llvm-mirror/test/tools/gold/weak.ll

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

; RUN: ld -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. llvm-svn: 215447 2014-08-12 17:39:14 +02:00			`; RUN: llvm-as %s -o %t.o`
			`; RUN: llvm-as %p/Inputs/weak.ll -o %t2.o`

			`; RUN: ld -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`
Make the test a bit more strict. Before it would pass even if @b or @c ended up pointing to a variable named @a123. llvm-svn: 215450 2014-08-12 17:55:27 +02:00			`; CHECK: @b = global i32* @a{{$}}`
			`; CHECK: @c = global i32* @a{{$}}`