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d61dc6f44b
Summary: This fixes PR 37422 In ELF, non-weak symbols can also be non-prevailing. In this particular PR, the __llvm_profile_* symbols are non-prevailing but weren't getting dropped - causing multiply-defined errors with lld. Also add a test, strong_non_prevailing.ll, to ensure that multiple copies of a strong symbol are dropped. To fix the test regressions exposed by this fix, - do not mark prevailing copies for symbols with 'appending' linkage. There's no one prevailing copy for such symbols. - fix the prevailing version in dead-strip-fulllto.ll - explicitly pass exported symbols to llvm-lto in fumcimport.ll and funcimport_var.ll Reviewers: tejohnson, pcc Subscribers: mehdi_amini, inglorion, eraman, steven_wu, dexonsmith, dang, srhines, llvm-commits Differential Revision: https://reviews.llvm.org/D54125 llvm-svn: 346436
146 lines
4.6 KiB
LLVM
146 lines
4.6 KiB
LLVM
; Do setup work for all below tests: generate bitcode and combined index
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; RUN: opt -module-summary %s -o %t.bc
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; RUN: opt -module-summary %p/Inputs/funcimport.ll -o %t2.bc
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; RUN: llvm-lto -thinlto-action=thinlink -o %t3.bc %t.bc %t2.bc
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; RUN: llvm-lto -thinlto-index-stats %t3.bc | FileCheck %s -check-prefix=STATS
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; STATS: Index {{.*}} contains 24 nodes (13 functions, 3 alias, 8 globals) and 19 edges (8 refs and 11 calls)
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; Ensure statics are promoted/renamed correctly from this file (all but
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; constant variable need promotion).
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; RUN: llvm-lto -thinlto-action=promote %t.bc -thinlto-index=%t3.bc -o - | llvm-dis -o - | FileCheck %s --check-prefix=EXPORTSTATIC
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; EXPORTSTATIC-DAG: @staticvar.llvm.0 = hidden global
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; Eventually @staticconstvar can be exported as a copy and not promoted
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; EXPORTSTATIC-DAG: @staticconstvar.llvm.0 = hidden unnamed_addr constant
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; EXPORTSTATIC-DAG: @P.llvm.0 = hidden global void ()* null
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; EXPORTSTATIC-DAG: define hidden i32 @staticfunc.llvm.0
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; EXPORTSTATIC-DAG: define hidden void @staticfunc2.llvm.0
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; Ensure that weak alias to an imported function is correctly turned into
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; a declaration.
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; Also ensures that alias to a linkonce function is turned into a declaration
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; and that the associated linkonce function is not in the output, as it is
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; lazily linked and never referenced/materialized.
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; RUN: llvm-lto -thinlto-action=import %t2.bc -thinlto-index=%t3.bc -o - | llvm-dis -o - | FileCheck %s --check-prefix=IMPORTGLOB1
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; IMPORTGLOB1-DAG: define available_externally void @globalfunc1
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; IMPORTGLOB1-DAG: declare void @weakalias
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; IMPORTGLOB1-NOT: @linkoncealias
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; IMPORTGLOB1-NOT: @linkoncefunc
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; A strong alias is imported as an available_externally copy of its aliasee.
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; IMPORTGLOB1-DAG: define available_externally void @analias
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; IMPORTGLOB1-NOT: declare void @globalfunc2
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; Verify that the optimizer run
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; RUN: llvm-lto -thinlto-action=optimize %t2.bc -o - | llvm-dis -o - | FileCheck %s --check-prefix=OPTIMIZED
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; OPTIMIZED: define i32 @main()
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; Verify that the codegen run
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; RUN: llvm-lto -thinlto-action=codegen %t2.bc -o - | llvm-nm -o - | FileCheck %s --check-prefix=CODEGEN
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; CODEGEN: T _main
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; Verify that all run together
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; RUN: llvm-lto -thinlto-action=run %t2.bc %t.bc -exported-symbol=_main
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; RUN: llvm-nm -o - < %t.bc.thinlto.o | FileCheck %s --check-prefix=ALL
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; RUN: llvm-nm -o - < %t2.bc.thinlto.o | FileCheck %s --check-prefix=ALL2
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; ALL: T _callfuncptr
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; ALL2: T _main
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.11.0"
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@globalvar_in_section = global i32 1, align 4
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@globalvar = global i32 1, align 4
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@staticvar = internal global i32 1, align 4
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@staticvar2 = internal global i32 1, align 4
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@staticconstvar = internal unnamed_addr constant [2 x i32] [i32 10, i32 20], align 4
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@commonvar = common global i32 0, align 4
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@P = internal global void ()* null, align 8
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@weakalias = weak alias void (...), bitcast (void ()* @globalfunc1 to void (...)*)
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@analias = alias void (...), bitcast (void ()* @globalfunc2 to void (...)*)
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@linkoncealias = alias void (...), bitcast (void ()* @linkoncefunc to void (...)*)
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define void @globalfunc1() #0 {
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entry:
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ret void
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}
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define void @globalfunc2() #0 {
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entry:
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ret void
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}
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define linkonce_odr void @linkoncefunc() #0 {
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entry:
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ret void
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}
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define i32 @referencestatics(i32 %i) #0 {
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entry:
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%i.addr = alloca i32, align 4
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store i32 %i, i32* %i.addr, align 4
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%call = call i32 @staticfunc()
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%0 = load i32, i32* @staticvar, align 4
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%add = add nsw i32 %call, %0
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%1 = load i32, i32* %i.addr, align 4
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%idxprom = sext i32 %1 to i64
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%arrayidx = getelementptr inbounds [2 x i32], [2 x i32]* @staticconstvar, i64 0, i64 %idxprom
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%2 = load i32, i32* %arrayidx, align 4
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%add1 = add nsw i32 %add, %2
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ret i32 %add1
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}
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define i32 @referenceglobals(i32 %i) #0 {
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entry:
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%i.addr = alloca i32, align 4
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store i32 %i, i32* %i.addr, align 4
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call void @globalfunc1()
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%0 = load i32, i32* @globalvar, align 4
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ret i32 %0
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}
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define i32 @referencecommon(i32 %i) #0 {
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entry:
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%i.addr = alloca i32, align 4
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store i32 %i, i32* %i.addr, align 4
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%0 = load i32, i32* @commonvar, align 4
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ret i32 %0
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}
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define void @setfuncptr() #0 {
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entry:
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store void ()* @staticfunc2, void ()** @P, align 8
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ret void
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}
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define void @callfuncptr() #0 {
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entry:
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%0 = load void ()*, void ()** @P, align 8
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call void %0()
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ret void
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}
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@weakvar = weak global i32 1, align 4
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define weak void @weakfunc() #0 {
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entry:
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ret void
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}
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define void @callweakfunc() #0 {
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entry:
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call void @weakfunc()
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ret void
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}
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define internal i32 @staticfunc() #0 {
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entry:
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ret i32 1
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}
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define internal void @staticfunc2() #0 {
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entry:
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%0 = load i32, i32* @staticvar2, align 4
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ret void
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}
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