4e9277eda1
The routing rules are: sym -> __wrap_sym __real_sym -> sym __wrap_sym and sym are routing targets, so they need to be exposed to the symbol table. __real_sym is not and can be eliminated if not used by regular object.
44 lines
1.1 KiB
LLVM
44 lines
1.1 KiB
LLVM
; REQUIRES: x86
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; LTO
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; RUN: llvm-as %s -o %t.o
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; RUN: ld.lld %t.o -o %t.out -wrap=bar -save-temps
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; RUN: llvm-readobj --symbols %t.out | FileCheck %s
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; RUN: cat %t.out.resolution.txt | FileCheck -check-prefix=RESOLS %s
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; ThinLTO
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; RUN: opt -module-summary %s -o %t.o
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; RUN: ld.lld %t.o -o %t.out -wrap=bar -save-temps
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; RUN: llvm-readobj --symbols %t.out | FileCheck %s
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; RUN: cat %t.out.resolution.txt | FileCheck -check-prefix=RESOLS %s
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; CHECK: Name: __wrap_bar
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; CHECK-NEXT: Value:
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; CHECK-NEXT: Size:
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; CHECK-NEXT: Binding: Global
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; CHECK-NEXT: Type: Function
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; Make sure that the 'r' (linker redefined) bit is set for bar and __real_bar
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; in the resolutions file. The calls to bar and __real_bar will be routed to
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; __wrap_bar and bar, respectively. So they cannot be inlined.
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; RESOLS: ,bar,xr{{$}}
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; RESOLS: ,__wrap_bar,plx{{$}}
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; RESOLS: ,__real_bar,plr{{$}}
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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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target triple = "x86_64-unknown-linux-gnu"
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declare void @bar()
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define void @_start() {
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call void @bar()
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ret void
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}
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define void @__wrap_bar() {
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ret void
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}
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define void @__real_bar() {
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ret void
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}
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