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llvm-project/llvm/test/Linker/link-global-to-func.ll

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implement linking of globals to functions, in one direction (replacing a function with a global). This is needed when building llvm itself with LTO on darwin, because of the EXPLICIT_SYMBOL hack in lib/system/DynamicLibrary.cpp. Implementation of linking the other way will need to wait for a cleanup of LinkFunctionProtos. llvm-svn: 53546
2008-07-14 14:49:45 +08:00
; RUN: llvm-as %s -o %t1.bc -f
; RUN: echo {declare void @__eprintf(i8*, i8*, i32, i8*) noreturn define void @foo() { tail call void @__eprintf( i8* undef, i8* undef, i32 4, i8* null ) noreturn nounwind unreachable }} | llvm-as -o %t2.bc -f
; RUN: llvm-link %t2.bc %t1.bc -o - | llvm-dis | grep __eprintf
Reimplement LinkFunctionProtos in terms of GetLinkageResult. This fixes the second half of link-global-to-func.ll and causes some minor changes in messages. There are two TODOs here. First, this causes a regression in 2008-07-06-AliasWeakDest.ll, which is now failing (so I xfailed it). Anton, I would really appreciate it if you could take a look at this. It should be a matter of adding proper alias support to GetLinkageResult, and was probably already a latent bug that would manifest with globals. The second todo is to reimplement LinkAlias in the same pattern as function and global linking. This should be pretty straight-forward for someone who knows aliases, but isn't a requirement for correctness. llvm-svn: 53548
2008-07-14 15:23:24 +08:00
; RUN: llvm-link %t1.bc %t2.bc -o - | llvm-dis | grep __eprintf
implement linking of globals to functions, in one direction (replacing a function with a global). This is needed when building llvm itself with LTO on darwin, because of the EXPLICIT_SYMBOL hack in lib/system/DynamicLibrary.cpp. Implementation of linking the other way will need to wait for a cleanup of LinkFunctionProtos. llvm-svn: 53546
2008-07-14 14:49:45 +08:00
; rdar://6072702
@__eprintf = external global i8* ; <i8**> [#uses=1]
define i8* @test() {
%A = load i8** @__eprintf ; <i8*> [#uses=1]
ret i8* %A
}