llvm-6502/test/Linker/link-global-to-func.ll

; 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
; RUN: llvm-link %t1.bc %t2.bc -o - | llvm-dis | grep __eprintf

; rdar://6072702

@__eprintf = external global i8*		; <i8**> [#uses=1]

define i8* @test() {
	%A = load i8** @__eprintf		; <i8*> [#uses=1]
	ret i8* %A
}
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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53546 91177308-0d34-0410-b5e6-96231b3b80d8 2008-07-14 06:49:45 +00:00			`; 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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53548 91177308-0d34-0410-b5e6-96231b3b80d8 2008-07-14 07:23:24 +00:00			`; 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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53546 91177308-0d34-0410-b5e6-96231b3b80d8 2008-07-14 06:49:45 +00:00
			`; rdar://6072702`

			`@__eprintf = external global i8* ; <i8**> [#uses=1]`

			`define i8* @test() {`
			`%A = load i8** @__eprintf ; <i8*> [#uses=1]`
			`ret i8* %A`
			`}`