llvm/test/tools/gold/weak.ll

; RUN: llvm-as %s -o %t.o
; RUN: llvm-as %p/Inputs/weak.ll -o %t2.o

; RUN: %gold -plugin %llvmshlibdir/LLVMgold.so \
; RUN:    --plugin-opt=emit-llvm \
; RUN:    -shared %t.o %t2.o -o %t3.o
; RUN: llvm-dis %t3.o -o - | FileCheck %s

@a = weak global i32 42
@b = global i32* @a

; Test that @b and @c end up pointing to the same variable.

; CHECK: @a = weak global i32 42
; CHECK: @b = global i32* @a{{$}}
; CHECK: @c = global i32* @a{{$}}
Add a plugin testcase for merging weak variables. I initially thought I could implement COMDATs with aliases by just internalizing GVs instead of dropping them. This is a counter example: Internalizing one of the @a would make @b and @c point to different variables. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215447 91177308-0d34-0410-b5e6-96231b3b80d8 2014-08-12 15:39:14 +00:00			`; RUN: llvm-as %s -o %t.o`
			`; RUN: llvm-as %p/Inputs/weak.ll -o %t2.o`

[gold] Consolidate the gold plugin options and actually search for a gold binary explicitly. Substitute this binary into the tests rather than just directly executing the 'ld' binary. This should allow folks to inject a cross compiling gold binary, or in my case to use a gold binary built and installed somewhere other than /usr/bin/ld. It should also allow the tests to find 'ld.gold' so that things work even if gold isn't the default on the system. I've only stubbed out support in the makefile to preserve the existing behavior with none of the fancy logic. If someone else wants to add logic here, they're welcome to do so. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@229251 91177308-0d34-0410-b5e6-96231b3b80d8 2015-02-14 09:43:57 +00:00			`; RUN: %gold -plugin %llvmshlibdir/LLVMgold.so \`
Add a plugin testcase for merging weak variables. I initially thought I could implement COMDATs with aliases by just internalizing GVs instead of dropping them. This is a counter example: Internalizing one of the @a would make @b and @c point to different variables. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215447 91177308-0d34-0410-b5e6-96231b3b80d8 2014-08-12 15:39:14 +00:00			`; RUN: --plugin-opt=emit-llvm \`
			`; RUN: -shared %t.o %t2.o -o %t3.o`
			`; RUN: llvm-dis %t3.o -o - \| FileCheck %s`

			`@a = weak global i32 42`
			`@b = global i32* @a`

			`; Test that @b and @c end up pointing to the same variable.`

			`; CHECK: @a = weak global i32 42`
Make the test a bit more strict. Before it would pass even if @b or @c ended up pointing to a variable named @a123. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215450 91177308-0d34-0410-b5e6-96231b3b80d8 2014-08-12 15:55:27 +00:00			`; CHECK: @b = global i32* @a{{$}}`
			`; CHECK: @c = global i32* @a{{$}}`