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3785a413fe
Add a simple forwarding option in the MinGW frontend, and implement the private -wrap option in the COFF linker. The feature in lld-link isn't gated by the -lldmingw option, but the option is left as a private, undocumented option primarily used by the MinGW driver. The implementation is significantly based on the support for --wrap in the ELF linker, but many small nuance details are different between the ELF and COFF linkers, ending up with more than a few implementation differences. This fixes https://bugs.llvm.org/show_bug.cgi?id=47384. Differential Revision: https://reviews.llvm.org/D89004 Reapplied with the bitfield member canInline fixed so it doesn't break builds targeting windows.
37 lines
1.0 KiB
LLVM
37 lines
1.0 KiB
LLVM
; REQUIRES: x86
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; LTO
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; RUN: llvm-as %s -o %t.obj
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; RUN: lld-link -out:%t.exe %t.obj -entry:entry -subsystem:console -wrap:bar -debug:symtab -lldsavetemps
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; RUN: cat %t.exe.resolution.txt | FileCheck -check-prefix=RESOLS %s
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; ThinLTO
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; RUN: opt -module-summary %s -o %t.obj
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; RUN: lld-link -out:%t.exe %t.obj -entry:entry -subsystem:console -wrap:bar -debug:symtab -lldsavetemps
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; RUN: cat %t.exe.resolution.txt | FileCheck -check-prefix=RESOLS %s
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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,pxr{{$}}
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; RESOLS: ,__real_bar,xr{{$}}
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; RESOLS: ,__wrap_bar,px{{$}}
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target datalayout = "e-m:w-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-w64-windows-gnu"
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define void @bar() {
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ret void
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}
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define void @entry() {
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call void @bar()
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ret void
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}
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declare void @__real_bar()
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define void @__wrap_bar() {
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call void @__real_bar()
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ret void
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}
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