --all-vtables-have-type-infos=true \
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; RUN: -r=regular.o,_ZN4Base8dispatchEv,px \
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; RUN: -r=regular.o,_ZN8DerivedN5printEv,px \
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; RUN: -r=regular.o,_ZTS8DerivedN,p \
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; RUN: -r=regular.o,_ZTI7Derived, \
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; RUN: -r=regular.o,_ZTV8DerivedN,p \
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; RUN: -r=regular.o,_ZTI8DerivedN,p \
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; RUN: 2>&1 | FileCheck --allow-empty %s --implicit-check-not='single-impl: devirtualized a call to'
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; REMARK: single-impl: devirtualized a call to _ZN8DerivedN5printEv
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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"
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target triple = "x86_64-unknown-linux-gnu"
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@_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
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@_ZTI8DerivedN = linkonce_odr hidden constant { ptr, ptr, ptr } { ptr null, ptr @_ZTS8DerivedN, ptr @_ZTI7Derived }
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@_ZTS8DerivedN = linkonce_odr hidden constant [10 x i8] c"8DerivedN\00", align 1
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@_ZTI7Derived = external constant ptr
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; Whole program devirtualization will ignore summaries that are not live.
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; Mark '_ZTV8DerivedN' as used so it remains live.
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@llvm.used = appending global [1 x ptr] [ptr @_ZTV8DerivedN], section "llvm.metadata"
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define hidden void @_ZN4Base8dispatchEv(ptr %this) {
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entry:
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%this.addr = alloca ptr
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store ptr %this, ptr %this.addr
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%this1 = load ptr, ptr %this.addr
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%vtable = load ptr, ptr %this1
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%0 = call i1 @llvm.type.test(ptr %vtable, metadata !"_ZTS7Derived")
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call void @llvm.assume(i1 %0)
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%vfn = getelementptr inbounds ptr, ptr %vtable, i64 0
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%1 = load ptr, ptr %vfn
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call void %1(ptr %this1)
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ret void
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}
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define linkonce_odr hidden void @_ZN8DerivedN5printEv(ptr %this) #0 {
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entry:
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ret void
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}
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attributes #0 = { noinline optnone }
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declare i1 @llvm.type.test(ptr, metadata)
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declare void @llvm.assume(i1)
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!0 = !{i64 16, !"_ZTS7Derived"}
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!1 = !{i64 16, !"_ZTSM7DerivedFvvE.virtual"}
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!2 = !{i64 16, !"_ZTS8DerivedN"}
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!3 = !{i64 16, !"_ZTSM8DerivedNFvvE.virtual"}
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!4 = !{i64 0}
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