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

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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"
IR: Don't allow non-default visibility on local linkage Visibilities of `hidden` and `protected` are meaningless for symbols with local linkage. - Change the assembler to reject non-default visibility on symbols with local linkage. - Change the bitcode reader to auto-upgrade `hidden` and `protected` to `default` when the linkage is local. - Update LangRef. <rdar://problem/16141113> llvm-svn: 208263
2014-05-08 06:57:20 +08:00
@in_custom_section = dllexport alias internal i8* @_Z17in_custom_section
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
IR: Don't allow non-default visibility on local linkage Visibilities of `hidden` and `protected` are meaningless for symbols with local linkage. - Change the assembler to reject non-default visibility on symbols with local linkage. - Change the bitcode reader to auto-upgrade `hidden` and `protected` to `default` when the linkage is local. - Update LangRef. <rdar://problem/16141113> llvm-svn: 208263
2014-05-08 06:57:20 +08:00
; CHECK: @in_custom_section = internal dllexport global i8 42, section "CUSTOM"
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
@llvm.used = appending global [1 x i8*] [i8* @in_custom_section], section "llvm.metadata"