> On 2016-Feb-10, at 22:36, Akira Hatanaka via cfe-commits
> <cfe-commits@lists.llvm.org> wrote:
>
> Author: ahatanak
> Date: Thu Feb 11 00:36:35 2016
> New Revision: 260496
>
> URL: http://llvm.org/viewvc/llvm-project?rev=260496&view=rev
> Log:
> [Objective-c] Stop attaching section "datacoal_nt" to global variables.
>
> The current macho linker just copies symbols in section datacoal_nt to
> section data, so it doesn't really matter whether or not section
> "datacoal_nt" is attached to the global variable.
>
> This is a follow-up to r250370, which made changes in llvm to stop
> putting functions and data in the *coal* sections.
>
> rdar://problem/24528611
>
> Modified:
> cfe/trunk/lib/CodeGen/CGObjCMac.cpp
> cfe/trunk/lib/Frontend/Rewrite/RewriteModernObjC.cpp
> cfe/trunk/test/CodeGenObjC/exceptions-asm-attribute.m
> cfe/trunk/test/CodeGenObjC/metadata-symbols-64.m
> cfe/trunk/test/CodeGenObjC/metadata_symbols.m
>
> Modified: cfe/trunk/lib/CodeGen/CGObjCMac.cpp
> URL:
> http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGObjCMac.cpp?rev=260496&r1=260495&r2=260496&view=diff
> ==============================================================================
> --- cfe/trunk/lib/CodeGen/CGObjCMac.cpp (original)
> +++ cfe/trunk/lib/CodeGen/CGObjCMac.cpp Thu Feb 11 00:36:35 2016
> @@ -6409,7 +6409,7 @@ llvm::Constant *CGObjCNonFragileABIMac::
> const ObjCProtocolDecl *PD) {
> llvm::GlobalVariable *&Entry = Protocols[PD->getIdentifier()];
>
> - if (!Entry) {
> + if (!Entry)
> // We use the initializer as a marker of whether this is a forward
> // reference or not. At module finalization we add the empty
> // contents for protocols which were referenced but never defined.
> @@ -6418,8 +6418,6 @@ llvm::Constant *CGObjCNonFragileABIMac::
> false, llvm::GlobalValue::ExternalLinkage,
> nullptr,
> "\01l_OBJC_PROTOCOL_$_" +
> PD->getObjCRuntimeNameAsString());
> - Entry->setSection("__DATA,__datacoal_nt,coalesced");
> - }
>
> return Entry;
> }
> @@ -6546,7 +6544,6 @@ llvm::Constant *CGObjCNonFragileABIMac::
> "\01l_OBJC_PROTOCOL_$_" +
> PD->getObjCRuntimeNameAsString());
> Entry->setAlignment(
> CGM.getDataLayout().getABITypeAlignment(ObjCTypes.ProtocolnfABITy));
> - Entry->setSection("__DATA,__datacoal_nt,coalesced");
>
> Protocols[PD->getIdentifier()] = Entry;
> }
> @@ -7271,8 +7268,6 @@ CGObjCNonFragileABIMac::GetInterfaceEHTy
>
> if (ForDefinition)
> Entry->setSection("__DATA,__objc_const");
> - else
> - Entry->setSection("__DATA,__datacoal_nt,coalesced");
>
> return Entry;
> }
>
> Modified: cfe/trunk/lib/Frontend/Rewrite/RewriteModernObjC.cpp
> URL:
> http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Frontend/Rewrite/RewriteModernObjC.cpp?rev=260496&r1=260495&r2=260496&view=diff
> ==============================================================================
> --- cfe/trunk/lib/Frontend/Rewrite/RewriteModernObjC.cpp (original)
> +++ cfe/trunk/lib/Frontend/Rewrite/RewriteModernObjC.cpp Thu Feb 11 00:36:35
> 2016
> @@ -6981,7 +6981,7 @@ void RewriteModernObjC::RewriteObjCProto
> Result += "static ";
> Result += "struct _protocol_t _OBJC_PROTOCOL_";
> Result += PDecl->getNameAsString();
> - Result += " __attribute__ ((used, section
> (\"__DATA,__datacoal_nt,coalesced\"))) = {\n";
> + Result += " __attribute__ ((used)) = {\n";
> Result += "\t0,\n"; // id is; is null
> Result += "\t\""; Result += PDecl->getNameAsString(); Result += "\",\n";
> if (SuperProtocols.size() > 0) {
>
> Modified: cfe/trunk/test/CodeGenObjC/exceptions-asm-attribute.m
> URL:
