derek.holloway
7502bf64a4
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56 lines
1.9 KiB
LLVM
56 lines
1.9 KiB
LLVM
; LTO
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; This doesn't currently work with gold, because it does not apply defsym
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; renaming to symbols in the same module (apparently by design for consistency
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; with GNU ld). Because regular LTO hands back a single object file to gold,
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; it doesn't perform the desired defsym renaming. This isn't an issue with
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; ThinLTO which hands back multiple native objects to gold. For regular
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; LTO defsym handling, gold will need a fix (not the gold plugin).
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; RUN-TODO: llvm-as %s -o %t.o
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; RUN-TODO: llvm-as %S/Inputs/wrap-bar.ll -o %t1.o
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; RUN-TODO: %gold -m elf_x86_64 -plugin %llvmshlibdir/LLVMgold%shlibext %t.o %t1.o -shared -o %t.so -wrap=bar
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; RUN-TODO: llvm-objdump -d %t.so | FileCheck %s
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; RUN-TODO: llvm-readobj --symbols %t.so | FileCheck -check-prefix=BIND %s
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; ThinLTO
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; RUN: opt -module-summary %s -o %t.o
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; RUN: opt -module-summary %S/Inputs/wrap-bar.ll -o %t1.o
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; RUN: %gold -m elf_x86_64 -plugin %llvmshlibdir/LLVMgold%shlibext %t.o %t1.o -shared -o %t.so -wrap=bar
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; RUN: llvm-objdump -d %t.so | FileCheck %s --check-prefix=THIN
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; RUN: llvm-readobj --symbols %t.so | FileCheck -check-prefix=BIND %s
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; Make sure that calls in foo() are not eliminated and that bar is
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; routed to __wrap_bar and __real_bar is routed to bar.
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; CHECK: <foo>:
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; CHECK-NEXT: pushq %rax
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; CHECK-NEXT: callq{{.*}}<__wrap_bar>
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; CHECK-NEXT: callq{{.*}}<bar>
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; THIN: <foo>:
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; THIN-NEXT: pushq %rax
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; THIN-NEXT: callq{{.*}}<__wrap_bar>
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; THIN-NEXT: popq %rax
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; THIN-NEXT: jmp{{.*}}<bar>
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; Check that bar and __wrap_bar retain their original binding.
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; BIND: Name: bar
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; BIND-NEXT: Value:
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; BIND-NEXT: Size:
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; BIND-NEXT: Binding: Local
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; BIND: Name: __wrap_bar
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; BIND-NEXT: Value:
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; BIND-NEXT: Size:
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; BIND-NEXT: Binding: Local
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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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declare void @bar()
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declare void @__real_bar()
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define void @foo() {
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call void @bar()
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call void @__real_bar()
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ret void
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}
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