forked from OSchip/llvm-project
112 lines
4.8 KiB
LLVM
112 lines
4.8 KiB
LLVM
; REQUIRES: x86
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;; NOTE: We deviate significantly from ld64's behavior here. We treat common
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;; bitcode symbols like regular common symbols, but ld64 gives them different
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;; (and IMO very strange) precedence. This test documents the differences.
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; RUN: rm -rf %t; split-file %s %t
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; RUN: opt -module-summary %t/common.ll -o %t/common.o
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; RUN: opt -module-summary %t/defined.ll -o %t/defined.o
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; RUN: opt -module-summary %t/weak-defined.ll -o %t/weak-defined.o
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; RUN: opt -module-summary %t/libfoo.ll -o %t/libfoo.o
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; RUN: opt -module-summary %t/refs-foo.ll -o %t/refs-foo.o
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; RUN: llvm-mc -filetype=obj -triple=x86_64-apple-darwin %t/weak-defined.s -o %t/weak-defined-asm.o
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; RUN: %lld -dylib -dylib %t/libfoo.o -o %t/libfoo.dylib
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; RUN: llvm-ar rcs %t/defined.a %t/defined.o
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; RUN: llvm-ar rcs %t/defined-and-common.a %t/defined.o %t/common.o
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; RUN: llvm-ar rcs %t/common-and-defined.a %t/common.o %t/defined.o
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; RUN: llvm-ar rcs %t/weak-defined-and-common.a %t/weak-defined.o %t/common.o
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; RUN: llvm-ar rcs %t/common-and-weak-defined.a %t/common.o %t/weak-defined.o
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;; Defined symbols take precedence over common bitcode symbols.
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; RUN: %lld -dylib %t/defined.o %t/common.o -o %t/test
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; RUN: llvm-objdump --syms %t/test | FileCheck %s --check-prefix=DEFINED
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; RUN: %lld -dylib %t/common.o %t/defined.o -o %t/test
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; RUN: llvm-objdump --syms %t/test | FileCheck %s --check-prefix=DEFINED
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;; Defined symbols have the same precedence as common bitcode symbols within
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;; an archive.
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; RUN: %lld -dylib %t/defined-and-common.a %t/refs-foo.o -o %t/refs-foo
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; RUN: llvm-objdump --syms %t/refs-foo | FileCheck %s --check-prefix=DEFINED
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; RUN: %lld -dylib %t/common-and-defined.a %t/refs-foo.o -o %t/refs-foo
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; RUN: llvm-objdump --syms %t/refs-foo | FileCheck %s --check-prefix=COMMON
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;; ld64: Weak bitcode symbols have the same precedence as common bitcode symbols.
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;; lld: Weak bitcode symbols take precedence over common bitcode symbols.
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; RUN: %lld -dylib %t/weak-defined.o %t/common.o -o %t/test
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; RUN: llvm-objdump --syms %t/test | FileCheck %s --check-prefix=WEAK-DEFINED
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; RUN: %lld -dylib %t/common.o %t/weak-defined.o -o %t/test
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; RUN: llvm-objdump --syms %t/test | FileCheck %s --check-prefix=WEAK-DEFINED
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;; Weak non-bitcode symbols take precedence over common bitcode symbols.
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; RUN: %lld -dylib %t/weak-defined-asm.o %t/common.o -o %t/test
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; RUN: llvm-objdump --syms %t/test | FileCheck %s --check-prefix=WEAK-DEFINED
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; RUN: %lld -dylib %t/common.o %t/weak-defined-asm.o -o %t/test
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; RUN: llvm-objdump --syms %t/test | FileCheck %s --check-prefix=WEAK-DEFINED
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;; ld64: Archive symbols take precedence over common bitcode symbols.
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;; lld: Common bitcode symbols take precedence over archive symbols.
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; RUN: %lld -dylib %t/defined.a %t/common.o -o %t/test
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; RUN: llvm-objdump --syms %t/test | FileCheck %s --check-prefix=COMMON
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; COM (ld64): llvm-objdump --syms %t/test | FileCheck %s --check-prefix=DEFINED
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; RUN: %lld -dylib %t/common.o %t/defined.a -o %t/test
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; RUN: llvm-objdump --syms %t/test | FileCheck %s --check-prefix=COMMON
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; COM (ld64): llvm-objdump --syms %t/test | FileCheck %s --check-prefix=DEFINED
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;; ld64: Dylib symbols take precedence over common bitcode symbols.
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;; lld: Common bitcode symbols take precedence over dylib symbols.
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; RUN: %lld -dylib %t/libfoo.dylib %t/common.o %t/refs-foo.o -o %t/test
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; RUN: llvm-objdump --syms %t/test | FileCheck %s --check-prefix=COMMON
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; COM (ld64): llvm-objdump --syms %t/test | FileCheck %s --check-prefix=DYLIB
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; RUN: %lld -dylib %t/common.o %t/libfoo.dylib %t/refs-foo.o -o %t/test
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; RUN: llvm-objdump --syms %t/test | FileCheck %s --check-prefix=COMMON
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; COM (ld64): llvm-objdump --syms %t/test | FileCheck %s --check-prefix=DYLIB
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; COMMON: g O __DATA,__common _foo
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; DEFINED: g O __DATA,__data _foo
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; WEAK-DEFINED: w O __DATA,__data _foo
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; DYLIB: *UND* _foo
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;--- common.ll
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target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.15.0"
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@foo = common global i8 0
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;--- defined.ll
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target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.15.0"
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@foo = global i8 12
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;--- weak-defined.ll
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target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.15.0"
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@foo = weak global i8 12
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;--- weak-defined.s
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.globl _foo
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.weak_definition _foo
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.data
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_foo:
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;--- libfoo.ll
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target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.15.0"
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@foo = common global i8 0
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;--- refs-foo.ll
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target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.15.0"
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@foo = external global i8
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define void @f() {
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%1 = load i8, i8* @foo
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ret void
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}
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