> http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGenObjC/exceptions-asm-attribute.m?rev=260496&r1=260495&r2=260496&view=diff
> ==============================================================================
> --- cfe/trunk/test/CodeGenObjC/exceptions-asm-attribute.m (original)
> +++ cfe/trunk/test/CodeGenObjC/exceptions-asm-attribute.m Thu Feb 11 00:36:35
> 2016
> @@ -12,7 +12,7 @@
> // CHECK-X86_64: @"OBJC_CLASS_$_MySecretNamespace.A" = global {{.*}}, section
> "__DATA, __objc_data", align 8
> // CHECK-X86_64: @"OBJC_METACLASS_$_MySecretNamespace.A" = global {{.*}},
> section "__DATA, __objc_data", align 8
> // CHECK-X86_64: @OBJC_CLASS_NAME_ = {{.*}}, section
> "__TEXT,__objc_classname,cstring_literals", align 1
> -// CHECK-X86_64: @"OBJC_EHTYPE_$_MySecretNamespace.EH1" = weak global
> {{.*}}, section "__DATA,__datacoal_nt,coalesced", align 8
> +// CHECK-X86_64: @"OBJC_EHTYPE_$_MySecretNamespace.EH1" = weak global
> {{.*}}, align 8
> // CHECK-X86_64: @"OBJC_EHTYPE_$_MySecretNamespace.EH2" = external global
> // CHECK-X86_64: @"OBJC_EHTYPE_$_MySecretNamespace.EH3" = global {{.*}},
> section "__DATA,__objc_const", align 8
> // CHECK-X86_64: @"OBJC_LABEL_CLASS_$" = private global {{.*}}, section
> "__DATA, __objc_classlist, regular, no_dead_strip", align 8
> @@ -24,7 +24,7 @@
>
> // CHECK-X86_64-HIDDEN: @"OBJC_CLASS_$_MySecretNamespace.A" = hidden global
> {{.*}}, section "__DATA, __objc_data", align 8
> // CHECK-X86_64-HIDDEN: @"OBJC_METACLASS_$_MySecretNamespace.A" = hidden
> global {{.*}}, section "__DATA, __objc_data", align 8
> -// CHECK-X86_64-HIDDEN: @"OBJC_EHTYPE_$_MySecretNamespace.EH1" = weak hidden
> global {{.*}}, section "__DATA,__datacoal_nt,coalesced"
> +// CHECK-X86_64-HIDDEN: @"OBJC_EHTYPE_$_MySecretNamespace.EH1" = weak hidden
> global {{.*}}
The `{{.*}}` here isn't useful anymore; can you remove it?
Or is there something else you should be checking for?
> // CHECK-X86_64-HIDDEN: @"OBJC_EHTYPE_$_MySecretNamespace.EH2" = external
> global
> // CHECK-X86_64-HIDDEN: @"OBJC_EHTYPE_$_MySecretNamespace.EH3" = hidden
> global {{.*}}, section "__DATA,__objc_const", align 8
> // CHECK-X86_64-HIDDEN: define internal void @"\01-[A im0]"
> @@ -36,7 +36,7 @@
> // CHECK-ARMV6: @"OBJC_CLASS_$_MySecretNamespace.A" = global {{.*}}, section
> "__DATA, __objc_data", align 4
> // CHECK-ARMV6: @"OBJC_METACLASS_$_MySecretNamespace.A" = global {{.*}},
> section "__DATA, __objc_data", align 4
> // CHECK-ARMV6: @OBJC_CLASS_NAME_ = {{.*}}, section
> "__TEXT,__objc_classname,cstring_literals", align 1
> -// CHECK-ARMV6: @"OBJC_EHTYPE_$_MySecretNamespace.EH1" = weak global {{.*}},
> section "__DATA,__datacoal_nt,coalesced", align 4
> +// CHECK-ARMV6: @"OBJC_EHTYPE_$_MySecretNamespace.EH1" = weak global {{.*}},
> align 4
> // CHECK-ARMV6: @"OBJC_EHTYPE_$_MySecretNamespace.EH2" = external global
> // CHECK-ARMV6: @"OBJC_EHTYPE_$_MySecretNamespace.EH3" = global {{.*}},
> section "__DATA,__objc_const", align 4
> // CHECK-ARMV6: @"OBJC_LABEL_CLASS_$" = private global {{.*}}, section
> "__DATA, __objc_classlist, regular, no_dead_strip", align 4
>
> Modified: cfe/trunk/test/CodeGenObjC/metadata-symbols-64.m
> URL:
> http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGenObjC/metadata-symbols-64.m?rev=260496&r1=260495&r2=260496&view=diff
> ==============================================================================
> --- cfe/trunk/test/CodeGenObjC/metadata-symbols-64.m (original)
> +++ cfe/trunk/test/CodeGenObjC/metadata-symbols-64.m Thu Feb 11 00:36:35 2016
> @@ -11,7 +11,7 @@
> // CHECK: @"\01l_OBJC_$_CLASS_METHODS_A" = private global {{.*}} section
> "__DATA, __objc_const", align 8
