e61652a384
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
28 lines
1.0 KiB
LLVM
28 lines
1.0 KiB
LLVM
; This test makes sure a static var is not selected as a callee target
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; (which will crash compilation).
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; RUN: opt -module-summary %s -o %t.bc
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; RUN: opt -module-summary %p/Inputs/funcimport_var2.ll -o %t2.bc
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; RUN: llvm-lto -thinlto -thinlto-action=thinlink -o %t3 %t.bc %t2.bc
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; RUN: llvm-lto -thinlto -thinlto-action=import -thinlto-index=%t3 %t.bc %t2.bc
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; RUN: llvm-lto -thinlto -thinlto-action=run %t.bc %t2.bc -exported-symbol=_Z4LinkPKcS0_
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; RUN: llvm-nm %t.bc.thinlto.o | FileCheck %s
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; RUN: llvm-lto2 run %t.bc %t2.bc -o %t.out \
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; RUN: -r %t.bc,_Z4LinkPKcS0_,plx \
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; RUN: -r %t.bc,link,l \
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; RUN: -r %t2.bc,get_link,plx
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; RUN: llvm-nm %t.out.1 | FileCheck %s
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; CHECK: U link
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; REQUIRES: x86-registered-target
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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define i32 @_Z4LinkPKcS0_(i8*, i8*) local_unnamed_addr {
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%3 = tail call i32 @link(i8* %0, i8* %1) #2
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ret i32 %3
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}
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; Function Attrs: nounwind
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declare i32 @link(i8*, i8*) local_unnamed_addr
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