llvm-project/llvm/test/Transforms/GlobalOpt/alias-used-section.ll

; RUN: opt -S -globalopt < %s | FileCheck %s

@_Z17in_custom_section = internal global i8 42, section "CUSTOM"
@in_custom_section = protected dllexport alias internal i8* @_Z17in_custom_section

; CHECK: @in_custom_section = internal protected dllexport global i8 42, section "CUSTOM"

@llvm.used = appending global [1 x i8*] [i8* @in_custom_section], section "llvm.metadata"
GlobalOpt: Aliases don't have sections, don't copy them when replacing As defined in LangRef, aliases do not have sections. However, LLVM's GlobalAlias class inherits from GlobalValue, which means we can read and set its section. We should probably ban that as a separate change, since it doesn't make much sense for an alias to have a section that differs from its aliasee. Fixes PR18757, where the section was being lost on the global in code from Clang like: extern "C" { __attribute__((used, section("CUSTOM"))) static int in_custom_section; } Reviewers: rafael.espindola Differential Revision: http://llvm-reviews.chandlerc.com/D2758 llvm-svn: 201286 2014-02-13 10:18:36 +08:00			`; RUN: opt -S -globalopt < %s \| FileCheck %s`

			`@_Z17in_custom_section = internal global i8 42, section "CUSTOM"`
			`@in_custom_section = protected dllexport alias internal i8* @_Z17in_custom_section`

			`; CHECK: @in_custom_section = internal protected dllexport global i8 42, section "CUSTOM"`

			`@llvm.used = appending global [1 x i8] [i8 @in_custom_section], section "llvm.metadata"`