> // CHECK: @"\01l_OBJC_$_PROTOCOL_INSTANCE_METHODS_P" = private global {{.*}}
> section "__DATA, __objc_const", align 8
> // CHECK: @"\01l_OBJC_$_PROTOCOL_CLASS_METHODS_P" = private global {{.*}}
> section "__DATA, __objc_const", align 8
> -// CHECK: @"\01l_OBJC_PROTOCOL_$_P" = weak hidden global {{.*}} section
> "__DATA,__datacoal_nt,coalesced", align 8
> +// CHECK: @"\01l_OBJC_PROTOCOL_$_P" = weak hidden global {{.*}}, align 8
> // CHECK: @"\01l_OBJC_LABEL_PROTOCOL_$_P" = weak hidden global {{.*}} section
> "__DATA, __objc_protolist, coalesced, no_dead_strip", align 8
> // CHECK: @"\01l_OBJC_CLASS_PROTOCOLS_$_A" = private global {{.*}} section
> "__DATA, __objc_const", align 8
> // CHECK: @"\01l_OBJC_METACLASS_RO_$_A" = private global {{.*}} section
> "__DATA, __objc_const", align 8
>
> Modified: cfe/trunk/test/CodeGenObjC/metadata_symbols.m
> URL:
> http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGenObjC/metadata_symbols.m?rev=260496&r1=260495&r2=260496&view=diff
> ==============================================================================
> --- cfe/trunk/test/CodeGenObjC/metadata_symbols.m (original)
> +++ cfe/trunk/test/CodeGenObjC/metadata_symbols.m Thu Feb 11 00:36:35 2016
> @@ -11,7 +11,7 @@
> // CHECK-X86_64: @"OBJC_CLASS_$_A" = global {{.*}}, section "__DATA,
> __objc_data", align 8
> // CHECK-X86_64: @"OBJC_METACLASS_$_A" = global {{.*}}, section "__DATA,
> __objc_data", align 8
> // CHECK-X86_64: @OBJC_CLASS_NAME_ = {{.*}}, section
> "__TEXT,__objc_classname,cstring_literals", align 1
> -// CHECK-X86_64: @"OBJC_EHTYPE_$_EH1" = weak global {{.*}}, section
> "__DATA,__datacoal_nt,coalesced", align 8
> +// CHECK-X86_64: @"OBJC_EHTYPE_$_EH1" = weak global {{.*}}, align 8
> // CHECK-X86_64: @"OBJC_EHTYPE_$_EH2" = external global
> // CHECK-X86_64: @"OBJC_EHTYPE_$_EH3" = global {{.*}}, section
> "__DATA,__objc_const", align 8
> // CHECK-X86_64: @"OBJC_LABEL_CLASS_$" = private global {{.*}}, section
> "__DATA, __objc_classlist, regular, no_dead_strip", align 8
> @@ -23,7 +23,7 @@
>
> // CHECK-X86_64-HIDDEN: @"OBJC_CLASS_$_A" = hidden global {{.*}}, section
> "__DATA, __objc_data", align 8
> // CHECK-X86_64-HIDDEN: @"OBJC_METACLASS_$_A" = hidden global {{.*}}, section
> "__DATA, __objc_data", align 8
> -// CHECK-X86_64-HIDDEN: @"OBJC_EHTYPE_$_EH1" = weak hidden global {{.*}},
> section "__DATA,__datacoal_nt,coalesced"
> +// CHECK-X86_64-HIDDEN: @"OBJC_EHTYPE_$_EH1" = weak hidden global {{.*}}
Same comment here as above.
> // CHECK-X86_64-HIDDEN: @"OBJC_EHTYPE_$_EH2" = external global
> // CHECK-X86_64-HIDDEN: @"OBJC_EHTYPE_$_EH3" = hidden global {{.*}}, section
> "__DATA,__objc_const", align 8
> // CHECK-X86_64-HIDDEN: define internal void @"\01-[A im0]"
> @@ -35,7 +35,7 @@
> // CHECK-ARMV6: @"OBJC_CLASS_$_A" = global {{.*}}, section "__DATA,
> __objc_data", align 4
> // CHECK-ARMV6: @"OBJC_METACLASS_$_A" = global {{.*}}, section "__DATA,
> __objc_data", align 4
> // CHECK-ARMV6: @OBJC_CLASS_NAME_ = {{.*}}, section
> "__TEXT,__objc_classname,cstring_literals", align 1
> -// CHECK-ARMV6: @"OBJC_EHTYPE_$_EH1" = weak global {{.*}}, section
> "__DATA,__datacoal_nt,coalesced", align 4
> +// CHECK-ARMV6: @"OBJC_EHTYPE_$_EH1" = weak global {{.*}}, align 4
> // CHECK-ARMV6: @"OBJC_EHTYPE_$_EH2" = external global
> // CHECK-ARMV6: @"OBJC_EHTYPE_$_EH3" = global {{.*}}, section
> "__DATA,__objc_const", align 4
> // CHECK-ARMV6: @"OBJC_LABEL_CLASS_$" = private global {{.*}}, section
> "__DATA, __objc_classlist, regular, no_dead_strip", align 4
>
>
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