74 lines
2.1 KiB
Text
74 lines
2.1 KiB
Text
REQUIRES: x86
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;; This checks a case when an archive contains a bitcode and a regular object
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;; files, and a comdat symbol is defined and used in both of them. Previously,
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;; lld could lose the flag that the symbol is used in a regular object file
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;; which led to the LTO backend internalizing the symbol and the linker
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;; reporting an "undefined symbol" error.
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;; In this test, group "foo" in "obj.o" is rejected in favor of "bc.bc" but we
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;; need to prevent LTO from internalizing "foo" as there is still a reference
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;; from outside the group in "obj.o".
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RUN: rm -rf %t.dir
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RUN: split-file %s %t.dir
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RUN: cd %t.dir
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RUN: llvm-mc -filetype=obj -triple=x86_64 start.s -o start.o
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RUN: llvm-mc -filetype=obj -triple=x86_64 obj.s -o obj.o
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RUN: llvm-as bc.ll -o bc.bc
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RUN: llvm-nm bc.bc --no-sort | FileCheck %s --check-prefix=BCSYM
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RUN: llvm-ar rc lib.a obj.o bc.bc
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RUN: ld.lld start.o lib.a -y foo -y bar -o /dev/null | FileCheck %s --check-prefix=TRACE
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;; "bar" should be encountered before "foo" so that it triggers the loading of
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;; "obj.o" while "foo" is still lazy.
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BCSYM: U bar
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BCSYM-NEXT: W foo
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;; Check that the symbols are handled in the expected order.
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TRACE: lib.a(obj.o): lazy definition of foo
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TRACE-NEXT: lib.a(obj.o): lazy definition of bar
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TRACE-NEXT: lib.a(bc.bc): definition of foo
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TRACE-NEXT: lib.a(bc.bc): reference to bar
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TRACE-NEXT: lib.a(obj.o): definition of bar
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TRACE-NEXT: lib.a(obj.o): reference to foo
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TRACE-NEXT: <internal>: reference to foo
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;; The definition of "foo" is visible outside the LTO result.
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TRACE-NEXT: {{.*}}.lto.o: definition of foo
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TRACE-NEXT: {{.*}}.lto.o: reference to bar
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;--- start.s
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.global _start, baz
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_start:
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call baz
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;--- obj.s
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.weak foo
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.global bar
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.section .text.foo,"axG",@progbits,foo,comdat
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foo:
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ret
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.section .text.bar,"ax",@progbits
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bar:
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call foo
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;--- bc.ll
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target triple = "x86_64-unknown-linux-gnu"
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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$foo = comdat any
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declare void @bar()
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define linkonce_odr void @foo() comdat {
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ret void
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}
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define void @baz() {
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call void @foo()
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call void @bar()
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ret void
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}
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